@@ -367,6 +367,8 @@ source "drivers/gpu/drm/solomon/Kconfig"
source "drivers/gpu/drm/sprd/Kconfig"
+source "drivers/gpu/drm/loongson/Kconfig"
+
config DRM_HYPERV
tristate "DRM Support for Hyper-V synthetic video device"
depends on DRM && PCI && MMU && HYPERV
@@ -190,3 +190,4 @@ obj-y += gud/
obj-$(CONFIG_DRM_HYPERV) += hyperv/
obj-y += solomon/
obj-$(CONFIG_DRM_SPRD) += sprd/
+obj-$(CONFIG_DRM_LOONGSON) += loongson/
new file mode 100644
@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config DRM_LOONGSON
+ tristate "DRM support for Loongson Graphics"
+ depends on DRM && PCI
+ depends on LOONGARCH || MIPS || COMPILE_TEST
+ depends on OF
+ select DRM_KMS_HELPER
+ select DRM_TTM
+ select DRM_TTM_HELPER
+ help
+ This is a DRM driver for Loongson integrated Graphics, including
+ LS7A2000, LS7A1000, LS2K2000 and LS2K1000.
+
+ If "M" is selected, the module will be called loongson.
+
+ If in doubt, say "N".
new file mode 100644
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+
+loongson-y := \
+ lsdc_crtc.o \
+ lsdc_debugfs.o \
+ lsdc_drv.o \
+ lsdc_i2c.o \
+ lsdc_irq.o \
+ lsdc_output.o \
+ lsdc_plane.o \
+ lsdc_pll.o \
+ lsdc_probe.o \
+ lsdc_ttm.o
+
+obj-$(CONFIG_DRM_LOONGSON) += loongson.o
new file mode 100644
@@ -0,0 +1,374 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "lsdc_drv.h"
+
+static u32 lsdc_get_vblank_counter_pipe0(struct drm_crtc *crtc)
+{
+ struct lsdc_device *ldev = to_lsdc(crtc->dev);
+
+ return lsdc_rreg32(ldev, LSDC_CRTC0_VSYNC_COUNTER_REG);
+}
+
+static u32 lsdc_get_vblank_counter_pipe1(struct drm_crtc *crtc)
+{
+ struct lsdc_device *ldev = to_lsdc(crtc->dev);
+
+ return lsdc_rreg32(ldev, LSDC_CRTC1_VSYNC_COUNTER_REG);
+}
+
+static int lsdc_enable_vblank_pipe0(struct drm_crtc *crtc)
+{
+ struct lsdc_device *ldev = to_lsdc(crtc->dev);
+
+ lsdc_ureg32_set(ldev, LSDC_INT_REG, INT_CRTC0_VSYNC_EN);
+
+ return 0;
+}
+
+static void lsdc_disable_vblank_pipe0(struct drm_crtc *crtc)
+{
+ struct lsdc_device *ldev = to_lsdc(crtc->dev);
+
+ lsdc_ureg32_clr(ldev, LSDC_INT_REG, INT_CRTC0_VSYNC_EN);
+}
+
+static int lsdc_enable_vblank_pipe1(struct drm_crtc *crtc)
+{
+ struct lsdc_device *ldev = to_lsdc(crtc->dev);
+
+ lsdc_ureg32_set(ldev, LSDC_INT_REG, INT_CRTC1_VSYNC_EN);
+
+ return 0;
+}
+
+static void lsdc_disable_vblank_pipe1(struct drm_crtc *crtc)
+{
+ struct lsdc_device *ldev = to_lsdc(crtc->dev);
+
+ lsdc_ureg32_clr(ldev, LSDC_INT_REG, INT_CRTC1_VSYNC_EN);
+}
+
+static void lsdc_crtc_reset(struct drm_crtc *crtc)
+{
+ struct drm_device *ddev = crtc->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct lsdc_crtc_state *priv_crtc_state;
+ u32 val = LSDC_PF_XRGB8888 | LSDC_DMA_STEP_64_BYTES | CFG_RESET_N;
+
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_CFG_REG, drm_crtc_index(crtc), val);
+
+ if (crtc->state) {
+ priv_crtc_state = to_lsdc_crtc_state(crtc->state);
+ __drm_atomic_helper_crtc_destroy_state(&priv_crtc_state->base);
+ kfree(priv_crtc_state);
+ }
+
+ priv_crtc_state = kzalloc(sizeof(*priv_crtc_state), GFP_KERNEL);
+ if (!priv_crtc_state)
+ return;
+
+ __drm_atomic_helper_crtc_reset(crtc, &priv_crtc_state->base);
+}
+
+static void lsdc_crtc_atomic_destroy_state(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ struct lsdc_crtc_state *priv_state = to_lsdc_crtc_state(state);
+
+ __drm_atomic_helper_crtc_destroy_state(&priv_state->base);
+
+ kfree(priv_state);
+}
+
+static struct drm_crtc_state *
+lsdc_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
+{
+ struct lsdc_crtc_state *new_priv_state;
+ struct lsdc_crtc_state *old_priv_state;
+
+ new_priv_state = kzalloc(sizeof(*new_priv_state), GFP_KERNEL);
+ if (!new_priv_state)
+ return NULL;
+
+ __drm_atomic_helper_crtc_duplicate_state(crtc, &new_priv_state->base);
+
+ old_priv_state = to_lsdc_crtc_state(crtc->state);
+
+ memcpy(&new_priv_state->pparms, &old_priv_state->pparms,
+ sizeof(new_priv_state->pparms));
+
+ return &new_priv_state->base;
+}
+
+#define LSDC_CRTC_FUNCS_GEN(pipe, pfn_get_vblank_counter) \
+ .reset = lsdc_crtc_reset, \
+ .destroy = drm_crtc_cleanup, \
+ .set_config = drm_atomic_helper_set_config, \
+ .page_flip = drm_atomic_helper_page_flip, \
+ .atomic_duplicate_state = lsdc_crtc_atomic_duplicate_state, \
+ .atomic_destroy_state = lsdc_crtc_atomic_destroy_state, \
+ .get_vblank_counter = pfn_get_vblank_counter, \
+ .enable_vblank = lsdc_enable_vblank_##pipe, \
+ .disable_vblank = lsdc_disable_vblank_##pipe, \
+ .get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp
+
+static const struct drm_crtc_funcs lsdc_crtc_funcs_array[2][LSDC_NUM_CRTC] = {
+ {
+ {
+ LSDC_CRTC_FUNCS_GEN(pipe0, NULL),
+ },
+ {
+ LSDC_CRTC_FUNCS_GEN(pipe1, NULL),
+ },
+ },
+ {
+ {
+ LSDC_CRTC_FUNCS_GEN(pipe0, lsdc_get_vblank_counter_pipe0),
+ },
+ {
+ LSDC_CRTC_FUNCS_GEN(pipe1, lsdc_get_vblank_counter_pipe1),
+ }
+ }
+};
+
+static enum drm_mode_status
+lsdc_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
+{
+ struct drm_device *ddev = crtc->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ const struct lsdc_desc *descp = ldev->descp;
+
+ if (mode->hdisplay > descp->max_width)
+ return MODE_BAD_HVALUE;
+ if (mode->vdisplay > descp->max_height)
+ return MODE_BAD_VVALUE;
+
+ if (mode->clock > descp->max_pixel_clk) {
+ drm_dbg(ddev, "mode %dx%d, pixel clock=%d is too high\n",
+ mode->hdisplay, mode->vdisplay, mode->clock);
+ return MODE_CLOCK_HIGH;
+ }
+
+ /* TODO: check RGB565 support, 4 for DRM_FORMAT_XRGB8888 */
+ if ((mode->hdisplay * 4) % descp->pitch_align) {
+ drm_dbg(ddev, "stride align to %u bytes is required\n",
+ descp->pitch_align);
+ return MODE_BAD_WIDTH;
+ }
+
+ return MODE_OK;
+}
+
+static int lsdc_pixpll_atomic_check(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ struct lsdc_display_pipe *dispipe = crtc_to_display_pipe(crtc);
+ struct lsdc_pll *pixpll = &dispipe->pixpll;
+ const struct lsdc_pixpll_funcs *pfuncs = pixpll->funcs;
+ struct lsdc_crtc_state *priv_state = to_lsdc_crtc_state(state);
+ struct lsdc_pll_parms *pout = &priv_state->pparms;
+ unsigned int clock = state->mode.clock;
+ int ret;
+
+ ret = pfuncs->compute(pixpll, clock, pout);
+ if (ret) {
+ drm_warn(crtc->dev, "Find PLL parms for %ukHz failed\n", clock);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int lsdc_crtc_helper_atomic_check(struct drm_crtc *crtc,
+ struct drm_atomic_state *state)
+{
+ struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+ if (!crtc_state->enable)
+ return 0;
+
+ return lsdc_pixpll_atomic_check(crtc, crtc_state);
+}
+
+static void lsdc_crtc_enable(struct drm_crtc *crtc,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = crtc->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ const struct lsdc_desc *descp = ldev->descp;
+ struct lsdc_display_pipe *dispipe = crtc_to_display_pipe(crtc);
+ struct lsdc_pll *pixpll = &dispipe->pixpll;
+ const struct lsdc_pixpll_funcs *clk_func = pixpll->funcs;
+ struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+ struct lsdc_crtc_state *priv_state = to_lsdc_crtc_state(crtc_state);
+ struct drm_display_mode *mode = &crtc_state->mode;
+ unsigned int index = drm_crtc_index(crtc);
+ unsigned int width_in_bytes = mode->crtc_hdisplay * 4;
+ u32 val;
+
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_HDISPLAY_REG, index,
+ (mode->crtc_htotal << 16) | mode->crtc_hdisplay);
+
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_VDISPLAY_REG, index,
+ (mode->crtc_vtotal << 16) | mode->crtc_vdisplay);
+
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_HSYNC_REG, index,
+ (mode->crtc_hsync_end << 16) |
+ mode->crtc_hsync_start |
+ CFG_HSYNC_EN);
+
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_VSYNC_REG, index,
+ (mode->crtc_vsync_end << 16) |
+ mode->crtc_vsync_start |
+ CFG_VSYNC_EN);
+
+ val = lsdc_crtc_rreg32(ldev, LSDC_CRTC0_CFG_REG, index);
+ /* clear old dma step settings */
+ val &= ~CFG_DMA_STEP_MASK;
+
+ if (descp->chip == CHIP_LS7A2000) {
+ /*
+ * Using large dma step as much as possible,
+ * for improve hardware DMA efficiency.
+ */
+ if (width_in_bytes % 256 == 0)
+ val |= LSDC_DMA_STEP_256_BYTES;
+ else if (width_in_bytes % 128 == 0)
+ val |= LSDC_DMA_STEP_128_BYTES;
+ else if (width_in_bytes % 64 == 0)
+ val |= LSDC_DMA_STEP_64_BYTES;
+ else /* width_in_bytes % 32 == 0 */
+ val |= LSDC_DMA_STEP_32_BYTES;
+ }
+
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_CFG_REG, index, val);
+
+ clk_func->update(pixpll, &priv_state->pparms);
+
+ drm_crtc_vblank_on(crtc);
+
+ lsdc_crtc_ureg32_set(ldev, LSDC_CRTC0_CFG_REG, index, CFG_OUTPUT_EN);
+
+ drm_dbg(ddev, "CRTC-%u enabled: %ux%u\n",
+ index, mode->hdisplay, mode->vdisplay);
+}
+
+static void lsdc_crtc_disable(struct drm_crtc *crtc,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = crtc->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ unsigned int i = drm_crtc_index(crtc);
+
+ drm_crtc_wait_one_vblank(crtc);
+ lsdc_crtc_ureg32_clr(ldev, LSDC_CRTC0_CFG_REG, i, CFG_OUTPUT_EN);
+ drm_crtc_vblank_off(crtc);
+
+ drm_dbg(ddev, "CRTC-%u disabled\n", i);
+}
+
+static void lsdc_crtc_atomic_flush(struct drm_crtc *crtc,
+ struct drm_atomic_state *state)
+{
+ spin_lock_irq(&crtc->dev->event_lock);
+ if (crtc->state->event) {
+ if (drm_crtc_vblank_get(crtc) == 0)
+ drm_crtc_arm_vblank_event(crtc, crtc->state->event);
+ else
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ crtc->state->event = NULL;
+ }
+ spin_unlock_irq(&crtc->dev->event_lock);
+}
+
+static bool lsdc_crtc_get_scanout_position(struct drm_crtc *crtc,
+ bool in_vblank_irq,
+ int *vpos,
+ int *hpos,
+ ktime_t *stime,
+ ktime_t *etime,
+ const struct drm_display_mode *mode)
+{
+ struct drm_device *ddev = crtc->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ unsigned int i = drm_crtc_index(crtc);
+ int line, vsw, vbp, vactive_start, vactive_end, vfp_end;
+ u32 val = 0;
+
+ vsw = mode->crtc_vsync_end - mode->crtc_vsync_start;
+ vbp = mode->crtc_vtotal - mode->crtc_vsync_end;
+
+ vactive_start = vsw + vbp + 1;
+ vactive_end = vactive_start + mode->crtc_vdisplay;
+
+ /* last scan line before VSYNC */
+ vfp_end = mode->crtc_vtotal;
+
+ if (stime)
+ *stime = ktime_get();
+
+ val = lsdc_crtc_rreg32(ldev, LSDC_CRTC0_SCAN_POS_REG, i);
+
+ line = (val & 0xffff);
+
+ if (line < vactive_start)
+ line -= vactive_start;
+ else if (line > vactive_end)
+ line = line - vfp_end - vactive_start;
+ else
+ line -= vactive_start;
+
+ *vpos = line;
+ *hpos = val >> 16;
+
+ if (etime)
+ *etime = ktime_get();
+
+ return true;
+}
+
+static const struct drm_crtc_helper_funcs lsdc_crtc_helper_funcs = {
+ .mode_valid = lsdc_crtc_mode_valid,
+ .atomic_enable = lsdc_crtc_enable,
+ .atomic_disable = lsdc_crtc_disable,
+ .atomic_check = lsdc_crtc_helper_atomic_check,
+ .atomic_flush = lsdc_crtc_atomic_flush,
+ .get_scanout_position = lsdc_crtc_get_scanout_position,
+};
+
+int lsdc_crtc_init(struct drm_device *ddev,
+ struct drm_crtc *crtc,
+ struct drm_plane *primary,
+ struct drm_plane *cursor,
+ unsigned int i)
+{
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ const struct lsdc_desc *descp = ldev->descp;
+ unsigned int has = descp->has_vblank_counter;
+ int ret;
+
+ ret = drm_crtc_init_with_planes(ddev, crtc, primary, cursor,
+ &lsdc_crtc_funcs_array[has][i],
+ "CRTC-%d", i);
+ if (ret) {
+ drm_err(ddev, "crtc init with planes failed: %d\n", ret);
+ return ret;
+ }
+
+ drm_crtc_helper_add(crtc, &lsdc_crtc_helper_funcs);
+
+ drm_dbg(ddev, "%s initialized %s vblank counter support\n",
+ crtc->name, has ? "with" : "without");
+
+ ret = drm_mode_crtc_set_gamma_size(crtc, 256);
+ if (ret)
+ return ret;
+
+ drm_crtc_enable_color_mgmt(crtc, 0, false, 256);
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,236 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <drm/drm_debugfs.h>
+#include <drm/drm_gem_vram_helper.h>
+#include <drm/drm_managed.h>
+
+#include "lsdc_drv.h"
+
+#ifdef CONFIG_DEBUG_FS
+
+static int lsdc_identify(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u8 imp, rev;
+
+ loongson_cpu_get_prid(&imp, &rev);
+
+ seq_printf(m, "I'm in %s, running on cpu 0x%x, cpu revision: 0x%x\n",
+ chip_to_str(ldev->descp->chip), imp, rev);
+
+ return 0;
+}
+
+static int lsdc_show_clock(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct drm_crtc *crtc;
+
+ drm_for_each_crtc(crtc, ddev) {
+ struct lsdc_display_pipe *pipe = crtc_to_display_pipe(crtc);
+ struct lsdc_pll *pixpll = &pipe->pixpll;
+ const struct lsdc_pixpll_funcs *funcs = pixpll->funcs;
+ struct drm_display_mode *mode = &crtc->state->mode;
+ struct lsdc_pll_parms parms;
+ unsigned int out_khz;
+
+ out_khz = funcs->get_clock_rate(pixpll, &parms);
+
+ seq_printf(m, "Display pipe %u: %dx%d\n",
+ pipe->index, mode->hdisplay, mode->vdisplay);
+
+ seq_printf(m, "Frequency actually output: %u kHz\n", out_khz);
+ seq_printf(m, "Pixel clock required: %d kHz\n", mode->clock);
+ seq_printf(m, "diff: %d kHz\n", out_khz - mode->clock);
+
+ seq_printf(m, "div_ref=%u, loopc=%u, div_out=%u\n",
+ parms.div_ref, parms.loopc, parms.div_out);
+
+ seq_printf(m, "hsync_start=%d, hsync_end=%d, htotal=%d\n",
+ mode->hsync_start, mode->hsync_end, mode->htotal);
+ seq_printf(m, "vsync_start=%d, vsync_end=%d, vtotal=%d\n\n",
+ mode->vsync_start, mode->vsync_end, mode->vtotal);
+ }
+
+ return 0;
+}
+
+static int lsdc_show_mm(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct drm_printer p = drm_seq_file_printer(m);
+
+ drm_mm_print(&ddev->vma_offset_manager->vm_addr_space_mm, &p);
+
+ return 0;
+}
+
+#define REG_DEF(reg) { __stringify_1(LSDC_##reg##_REG), LSDC_##reg##_REG }
+static const struct {
+ const char *name;
+ u32 reg_offset;
+} lsdc_regs_array[] = {
+ REG_DEF(CURSOR0_CFG),
+ REG_DEF(CURSOR0_ADDR_LO),
+ REG_DEF(CURSOR0_ADDR_HI),
+ REG_DEF(CURSOR0_POSITION),
+ REG_DEF(CURSOR0_BG_COLOR),
+ REG_DEF(CURSOR0_FG_COLOR),
+ REG_DEF(CRTC0_CFG),
+ REG_DEF(CRTC0_FB_ORIGIN),
+ REG_DEF(CRTC0_HDISPLAY),
+ REG_DEF(CRTC0_HSYNC),
+ REG_DEF(CRTC0_VDISPLAY),
+ REG_DEF(CRTC0_VSYNC),
+ REG_DEF(CRTC0_GAMMA_INDEX),
+ REG_DEF(CRTC0_GAMMA_DATA),
+ REG_DEF(INT),
+ REG_DEF(CRTC1_CFG),
+ REG_DEF(CRTC1_FB_ORIGIN),
+ REG_DEF(CRTC1_HDISPLAY),
+ REG_DEF(CRTC1_HSYNC),
+ REG_DEF(CRTC1_VDISPLAY),
+ REG_DEF(CRTC1_VSYNC),
+ REG_DEF(CRTC1_GAMMA_INDEX),
+ REG_DEF(CRTC1_GAMMA_DATA),
+};
+
+static int lsdc_show_regs(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lsdc_regs_array); i++) {
+ u32 offset = lsdc_regs_array[i].reg_offset;
+ const char *name = lsdc_regs_array[i].name;
+
+ seq_printf(m, "%s (0x%04x): 0x%08x\n",
+ name, offset, lsdc_rreg32(ldev, offset));
+ }
+
+ return 0;
+}
+
+static int lsdc_show_vblank_counter(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+
+ seq_printf(m, "CRTC-0 vblank counter: %08u\n",
+ lsdc_rreg32(ldev, LSDC_CRTC0_VSYNC_COUNTER_REG));
+
+ seq_printf(m, "CRTC-1 vblank counter: %08u\n",
+ lsdc_rreg32(ldev, LSDC_CRTC1_VSYNC_COUNTER_REG));
+
+ return 0;
+}
+
+static int lsdc_show_scan_position(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 p0 = lsdc_rreg32(ldev, LSDC_CRTC0_SCAN_POS_REG);
+ u32 p1 = lsdc_rreg32(ldev, LSDC_CRTC1_SCAN_POS_REG);
+
+ seq_printf(m, "CRTC-0: x: %08u, y: %08u\n", p0 >> 16, p0 & 0xFFFF);
+ seq_printf(m, "CRTC-1: x: %08u, y: %08u\n", p1 >> 16, p1 & 0xFFFF);
+
+ return 0;
+}
+
+static int lsdc_show_fb_addr(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 lo, hi;
+ u32 val;
+
+ val = lsdc_rreg32(ldev, LSDC_CRTC0_CFG_REG);
+ if (val & CFG_FB_IN_USING) {
+ lo = lsdc_rreg32(ldev, LSDC_CRTC0_FB1_LO_ADDR_REG);
+ hi = lsdc_rreg32(ldev, LSDC_CRTC0_FB1_HI_ADDR_REG);
+ seq_printf(m, "CRTC-0 using fb1: 0x%x:%x\n", hi, lo);
+ } else {
+ lo = lsdc_rreg32(ldev, LSDC_CRTC0_FB0_LO_ADDR_REG);
+ hi = lsdc_rreg32(ldev, LSDC_CRTC0_FB0_HI_ADDR_REG);
+ seq_printf(m, "CRTC-0 using fb0: 0x%x:%x\n", hi, lo);
+ }
+
+ val = lsdc_rreg32(ldev, LSDC_CRTC1_CFG_REG);
+ if (val & CFG_FB_IN_USING) {
+ lo = lsdc_rreg32(ldev, LSDC_CRTC1_FB1_LO_ADDR_REG);
+ hi = lsdc_rreg32(ldev, LSDC_CRTC1_FB1_HI_ADDR_REG);
+ seq_printf(m, "CRTC-1 using fb1: 0x%x:%x\n", hi, lo);
+ } else {
+ lo = lsdc_rreg32(ldev, LSDC_CRTC1_FB0_LO_ADDR_REG);
+ hi = lsdc_rreg32(ldev, LSDC_CRTC1_FB0_HI_ADDR_REG);
+ seq_printf(m, "CRTC-1 using fb0: 0x%x:%x\n", hi, lo);
+ }
+
+ return 0;
+}
+
+static int lsdc_show_stride(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 stride0 = lsdc_rreg32(ldev, LSDC_CRTC0_STRIDE_REG);
+ u32 stride1 = lsdc_rreg32(ldev, LSDC_CRTC1_STRIDE_REG);
+
+ seq_printf(m, "PIPE-0 stride: %u\n", stride0);
+ seq_printf(m, "PIPE-1 stride: %u\n", stride1);
+
+ return 0;
+}
+
+static int lsdc_trigger_flip_fb(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 val;
+
+ val = lsdc_rreg32(ldev, LSDC_CRTC0_CFG_REG);
+ lsdc_wreg32(ldev, LSDC_CRTC0_CFG_REG, val | CFG_PAGE_FLIP);
+ seq_puts(m, "CRTC-0 flip triggered\n");
+
+ val = lsdc_rreg32(ldev, LSDC_CRTC1_CFG_REG);
+ lsdc_wreg32(ldev, LSDC_CRTC1_CFG_REG, val | CFG_PAGE_FLIP);
+ seq_puts(m, "CRTC-1 flip triggered\n");
+
+ return 0;
+}
+
+static struct drm_info_list lsdc_debugfs_list[] = {
+ { "chip", lsdc_identify, 0, NULL },
+ { "clocks", lsdc_show_clock, 0 },
+ { "mm", lsdc_show_mm, 0, NULL },
+ { "regs", lsdc_show_regs, 0 },
+ { "vblanks", lsdc_show_vblank_counter, 0, NULL },
+ { "scan_pos", lsdc_show_scan_position, 0, NULL },
+ { "fb_addr", lsdc_show_fb_addr, 0, NULL },
+ { "stride", lsdc_show_stride, 0, NULL },
+ { "flip", lsdc_trigger_flip_fb, 0, NULL },
+};
+
+#endif
+
+void lsdc_debugfs_init(struct drm_minor *minor)
+{
+#ifdef CONFIG_DEBUG_FS
+ drm_debugfs_create_files(lsdc_debugfs_list,
+ ARRAY_SIZE(lsdc_debugfs_list),
+ minor->debugfs_root,
+ minor);
+#endif
+}
new file mode 100644
@@ -0,0 +1,495 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/of_address.h>
+#include <linux/pci.h>
+
+#include <drm/drm_aperture.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_ioctl.h>
+#include <drm/drm_modeset_helper.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_output.h"
+#include "lsdc_ttm.h"
+
+#define DRIVER_AUTHOR "Sui Jingfeng <suijingfeng@loongson.cn>"
+#define DRIVER_NAME "loongson"
+#define DRIVER_DESC "drm driver for loongson's display controller"
+#define DRIVER_DATE "20220701"
+#define DRIVER_MAJOR 1
+#define DRIVER_MINOR 0
+#define DRIVER_PATCHLEVEL 0
+
+static const struct lsdc_desc dc_in_ls7a1000 = {
+ .chip = CHIP_LS7A1000,
+ .num_of_crtc = LSDC_NUM_CRTC,
+ .max_pixel_clk = 200000,
+ .max_width = 2048,
+ .max_height = 2048,
+ .num_of_hw_cursor = 1,
+ .hw_cursor_w = 32,
+ .hw_cursor_h = 32,
+ .pitch_align = 256,
+ .mc_bits = 40,
+ .has_vblank_counter = false,
+ .has_scan_pos = true,
+ .has_builtin_i2c = true,
+ .has_vram = true,
+ .has_hpd_reg = false,
+ .is_soc = false,
+};
+
+static const struct lsdc_desc dc_in_ls7a2000 = {
+ .chip = CHIP_LS7A2000,
+ .num_of_crtc = LSDC_NUM_CRTC,
+ .max_pixel_clk = 350000,
+ .max_width = 4096,
+ .max_height = 4096,
+ .num_of_hw_cursor = 2,
+ .hw_cursor_w = 64,
+ .hw_cursor_h = 64,
+ .pitch_align = 64,
+ .mc_bits = 40, /* support 48, but use 40 for backward compatibility */
+ .has_vblank_counter = true,
+ .has_scan_pos = true,
+ .has_builtin_i2c = true,
+ .has_vram = true,
+ .has_hpd_reg = true,
+ .is_soc = false,
+};
+
+const char *chip_to_str(enum loongson_chip_family chip)
+{
+ if (chip == CHIP_LS7A2000)
+ return "LS7A2000";
+
+ if (chip == CHIP_LS7A1000)
+ return "LS7A1000";
+
+ return "unknown";
+}
+
+DEFINE_DRM_GEM_FOPS(lsdc_gem_fops);
+
+static const struct drm_driver lsdc_drm_driver = {
+ .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
+ .fops = &lsdc_gem_fops,
+
+ .name = DRIVER_NAME,
+ .desc = DRIVER_DESC,
+ .date = DRIVER_DATE,
+ .major = DRIVER_MAJOR,
+ .minor = DRIVER_MINOR,
+ .patchlevel = DRIVER_PATCHLEVEL,
+
+ .debugfs_init = lsdc_debugfs_init,
+ .dumb_create = lsdc_dumb_create,
+ .dumb_map_offset = lsdc_dumb_map_offset,
+ .gem_prime_mmap = drm_gem_prime_mmap,
+};
+
+static enum drm_mode_status
+lsdc_mode_config_mode_valid(struct drm_device *ddev,
+ const struct drm_display_mode *mode)
+{
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ const struct drm_format_info *info = drm_format_info(DRM_FORMAT_XRGB8888);
+ u64 min_pitch = drm_format_info_min_pitch(info, 0, mode->hdisplay);
+ u64 fb_size = min_pitch * mode->vdisplay;
+
+ if (fb_size * 3 > ldev->vram_size)
+ return MODE_MEM;
+
+ return MODE_OK;
+}
+
+static const struct drm_mode_config_funcs lsdc_mode_config_funcs = {
+ .fb_create = drm_gem_fb_create,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+ .mode_valid = lsdc_mode_config_mode_valid,
+};
+
+static int lsdc_modeset_init(struct lsdc_device *ldev,
+ const struct lsdc_desc *descp)
+{
+ struct drm_device *ddev = &ldev->base;
+ unsigned int num_crtc = descp->num_of_crtc;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < num_crtc; i++) {
+ struct lsdc_display_pipe *dispipe = &ldev->dispipe[i];
+ /* We need a index before crtc is initialized */
+ dispipe->index = i;
+
+ ret = lsdc_create_output(ldev, dispipe);
+ if (ret)
+ return ret;
+
+ ldev->num_output++;
+ }
+
+ for (i = 0; i < num_crtc; i++) {
+ struct lsdc_display_pipe *dispipe = &ldev->dispipe[i];
+
+ ret = lsdc_pixpll_init(&dispipe->pixpll, ddev, i);
+ if (ret)
+ return ret;
+
+ ret = lsdc_primary_plane_init(ldev, &dispipe->primary, i);
+ if (ret)
+ return ret;
+
+ ret = lsdc_cursor_plane_init(ldev, &dispipe->cursor, i);
+ if (ret)
+ return ret;
+
+ ret = lsdc_crtc_init(ddev, &dispipe->crtc, &dispipe->primary, &dispipe->cursor, i);
+ if (ret)
+ return ret;
+ }
+
+ drm_mode_config_reset(ddev);
+
+ drm_info(ddev, "modeset init finished, total %u output\n", ldev->num_output);
+
+ return 0;
+}
+
+static int lsdc_mode_config_init(struct drm_device *ddev,
+ const struct lsdc_desc *descp)
+{
+ int ret;
+
+ ret = drmm_mode_config_init(ddev);
+ if (ret)
+ return ret;
+
+ ddev->mode_config.funcs = &lsdc_mode_config_funcs;
+ ddev->mode_config.min_width = 1;
+ ddev->mode_config.min_height = 1;
+ ddev->mode_config.max_width = descp->max_width * LSDC_NUM_CRTC;
+ ddev->mode_config.max_height = descp->max_height * LSDC_NUM_CRTC;
+ ddev->mode_config.preferred_depth = 24;
+ ddev->mode_config.prefer_shadow = descp->has_vram;
+
+ ddev->mode_config.cursor_width = descp->hw_cursor_h;
+ ddev->mode_config.cursor_height = descp->hw_cursor_h;
+
+ if (descp->has_vblank_counter)
+ ddev->max_vblank_count = 0xffffffff;
+
+ return ret;
+}
+
+static const struct lsdc_desc *
+lsdc_detect_chip(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ enum loongson_chip_family chip = ent->driver_data;
+
+ if (chip == CHIP_LS7A1000)
+ return &dc_in_ls7a1000;
+
+ if (chip == CHIP_LS7A2000)
+ return &dc_in_ls7a2000;
+
+ return ERR_PTR(-ENODEV);
+}
+
+static int lsdc_get_dedicated_vram(struct lsdc_device *ldev,
+ const struct lsdc_desc *descp)
+{
+ struct drm_device *ddev = &ldev->base;
+ struct pci_dev *gpu;
+ resource_size_t base, size;
+
+ /*
+ * The GPU and display controller in LS7A1000/LS7A2000 are separated
+ * PCIE devices, they are two devices not one. The DC does not has a
+ * dedicate VRAM bar, because the BIOS engineer choose to assign the
+ * VRAM to the GPU device. Sadly, after years application, this form
+ * as a convention for loongson integrated graphics. LS7A2000 bridge
+ * chip integrated 32-bit DDR4@2400 video memtory controller, while
+ * it is just 16-bit DDR3 for LS7A1000. For LS7A2000/LS7A1000, bar 2
+ * of GPU device contain the physical base address and size in bytes
+ * of the VRAM, both the GPU and the DC can access the on-board VRAM
+ * as long as the DMA address emitted fall in [base, base + size).
+ */
+ if (descp->chip == CHIP_LS7A1000)
+ gpu = pci_get_device(PCI_VENDOR_ID_LOONGSON, 0x7A15, NULL);
+ else if (descp->chip == CHIP_LS7A2000)
+ gpu = pci_get_device(PCI_VENDOR_ID_LOONGSON, 0x7A25, NULL);
+
+ if (!gpu) {
+ drm_warn(ddev, "No GPU device found\n");
+ return -ENODEV;
+ }
+
+ base = pci_resource_start(gpu, 2);
+ size = pci_resource_len(gpu, 2);
+
+ ldev->vram_base = base;
+ ldev->vram_size = size;
+
+ drm_info(ddev, "dedicated vram start: 0x%llx, size: %uMB\n",
+ (u64)base, (u32)(size >> 20));
+
+ return 0;
+}
+
+static struct lsdc_device *
+lsdc_create_device(struct pci_dev *pdev,
+ const struct pci_device_id *ent,
+ const struct drm_driver *drv)
+{
+ struct lsdc_device *ldev;
+ struct drm_device *ddev;
+ const struct lsdc_desc *descp;
+ int ret;
+
+ ldev = devm_drm_dev_alloc(&pdev->dev, drv, struct lsdc_device, base);
+ if (IS_ERR(ldev))
+ return ldev;
+
+ ddev = &ldev->base;
+
+ pci_set_drvdata(pdev, ddev);
+
+ descp = lsdc_detect_chip(pdev, ent);
+ if (IS_ERR_OR_NULL(descp)) {
+ drm_err(ddev, "Not known device, the driver need update!\n");
+ return NULL;
+ }
+
+ drm_info(ddev, "%s found, revision: %u", chip_to_str(descp->chip), pdev->revision);
+
+ ldev->descp = descp;
+
+ spin_lock_init(&ldev->reglock);
+
+ /* BAR 0 of the DC device contain registers base address */
+ ldev->reg_base = pcim_iomap(pdev, 0, 0);
+ if (!ldev->reg_base)
+ return ERR_PTR(-ENODEV);
+
+ ret = lsdc_get_dedicated_vram(ldev, descp);
+ if (ret) {
+ drm_err(ddev, "Init VRAM failed: %d\n", ret);
+ return ERR_PTR(ret);
+ }
+
+ ret = drm_aperture_remove_conflicting_framebuffers(ldev->vram_base,
+ ldev->vram_size,
+ false,
+ drv);
+ if (ret) {
+ drm_err(ddev, "remove firmware framebuffers failed: %d\n", ret);
+ return ERR_PTR(ret);
+ }
+
+ ret = lsdc_ttm_init(ldev);
+ if (ret) {
+ drm_err(ddev, "memory manager init failed: %d\n", ret);
+ return ERR_PTR(ret);
+ }
+
+ ret = lsdc_mode_config_init(ddev, descp);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = lsdc_modeset_init(ldev, descp);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = drm_vblank_init(ddev, descp->num_of_crtc);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ret = request_threaded_irq(pdev->irq,
+ lsdc_get_irq_handler(ldev),
+ lsdc_irq_thread_handler,
+ IRQF_ONESHOT,
+ dev_name(ddev->dev),
+ ddev);
+ if (ret) {
+ drm_err(ddev, "Failed to register interrupt: %d\n", ret);
+ return ERR_PTR(ret);
+ }
+
+ drm_kms_helper_poll_init(ddev);
+
+ return ldev;
+}
+
+static int lsdc_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct drm_device *ddev;
+ struct lsdc_device *ldev;
+ int ret;
+
+ ret = pcim_enable_device(pdev);
+ if (ret)
+ return ret;
+
+ pci_set_master(pdev);
+
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
+ if (ret)
+ return ret;
+
+ ldev = lsdc_create_device(pdev, ent, &lsdc_drm_driver);
+ if (IS_ERR(ldev))
+ return PTR_ERR(ldev);
+
+ ddev = &ldev->base;
+
+ ret = drm_dev_register(ddev, 0);
+ if (ret)
+ return ret;
+
+ drm_fbdev_generic_setup(ddev, 32);
+
+ return 0;
+}
+
+static void lsdc_pci_remove(struct pci_dev *pdev)
+{
+ struct drm_device *ddev = pci_get_drvdata(pdev);
+
+ drm_dev_unregister(ddev);
+ drm_atomic_helper_shutdown(ddev);
+}
+
+static int lsdc_drm_freeze(struct drm_device *ddev)
+{
+ int error;
+
+ error = drm_mode_config_helper_suspend(ddev);
+ if (error)
+ return error;
+
+ pci_save_state(to_pci_dev(ddev->dev));
+
+ return 0;
+}
+
+static int lsdc_drm_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct drm_device *ddev = pci_get_drvdata(pdev);
+
+ return drm_mode_config_helper_resume(ddev);
+}
+
+static int lsdc_pm_freeze(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct drm_device *ddev = pci_get_drvdata(pdev);
+
+ return lsdc_drm_freeze(ddev);
+}
+
+static int lsdc_pm_thaw(struct device *dev)
+{
+ return lsdc_drm_resume(dev);
+}
+
+static int lsdc_pm_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ int error;
+
+ error = lsdc_pm_freeze(dev);
+ if (error)
+ return error;
+
+ pci_save_state(pdev);
+ /* Shut down the device */
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, PCI_D3hot);
+
+ return 0;
+}
+
+static int lsdc_pm_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ if (pcim_enable_device(pdev))
+ return -EIO;
+
+ pci_set_power_state(pdev, PCI_D0);
+
+ pci_restore_state(pdev);
+
+ return lsdc_pm_thaw(dev);
+}
+
+static const struct dev_pm_ops lsdc_pm_ops = {
+ .suspend = lsdc_pm_suspend,
+ .resume = lsdc_pm_resume,
+ .freeze = lsdc_pm_freeze,
+ .thaw = lsdc_pm_thaw,
+ .poweroff = lsdc_pm_freeze,
+ .restore = lsdc_pm_resume,
+};
+
+static const struct pci_device_id lsdc_pciid_list[] = {
+ {PCI_VENDOR_ID_LOONGSON, 0x7a06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_LS7A1000},
+ {PCI_VENDOR_ID_LOONGSON, 0x7a36, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_LS7A2000},
+ {0, 0, 0, 0, 0, 0, 0}
+};
+
+static struct pci_driver lsdc_pci_driver = {
+ .name = DRIVER_NAME,
+ .id_table = lsdc_pciid_list,
+ .probe = lsdc_pci_probe,
+ .remove = lsdc_pci_remove,
+ .driver.pm = &lsdc_pm_ops,
+};
+
+static int __init loongson_module_init(void)
+{
+ struct pci_dev *pdev = NULL;
+
+ if (drm_firmware_drivers_only())
+ return -ENODEV;
+
+ /*
+ * Ah, it seems weird to write code like below, but our intention is
+ * don't crash the entire system before a final decision is made.
+ * We intend to write a all-in-one driver which can rules them all.
+ */
+ if (lsdc_is_ls2k1000() || lsdc_is_ls2k2000())
+ return -ENODEV;
+
+ while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev))) {
+ /* Multiple video card workaround */
+ if (pdev->vendor != PCI_VENDOR_ID_LOONGSON) {
+ pr_info("Discrete graphic card detected, abort\n");
+ return 0;
+ }
+ }
+
+ return pci_register_driver(&lsdc_pci_driver);
+}
+module_init(loongson_module_init);
+
+static void __exit loongson_module_exit(void)
+{
+ pci_unregister_driver(&lsdc_pci_driver);
+}
+module_exit(loongson_module_exit);
+
+MODULE_DEVICE_TABLE(pci, lsdc_pciid_list);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,314 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * KMS driver for Loongson display controller
+ * Copyright (C) 2022 Loongson Corporation
+ *
+ * Authors:
+ * Li Yi <liyi@loongson.cn>
+ * Sui Jingfeng <suijingfeng@loongson.cn>
+ */
+
+#ifndef __LSDC_DRV_H__
+#define __LSDC_DRV_H__
+
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_plane.h>
+#include <drm/ttm/ttm_device.h>
+
+#include "lsdc_pll.h"
+#include "lsdc_regs.h"
+
+#define LSDC_NUM_CRTC 2
+
+/*
+ * LS7A1000 and LS7A2000 function as north bridge of the LS3A4000/LS3A5000,
+ * They are equipped on-board Video RAM. While LS2K2000/LS2K1000 are SoC,
+ * they don't have dediacated Video RAM.
+ *
+ * The display controller in LS7A2000 has two display pipe, LS7A2000 has also
+ * integrated three encoders, display pipe 0 is attached with a transparent
+ * VGA encoder and a HDMI phy, they are parallel. Display pipe 1 has only
+ * one HDMI phy attached. Currently, all display controllers of loongson
+ * have jsut two display pipes.
+ *
+ * There is only a 1:1 mapping of crtcs, encoders and connectors for the DC,
+ * display pipe 0 = crtc0 + dvo0 + encoder0 + connector0 + cursor0 + primary0
+ * display pipe 1 = crtc1 + dvo1 + encoder1 + connectro1 + cursor1 + primary1
+ * Each CRTC have two FB address registers.
+ *
+ *
+ * ______________________ _____________
+ * | +-----+ | | |
+ * | CRTC0 -+--> | VGA | ----> VGA Connector ---> | VGA Monitor |<---+
+ * | | +-----+ | |_____________| |
+ * | | | ______________ |
+ * | | +------+ | | | |
+ * | +--> | HDMI | ----> HDMI Connector --> | HDMI Monitor |<--+
+ * | +------+ | |______________| |
+ * | +------+ | |
+ * | | i2c6 | <-------------------------------------------+
+ * | +------+ |
+ * | |
+ * | DC in LS7A2000 |
+ * | |
+ * | +------+ |
+ * | | i2c7 | <--------------------------------+
+ * | +------+ | |
+ * | | ______|_______
+ * | +------+ | | |
+ * | CRTC1 ---> | HDMI | ----> HDMI Connector ---> | HDMI Monitor |
+ * | +------+ | |______________|
+ * |______________________|
+ *
+ *
+ * The display controller in LS7A1000 has only two-way DVO interface exported,
+ * thus, external encoder(TX chip) is required except connected with DPI panel
+ * directly.
+ * ___________________ _________
+ * | -------| | |
+ * | CRTC0 --> | DVO0 ----> Encoder0 ---> Connector0 ---> | Display |
+ * | _ _ -------| ^ ^ |_________|
+ * | | | | | +------+ | | |
+ * | |_| |_| | i2c6 | <--------+-------------+
+ * | +------+ |
+ * | DC in LS7A1000 |
+ * | _ _ +------+ |
+ * | | | | | | i2c7 | <--------+-------------+
+ * | |_| |_| +------+ | | | _________
+ * | -------| | | | |
+ * | CRTC1 --> | DVO1 ----> Encoder1 ---> Connector1 ---> | Panel |
+ * | -------| |_________|
+ * |___________________|
+ *
+ * The DC in LS7A1000/LS2K1000 has the pci vendor/device ID: 0x0014:0x7a06,
+ * The DC in LS7A2000/LS2K2000 has the pci vendor/device ID: 0x0014:0x7a36,
+ * LS7A1000 and LS7A2000 can only be used with LS3A4000 and LS3A5000 CPU,
+ * thus, CPU PRID can be used to make a distinction.
+ */
+
+enum loongson_chip_family {
+ CHIP_LS7A1000 = 0,
+ CHIP_LS7A2000 = 1,
+ CHIP_LAST,
+};
+
+struct lsdc_desc {
+ enum loongson_chip_family chip;
+ u32 num_of_crtc;
+ u32 max_pixel_clk;
+ u32 max_width;
+ u32 max_height;
+ u32 num_of_hw_cursor;
+ u32 hw_cursor_w;
+ u32 hw_cursor_h;
+ u32 pitch_align; /* DMA alignment constraint */
+ u64 mc_bits; /* physical address bus bit width */
+ bool has_vblank_counter; /* 32 bit hw vsync counter */
+ bool has_scan_pos; /* crtc scan position recorder */
+ bool has_builtin_i2c;
+ bool has_vram;
+ bool has_hpd_reg;
+ bool is_soc;
+};
+
+struct lsdc_i2c {
+ struct i2c_adapter adapter;
+ struct i2c_algo_bit_data bit;
+ struct drm_device *ddev;
+ void __iomem *reg_base;
+ void __iomem *dir_reg;
+ void __iomem *dat_reg;
+ /* pin bit mask */
+ u8 sda;
+ u8 scl;
+};
+
+struct lsdc_display_pipe {
+ struct drm_crtc crtc;
+ struct drm_plane primary;
+ struct drm_plane cursor;
+ struct drm_encoder encoder;
+ struct drm_connector connector;
+ struct lsdc_pll pixpll;
+ struct lsdc_i2c *li2c;
+ unsigned int index;
+};
+
+static inline struct lsdc_display_pipe *
+crtc_to_display_pipe(struct drm_crtc *crtc)
+{
+ return container_of(crtc, struct lsdc_display_pipe, crtc);
+}
+
+static inline struct lsdc_display_pipe *
+cursor_to_display_pipe(struct drm_plane *plane)
+{
+ return container_of(plane, struct lsdc_display_pipe, cursor);
+}
+
+static inline struct lsdc_display_pipe *
+connector_to_display_pipe(struct drm_connector *connector)
+{
+ return container_of(connector, struct lsdc_display_pipe, connector);
+}
+
+static inline struct lsdc_display_pipe *
+encoder_to_display_pipe(struct drm_encoder *encoder)
+{
+ return container_of(encoder, struct lsdc_display_pipe, encoder);
+}
+
+struct lsdc_crtc_state {
+ struct drm_crtc_state base;
+ struct lsdc_pll_parms pparms;
+};
+
+struct lsdc_device {
+ struct drm_device base;
+ struct ttm_device bdev;
+ /* @descp: features description of the DC variant */
+ const struct lsdc_desc *descp;
+
+ /* @reglock: protects concurrent access */
+ spinlock_t reglock;
+ void __iomem *reg_base;
+ resource_size_t vram_base;
+ resource_size_t vram_size;
+
+ struct lsdc_display_pipe dispipe[LSDC_NUM_CRTC];
+
+ /* @num_output: count the number of active display pipe */
+ unsigned int num_output;
+
+ u32 irq_status;
+};
+
+static inline struct lsdc_device *
+tdev_to_lsdc(struct ttm_device *bdev)
+{
+ return container_of(bdev, struct lsdc_device, bdev);
+}
+
+static inline struct lsdc_device *
+to_lsdc(struct drm_device *ddev)
+{
+ return container_of(ddev, struct lsdc_device, base);
+}
+
+static inline struct lsdc_crtc_state *
+to_lsdc_crtc_state(struct drm_crtc_state *base)
+{
+ return container_of(base, struct lsdc_crtc_state, base);
+}
+
+const char *chip_to_str(enum loongson_chip_family chip);
+
+void lsdc_debugfs_init(struct drm_minor *minor);
+
+int lsdc_crtc_init(struct drm_device *ddev,
+ struct drm_crtc *crtc,
+ struct drm_plane *primary,
+ struct drm_plane *cursor,
+ unsigned int index);
+
+int lsdc_primary_plane_init(struct lsdc_device *ldev,
+ struct drm_plane *plane,
+ unsigned int index);
+
+int lsdc_cursor_plane_init(struct lsdc_device *ldev,
+ struct drm_plane *plane,
+ unsigned int index);
+
+irqreturn_t lsdc_irq_thread_handler(int irq, void *arg);
+irq_handler_t lsdc_get_irq_handler(struct lsdc_device *ldev);
+
+static inline u32 lsdc_rreg32(struct lsdc_device *ldev, u32 offset)
+{
+ return readl(ldev->reg_base + offset);
+}
+
+static inline void lsdc_wreg32(struct lsdc_device *ldev, u32 offset, u32 val)
+{
+ writel(val, ldev->reg_base + offset);
+}
+
+static inline void lsdc_ureg32_set(struct lsdc_device *ldev,
+ u32 offset,
+ u32 bit)
+{
+ void __iomem *addr = ldev->reg_base + offset;
+ u32 val = readl(addr);
+
+ writel(val | bit, addr);
+}
+
+static inline void lsdc_ureg32_clr(struct lsdc_device *ldev,
+ u32 offset,
+ u32 bit)
+{
+ void __iomem *addr = ldev->reg_base + offset;
+ u32 val = readl(addr);
+
+ writel(val & ~bit, addr);
+}
+
+static inline u32 lsdc_pipe_rreg32(struct lsdc_device *ldev,
+ u32 offset,
+ u32 pipe)
+{
+ return readl(ldev->reg_base + offset + pipe * CRTC_PIPE_OFFSET);
+}
+
+#define lsdc_hdmi_rreg32 lsdc_pipe_rreg32
+#define lsdc_crtc_rreg32 lsdc_pipe_rreg32
+
+static inline void lsdc_pipe_wreg32(struct lsdc_device *ldev,
+ u32 offset,
+ u32 pipe,
+ u32 val)
+{
+ writel(val, ldev->reg_base + offset + pipe * CRTC_PIPE_OFFSET);
+}
+
+#define lsdc_hdmi_wreg32 lsdc_pipe_wreg32
+#define lsdc_crtc_wreg32 lsdc_pipe_wreg32
+
+static inline void lsdc_crtc_ureg32_set(struct lsdc_device *ldev,
+ u32 offset,
+ u32 pipe,
+ u32 bit)
+{
+ void __iomem *addr;
+ u32 val;
+
+ addr = ldev->reg_base + offset + pipe * CRTC_PIPE_OFFSET;
+ val = readl(addr);
+ writel(val | bit, addr);
+}
+
+static inline void lsdc_crtc_ureg32_clr(struct lsdc_device *ldev,
+ u32 offset,
+ u32 pipe,
+ u32 bit)
+{
+ void __iomem *addr;
+ u32 val;
+
+ addr = ldev->reg_base + offset + pipe * CRTC_PIPE_OFFSET;
+ val = readl(addr);
+ writel(val & ~bit, addr);
+}
+
+/* Helpers for chip detection */
+bool lsdc_is_ls2k2000(void);
+bool lsdc_is_ls2k1000(void);
+unsigned int loongson_cpu_get_prid(u8 *impl, u8 *rev);
+
+#endif
new file mode 100644
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <drm/drm_managed.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_output.h"
+
+/*
+ * ls7a_gpio_i2c_set - set the state of a gpio pin indicated by mask
+ * @mask: gpio pin mask
+ * @state: "0" for low, "1" for high
+ */
+static void ls7a_gpio_i2c_set(struct lsdc_i2c * const li2c, int mask, int state)
+{
+ struct lsdc_device *ldev = to_lsdc(li2c->ddev);
+ unsigned long flags;
+ u8 val;
+
+ spin_lock_irqsave(&ldev->reglock, flags);
+
+ if (state) {
+ /*
+ * Setting this pin as input directly, write 1 for Input.
+ * The external pull-up resistor will pull the level up
+ */
+ val = readb(li2c->dir_reg);
+ val |= mask;
+ writeb(val, li2c->dir_reg);
+ } else {
+ /* First set this pin as output, write 0 for Output */
+ val = readb(li2c->dir_reg);
+ val &= ~mask;
+ writeb(val, li2c->dir_reg);
+
+ /* Then, make this pin output 0 */
+ val = readb(li2c->dat_reg);
+ val &= ~mask;
+ writeb(val, li2c->dat_reg);
+ }
+
+ spin_unlock_irqrestore(&ldev->reglock, flags);
+}
+
+/*
+ * ls7a_gpio_i2c_get - read value back from the gpio pin indicated by mask
+ * @mask: gpio pin mask
+ * return "0" for low, "1" for high
+ */
+static int ls7a_gpio_i2c_get(struct lsdc_i2c * const li2c, int mask)
+{
+ struct lsdc_device *ldev = to_lsdc(li2c->ddev);
+ unsigned long flags;
+ u8 val;
+
+ spin_lock_irqsave(&ldev->reglock, flags);
+
+ /* First set this pin as input */
+ val = readb(li2c->dir_reg);
+ val |= mask;
+ writeb(val, li2c->dir_reg);
+
+ /* Then get level state from this pin */
+ val = readb(li2c->dat_reg);
+
+ spin_unlock_irqrestore(&ldev->reglock, flags);
+
+ return (val & mask) ? 1 : 0;
+}
+
+static void ls7a_i2c_set_sda(void *i2c, int state)
+{
+ struct lsdc_i2c * const li2c = (struct lsdc_i2c *)i2c;
+ /* set state on the li2c->sda pin */
+ return ls7a_gpio_i2c_set(li2c, li2c->sda, state);
+}
+
+static void ls7a_i2c_set_scl(void *i2c, int state)
+{
+ struct lsdc_i2c * const li2c = (struct lsdc_i2c *)i2c;
+ /* set state on the li2c->scl pin */
+ return ls7a_gpio_i2c_set(li2c, li2c->scl, state);
+}
+
+static int ls7a_i2c_get_sda(void *i2c)
+{
+ struct lsdc_i2c * const li2c = (struct lsdc_i2c *)i2c;
+ /* read value from the li2c->sda pin */
+ return ls7a_gpio_i2c_get(li2c, li2c->sda);
+}
+
+static int ls7a_i2c_get_scl(void *i2c)
+{
+ struct lsdc_i2c * const li2c = (struct lsdc_i2c *)i2c;
+ /* read the value from the li2c->scl pin */
+ return ls7a_gpio_i2c_get(li2c, li2c->scl);
+}
+
+static void lsdc_destroy_i2c(struct drm_device *ddev, void *data)
+{
+ struct lsdc_i2c *li2c = (struct lsdc_i2c *)data;
+
+ if (li2c) {
+ i2c_del_adapter(&li2c->adapter);
+ kfree(li2c);
+ }
+}
+
+/*
+ * The DC in ls7a1000/ls7a2000/ls2k2000 have builtin gpio hardware
+ *
+ * @base: gpio reg base
+ * @index: output channel index, 0 for DVO0, 1 for DVO1
+ */
+struct lsdc_i2c *lsdc_create_i2c_chan(struct drm_device *ddev,
+ void *base,
+ unsigned int index)
+{
+ struct i2c_adapter *adapter;
+ struct lsdc_i2c *li2c;
+ int ret;
+
+ li2c = kzalloc(sizeof(*li2c), GFP_KERNEL);
+ if (!li2c)
+ return ERR_PTR(-ENOMEM);
+
+ if (index == 0) {
+ li2c->sda = 0x01; /* pin 0 */
+ li2c->scl = 0x02; /* pin 1 */
+ } else if (index == 1) {
+ li2c->sda = 0x04; /* pin 2 */
+ li2c->scl = 0x08; /* pin 3 */
+ }
+
+ li2c->reg_base = base;
+ li2c->ddev = ddev;
+ li2c->dir_reg = li2c->reg_base + LS7A_DC_GPIO_DIR_REG;
+ li2c->dat_reg = li2c->reg_base + LS7A_DC_GPIO_DAT_REG;
+
+ li2c->bit.setsda = ls7a_i2c_set_sda;
+ li2c->bit.setscl = ls7a_i2c_set_scl;
+ li2c->bit.getsda = ls7a_i2c_get_sda;
+ li2c->bit.getscl = ls7a_i2c_get_scl;
+ li2c->bit.udelay = 5;
+ li2c->bit.timeout = usecs_to_jiffies(2200);
+ li2c->bit.data = li2c;
+
+ adapter = &li2c->adapter;
+ adapter->algo_data = &li2c->bit;
+ adapter->owner = THIS_MODULE;
+ adapter->class = I2C_CLASS_DDC;
+ adapter->dev.parent = ddev->dev;
+ adapter->nr = -1;
+
+ snprintf(adapter->name, sizeof(adapter->name), "lsdc-i2c%u", index);
+
+ i2c_set_adapdata(adapter, li2c);
+
+ ret = i2c_bit_add_bus(adapter);
+ if (ret) {
+ kfree(li2c);
+ return ERR_PTR(ret);
+ }
+
+ ret = drmm_add_action_or_reset(ddev, lsdc_destroy_i2c, li2c);
+ if (ret)
+ return NULL;
+
+ drm_info(ddev, "%s(sda pin mask=%u, scl pin mask=%u) created for connector-%u\n",
+ adapter->name, li2c->sda, li2c->scl, index);
+
+ return li2c;
+}
new file mode 100644
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <drm/drm_vblank.h>
+
+#include "lsdc_drv.h"
+
+/*
+ * For the DC in ls7a2000, clearing interrupt status is achieved by
+ * write "1" to LSDC_INT_REG, For the DC in ls7a1000, ls2k1000,
+ * Interrupt status clear is achieved by write "0" to LSDC_INT_REG.
+ * Two different hardware engineer of Loongson modify it as their will.
+ */
+
+static irqreturn_t ls7a2000_irq_handler(int irq, void *arg)
+{
+ struct drm_device *ddev = arg;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 val;
+
+ /* Read the interrupt status */
+ val = lsdc_rreg32(ldev, LSDC_INT_REG);
+ if ((val & INT_STATUS_MASK) == 0) {
+ drm_warn(ddev, "no interrupt occurs\n");
+ return IRQ_NONE;
+ }
+
+ ldev->irq_status = val;
+
+ /* write "1" to clear the interrupt status */
+ lsdc_wreg32(ldev, LSDC_INT_REG, val);
+
+ return IRQ_WAKE_THREAD;
+}
+
+/* For the DC in LS7A1000 and LS2K1000 etc */
+static irqreturn_t lsdc_irq_handler_legacy(int irq, void *arg)
+{
+ struct drm_device *ddev = arg;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 val;
+
+ /* Read the interrupt status */
+ val = lsdc_rreg32(ldev, LSDC_INT_REG);
+ if ((val & INT_STATUS_MASK) == 0) {
+ drm_warn(ddev, "no interrupt occurs\n");
+ return IRQ_NONE;
+ }
+
+ ldev->irq_status = val;
+
+ /* write "0" to clear the interrupt status */
+ lsdc_wreg32(ldev, LSDC_INT_REG, val & ~INT_STATUS_MASK);
+
+ return IRQ_WAKE_THREAD;
+}
+
+irq_handler_t lsdc_get_irq_handler(struct lsdc_device *ldev)
+{
+ const struct lsdc_desc *descp = ldev->descp;
+
+ if (descp->chip == CHIP_LS7A2000)
+ return ls7a2000_irq_handler;
+
+ return lsdc_irq_handler_legacy;
+}
+
+irqreturn_t lsdc_irq_thread_handler(int irq, void *arg)
+{
+ struct drm_device *ddev = arg;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct drm_crtc *crtc;
+
+ if (ldev->irq_status & INT_CRTC0_VSYNC) {
+ crtc = drm_crtc_from_index(ddev, 0);
+ drm_crtc_handle_vblank(crtc);
+ }
+
+ if (ldev->irq_status & INT_CRTC1_VSYNC) {
+ crtc = drm_crtc_from_index(ddev, 1);
+ drm_crtc_handle_vblank(crtc);
+ }
+
+ return IRQ_HANDLED;
+}
new file mode 100644
@@ -0,0 +1,568 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/delay.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_debugfs.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_file.h>
+#include <drm/drm_probe_helper.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_output.h"
+
+static int lsdc_get_modes(struct drm_connector *connector)
+{
+ unsigned int num = 0;
+ struct edid *edid;
+
+ if (connector->ddc) {
+ edid = drm_get_edid(connector, connector->ddc);
+ if (edid) {
+ drm_connector_update_edid_property(connector, edid);
+ num = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+ }
+
+ return num;
+ }
+
+ num = drm_add_modes_noedid(connector, 1920, 1200);
+
+ drm_set_preferred_mode(connector, 1024, 768);
+
+ return num;
+}
+
+static enum drm_connector_status
+lsdc_dpi_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct i2c_adapter *ddc = connector->ddc;
+
+ if (ddc) {
+ if (drm_probe_ddc(ddc))
+ return connector_status_connected;
+ } else {
+ if (connector->connector_type == DRM_MODE_CONNECTOR_DPI)
+ return connector_status_connected;
+ }
+
+ return connector_status_unknown;
+}
+
+static enum drm_connector_status
+ls7a2000_hdmi_vga_connector_detect_pipe0(struct drm_connector *connector, bool force)
+{
+ struct drm_device *ddev = connector->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 val;
+
+ val = lsdc_rreg32(ldev, LSDC_HDMI_HPD_STATUS_REG);
+
+ if (val & HDMI0_HPD_FLAG)
+ return connector_status_connected;
+
+ if (connector->ddc) {
+ if (drm_probe_ddc(connector->ddc))
+ return connector_status_connected;
+
+ return connector_status_disconnected;
+ }
+
+ return connector_status_unknown;
+}
+
+static enum drm_connector_status
+ls7a2000_hdmi_connector_detect_pipe1(struct drm_connector *connector, bool force)
+{
+ struct lsdc_device *ldev = to_lsdc(connector->dev);
+ u32 val;
+
+ val = lsdc_rreg32(ldev, LSDC_HDMI_HPD_STATUS_REG);
+
+ if (val & HDMI1_HPD_FLAG)
+ return connector_status_connected;
+
+ return connector_status_disconnected;
+}
+
+static struct drm_encoder *
+lsdc_connector_get_best_encoder(struct drm_connector *connector,
+ struct drm_atomic_state *state)
+{
+ struct lsdc_display_pipe *pipe = connector_to_display_pipe(connector);
+
+ return &pipe->encoder;
+}
+
+static const struct drm_connector_helper_funcs lsdc_connector_helpers = {
+ .atomic_best_encoder = lsdc_connector_get_best_encoder,
+ .get_modes = lsdc_get_modes,
+};
+
+#define LSDC_CONNECTOR_FUNS_GEN(pfn_detect) \
+ .detect = pfn_detect, \
+ .fill_modes = drm_helper_probe_single_connector_modes, \
+ .destroy = drm_connector_cleanup, \
+ .reset = drm_atomic_helper_connector_reset, \
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, \
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state
+
+static const struct drm_connector_funcs lsdc_dpi_connector_funcs = {
+ LSDC_CONNECTOR_FUNS_GEN(lsdc_dpi_connector_detect),
+};
+
+static const struct drm_connector_funcs
+ls7a2000_hdmi_connector_funcs_array[LSDC_NUM_CRTC] = {
+ {
+ LSDC_CONNECTOR_FUNS_GEN(ls7a2000_hdmi_vga_connector_detect_pipe0),
+ },
+ {
+ LSDC_CONNECTOR_FUNS_GEN(ls7a2000_hdmi_connector_detect_pipe1),
+ }
+};
+
+/* Even though some board has only one hdmi on display pipe 1,
+ * We still need hook lsdc_encoder_funcs up on display pipe 0,
+ * This is because we need its reset() callback get called, to
+ * set the LSDC_HDMIx_CTRL_REG using software gpio emulated i2c.
+ * Otherwise, the firmware may set LSDC_HDMIx_CTRL_REG blindly.
+ */
+static void ls7a2000_hdmi_encoder_reset(struct drm_encoder *encoder)
+{
+ struct drm_device *ddev = encoder->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct lsdc_display_pipe *dispipe = encoder_to_display_pipe(encoder);
+ unsigned int index = dispipe->index;
+ u32 val;
+
+ val = lsdc_hdmi_rreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index);
+ val &= ~HDMI_PHY_RESET_N;
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index, val);
+ udelay(9);
+ val |= HDMI_PHY_RESET_N;
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index, val);
+ udelay(9);
+
+ val = lsdc_hdmi_rreg32(ldev, LSDC_HDMI0_INTF_CTRL_REG, index);
+ val &= ~HW_I2C_EN;
+ val |= HDMI_INTERFACE_EN | HDMI_PACKET_EN;
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_INTF_CTRL_REG, index, val);
+
+ drm_dbg(ddev, "HDMI-%u Reset\n", index);
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+#define LSDC_HDMI_REG(i, reg) { \
+ .name = __stringify_1(LSDC_HDMI##i##_##reg##_REG), \
+ .offset = LSDC_HDMI##i##_##reg##_REG, \
+}
+
+static const struct debugfs_reg32 ls7a2000_hdmi_encoder_regs[][9] = {
+ {
+ LSDC_HDMI_REG(0, ZONE),
+ LSDC_HDMI_REG(0, INTF_CTRL),
+ LSDC_HDMI_REG(0, PHY_CTRL),
+ LSDC_HDMI_REG(0, PHY_PLL),
+ LSDC_HDMI_REG(0, AVI_INFO_CRTL),
+ LSDC_HDMI_REG(0, PHY_CAL),
+ LSDC_HDMI_REG(0, AUDIO_PLL_LO),
+ LSDC_HDMI_REG(0, AUDIO_PLL_HI),
+ {NULL, 0},
+ },
+ {
+ LSDC_HDMI_REG(1, ZONE),
+ LSDC_HDMI_REG(1, INTF_CTRL),
+ LSDC_HDMI_REG(1, PHY_CTRL),
+ LSDC_HDMI_REG(1, PHY_PLL),
+ LSDC_HDMI_REG(1, AVI_INFO_CRTL),
+ LSDC_HDMI_REG(1, PHY_CAL),
+ LSDC_HDMI_REG(1, AUDIO_PLL_LO),
+ LSDC_HDMI_REG(1, AUDIO_PLL_HI),
+ {NULL, 0}, /* MUST be {NULL, 0} terminated */
+ },
+};
+
+static int ls7a2000_hdmi_encoder_regs_show(struct seq_file *m, void *data)
+{
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
+ struct drm_device *ddev = node->minor->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ const struct debugfs_reg32 *preg;
+
+ preg = (const struct debugfs_reg32 *)node->info_ent->data;
+
+ while (preg->name) {
+ u32 offset = preg->offset;
+
+ seq_printf(m, "%s (0x%04x): 0x%08x\n", preg->name, offset,
+ lsdc_rreg32(ldev, offset));
+ ++preg;
+ }
+
+ return 0;
+}
+
+static const struct drm_info_list ls7a2000_hdmi_debugfs_files[] = {
+ { "hdmi0_regs", ls7a2000_hdmi_encoder_regs_show, 0, (void *)ls7a2000_hdmi_encoder_regs[0] },
+ { "hdmi1_regs", ls7a2000_hdmi_encoder_regs_show, 0, (void *)ls7a2000_hdmi_encoder_regs[1] },
+};
+
+static int ls7a2000_hdmi_encoder_late_register(struct drm_encoder *encoder)
+{
+ struct lsdc_display_pipe *dispipe = encoder_to_display_pipe(encoder);
+ struct drm_device *ddev = encoder->dev;
+ struct drm_minor *minor = ddev->primary;
+
+ drm_debugfs_create_files(&ls7a2000_hdmi_debugfs_files[dispipe->index],
+ 1, minor->debugfs_root, minor);
+
+ return 0;
+}
+
+#endif
+
+static const struct drm_encoder_funcs ls7a1000_encoder_funcs = {
+ .destroy = drm_encoder_cleanup,
+};
+
+static const struct drm_encoder_funcs ls7a2000_encoder_funcs = {
+ .reset = ls7a2000_hdmi_encoder_reset,
+ .destroy = drm_encoder_cleanup,
+#ifdef CONFIG_DEBUG_FS
+ .late_register = ls7a2000_hdmi_encoder_late_register,
+#endif
+};
+
+static int ls7a2000_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
+ struct drm_display_mode *mode)
+{
+ struct lsdc_display_pipe *dispipe = encoder_to_display_pipe(encoder);
+ struct drm_device *ddev = encoder->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ unsigned int index = dispipe->index;
+ struct hdmi_avi_infoframe infoframe;
+ u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
+ unsigned char *ptr = &buffer[HDMI_INFOFRAME_HEADER_SIZE];
+ unsigned int content0, content1, content2, content3;
+ int err;
+
+ err = drm_hdmi_avi_infoframe_from_display_mode(&infoframe, &dispipe->connector, mode);
+ if (err < 0) {
+ drm_err(ddev, "failed to setup AVI infoframe: %d\n", err);
+ return err;
+ }
+
+ /* Fixed infoframe configuration not linked to the mode */
+ infoframe.colorspace = HDMI_COLORSPACE_RGB;
+ infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
+ infoframe.colorimetry = HDMI_COLORIMETRY_NONE;
+
+ err = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
+ if (err < 0) {
+ drm_err(ddev, "failed to pack AVI infoframe: %d\n", err);
+ return err;
+ }
+
+ content0 = *(unsigned int *)ptr;
+ content1 = *(ptr + 4);
+ content2 = *(unsigned int *)(ptr + 5);
+ content3 = *(unsigned int *)(ptr + 9);
+
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT0, index, content0);
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT1, index, content1);
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT2, index, content2);
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_AVI_CONTENT3, index, content3);
+
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_AVI_INFO_CRTL_REG, index,
+ AVI_PKT_ENABLE | AVI_PKT_UPDATE);
+
+ drm_dbg(ddev, "Update HDMI-%u avi infoframe\n", index);
+
+ return 0;
+}
+
+static void ls7a2000_hdmi_atomic_disable(struct drm_encoder *encoder,
+ struct drm_atomic_state *state)
+{
+ struct lsdc_display_pipe *dispipe = encoder_to_display_pipe(encoder);
+ struct drm_device *ddev = encoder->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ unsigned int index = dispipe->index;
+ u32 val;
+
+ val = lsdc_hdmi_rreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index);
+ val &= ~HDMI_PHY_EN;
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index, val);
+
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_AVI_INFO_CRTL_REG, index, 0);
+
+ drm_dbg(ddev, "HDMI-%u disabled\n", index);
+}
+
+static void ls7a2000_hdmi_atomic_enable(struct drm_encoder *encoder,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = encoder->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct lsdc_display_pipe *dispipe = encoder_to_display_pipe(encoder);
+ unsigned int index = dispipe->index;
+ u32 val;
+
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_ZONE_REG, index, 0x00400040);
+
+ val = lsdc_hdmi_rreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index);
+
+ val |= HDMI_PHY_TERM_STATUS |
+ HDMI_PHY_TERM_DET_EN |
+ HDMI_PHY_TERM_H_EN |
+ HDMI_PHY_TERM_L_EN |
+ HDMI_PHY_EN;
+
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_PHY_CTRL_REG, index, val);
+
+ val = HDMI_CTL_PERIOD_MODE |
+ HDMI_AUDIO_EN |
+ HDMI_PACKET_EN |
+ HDMI_INTERFACE_EN |
+ (8 << HDMI_VIDEO_PREAMBLE_SHIFT);
+
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_INTF_CTRL_REG, index, val);
+
+ drm_dbg(ddev, "HDMI-%u enabled\n", index);
+}
+
+/*
+ * Fout = M * Fin
+ *
+ * M = (4 * LF) / (IDF * ODF)
+ *
+ * IDF: Input Division Factor
+ * ODF: Output Division Factor
+ * LF: Loop Factor
+ * M: Required Mult
+ *
+ * +--------------------------------------------------------+
+ * | Fin (kHZ) | M | IDF | LF | ODF | Fout(Mhz) |
+ * |-------------------+----+-----+----+-----+--------------|
+ * | 170000 ~ 340000 | 10 | 16 | 40 | 1 | 1700 ~ 3400 |
+ * | 85000 ~ 170000 | 10 | 8 | 40 | 2 | 850 ~ 1700 |
+ * | 42500 ~ 85000 | 10 | 4 | 40 | 4 | 425 ~ 850 |
+ * | 21250 ~ 42500 | 10 | 2 | 40 | 8 | 212.5 ~ 425 |
+ * | 20000 ~ 21250 | 10 | 1 | 40 | 16 | 200 ~ 212.5 |
+ * +--------------------------------------------------------+
+ */
+static void ls7a2000_hdmi_phy_pll_config(struct lsdc_device *ldev,
+ int fin,
+ unsigned int index)
+{
+ struct drm_device *ddev = &ldev->base;
+ int count = 0;
+ u32 val;
+
+ /* Firstly, disable phy pll */
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, index, 0x0);
+
+ /*
+ * Most of time, loongson HDMI require M = 10
+ * for example, 10 = (4 * 40) / (8 * 2)
+ * here, write "1" to the ODF will get "2"
+ */
+
+ if (fin >= 170000)
+ val = (16 << HDMI_PLL_IDF_SHIFT) |
+ (40 << HDMI_PLL_LF_SHIFT) |
+ (0 << HDMI_PLL_ODF_SHIFT);
+ else if (fin >= 85000)
+ val = (8 << HDMI_PLL_IDF_SHIFT) |
+ (40 << HDMI_PLL_LF_SHIFT) |
+ (1 << HDMI_PLL_ODF_SHIFT);
+ else if (fin >= 42500)
+ val = (4 << HDMI_PLL_IDF_SHIFT) |
+ (40 << HDMI_PLL_LF_SHIFT) |
+ (2 << HDMI_PLL_ODF_SHIFT);
+ else if (fin >= 21250)
+ val = (2 << HDMI_PLL_IDF_SHIFT) |
+ (40 << HDMI_PLL_LF_SHIFT) |
+ (3 << HDMI_PLL_ODF_SHIFT);
+ else
+ val = (1 << HDMI_PLL_IDF_SHIFT) |
+ (40 << HDMI_PLL_LF_SHIFT) |
+ (4 << HDMI_PLL_ODF_SHIFT);
+
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, index, val | HDMI_PLL_ENABLE);
+
+ udelay(1);
+
+ drm_dbg(ddev, "Fin of HDMI-%u: %d kHz\n", index, fin);
+
+ /* Wait hdmi phy pll lock */
+ do {
+ val = lsdc_hdmi_rreg32(ldev, LSDC_HDMI0_PHY_PLL_REG, index);
+
+ if (val & HDMI_PLL_LOCKED) {
+ drm_dbg(ddev, "Setting HDMI-%u PLL take %d cycles\n",
+ index, count);
+ break;
+ }
+ ++count;
+ } while (count < 1000);
+
+ lsdc_hdmi_wreg32(ldev, LSDC_HDMI0_PHY_CAL_REG, index, 0xf000ff0);
+
+ if (count >= 1000)
+ drm_err(ddev, "Setting HDMI-%u PLL failed\n", index);
+}
+
+static void ls7a2000_hdmi_atomic_mode_set(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct lsdc_display_pipe *dispipe = encoder_to_display_pipe(encoder);
+ struct drm_device *ddev = encoder->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct drm_display_mode *mode = &crtc_state->mode;
+
+ ls7a2000_hdmi_phy_pll_config(ldev, mode->clock, dispipe->index);
+
+ ls7a2000_hdmi_set_avi_infoframe(encoder, mode);
+
+ drm_dbg(ddev, "HDMI-%u modeset finished\n", dispipe->index);
+}
+
+const struct drm_encoder_helper_funcs ls7a2000_hdmi_encoder_helper_funcs = {
+ .atomic_disable = ls7a2000_hdmi_atomic_disable,
+ .atomic_enable = ls7a2000_hdmi_atomic_enable,
+ .atomic_mode_set = ls7a2000_hdmi_atomic_mode_set,
+};
+
+/*
+ * For LS7A2000:
+ *
+ * 1) Some board export double hdmi output interface
+ * 2) Most of board export one vga + hdmi output interface
+ * 3) Still have boards export three output(2 hdmi + 1 vga).
+ *
+ * So let's hook hdmi helper funcs to all display pipe, don't miss.
+ * writing hdmi register do no harm, except wasting a few cpu's time
+ * on the case which the motherboard don't export hdmi interface on
+ * display pipe 0.
+ */
+static int ls7a2000_output_init(struct lsdc_device *ldev,
+ struct lsdc_display_pipe *dispipe,
+ struct i2c_adapter *ddc)
+{
+ struct drm_device *ddev = &ldev->base;
+ struct drm_encoder *encoder = &dispipe->encoder;
+ struct drm_connector *connector = &dispipe->connector;
+ unsigned int pipe = dispipe->index;
+ int ret;
+
+ ret = drm_encoder_init(ddev,
+ encoder,
+ &ls7a2000_encoder_funcs,
+ DRM_MODE_ENCODER_TMDS,
+ "encoder-%u",
+ pipe);
+ if (ret)
+ return ret;
+
+ encoder->possible_crtcs = BIT(pipe);
+
+ drm_encoder_helper_add(encoder, &ls7a2000_hdmi_encoder_helper_funcs);
+
+ ret = drm_connector_init_with_ddc(ddev,
+ connector,
+ &ls7a2000_hdmi_connector_funcs_array[pipe],
+ DRM_MODE_CONNECTOR_HDMIA,
+ ddc);
+ if (ret)
+ return ret;
+
+ drm_info(ddev, "display pipe-%u has HDMI%s\n", pipe, pipe ? "" : " and/or VGA");
+
+ drm_connector_helper_add(connector, &lsdc_connector_helpers);
+
+ drm_connector_attach_encoder(connector, encoder);
+
+ connector->polled = DRM_CONNECTOR_POLL_CONNECT |
+ DRM_CONNECTOR_POLL_DISCONNECT;
+
+ connector->interlace_allowed = 0;
+ connector->doublescan_allowed = 0;
+
+ return 0;
+}
+
+static int ls7a1000_output_init(struct lsdc_device *ldev,
+ struct lsdc_display_pipe *dispipe,
+ struct i2c_adapter *ddc)
+{
+ struct drm_device *ddev = &ldev->base;
+ struct drm_encoder *encoder = &dispipe->encoder;
+ struct drm_connector *connector = &dispipe->connector;
+ int ret;
+
+ ret = drm_encoder_init(ddev,
+ encoder,
+ &ls7a1000_encoder_funcs,
+ DRM_MODE_ENCODER_TMDS,
+ "encoder-%u",
+ dispipe->index);
+ if (ret)
+ return ret;
+
+ encoder->possible_crtcs = BIT(dispipe->index);
+
+ ret = drm_connector_init_with_ddc(ddev,
+ connector,
+ &lsdc_dpi_connector_funcs,
+ DRM_MODE_CONNECTOR_DPI,
+ ddc);
+ if (ret)
+ return ret;
+
+ drm_info(ddev, "display pipe-%u has DVO\n", dispipe->index);
+
+ drm_connector_helper_add(connector, &lsdc_connector_helpers);
+
+ drm_connector_attach_encoder(connector, encoder);
+
+ connector->polled = DRM_CONNECTOR_POLL_CONNECT |
+ DRM_CONNECTOR_POLL_DISCONNECT;
+
+ connector->interlace_allowed = 0;
+ connector->doublescan_allowed = 0;
+
+ return 0;
+}
+
+typedef int (*pfn_output_init_t)(struct lsdc_device *ldev,
+ struct lsdc_display_pipe *disp,
+ struct i2c_adapter *ddc);
+
+/* NOTE: keep this as the order listed in loongson_chip_family enum */
+static const pfn_output_init_t lsdc_output_init[CHIP_LAST] = {
+ ls7a1000_output_init,
+ ls7a2000_output_init,
+};
+
+int lsdc_create_output(struct lsdc_device *ldev,
+ struct lsdc_display_pipe *dispipe)
+{
+ const struct lsdc_desc *descp = ldev->descp;
+ struct i2c_adapter *ddc = NULL;
+ struct lsdc_i2c *li2c;
+
+ if (descp->has_builtin_i2c) {
+ li2c = lsdc_create_i2c_chan(&ldev->base, ldev->reg_base, dispipe->index);
+ if (IS_ERR(li2c))
+ return PTR_ERR(li2c);
+
+ dispipe->li2c = li2c;
+ ddc = &li2c->adapter;
+ }
+
+ /* Output interfaces suffer from changes */
+ return lsdc_output_init[descp->chip](ldev, dispipe, ddc);
+}
new file mode 100644
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __LSDC_OUTPUT_H__
+#define __LSDC_OUTPUT_H__
+
+#include "lsdc_drv.h"
+
+int lsdc_create_output(struct lsdc_device *ldev, struct lsdc_display_pipe *p);
+
+struct lsdc_i2c *lsdc_create_i2c_chan(struct drm_device *ddev,
+ void *base,
+ unsigned int index);
+
+#endif
new file mode 100644
@@ -0,0 +1,431 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_plane_helper.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_regs.h"
+#include "lsdc_ttm.h"
+
+static const u32 lsdc_primary_formats[] = {
+ DRM_FORMAT_XRGB8888,
+};
+
+static const u32 lsdc_cursor_formats[] = {
+ DRM_FORMAT_ARGB8888,
+};
+
+static const u64 lsdc_fb_format_modifiers[] = {
+ DRM_FORMAT_MOD_LINEAR,
+ DRM_FORMAT_MOD_INVALID
+};
+
+static unsigned int lsdc_get_fb_offset(struct drm_framebuffer *fb,
+ struct drm_plane_state *state,
+ unsigned int plane)
+{
+ unsigned int offset = fb->offsets[plane];
+
+ offset += fb->format->cpp[plane] * (state->src_x >> 16);
+ offset += fb->pitches[plane] * (state->src_y >> 16);
+
+ return offset;
+}
+
+static int lsdc_check_cursor_plane(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+ struct drm_crtc *crtc = new_plane_state->crtc;
+ struct drm_crtc_state *new_crtc_state;
+
+ if (!crtc)
+ return 0;
+
+ new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+ return drm_atomic_helper_check_plane_state(new_plane_state,
+ new_crtc_state,
+ DRM_PLANE_NO_SCALING,
+ DRM_PLANE_NO_SCALING,
+ true,
+ true);
+}
+
+static int lsdc_check_primary_plane(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+ struct drm_crtc *crtc = new_plane_state->crtc;
+ struct drm_crtc_state *new_crtc_state;
+
+ if (!crtc)
+ return 0;
+
+ new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+ return drm_atomic_helper_check_plane_state(new_plane_state,
+ new_crtc_state,
+ DRM_PLANE_NO_SCALING,
+ DRM_PLANE_NO_SCALING,
+ false,
+ true);
+}
+
+static void lsdc_update_primary_plane(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = plane->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+ struct drm_crtc *crtc = new_plane_state->crtc;
+ struct drm_framebuffer *fb = new_plane_state->fb;
+ struct ttm_buffer_object *tbo = to_ttm_bo(fb->obj[0]);
+ unsigned int pipe = drm_crtc_index(crtc);
+ unsigned int fb_offset = lsdc_get_fb_offset(fb, new_plane_state, 0);
+ u64 bo_offset = lsdc_bo_gpu_offset(tbo);
+ u64 fb_addr = ldev->vram_base + bo_offset + fb_offset;
+ u32 stride = fb->pitches[0];
+ u32 cfg;
+ u32 lo, hi;
+
+ if (IS_ERR((void *)bo_offset)) {
+ drm_warn(ddev, "bo not pinned, should not happen\n");
+ return;
+ }
+
+ /* 40-bit width physical address bus */
+ lo = fb_addr & 0xFFFFFFFF;
+ hi = (fb_addr >> 32) & 0xFF;
+
+ cfg = lsdc_crtc_rreg32(ldev, LSDC_CRTC0_CFG_REG, pipe);
+ if (cfg & CFG_FB_IN_USING) {
+ drm_dbg(ddev, "CRTC-%u(FB1) is in using\n", pipe);
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_FB1_LO_ADDR_REG, pipe, lo);
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_FB1_HI_ADDR_REG, pipe, hi);
+ } else {
+ drm_dbg(ddev, "CRTC-%u(FB0) is in using\n", pipe);
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_FB0_LO_ADDR_REG, pipe, lo);
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_FB0_HI_ADDR_REG, pipe, hi);
+ }
+
+ drm_dbg(ddev, "CRTC-%u scanout from 0x%llx\n", pipe, fb_addr);
+
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_STRIDE_REG, pipe, stride);
+
+ cfg &= ~CFG_PIX_FMT_MASK;
+ cfg |= LSDC_PF_XRGB8888;
+
+ lsdc_crtc_wreg32(ldev, LSDC_CRTC0_CFG_REG, pipe, cfg);
+}
+
+static void lsdc_disable_primary_plane(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ /* Do nothing, just prevent call into atomic_update().
+ * Writing the format as LSDC_PF_NONE can disable the primary,
+ * But it seems not necessary...
+ */
+ drm_dbg(plane->dev, "%s disabled\n", plane->name);
+}
+
+static void lsdc_ttm_cleanup_fb(struct drm_plane *plane,
+ struct drm_plane_state *state,
+ unsigned int np)
+{
+ struct drm_gem_object *obj;
+ struct drm_framebuffer *fb = state->fb;
+
+ while (np) {
+ --np;
+ obj = fb->obj[np];
+ if (!obj) {
+ drm_err(plane->dev, "%s: no obj\n", plane->name);
+ continue;
+ }
+ lsdc_bo_unpin(obj);
+ }
+}
+
+static int lsdc_plane_prepare_fb(struct drm_plane *plane,
+ struct drm_plane_state *new_state)
+{
+ struct drm_framebuffer *fb = new_state->fb;
+ struct ttm_buffer_object *tbo;
+ struct drm_gem_object *obj;
+ unsigned int i;
+ int ret;
+
+ if (!fb)
+ return 0;
+
+ for (i = 0; i < fb->format->num_planes; ++i) {
+ obj = fb->obj[i];
+ if (!obj) {
+ ret = -EINVAL;
+ goto err_ret;
+ }
+ tbo = to_ttm_bo(obj);
+
+ lsdc_bo_set_placement(tbo, LSDC_GEM_DOMAIN_VRAM, TTM_PL_FLAG_CONTIGUOUS);
+
+ ret = lsdc_bo_pin(obj);
+ if (ret)
+ goto err_ret;
+ }
+
+ ret = drm_gem_plane_helper_prepare_fb(plane, new_state);
+ if (ret)
+ goto err_ret;
+
+ return 0;
+
+err_ret:
+ lsdc_ttm_cleanup_fb(plane, new_state, i);
+ return ret;
+}
+
+static void lsdc_plane_cleanup_fb(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct drm_framebuffer *fb = old_state->fb;
+
+ if (!fb)
+ return;
+
+ lsdc_ttm_cleanup_fb(plane, old_state, fb->format->num_planes);
+}
+
+static const struct drm_plane_helper_funcs lsdc_primary_plane_helpers = {
+ .prepare_fb = lsdc_plane_prepare_fb,
+ .cleanup_fb = lsdc_plane_cleanup_fb,
+ .atomic_check = lsdc_check_primary_plane,
+ .atomic_update = lsdc_update_primary_plane,
+ .atomic_disable = lsdc_disable_primary_plane,
+};
+
+/*
+ * Update location, format, enable and disable state of the cursor,
+ * For those who have two hardware cursor, cursor 0 is attach it to CRTC-0,
+ * cursor 1 is attached to CRTC-1. Compositing the primary and cursor plane
+ * is automatically done by hardware, the cursor is alway on the top of the
+ * primary, there is no depth property can be set, pretty convenient.
+ */
+static void ls7a1000_atomic_update_cursor(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = plane->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct lsdc_display_pipe *dispipe = cursor_to_display_pipe(plane);
+ struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+ struct drm_framebuffer *cursor_fb = new_plane_state->fb;
+ struct ttm_buffer_object *tbo = to_ttm_bo(cursor_fb->obj[0]);
+ u64 addr = ldev->vram_base + lsdc_bo_gpu_offset(tbo);
+ u32 cfg = CURSOR_FORMAT_ARGB8888;
+ int x = new_plane_state->crtc_x;
+ int y = new_plane_state->crtc_y;
+
+ if (x < 0)
+ x = 0;
+
+ if (y < 0)
+ y = 0;
+
+ lsdc_wreg32(ldev, LSDC_CURSOR0_POSITION_REG, (y << 16) | x);
+
+ lsdc_wreg32(ldev, LSDC_CURSOR0_ADDR_HI_REG, (addr >> 32) & 0xFF);
+ lsdc_wreg32(ldev, LSDC_CURSOR0_ADDR_LO_REG, addr);
+
+ /*
+ * If bit 4(CURSOR_LOCATION) of LSDC_CURSOR0_CFG_REG is 1, cursor will
+ * be locate at CRTC-1, if bit 4 of LSDC_CURSOR0_CFG_REG is 0, cursor
+ * will be locate at CRTC-0. For the old device we made the single hw
+ * cursor shared by two CRTC. Switch to software cursor is also ok.
+ */
+ lsdc_wreg32(ldev, LSDC_CURSOR0_CFG_REG, dispipe->index ? cfg | CURSOR_LOCATION : cfg);
+}
+
+static void ls7a1000_atomic_disable_cursor(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = plane->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 cfg;
+
+ cfg = lsdc_rreg32(ldev, LSDC_CURSOR0_CFG_REG);
+ /* write 0 to cursor format bits, it will be invisiable */
+ cfg &= ~CURSOR_FORMAT_MASK;
+ lsdc_wreg32(ldev, LSDC_CURSOR0_CFG_REG, cfg);
+}
+
+static const struct drm_plane_helper_funcs ls7a1000_plane_helper_cursors = {
+ .prepare_fb = lsdc_plane_prepare_fb,
+ .cleanup_fb = lsdc_plane_cleanup_fb,
+ .atomic_check = lsdc_check_cursor_plane,
+ .atomic_update = ls7a1000_atomic_update_cursor,
+ .atomic_disable = ls7a1000_atomic_disable_cursor,
+};
+
+/* update the format, size and location of the cursor */
+static void lsdc_atomic_update_cursor0(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = plane->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+ struct drm_framebuffer *cursor_fb = new_plane_state->fb;
+ struct ttm_buffer_object *tbo = to_ttm_bo(cursor_fb->obj[0]);
+ u64 addr = ldev->vram_base + lsdc_bo_gpu_offset(tbo);
+ u32 cfg = CURSOR_FORMAT_ARGB8888 | CURSOR_SIZE_64X64;
+ int x = new_plane_state->crtc_x;
+ int y = new_plane_state->crtc_y;
+
+ if (x < 0)
+ x = 0;
+
+ if (y < 0)
+ y = 0;
+
+ lsdc_wreg32(ldev, LSDC_CURSOR0_POSITION_REG, (y << 16) | x);
+
+ lsdc_wreg32(ldev, LSDC_CURSOR0_ADDR_HI_REG, (addr >> 32) & 0xFF);
+ lsdc_wreg32(ldev, LSDC_CURSOR0_ADDR_LO_REG, addr);
+
+ lsdc_wreg32(ldev, LSDC_CURSOR0_CFG_REG, cfg & ~CURSOR_LOCATION);
+}
+
+/* update the format, size and location of the cursor */
+static void lsdc_atomic_update_cursor1(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = plane->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane);
+ struct drm_framebuffer *cursor_fb = new_plane_state->fb;
+ struct ttm_buffer_object *tbo = to_ttm_bo(cursor_fb->obj[0]);
+ u64 addr = ldev->vram_base + lsdc_bo_gpu_offset(tbo);
+ u32 cfg = CURSOR_FORMAT_ARGB8888 | CURSOR_SIZE_64X64;
+ int x = new_plane_state->crtc_x;
+ int y = new_plane_state->crtc_y;
+
+ if (x < 0)
+ x = 0;
+
+ if (y < 0)
+ y = 0;
+
+ lsdc_wreg32(ldev, LSDC_CURSOR1_POSITION_REG, (y << 16) | x);
+
+ lsdc_wreg32(ldev, LSDC_CURSOR1_ADDR_HI_REG, (addr >> 32) & 0xFF);
+ lsdc_wreg32(ldev, LSDC_CURSOR1_ADDR_LO_REG, addr);
+
+ lsdc_wreg32(ldev, LSDC_CURSOR1_CFG_REG, cfg | CURSOR_LOCATION);
+}
+
+static void lsdc_atomic_disable_cursor0(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = plane->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 cfg;
+
+ cfg = lsdc_rreg32(ldev, LSDC_CURSOR0_CFG_REG);
+ /* write 0 to cursor format bits, it will be invisiable */
+ cfg &= ~CURSOR_FORMAT_MASK;
+ lsdc_wreg32(ldev, LSDC_CURSOR0_CFG_REG, cfg);
+}
+
+static void lsdc_atomic_disable_cursor1(struct drm_plane *plane,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *ddev = plane->dev;
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ u32 cfg;
+
+ cfg = lsdc_rreg32(ldev, LSDC_CURSOR1_CFG_REG);
+ /* write 0 to cursor format bits, it will be invisiable */
+ cfg &= ~CURSOR_FORMAT_MASK;
+ lsdc_wreg32(ldev, LSDC_CURSOR1_CFG_REG, cfg);
+}
+
+/* for ls7a2000 */
+static const struct drm_plane_helper_funcs lsdc_plane_helper_cursors[2] = {
+ {
+ .prepare_fb = lsdc_plane_prepare_fb,
+ .cleanup_fb = lsdc_plane_cleanup_fb,
+ .atomic_check = lsdc_check_cursor_plane,
+ .atomic_update = lsdc_atomic_update_cursor0,
+ .atomic_disable = lsdc_atomic_disable_cursor0,
+ },
+ {
+ .prepare_fb = lsdc_plane_prepare_fb,
+ .cleanup_fb = lsdc_plane_cleanup_fb,
+ .atomic_check = lsdc_check_cursor_plane,
+ .atomic_update = lsdc_atomic_update_cursor1,
+ .atomic_disable = lsdc_atomic_disable_cursor1,
+ }
+};
+
+static const struct drm_plane_funcs lsdc_plane_funcs = {
+ .update_plane = drm_atomic_helper_update_plane,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .destroy = drm_plane_cleanup,
+ .reset = drm_atomic_helper_plane_reset,
+ .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+int lsdc_primary_plane_init(struct lsdc_device *ldev,
+ struct drm_plane *plane,
+ unsigned int index)
+{
+ int ret;
+
+ ret = drm_universal_plane_init(&ldev->base,
+ plane,
+ 1 << index,
+ &lsdc_plane_funcs,
+ lsdc_primary_formats,
+ ARRAY_SIZE(lsdc_primary_formats),
+ lsdc_fb_format_modifiers,
+ DRM_PLANE_TYPE_PRIMARY,
+ "primary-%u", index);
+ if (ret)
+ return ret;
+
+ drm_plane_helper_add(plane, &lsdc_primary_plane_helpers);
+
+ return 0;
+}
+
+int lsdc_cursor_plane_init(struct lsdc_device *ldev,
+ struct drm_plane *plane,
+ unsigned int index)
+{
+ const struct lsdc_desc *descp = ldev->descp;
+ int ret;
+
+ ret = drm_universal_plane_init(&ldev->base,
+ plane,
+ 1 << index,
+ &lsdc_plane_funcs,
+ lsdc_cursor_formats,
+ ARRAY_SIZE(lsdc_cursor_formats),
+ lsdc_fb_format_modifiers,
+ DRM_PLANE_TYPE_CURSOR,
+ "cursor-%u",
+ index);
+ if (ret)
+ return ret;
+
+ /* The hw cursor become standard from ls7a2000(including ls2k2000) */
+ if (descp->chip == CHIP_LS7A2000)
+ drm_plane_helper_add(plane, &lsdc_plane_helper_cursors[index]);
+ else
+ drm_plane_helper_add(plane, &ls7a1000_plane_helper_cursors);
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,338 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/delay.h>
+
+#include "lsdc_drv.h"
+
+/*
+ * The structure of the pixel PLL register is evolved with times.
+ * All loongson's cpu is little endian.
+ */
+
+/* u64 */
+struct ls7a1000_pixpll_bitmap {
+ /* Byte 0 ~ Byte 3 */
+ unsigned div_out : 7; /* 0 : 6 output clock divider */
+ unsigned __1 : 14; /* 7 : 20 */
+ unsigned loopc : 9; /* 21 : 29 clock multiplier */
+ unsigned __2 : 2; /* 30 : 31 */
+
+ /* Byte 4 ~ Byte 7 */
+ unsigned div_ref : 7; /* 0 : 6 input clock divider */
+ unsigned locked : 1; /* 7 PLL locked status */
+ unsigned sel_out : 1; /* 8 output clk selector */
+ unsigned __3 : 2; /* 9 : 10 */
+ unsigned set_param : 1; /* 11 trigger the update */
+ unsigned bypass : 1; /* 12 */
+ unsigned powerdown : 1; /* 13 */
+ unsigned __4 : 18; /* 14 : 31 */
+};
+
+union lsdc_pixpll_bitmap {
+ struct ls7a1000_pixpll_bitmap ls7a1000;
+ u32 dword[4];
+};
+
+struct pixclk_to_pll_parm {
+ /* kHz */
+ unsigned int clock;
+
+ unsigned short width;
+ unsigned short height;
+ unsigned short vrefresh;
+
+ /* Stores parameters for programming the Hardware PLLs */
+ unsigned short div_out;
+ unsigned short loopc;
+ unsigned short div_ref;
+};
+
+/*
+ * Pixel clock to PLL parameters translation table.
+ * Small static cached value to speed up PLL parameters calculation.
+ */
+static const struct pixclk_to_pll_parm pll_param_table[] = {
+ {148500, 1920, 1080, 60, 11, 49, 3}, /* 1920x1080@60Hz */
+ /* 1920x1080@50Hz */
+ {174500, 1920, 1080, 75, 17, 89, 3}, /* 1920x1080@75Hz */
+ {181250, 2560, 1080, 75, 8, 58, 4}, /* 2560x1080@75Hz */
+ {297000, 2560, 1080, 30, 8, 95, 4}, /* 3840x2160@30Hz */
+ {301992, 1920, 1080, 100, 10, 151, 5}, /* 1920x1080@100Hz */
+ {146250, 1680, 1050, 60, 16, 117, 5}, /* 1680x1050@60Hz */
+ {135000, 1280, 1024, 75, 10, 54, 4}, /* 1280x1024@75Hz */
+ {119000, 1680, 1050, 60, 20, 119, 5}, /* 1680x1050@60Hz */
+ {108000, 1600, 900, 60, 15, 81, 5}, /* 1600x900@60Hz */
+ /* 1280x1024@60Hz */
+ /* 1280x960@60Hz */
+ /* 1152x864@75Hz */
+
+ {106500, 1440, 900, 60, 19, 81, 4}, /* 1440x900@60Hz */
+ {88750, 1440, 900, 60, 16, 71, 5}, /* 1440x900@60Hz */
+ {83500, 1280, 800, 60, 17, 71, 5}, /* 1280x800@60Hz */
+ {71000, 1280, 800, 60, 20, 71, 5}, /* 1280x800@60Hz */
+
+ {74250, 1280, 720, 60, 22, 49, 3}, /* 1280x720@60Hz */
+ /* 1280x720@50Hz */
+
+ {78750, 1024, 768, 75, 16, 63, 5}, /* 1024x768@75Hz */
+ {75000, 1024, 768, 70, 29, 87, 4}, /* 1024x768@70Hz */
+ {65000, 1024, 768, 60, 20, 39, 3}, /* 1024x768@60Hz */
+
+ {51200, 1024, 600, 60, 25, 64, 5}, /* 1024x600@60Hz */
+
+ {57284, 832, 624, 75, 24, 55, 4}, /* 832x624@75Hz */
+ {49500, 800, 600, 75, 40, 99, 5}, /* 800x600@75Hz */
+ {50000, 800, 600, 72, 44, 88, 4}, /* 800x600@72Hz */
+ {40000, 800, 600, 60, 30, 36, 3}, /* 800x600@60Hz */
+ {36000, 800, 600, 56, 50, 72, 4}, /* 800x600@56Hz */
+ {31500, 640, 480, 75, 40, 63, 5}, /* 640x480@75Hz */
+ /* 640x480@73Hz */
+
+ {30240, 640, 480, 67, 62, 75, 4}, /* 640x480@67Hz */
+ {27000, 720, 576, 50, 50, 54, 4}, /* 720x576@60Hz */
+ {25175, 640, 480, 60, 85, 107, 5}, /* 640x480@60Hz */
+ {25200, 640, 480, 60, 50, 63, 5}, /* 640x480@60Hz */
+ /* 720x480@60Hz */
+};
+
+/*
+ * lsdc_pixpll_setup - ioremap the device dependent PLL registers
+ *
+ * @this: point to the object where this function is called from
+ */
+static int lsdc_pixpll_setup(struct lsdc_pll * const this)
+{
+ this->mmio = ioremap(this->reg_base, this->reg_size);
+
+ return 0;
+}
+
+/*
+ * Find a set of pll parameters from a static local table which avoid
+ * computing the pll parameter eachtime a modeset is triggered.
+ *
+ * @this: point to the object where this function is called from
+ * @clock: the desired output pixel clock, the unit is kHz
+ * @pout: point to where the parameters to store if found
+ *
+ * Return 0 if success, return -1 if not found.
+ */
+static int lsdc_pixpll_find(struct lsdc_pll * const this,
+ unsigned int clock,
+ struct lsdc_pll_parms *pout)
+{
+ unsigned int num = ARRAY_SIZE(pll_param_table);
+ unsigned int i;
+
+ for (i = 0; i < num; ++i) {
+ if (clock != pll_param_table[i].clock)
+ continue;
+
+ pout->div_ref = pll_param_table[i].div_ref;
+ pout->loopc = pll_param_table[i].loopc;
+ pout->div_out = pll_param_table[i].div_out;
+
+ return 0;
+ }
+
+ drm_dbg(this->ddev, "pixel clock %u: miss\n", clock);
+
+ return -1;
+}
+
+/*
+ * Find a set of pll parameters which have minimal difference with the
+ * desired pixel clock frequency. It does that by computing all of the
+ * possible combination. Compute the diff and find the combination with
+ * minimal diff.
+ *
+ * clock_out = refclk / div_ref * loopc / div_out
+ *
+ * refclk is determined by the oscillator mounted on the motherboard(
+ * Here is 100MHz in almost all board)
+ *
+ * @this: point to the object from where this function is called
+ * @clock_khz: the desired output pixel clock, the unit is kHz
+ * @pout: point to the out struct of lsdc_pll_parms
+ *
+ * Return 0 if a set of parameter is found, otherwise return the error
+ * between clock_kHz we wanted and the most closest candidate with it.
+ */
+static int lsdc_pixpll_compute(struct lsdc_pll * const this,
+ unsigned int clock_khz,
+ struct lsdc_pll_parms *pout)
+{
+ const unsigned int tolerance = 1000;
+ unsigned int refclk = this->ref_clock;
+ unsigned int min = tolerance;
+ unsigned int div_out, loopc, div_ref;
+ unsigned int computed;
+
+ if (!lsdc_pixpll_find(this, clock_khz, pout))
+ return 0;
+
+ for (div_out = 6; div_out < 64; div_out++) {
+ for (div_ref = 3; div_ref < 6; div_ref++) {
+ for (loopc = 6; loopc < 161; loopc++) {
+ unsigned int diff;
+
+ if (loopc < 12 * div_ref)
+ continue;
+ if (loopc > 32 * div_ref)
+ continue;
+
+ computed = refclk / div_ref * loopc / div_out;
+
+ if (clock_khz >= computed)
+ diff = clock_khz - computed;
+ else if (clock_khz < computed)
+ diff = computed - clock_khz;
+
+ if (diff < min) {
+ min = diff;
+ pout->div_ref = div_ref;
+ pout->div_out = div_out;
+ pout->loopc = loopc;
+
+ if (diff == 0)
+ return 0;
+ }
+ }
+ }
+ }
+
+ if (min < tolerance)
+ return 0;
+
+ return min;
+}
+
+/*
+ * Update the pll parameters to hardware, target to the pixpll in ls7a1000
+ *
+ * @this: point to the object from which this function is called
+ * @pin: point to the struct of lsdc_pll_parms passed in
+ *
+ * return 0 if successful.
+ */
+static int ls7a1000_pixpll_param_update(struct lsdc_pll * const this,
+ struct lsdc_pll_parms const *pin)
+{
+ void __iomem *reg = this->mmio;
+ unsigned int counter = 0;
+ bool locked;
+ u32 val;
+
+ /* Bypass the software configured PLL, using refclk directly */
+ val = readl(reg + 0x4);
+ val &= ~(1 << 8);
+ writel(val, reg + 0x4);
+
+ /* Powerdown the PLL */
+ val = readl(reg + 0x4);
+ val |= (1 << 13);
+ writel(val, reg + 0x4);
+
+ /* Clear the pll parameters */
+ val = readl(reg + 0x4);
+ val &= ~(1 << 11);
+ writel(val, reg + 0x4);
+
+ /* clear old value & config new value */
+ val = readl(reg + 0x04);
+ val &= ~0x7F;
+ val |= pin->div_ref; /* div_ref */
+ writel(val, reg + 0x4);
+
+ val = readl(reg);
+ val &= ~0x7f;
+ val |= pin->div_out; /* div_out */
+
+ val &= ~(0x1ff << 21);
+ val |= pin->loopc << 21; /* loopc */
+ writel(val, reg);
+
+ /* Set the pll the parameters */
+ val = readl(reg + 0x4);
+ val |= (1 << 11);
+ writel(val, reg + 0x4);
+
+ /* Powerup the PLL */
+ val = readl(reg + 0x4);
+ val &= ~(1 << 13);
+ writel(val, reg + 0x4);
+
+ udelay(1);
+
+ /* Wait the PLL lock */
+ do {
+ val = readl(reg + 0x4);
+ locked = val & 0x80;
+ if (locked)
+ break;
+ ++counter;
+ } while (counter < 2000);
+
+ drm_dbg(this->ddev, "%u loop waited\n", counter);
+
+ /* Switch to the configured pll just now */
+ val = readl(reg + 0x4);
+ val |= (1UL << 8);
+ writel(val, reg + 0x4);
+
+ return 0;
+}
+
+static unsigned int ls7a1000_get_clock_rate(struct lsdc_pll * const this,
+ struct lsdc_pll_parms *pout)
+{
+ union lsdc_pixpll_bitmap parms;
+ struct ls7a1000_pixpll_bitmap *obj = &parms.ls7a1000;
+ unsigned int out;
+
+ parms.dword[0] = readl(this->mmio);
+ parms.dword[1] = readl(this->mmio + 4);
+ out = this->ref_clock / obj->div_ref * obj->loopc / obj->div_out;
+ if (pout) {
+ pout->div_ref = obj->div_ref;
+ pout->loopc = obj->loopc;
+ pout->div_out = obj->div_out;
+ }
+
+ return out;
+}
+
+static const struct lsdc_pixpll_funcs ls7a1000_pixpll_funcs = {
+ .setup = lsdc_pixpll_setup,
+ .compute = lsdc_pixpll_compute,
+ .update = ls7a1000_pixpll_param_update,
+ .get_clock_rate = ls7a1000_get_clock_rate,
+};
+
+int lsdc_pixpll_init(struct lsdc_pll * const this,
+ struct drm_device *ddev,
+ unsigned int index)
+{
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ const struct lsdc_desc *descp = ldev->descp;
+
+ this->ddev = ddev;
+ this->index = index;
+ this->ref_clock = LSDC_PLL_REF_CLK;
+
+ /* LS7A1000, LS7A2000's setting registers is same */
+ if (descp->chip == CHIP_LS7A2000 ||
+ descp->chip == CHIP_LS7A1000) {
+ if (index == 0)
+ this->reg_base = LS7A1000_CFG_REG_BASE + LS7A1000_PIX_PLL0_REG;
+ else if (index == 1)
+ this->reg_base = LS7A1000_CFG_REG_BASE + LS7A1000_PIX_PLL1_REG;
+ this->reg_size = 8;
+ this->funcs = &ls7a1000_pixpll_funcs;
+ } else {
+ drm_err(ddev, "unknown chip, the driver need update\n");
+ return -ENOENT;
+ }
+
+ return this->funcs->setup(this);
+}
new file mode 100644
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __LSDC_PLL_H__
+#define __LSDC_PLL_H__
+
+#include <drm/drm_device.h>
+
+/*
+ * Loongson Pixel PLL hardware structure
+ *
+ * refclk: reference frequency, 100 MHz from external oscillator
+ * outclk: output frequency desired.
+ *
+ *
+ * L1 Fref Fvco L2
+ * refclk +-----------+ +------------------+ +---------+ outclk
+ * ---+---> | Prescaler | ---> | Clock Multiplier | ---> | divider | -------->
+ * | +-----------+ +------------------+ +---------+ ^
+ * | ^ ^ ^ |
+ * | | | | |
+ * | | | | |
+ * | div_ref loopc div_out |
+ * | |
+ * +--- sel_out (bypass above software configurable clock if set) ----+
+ *
+ * sel_out: PLL clock output selector (for debug purpose only).
+ *
+ * If sel_out == 1, it will take refclk as output directly,
+ * the L1 Prescaler and the out divider will be bypassed.
+ *
+ * If sel_out == 0, then outclk = refclk / div_ref * loopc / div_out;
+ *
+ * PLL working requirements:
+ *
+ * 1) 20 MHz <= refclk / div_ref <= 40Mhz
+ * 2) 1.2 GHz <= refclk /div_out * loopc <= 3.2 Ghz
+ */
+
+struct lsdc_pll_parms {
+ unsigned int div_ref;
+ unsigned int loopc;
+ unsigned int div_out;
+};
+
+struct lsdc_pll;
+
+struct lsdc_pixpll_funcs {
+ int (*setup)(struct lsdc_pll * const this);
+ int (*compute)(struct lsdc_pll * const this, unsigned int clock,
+ struct lsdc_pll_parms *pout);
+ int (*update)(struct lsdc_pll * const this, struct lsdc_pll_parms const *pin);
+ unsigned int (*get_clock_rate)(struct lsdc_pll * const this,
+ struct lsdc_pll_parms *pout);
+};
+
+struct lsdc_pll {
+ const struct lsdc_pixpll_funcs *funcs;
+ struct drm_device *ddev;
+ void __iomem *mmio;
+
+ /* PLL register offset */
+ u32 reg_base;
+ /* PLL register size in bytes */
+ u32 reg_size;
+
+ /* 100000kHz, fixed on all board found */
+ unsigned int ref_clock;
+
+ unsigned int index;
+};
+
+int lsdc_pixpll_init(struct lsdc_pll * const this,
+ struct drm_device *ddev,
+ unsigned int index);
+
+#endif
new file mode 100644
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include "lsdc_drv.h"
+
+/*
+ * Processor ID (implementation) values for bits 15:8 of the PRID register.
+ */
+#define LOONGSON_CPU_IMP_MASK 0xff00
+#define LOONGSON_CPU_IMP_SHIFT 8
+
+#define LOONGARCH_CPU_IMP_LS2K1000 0xa0
+#define LOONGARCH_CPU_IMP_LS2K2000 0xb0
+#define LOONGARCH_CPU_IMP_LS3A5000 0xc0
+
+#define LOONGSON_CPU_MIPS_IMP_LS2K 0x61 /* Loongson 2K Mips series SoC */
+
+/*
+ * Particular Revision values for bits 7:0 of the PRID register.
+ */
+#define LOONGSON_CPU_REV_MASK 0x00ff
+
+#define LOONGARCH_CPUCFG_PRID_REG 0x0
+
+unsigned int loongson_cpu_get_prid(u8 *imp, u8 *rev)
+{
+ unsigned int prid = 0;
+
+#if defined(__loongarch__)
+ __asm__ volatile("cpucfg %0, %1\n\t"
+ : "=&r"(prid)
+ : "r"(LOONGARCH_CPUCFG_PRID_REG)
+ );
+#endif
+
+#if defined(__mips__)
+ __asm__ volatile("mfc0\t%0, $15\n\t"
+ : "=r" (prid)
+ );
+#endif
+
+ if (imp)
+ *imp = (prid & LOONGSON_CPU_IMP_MASK) >> LOONGSON_CPU_IMP_SHIFT;
+
+ if (rev)
+ *rev = prid & LOONGSON_CPU_REV_MASK;
+
+ return prid;
+}
+
+/* LS2K2000 has only LoongArch edition (LA364) */
+bool lsdc_is_ls2k2000(void)
+{
+ u8 imp;
+
+ loongson_cpu_get_prid(&imp, NULL);
+
+ if (imp == LOONGARCH_CPU_IMP_LS2K2000)
+ return true;
+
+ return false;
+}
+
+bool lsdc_is_ls2k1000(void)
+{
+ u8 imp;
+
+ loongson_cpu_get_prid(&imp, NULL);
+
+#if defined(__mips__)
+ /* LS2K1000 has Mips edition(mips64r2) */
+ if (imp == LOONGSON_CPU_MIPS_IMP_LS2K)
+ return true;
+#endif
+
+#if defined(__loongarch__)
+ /* LS2K1000 has loongarch edition(LA264)
+ * CPU core and instruction set changed, remains are basically same
+ */
+ if (imp == LOONGARCH_CPU_IMP_LS2K1000)
+ return true;
+#endif
+
+ return false;
+}
new file mode 100644
@@ -0,0 +1,353 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __LSDC_REGS_H__
+#define __LSDC_REGS_H__
+
+#include <linux/bitops.h>
+#include <linux/types.h>
+
+/*
+ * PIXEL PLL Reference clock
+ */
+#define LSDC_PLL_REF_CLK 100000 /* kHz */
+
+/*
+ * Those PLL registers are relative to LSxxxxx_CFG_REG_BASE. xxxxx = 7A1000,
+ * 2K1000, 2K2000 etc
+ */
+
+#define LS7A1000_PIX_PLL0_REG 0x04B0
+#define LS7A1000_PIX_PLL1_REG 0x04C0
+#define LS7A1000_CFG_REG_BASE 0x10010000
+
+#define CFG_PIX_FMT_MASK GENMASK(2, 0)
+
+enum lsdc_pixel_format {
+ LSDC_PF_NONE = 0,
+ LSDC_PF_ARGB4444 = 1, /* ARGB A:4 bits R/G/B: 4 bits each [16 bits] */
+ LSDC_PF_ARGB1555 = 2, /* ARGB A:1 bit RGB:15 bits [16 bits] */
+ LSDC_PF_RGB565 = 3, /* RGB [16 bits] */
+ LSDC_PF_XRGB8888 = 4, /* XRGB [32 bits] */
+ LSDC_PF_RGBA8888 = 5, /* ARGB [32 bits] */
+};
+
+/*
+ * Each crtc has two set fb address registers usable, CFG_FB_IN_USING of
+ * LSDC_CRTCx_CFG_REG specify which fb address register is currently
+ * in using by the CRTC. CFG_PAGE_FLIP of LSDC_CRTCx_CFG_REG is used to
+ * trigger the switch which will be finished at the very next vblank.
+ * Trigger it again if you want to switch back.
+ */
+#define CFG_PAGE_FLIP BIT(7)
+#define CFG_OUTPUT_EN BIT(8)
+/*
+ * CRTC0 clone from CRTC1 or CRTC1 clone from CRTC0 using hardware logic,
+ * Hardware engineer say this would help to save bandwidth, To enable this
+ * feature, you need to set this bit.
+ */
+#define CFG_HW_CLONE_EN BIT(9)
+/* Indicate witch fb addr reg is in using, currently */
+#define CFG_FB_IN_USING BIT(11)
+#define CFG_GAMMA_EN BIT(12)
+
+/* The DC get soft reset if value of this bit changed from "1" to "0" */
+#define CFG_RESET_N BIT(20)
+
+/*
+ * The DMA step of the DC in LS7A2000/LS2K2000 is configurable,
+ * setting those bits on ls7a1000 platform make no effect.
+ */
+#define CFG_DMA_STEP_MASK GENMASK(17, 16)
+#define CFG_DMA_STEP_SHIFT 16
+enum lsdc_dma_steps {
+ LSDC_DMA_STEP_256_BYTES = 0 << CFG_DMA_STEP_SHIFT,
+ LSDC_DMA_STEP_128_BYTES = 1 << CFG_DMA_STEP_SHIFT,
+ LSDC_DMA_STEP_64_BYTES = 2 << CFG_DMA_STEP_SHIFT,
+ LSDC_DMA_STEP_32_BYTES = 3 << CFG_DMA_STEP_SHIFT,
+};
+
+#define CFG_HSYNC_EN BIT(30)
+#define CFG_HSYNC_INV BIT(31)
+#define CFG_VSYNC_EN BIT(30)
+#define CFG_VSYNC_INV BIT(31)
+
+/******** CRTC0 & DVO0 ********/
+#define LSDC_CRTC0_CFG_REG 0x1240
+
+/*
+ * If FB0_XX_ADDR_REG is in using, we write the address to FB0_XX_ADDR_REG,
+ * if FB1_XX_ADDR_REG is in using, we write the address to FB1_XX_ADDR_REG.
+ * For each CRTC, the switch from using FB0_XX_ADDR_REG to FB1_XX_ADDR_REG
+ * is triggered by set CFG_PAGE_FLIP bit of LSDC_CRTCx_CFG_REG.
+ */
+#define LSDC_CRTC0_FB0_LO_ADDR_REG 0x1260
+#define LSDC_CRTC0_FB0_HI_ADDR_REG 0x15A0
+#define LSDC_CRTC0_FB1_LO_ADDR_REG 0x1580
+#define LSDC_CRTC0_FB1_HI_ADDR_REG 0x15C0
+#define LSDC_CRTC0_STRIDE_REG 0x1280
+#define LSDC_CRTC0_FB_ORIGIN_REG 0x1300
+
+/* [27:16] total number of pixels, [11:0] Active number of pixels, horizontal */
+#define LSDC_CRTC0_HDISPLAY_REG 0x1400
+/* [12:0] hsync start [28:16] hsync end, 30: hsync enable, 31: hsync invert */
+#define LSDC_CRTC0_HSYNC_REG 0x1420
+/* [27:16] total number of pixels, [11:0] Active number of pixels, vertical */
+#define LSDC_CRTC0_VDISPLAY_REG 0x1480
+/* [12:0] vsync start [28:16] vsync end, 30: vsync enable, 31: vsync invert */
+#define LSDC_CRTC0_VSYNC_REG 0x14A0
+
+#define LSDC_CRTC0_GAMMA_INDEX_REG 0x14E0
+#define LSDC_CRTC0_GAMMA_DATA_REG 0x1500
+
+/******** CTRC1 & DVO1 ********/
+#define LSDC_CRTC1_CFG_REG 0x1250
+#define LSDC_CRTC1_FB0_LO_ADDR_REG 0x1270
+#define LSDC_CRTC1_FB0_HI_ADDR_REG 0x15B0
+#define LSDC_CRTC1_FB1_LO_ADDR_REG 0x1590
+#define LSDC_CRTC1_FB1_HI_ADDR_REG 0x15D0
+#define LSDC_CRTC1_STRIDE_REG 0x1290
+#define LSDC_CRTC1_FB_ORIGIN_REG 0x1310
+#define LSDC_CRTC1_HDISPLAY_REG 0x1410
+#define LSDC_CRTC1_HSYNC_REG 0x1430
+#define LSDC_CRTC1_VDISPLAY_REG 0x1490
+#define LSDC_CRTC1_VSYNC_REG 0x14B0
+#define LSDC_CRTC1_GAMMA_INDEX_REG 0x14F0
+#define LSDC_CRTC1_GAMMA_DATA_REG 0x1510
+
+/*
+ * All of the DC variants has hardware which record the scan position of
+ * the CRTC, [31:16] : current X position, [15:0] : current Y position
+ */
+#define LSDC_CRTC0_SCAN_POS_REG 0x14C0
+#define LSDC_CRTC1_SCAN_POS_REG 0x14D0
+
+/*
+ * In gross, LSDC_CRTC1_XXX_REG - LSDC_CRTC0_XXX_REG = 0x10, but not all of
+ * the registers obey this rule, LSDC_CURSORx_XXX_REG just don't honor this.
+ * This is the root cause we can't untangle the code by simply manpulating
+ * offset of the register access. Our hardware engineers are lack experiance
+ * when they design this, most of them just post graduate student...
+ */
+#define CRTC_PIPE_OFFSET 0x10
+
+/*
+ * There is only one hardware cursor unit in LS7A1000 and LS2K1000, let
+ * CFG_HW_CLONE_EN bit be "1" could eliminate this embarrassment, we made
+ * it on custom clone mode application. While LS7A2000 has two hardware
+ * cursor unit which is good enough.
+ */
+#define CURSOR_FORMAT_MASK GENMASK(1, 0)
+enum lsdc_cursor_format {
+ CURSOR_FORMAT_DISABLE = 0,
+ CURSOR_FORMAT_MONOCHROME = 1,
+ CURSOR_FORMAT_ARGB8888 = 2,
+};
+
+/*
+ * LS7A1000 and LS2K1000 only support 32x32, LS2K2000 and LS7A2000 support
+ * 64x64, but it seems that setting this bit make no harm on LS7A1000, it
+ * just don't take effects.
+ */
+#define CURSOR_SIZE_64X64 BIT(2) /* 1: 64x64, 0: 32x32 */
+#define CURSOR_LOCATION BIT(4) /* 1: on CRTC-1, 0: on CRTC-0 */
+
+#define LSDC_CURSOR0_CFG_REG 0x1520
+#define LSDC_CURSOR0_ADDR_LO_REG 0x1530
+#define LSDC_CURSOR0_ADDR_HI_REG 0x15e0
+#define LSDC_CURSOR0_POSITION_REG 0x1540 /* [31:16] Y, [15:0] X */
+#define LSDC_CURSOR0_BG_COLOR_REG 0x1550 /* background color */
+#define LSDC_CURSOR0_FG_COLOR_REG 0x1560 /* foreground color */
+
+#define LSDC_CURSOR1_CFG_REG 0x1670
+#define LSDC_CURSOR1_ADDR_LO_REG 0x1680
+#define LSDC_CURSOR1_ADDR_HI_REG 0x16e0
+#define LSDC_CURSOR1_POSITION_REG 0x1690 /* [31:16] Y, [15:0] X */
+#define LSDC_CURSOR1_BG_COLOR_REG 0x16A0 /* background color */
+#define LSDC_CURSOR1_FG_COLOR_REG 0x16B0 /* foreground color */
+
+/*
+ * DC Interrupt Control Register, 32bit, Address Offset: 1570
+ *
+ * Bits 15:0 inidicate the interrupt status
+ * Bits 31:16 control enable interrupts corresponding to bit 15:0 or not
+ * Write 1 to enable, write 0 to disable
+ *
+ * RF: Read Finished
+ * IDBU: Internal Data Buffer Underflow
+ * IDBFU: Internal Data Buffer Fatal Underflow
+ * CBRF: Cursor Buffer Read Finished Flag, no use.
+ *
+ * +-------+--------------------------+-------+--------+--------+-------+
+ * | 31:27 | 26:16 | 15:11 | 10 | 9 | 8 |
+ * +-------+--------------------------+-------+--------+--------+-------+
+ * | N/A | Interrupt Enable Control | N/A | IDBFU0 | IDBFU1 | IDBU0 |
+ * +-------+--------------------------+-------+--------+--------+-------+
+ *
+ * +-------+-----+-----+------+--------+--------+--------+--------+
+ * | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+ * +-------+-----+-----+------+--------+--------+--------+--------+
+ * | IDBU1 | RF0 | RF1 | CRRF | HSYNC0 | VSYNC0 | HSYNC1 | VSYNC1 |
+ * +-------+-----+-----+------+--------+--------+--------+--------+
+ *
+ * unfortunately, CRTC0's interrupt is mess with CRTC1's interrupt in one
+ * register again.
+ */
+
+#define LSDC_INT_REG 0x1570
+
+#define INT_CRTC0_VSYNC BIT(2)
+#define INT_CRTC0_HSYNC BIT(3)
+#define INT_CRTC0_RF BIT(6)
+#define INT_CRTC0_IDBU BIT(8)
+#define INT_CRTC0_IDBFU BIT(10)
+
+#define INT_CRTC1_VSYNC BIT(0)
+#define INT_CRTC1_HSYNC BIT(1)
+#define INT_CRTC1_RF BIT(5)
+#define INT_CRTC1_IDBU BIT(7)
+#define INT_CRTC1_IDBFU BIT(9)
+
+#define INT_CRTC0_VSYNC_EN BIT(18)
+#define INT_CRTC0_HSYNC_EN BIT(19)
+#define INT_CRTC0_RF_EN BIT(22)
+#define INT_CRTC0_IDBU_EN BIT(24)
+#define INT_CRTC0_IDBFU_EN BIT(26)
+
+#define INT_CRTC1_VSYNC_EN BIT(16)
+#define INT_CRTC1_HSYNC_EN BIT(17)
+#define INT_CRTC1_RF_EN BIT(21)
+#define INT_CRTC1_IDBU_EN BIT(23)
+#define INT_CRTC1_IDBFU_EN BIT(25)
+
+#define INT_STATUS_MASK GENMASK(15, 0)
+
+/*
+ * LS7A1000/LS7A2000 have 4 gpios which are used to emulated I2C.
+ * They are under control of the LS7A_DC_GPIO_DAT_REG and LS7A_DC_GPIO_DIR_REG
+ * register, Those GPIOs has no relationship whth the GPIO hardware on the
+ * bridge chip itself. Those offsets are relative to DC register base address
+ *
+ * LS2k1000 don't have those registers, they use hardware i2c or general GPIO
+ * emulated i2c from linux i2c subsystem.
+ *
+ * GPIO data register, address offset: 0x1650
+ * +---------------+-----------+-----------+
+ * | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+ * +---------------+-----------+-----------+
+ * | | DVO1 | DVO0 |
+ * + N/A +-----------+-----------+
+ * | | SCL | SDA | SCL | SDA |
+ * +---------------+-----------+-----------+
+ */
+#define LS7A_DC_GPIO_DAT_REG 0x1650
+
+/*
+ * GPIO Input/Output direction control register, address offset: 0x1660
+ */
+#define LS7A_DC_GPIO_DIR_REG 0x1660
+
+/*
+ * LS7A2000 has two built-in HDMI Encoder and one VGA encoder
+ */
+
+/*
+ * Number of continuous packets may be present
+ * in HDMI hblank and vblank zone, should >= 48
+ */
+#define LSDC_HDMI0_ZONE_REG 0x1700
+#define LSDC_HDMI1_ZONE_REG 0x1710
+
+/* HDMI Iterface Control Reg */
+#define HDMI_INTERFACE_EN BIT(0)
+#define HDMI_PACKET_EN BIT(1)
+#define HDMI_AUDIO_EN BIT(2)
+/*
+ * Preamble:
+ * Immediately preceding each video data period or data island period is the
+ * preamble. This is a sequence of eight identical control characters that
+ * indicate whether the upcoming data period is a video data period or is a
+ * data island. The values of CTL0, CTL1, CTL2, and CTL3 indicate the type of
+ * data period that follows.
+ */
+#define HDMI_VIDEO_PREAMBLE_MASK GENMASK(7, 4)
+#define HDMI_VIDEO_PREAMBLE_SHIFT 4
+/* 1: hw i2c, 0: gpio emu i2c, shouldn't put in LSDC_HDMIx_INTF_CTRL_REG */
+#define HW_I2C_EN BIT(8)
+#define HDMI_CTL_PERIOD_MODE BIT(9)
+#define LSDC_HDMI0_INTF_CTRL_REG 0x1720
+#define LSDC_HDMI1_INTF_CTRL_REG 0x1730
+
+#define HDMI_PHY_EN BIT(0)
+#define HDMI_PHY_RESET_N BIT(1)
+#define HDMI_PHY_TERM_L_EN BIT(8)
+#define HDMI_PHY_TERM_H_EN BIT(9)
+#define HDMI_PHY_TERM_DET_EN BIT(10)
+#define HDMI_PHY_TERM_STATUS BIT(11)
+#define LSDC_HDMI0_PHY_CTRL_REG 0x1800
+#define LSDC_HDMI1_PHY_CTRL_REG 0x1810
+
+#define LSDC_HDMI0_PHY_PLL_REG 0x1820
+#define LSDC_HDMI1_PHY_PLL_REG 0x1830
+
+/* High level duration need > 1us */
+#define HDMI_PLL_ENABLE BIT(0)
+#define HDMI_PLL_LOCKED BIT(16)
+/* Bypass the software configured values, using default source from somewhere */
+#define HDMI_PLL_BYPASS BIT(17)
+
+#define HDMI_PLL_IDF_SHIFT 1
+#define HDMI_PLL_IDF_MASK GENMASK(5, 1)
+#define HDMI_PLL_LF_SHIFT 6
+#define HDMI_PLL_LF_MASK GENMASK(12, 6)
+#define HDMI_PLL_ODF_SHIFT 13
+#define HDMI_PLL_ODF_MASK GENMASK(15, 13)
+
+/* LS7A2000/LS2K2000 has hpd status reg, while the two hdmi's status
+ * located at the one register again.
+ */
+#define LSDC_HDMI_HPD_STATUS_REG 0x1BA0
+#define HDMI0_HPD_FLAG BIT(0)
+#define HDMI1_HPD_FLAG BIT(1)
+
+#define LSDC_HDMI0_PHY_CAL_REG 0x18c0
+#define LSDC_HDMI1_PHY_CAL_REG 0x18d0
+
+/* AVI InfoFrame */
+#define LSDC_HDMI0_AVI_CONTENT0 0x18e0
+#define LSDC_HDMI1_AVI_CONTENT0 0x18f0
+#define LSDC_HDMI0_AVI_CONTENT1 0x1900
+#define LSDC_HDMI1_AVI_CONTENT1 0x1910
+#define LSDC_HDMI0_AVI_CONTENT2 0x1920
+#define LSDC_HDMI1_AVI_CONTENT2 0x1930
+#define LSDC_HDMI0_AVI_CONTENT3 0x1940
+#define LSDC_HDMI1_AVI_CONTENT3 0x1950
+
+/* 1: enable avi infoframe packet, 0: disable avi infoframe packet */
+#define AVI_PKT_ENABLE BIT(0)
+/* 1: send one every two frame, 0: send one each frame */
+#define AVI_PKT_SEND_FREQ BIT(1)
+/*
+ * 1: write 1 to flush avi reg content0 ~ content3 to the packet to be send,
+ * The hardware will clear this bit automatically.
+ */
+#define AVI_PKT_UPDATE BIT(2)
+
+#define LSDC_HDMI0_AVI_INFO_CRTL_REG 0x1960
+#define LSDC_HDMI1_AVI_INFO_CRTL_REG 0x1970
+
+/*
+ * LS7A2000 has the hardware which count the number of vblank generated
+ */
+#define LSDC_CRTC0_VSYNC_COUNTER_REG 0x1A00
+#define LSDC_CRTC1_VSYNC_COUNTER_REG 0x1A10
+
+/*
+ * LS7A2000 has the audio hardware associate with the HDMI encoder.
+ */
+#define LSDC_HDMI0_AUDIO_PLL_LO_REG 0x1A20
+#define LSDC_HDMI1_AUDIO_PLL_LO_REG 0x1A30
+
+#define LSDC_HDMI0_AUDIO_PLL_HI_REG 0x1A40
+#define LSDC_HDMI1_AUDIO_PLL_HI_REG 0x1A50
+
+#endif
new file mode 100644
@@ -0,0 +1,445 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <drm/drm_drv.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_managed.h>
+#include <drm/ttm/ttm_range_manager.h>
+#include <drm/ttm/ttm_tt.h>
+
+#include "lsdc_drv.h"
+#include "lsdc_ttm.h"
+
+static void lsdc_ttm_tt_destroy(struct ttm_device *bdev, struct ttm_tt *tt)
+{
+ ttm_tt_fini(tt);
+ kfree(tt);
+}
+
+static struct ttm_tt *
+lsdc_ttm_tt_create(struct ttm_buffer_object *bo, uint32_t page_flags)
+{
+ struct ttm_tt *tt;
+ int ret;
+
+ tt = kzalloc(sizeof(*tt), GFP_KERNEL);
+ if (!tt)
+ return NULL;
+
+ ret = ttm_tt_init(tt, bo, page_flags, ttm_cached, 0);
+ if (ret < 0) {
+ kfree(tt);
+ return NULL;
+ }
+
+ return tt;
+}
+
+void lsdc_bo_set_placement(struct ttm_buffer_object *tbo, u32 domain, u32 flags)
+{
+ struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+ unsigned int i;
+ unsigned int c = 0;
+
+ lbo->placement.placement = lbo->placements;
+ lbo->placement.busy_placement = lbo->placements;
+
+ if (domain & LSDC_GEM_DOMAIN_VRAM) {
+ lbo->placements[c].mem_type = TTM_PL_VRAM;
+ lbo->placements[c++].flags = flags;
+ }
+
+ if (domain & LSDC_GEM_DOMAIN_SYSTEM || !c) {
+ lbo->placements[c].mem_type = TTM_PL_SYSTEM;
+ lbo->placements[c++].flags = flags;
+ }
+
+ lbo->placement.num_placement = c;
+ lbo->placement.num_busy_placement = c;
+
+ for (i = 0; i < c; ++i) {
+ lbo->placements[i].fpfn = 0;
+ lbo->placements[i].lpfn = 0;
+ }
+}
+
+static void lsdc_bo_evict_flags(struct ttm_buffer_object *tbo,
+ struct ttm_placement *placement)
+{
+ struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+
+ lsdc_bo_set_placement(tbo, LSDC_GEM_DOMAIN_SYSTEM, 0);
+
+ *placement = lbo->placement;
+}
+
+static int lsdc_bo_move(struct ttm_buffer_object *tbo,
+ bool evict,
+ struct ttm_operation_ctx *ctx,
+ struct ttm_resource *new_mem,
+ struct ttm_place *hop)
+{
+ struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+ struct drm_device *ddev = tbo->base.dev;
+
+ if (drm_WARN_ON_ONCE(ddev, lbo->vmap_use_count))
+ goto just_move_it;
+
+ ttm_bo_vunmap(tbo, &lbo->map);
+ /* explicitly clear mapping for next vmap call */
+ iosys_map_clear(&lbo->map);
+
+ drm_dbg(ddev, "%s: evict: %s\n", __func__, evict ? "Yes" : "No");
+
+just_move_it:
+ return ttm_bo_move_memcpy(tbo, ctx, new_mem);
+}
+
+static void lsdc_bo_delete_mem_notify(struct ttm_buffer_object *tbo)
+{
+ struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+ struct drm_device *ddev = tbo->base.dev;
+
+ if (drm_WARN_ON_ONCE(ddev, lbo->vmap_use_count))
+ return;
+
+ ttm_bo_vunmap(tbo, &lbo->map);
+ iosys_map_clear(&lbo->map);
+}
+
+static int lsdc_bo_reserve_io_mem(struct ttm_device *bdev,
+ struct ttm_resource *mem)
+{
+ struct lsdc_device *ldev = tdev_to_lsdc(bdev);
+
+ switch (mem->mem_type) {
+ case TTM_PL_SYSTEM:
+ /* nothing to do */
+ break;
+ case TTM_PL_VRAM:
+ mem->bus.offset = (mem->start << PAGE_SHIFT) + ldev->vram_base;
+ mem->bus.is_iomem = true;
+ mem->bus.caching = ttm_write_combined;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct ttm_device_funcs lsdc_bo_driver = {
+ .ttm_tt_create = lsdc_ttm_tt_create,
+ .ttm_tt_destroy = lsdc_ttm_tt_destroy,
+ .eviction_valuable = ttm_bo_eviction_valuable,
+ .evict_flags = lsdc_bo_evict_flags,
+ .move = lsdc_bo_move,
+ .delete_mem_notify = lsdc_bo_delete_mem_notify,
+ .io_mem_reserve = lsdc_bo_reserve_io_mem,
+};
+
+static void lsdc_bo_free(struct drm_gem_object *gem)
+{
+ struct ttm_buffer_object *tbo = to_ttm_bo(gem);
+
+ ttm_bo_put(tbo);
+}
+
+int lsdc_bo_pin(struct drm_gem_object *gem)
+{
+ struct ttm_buffer_object *tbo = to_ttm_bo(gem);
+ struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+ int ret;
+
+ ret = ttm_bo_reserve(tbo, true, false, NULL);
+ if (ret) {
+ drm_err(gem->dev, "%s: %d\n", __func__, ret);
+ return ret;
+ }
+
+ if (tbo->pin_count == 0) {
+ struct ttm_operation_ctx ctx = { false, false };
+
+ ret = ttm_bo_validate(tbo, &lbo->placement, &ctx);
+ if (ret < 0) {
+ ttm_bo_unreserve(tbo);
+ drm_err(gem->dev, "%s: %d\n", __func__, ret);
+ return ret;
+ }
+ }
+
+ ttm_bo_pin(tbo);
+
+ ttm_bo_unreserve(tbo);
+
+ return ret;
+}
+
+void lsdc_bo_unpin(struct drm_gem_object *gem)
+{
+ struct ttm_buffer_object *tbo = to_ttm_bo(gem);
+ int ret;
+
+ ret = ttm_bo_reserve(tbo, true, false, NULL);
+ if (ret) {
+ drm_err(gem->dev, "%s: bo reserve failed\n", __func__);
+ return;
+ }
+
+ ttm_bo_unpin(tbo);
+ ttm_bo_unreserve(tbo);
+}
+
+static int lsdc_bo_vmap(struct drm_gem_object *gem, struct iosys_map *map)
+{
+ struct drm_device *ddev = gem->dev;
+ struct ttm_buffer_object *tbo = to_ttm_bo(gem);
+ struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+ int ret;
+
+ dma_resv_assert_held(gem->resv);
+
+ if (tbo->pin_count == 0) {
+ struct ttm_operation_ctx ctx = { false, false };
+
+ ret = ttm_bo_validate(tbo, &lbo->placement, &ctx);
+ if (ret < 0)
+ return ret;
+ }
+
+ ttm_bo_pin(tbo);
+
+ if (lbo->vmap_use_count > 0) {
+ drm_dbg(ddev, "%s: already mapped\n", __func__);
+ goto finish;
+ }
+
+ /* Only vmap if the there's no mapping present */
+ if (iosys_map_is_null(&lbo->map)) {
+ ret = ttm_bo_vmap(tbo, &lbo->map);
+ if (ret) {
+ ttm_bo_unpin(tbo);
+ return ret;
+ }
+ }
+
+finish:
+ ++lbo->vmap_use_count;
+ *map = lbo->map;
+
+ return 0;
+}
+
+static void lsdc_bo_vunmap(struct drm_gem_object *gem, struct iosys_map *map)
+{
+ struct drm_device *ddev = gem->dev;
+ struct ttm_buffer_object *tbo = to_ttm_bo(gem);
+ struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+
+ dma_resv_assert_held(gem->resv);
+
+ if (drm_WARN_ON_ONCE(ddev, !lbo->vmap_use_count))
+ return;
+
+ if (drm_WARN_ON_ONCE(ddev, !iosys_map_is_equal(&lbo->map, map)))
+ return; /* BUG: map not mapped from this BO */
+
+ if (--lbo->vmap_use_count > 0)
+ return;
+
+ /* We delay the actual unmap operation until the BO gets evicted */
+ ttm_bo_unpin(tbo);
+}
+
+static int lsdc_bo_mmap(struct drm_gem_object *gem,
+ struct vm_area_struct *vma)
+{
+ struct ttm_buffer_object *tbo = to_ttm_bo(gem);
+ int ret;
+
+ ret = ttm_bo_mmap_obj(vma, tbo);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * ttm has its own object refcounting, so drop gem reference
+ * to avoid double accounting counting.
+ */
+ drm_gem_object_put(gem);
+
+ return 0;
+}
+
+static const struct drm_gem_object_funcs lsdc_gem_object_funcs = {
+ .free = lsdc_bo_free,
+ .pin = lsdc_bo_pin,
+ .unpin = lsdc_bo_unpin,
+ .vmap = lsdc_bo_vmap,
+ .vunmap = lsdc_bo_vunmap,
+ .mmap = lsdc_bo_mmap,
+};
+
+static void lsdc_bo_destroy(struct ttm_buffer_object *tbo)
+{
+ struct lsdc_bo *lbo = to_lsdc_bo(tbo);
+
+ WARN_ON(lbo->vmap_use_count);
+ WARN_ON(iosys_map_is_set(&lbo->map));
+
+ drm_gem_object_release(&tbo->base);
+
+ kfree(lbo);
+}
+
+static struct lsdc_bo *lsdc_bo_create(struct drm_device *ddev, size_t size)
+{
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ struct ttm_device *bdev = &ldev->bdev;
+ struct lsdc_bo *lbo;
+ struct ttm_buffer_object *tbo;
+ struct drm_gem_object *gem;
+ int ret;
+
+ lbo = kzalloc(sizeof(*lbo), GFP_KERNEL);
+ if (!lbo)
+ return ERR_PTR(-ENOMEM);
+
+ tbo = &lbo->tbo;
+ gem = &tbo->base;
+ gem->funcs = &lsdc_gem_object_funcs;
+
+ ret = drm_gem_object_init(ddev, gem, size);
+ if (ret) {
+ kfree(lbo);
+ return ERR_PTR(ret);
+ }
+
+ tbo->bdev = bdev;
+ lsdc_bo_set_placement(tbo, LSDC_GEM_DOMAIN_SYSTEM, 0);
+
+ ret = ttm_bo_init_validate(bdev,
+ tbo,
+ ttm_bo_type_device,
+ &lbo->placement,
+ 0,
+ false, NULL, NULL,
+ lsdc_bo_destroy);
+ if (ret) {
+ kfree(lbo);
+ return ERR_PTR(ret);
+ }
+
+ return lbo;
+}
+
+u64 lsdc_bo_gpu_offset(struct ttm_buffer_object *tbo)
+{
+ struct ttm_resource *resource = tbo->resource;
+
+ if (WARN_ON_ONCE(!tbo->pin_count))
+ return -ENODEV;
+
+ if (WARN_ON_ONCE(resource->mem_type == TTM_PL_SYSTEM))
+ return 0;
+
+ return resource->start << PAGE_SHIFT;
+}
+
+int lsdc_dumb_create(struct drm_file *file,
+ struct drm_device *ddev,
+ struct drm_mode_create_dumb *args)
+{
+ struct lsdc_device *ldev = to_lsdc(ddev);
+ const struct lsdc_desc *descp = ldev->descp;
+ size_t pitch, size;
+ struct lsdc_bo *lbo;
+ struct ttm_buffer_object *tbo;
+ u32 handle;
+ int ret;
+
+ pitch = args->width * DIV_ROUND_UP(args->bpp, 8);
+ pitch = ALIGN(pitch, descp->pitch_align);
+ size = pitch * args->height;
+ size = roundup(size, PAGE_SIZE);
+ if (!size)
+ return -EINVAL;
+
+ lbo = lsdc_bo_create(ddev, size);
+ if (IS_ERR(lbo))
+ return PTR_ERR(lbo);
+
+ tbo = &lbo->tbo;
+
+ ret = drm_gem_handle_create(file, &tbo->base, &handle);
+ if (ret)
+ goto err_drm_gem_object_put;
+
+ drm_gem_object_put(&tbo->base);
+
+ drm_dbg(ddev, "pitch: %lu, height: %u\n", pitch, args->height);
+
+ args->pitch = pitch;
+ args->size = size;
+ args->handle = handle;
+
+ return 0;
+
+err_drm_gem_object_put:
+ drm_gem_object_put(&tbo->base);
+ return ret;
+}
+
+int lsdc_dumb_map_offset(struct drm_file *file,
+ struct drm_device *ddev,
+ u32 handle,
+ uint64_t *offset)
+{
+ struct drm_gem_object *gem;
+
+ gem = drm_gem_object_lookup(file, handle);
+ if (!gem)
+ return -ENOENT;
+
+ *offset = drm_vma_node_offset_addr(&gem->vma_node);
+
+ drm_gem_object_put(gem);
+
+ return 0;
+}
+
+static void lsdc_ttm_fini(struct drm_device *ddev, void *data)
+{
+ struct lsdc_device *ldev = (struct lsdc_device *)data;
+
+ ttm_range_man_fini(&ldev->bdev, TTM_PL_VRAM);
+ ttm_device_fini(&ldev->bdev);
+}
+
+int lsdc_ttm_init(struct lsdc_device *ldev)
+{
+ struct drm_device *ddev = &ldev->base;
+ unsigned long num_pages;
+ int ret;
+
+ ret = ttm_device_init(&ldev->bdev,
+ &lsdc_bo_driver,
+ ddev->dev,
+ ddev->anon_inode->i_mapping,
+ ddev->vma_offset_manager,
+ false,
+ true);
+ if (ret)
+ return ret;
+
+ num_pages = ldev->vram_size >> PAGE_SHIFT;
+
+ ret = ttm_range_man_init(&ldev->bdev,
+ TTM_PL_VRAM,
+ false,
+ num_pages);
+ if (ret)
+ return ret;
+
+ drm_dbg(ddev, "total number of pages: %lu\n", num_pages);
+
+ return drmm_add_action_or_reset(ddev, lsdc_ttm_fini, ldev);
+}
new file mode 100644
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __LSDC_TTM_H__
+#define __LSDC_TTM_H__
+
+#include <linux/container_of.h>
+#include <linux/iosys-map.h>
+
+#include <drm/drm_gem.h>
+#include <drm/ttm/ttm_bo.h>
+#include <drm/ttm/ttm_placement.h>
+
+#define LSDC_GEM_DOMAIN_SYSTEM 0x1
+#define LSDC_GEM_DOMAIN_GTT 0x2
+#define LSDC_GEM_DOMAIN_VRAM 0x4
+
+struct lsdc_bo {
+ struct ttm_buffer_object tbo;
+ struct iosys_map map;
+
+ unsigned int vmap_use_count;
+
+ struct ttm_placement placement;
+ struct ttm_place placements[2];
+};
+
+static inline struct lsdc_bo *
+to_lsdc_bo(struct ttm_buffer_object *tbo)
+{
+ return container_of(tbo, struct lsdc_bo, tbo);
+}
+
+static inline struct lsdc_bo *
+gem_to_lsdc_bo(struct drm_gem_object *gem)
+{
+ return container_of(gem, struct lsdc_bo, tbo.base);
+}
+
+static inline struct ttm_buffer_object *
+to_ttm_bo(struct drm_gem_object *gem)
+{
+ return container_of(gem, struct ttm_buffer_object, base);
+}
+
+int lsdc_bo_pin(struct drm_gem_object *gem);
+void lsdc_bo_unpin(struct drm_gem_object *gem);
+u64 lsdc_bo_gpu_offset(struct ttm_buffer_object *tbo);
+
+void lsdc_bo_set_placement(struct ttm_buffer_object *tbo,
+ u32 domain,
+ u32 flags);
+
+int lsdc_dumb_map_offset(struct drm_file *file,
+ struct drm_device *dev,
+ u32 handle,
+ uint64_t *offset);
+
+int lsdc_dumb_create(struct drm_file *file,
+ struct drm_device *ddev,
+ struct drm_mode_create_dumb *args);
+
+int lsdc_ttm_init(struct lsdc_device *ldev);
+
+#endif