@@ -1,3 +1,8 @@
+stihdmi-y := sti_hdmi.o \
+ sti_hdmi_tx3g0c55phy.o \
+ sti_hdmi_tx3g4c28phy.o \
+
obj-$(CONFIG_DRM_STI) = \
sti_vtg.o \
- sti_vtac.o
\ No newline at end of file
+ sti_vtac.o \
+ stihdmi.o
\ No newline at end of file
new file mode 100644
@@ -0,0 +1,810 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/hdmi.h>
+#include <linux/module.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+
+#include "sti_hdmi.h"
+#include "sti_hdmi_tx3g4c28phy.h"
+#include "sti_hdmi_tx3g0c55phy.h"
+#include "sti_vtg.h"
+
+#define HDMI_CFG 0x0000
+#define HDMI_INT_EN 0x0004
+#define HDMI_INT_STA 0x0008
+#define HDMI_INT_CLR 0x000C
+#define HDMI_STA 0x0010
+#define HDMI_ACTIVE_VID_XMIN 0x0100
+#define HDMI_ACTIVE_VID_XMAX 0x0104
+#define HDMI_ACTIVE_VID_YMIN 0x0108
+#define HDMI_ACTIVE_VID_YMAX 0x010C
+#define HDMI_DFLT_CHL0_DAT 0x0110
+#define HDMI_DFLT_CHL1_DAT 0x0114
+#define HDMI_DFLT_CHL2_DAT 0x0118
+#define HDMI_SW_DI_1_HEAD_WORD 0x0210
+#define HDMI_SW_DI_1_PKT_WORD0 0x0214
+#define HDMI_SW_DI_1_PKT_WORD1 0x0218
+#define HDMI_SW_DI_1_PKT_WORD2 0x021C
+#define HDMI_SW_DI_1_PKT_WORD3 0x0220
+#define HDMI_SW_DI_1_PKT_WORD4 0x0224
+#define HDMI_SW_DI_1_PKT_WORD5 0x0228
+#define HDMI_SW_DI_1_PKT_WORD6 0x022C
+#define HDMI_SW_DI_CFG 0x0230
+
+#define HDMI_IFRAME_SLOT_AVI 1
+
+#define XCAT(prefix, x, suffix) prefix ## x ## suffix
+#define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD)
+#define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0)
+#define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1)
+#define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2)
+#define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3)
+#define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4)
+#define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5)
+#define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6)
+
+#define HDMI_IFRAME_DISABLED 0x0
+#define HDMI_IFRAME_SINGLE_SHOT 0x1
+#define HDMI_IFRAME_FIELD 0x2
+#define HDMI_IFRAME_FRAME 0x3
+#define HDMI_IFRAME_MASK 0x3
+#define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */
+
+#define HDMI_CFG_DEVICE_EN BIT(0)
+#define HDMI_CFG_HDMI_NOT_DVI BIT(1)
+#define HDMI_CFG_HDCP_EN BIT(2)
+#define HDMI_CFG_ESS_NOT_OESS BIT(3)
+#define HDMI_CFG_H_SYNC_POL_NEG BIT(4)
+#define HDMI_CFG_SINK_TERM_DET_EN BIT(5)
+#define HDMI_CFG_V_SYNC_POL_NEG BIT(6)
+#define HDMI_CFG_422_EN BIT(8)
+#define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12)
+#define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13)
+#define HDMI_CFG_SW_RST_EN BIT(31)
+
+#define HDMI_INT_GLOBAL BIT(0)
+#define HDMI_INT_SW_RST BIT(1)
+#define HDMI_INT_PIX_CAP BIT(3)
+#define HDMI_INT_HOT_PLUG BIT(4)
+#define HDMI_INT_DLL_LCK BIT(5)
+#define HDMI_INT_NEW_FRAME BIT(6)
+#define HDMI_INT_GENCTRL_PKT BIT(7)
+#define HDMI_INT_SINK_TERM_PRESENT BIT(11)
+
+#define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
+ | HDMI_INT_DLL_LCK \
+ | HDMI_INT_HOT_PLUG \
+ | HDMI_INT_GLOBAL)
+
+#define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
+ | HDMI_INT_GENCTRL_PKT \
+ | HDMI_INT_NEW_FRAME \
+ | HDMI_INT_DLL_LCK \
+ | HDMI_INT_HOT_PLUG \
+ | HDMI_INT_PIX_CAP \
+ | HDMI_INT_SW_RST \
+ | HDMI_INT_GLOBAL)
+
+#define HDMI_STA_SW_RST BIT(1)
+
+struct sti_hdmi_connector {
+ struct drm_connector drm_connector;
+ struct drm_encoder *encoder;
+ struct sti_hdmi *hdmi;
+};
+
+#define to_sti_hdmi_connector(x) \
+ container_of(x, struct sti_hdmi_connector, drm_connector)
+
+u32 hdmi_read(struct sti_hdmi *hdmi, int offset)
+{
+ return readl(hdmi->regs + offset);
+}
+
+void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset)
+{
+ writel(val, hdmi->regs + offset);
+}
+
+/**
+ * HDMI interrupt handler threaded
+ *
+ * @irq: irq number
+ * @arg: connector structure
+ */
+static irqreturn_t hdmi_irq_thread(int irq, void *arg)
+{
+ struct sti_hdmi *hdmi = arg;
+
+ /* Hot plug/unplug IRQ */
+ if (hdmi->irq_status & HDMI_INT_HOT_PLUG) {
+ /* read gpio to get the status */
+ hdmi->hpd = gpio_get_value(hdmi->hpd_gpio);
+ if (hdmi->drm_dev)
+ drm_helper_hpd_irq_event(hdmi->drm_dev);
+ }
+
+ /* Sw reset and PLL lock are exclusive so we can use the same
+ * event to signal them
+ */
+ if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) {
+ hdmi->event_received = true;
+ wake_up_interruptible(&hdmi->wait_event);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * HDMI interrupt handler
+ *
+ * @irq: irq number
+ * @arg: connector structure
+ */
+static irqreturn_t hdmi_irq(int irq, void *arg)
+{
+ struct sti_hdmi *hdmi = arg;
+
+ /* read interrupt status */
+ hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA);
+
+ /* clear interrupt status */
+ hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR);
+
+ /* force sync bus write */
+ hdmi_read(hdmi, HDMI_INT_STA);
+
+ return IRQ_WAKE_THREAD;
+}
+
+/**
+ * Set hdmi active area depending on the drm display mode selected
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ */
+static void hdmi_active_area(struct sti_hdmi *hdmi)
+{
+ u32 xmin, xmax;
+ u32 ymin, ymax;
+
+ xmin = sti_vtg_get_pixel_number(hdmi->mode, 0);
+ xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay - 1);
+ ymin = sti_vtg_get_line_number(hdmi->mode, 0);
+ ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1);
+
+ hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN);
+ hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX);
+ hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN);
+ hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX);
+}
+
+/**
+ * Overall hdmi configuration
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ */
+static void hdmi_config(struct sti_hdmi *hdmi)
+{
+ u32 conf;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ /* Clear overrun and underrun fifo */
+ conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR;
+
+ /* Enable HDMI mode not DVI */
+ conf |= HDMI_CFG_HDMI_NOT_DVI | HDMI_CFG_ESS_NOT_OESS;
+
+ /* Enable sink term detection */
+ conf |= HDMI_CFG_SINK_TERM_DET_EN;
+
+ /* Set Hsync polarity */
+ if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) {
+ DRM_DEBUG_DRIVER("H Sync Negative\n");
+ conf |= HDMI_CFG_H_SYNC_POL_NEG;
+ }
+
+ /* Set Vsync polarity */
+ if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) {
+ DRM_DEBUG_DRIVER("V Sync Negative\n");
+ conf |= HDMI_CFG_V_SYNC_POL_NEG;
+ }
+
+ /* Enable HDMI */
+ conf |= HDMI_CFG_DEVICE_EN;
+
+ hdmi_write(hdmi, conf, HDMI_CFG);
+}
+
+/**
+ * Prepare and configure the AVI infoframe
+ *
+ * AVI infoframe are transmitted at least once per two video field and
+ * contains information about HDMI transmission mode such as color space,
+ * colorimetry, ...
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ *
+ * Return negative value if error occurs
+ */
+static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
+{
+ struct drm_display_mode *mode = &hdmi->mode;
+ struct hdmi_avi_infoframe infoframe;
+ u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
+ u8 *frame = buffer + HDMI_INFOFRAME_HEADER_SIZE;
+ u32 val;
+ int ret;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe, mode);
+ if (ret < 0) {
+ DRM_ERROR("failed to setup AVI infoframe: %d\n", ret);
+ return ret;
+ }
+
+ /* 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;
+
+ ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer));
+ if (ret < 0) {
+ DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
+ return ret;
+ }
+
+ /* Disable transmission slot for AVI infoframe */
+ val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
+ val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, HDMI_IFRAME_SLOT_AVI);
+ hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
+
+ /* Infoframe header */
+ val = buffer[0x0];
+ val |= buffer[0x1] << 8;
+ val |= buffer[0x2] << 16;
+ hdmi_write(hdmi, val, HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI));
+
+ /* Infoframe packet bytes */
+ val = frame[0x0];
+ val |= frame[0x1] << 8;
+ val |= frame[0x2] << 16;
+ val |= frame[0x3] << 24;
+ hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI));
+
+ val = frame[0x4];
+ val |= frame[0x5] << 8;
+ val |= frame[0x6] << 16;
+ val |= frame[0x7] << 24;
+ hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD1(HDMI_IFRAME_SLOT_AVI));
+
+ val = frame[0x8];
+ val |= frame[0x9] << 8;
+ val |= frame[0xA] << 16;
+ val |= frame[0xB] << 24;
+ hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD2(HDMI_IFRAME_SLOT_AVI));
+
+ val = frame[0xC];
+ val |= frame[0xD] << 8;
+ hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD3(HDMI_IFRAME_SLOT_AVI));
+
+ /* Enable transmission slot for AVI infoframe
+ * According to the hdmi specification, AVI infoframe should be
+ * transmitted at least once per two video fields
+ */
+ val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
+ val |= HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_FIELD, HDMI_IFRAME_SLOT_AVI);
+ hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
+
+ return 0;
+}
+
+/**
+ * Software reset of the hdmi subsystem
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ *
+ */
+#define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */
+static void hdmi_swreset(struct sti_hdmi *hdmi)
+{
+ u32 val;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ /* Enable hdmi_audio clock only during hdmi reset */
+ if (clk_prepare_enable(hdmi->clk_audio))
+ DRM_INFO("Failed to prepare/enable hdmi_audio clk\n");
+
+ /* Sw reset */
+ hdmi->event_received = false;
+
+ val = hdmi_read(hdmi, HDMI_CFG);
+ val |= HDMI_CFG_SW_RST_EN;
+ hdmi_write(hdmi, val, HDMI_CFG);
+
+ /* Wait reset completed */
+ wait_event_interruptible_timeout(hdmi->wait_event,
+ hdmi->event_received == true,
+ msecs_to_jiffies
+ (HDMI_TIMEOUT_SWRESET));
+
+ /*
+ * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is
+ * set to '1' and clk_audio is running.
+ */
+ if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0)
+ DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n");
+
+ val = hdmi_read(hdmi, HDMI_CFG);
+ val &= ~HDMI_CFG_SW_RST_EN;
+ hdmi_write(hdmi, val, HDMI_CFG);
+
+ /* Disable hdmi_audio clock. Not used anymore for drm purpose */
+ clk_disable_unprepare(hdmi->clk_audio);
+}
+
+static void sti_hdmi_disable(struct drm_bridge *bridge)
+{
+ struct sti_hdmi *hdmi = bridge->driver_private;
+
+ u32 val = hdmi_read(hdmi, HDMI_CFG);
+
+ if (!hdmi->enabled)
+ return;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ /* Disable HDMI */
+ val &= ~HDMI_CFG_DEVICE_EN;
+ hdmi_write(hdmi, val, HDMI_CFG);
+
+ hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR);
+
+ /* Stop the phy */
+ hdmi->phy_ops->stop(hdmi);
+
+ /* Set the default channel data to be a dark red */
+ hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
+ hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT);
+ hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT);
+
+ /* Disable/unprepare hdmi clock */
+ clk_disable_unprepare(hdmi->clk_phy);
+ clk_disable_unprepare(hdmi->clk_tmds);
+ clk_disable_unprepare(hdmi->clk_pix);
+
+ hdmi->enabled = false;
+}
+
+static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
+{
+ struct sti_hdmi *hdmi = bridge->driver_private;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ if (hdmi->enabled)
+ return;
+
+ /* Prepare/enable clocks */
+ if (clk_prepare_enable(hdmi->clk_pix))
+ DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n");
+ if (clk_prepare_enable(hdmi->clk_tmds))
+ DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n");
+ if (clk_prepare_enable(hdmi->clk_phy))
+ DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n");
+
+ hdmi->enabled = true;
+
+ /* Program hdmi serializer and start phy */
+ if (!hdmi->phy_ops->start(hdmi)) {
+ DRM_ERROR("Unable to start hdmi phy\n");
+ return;
+ }
+
+ /* Program hdmi active area */
+ hdmi_active_area(hdmi);
+
+ /* Enable working interrupts */
+ hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN);
+
+ /* Program hdmi config */
+ hdmi_config(hdmi);
+
+ /* Program AVI infoframe */
+ if (hdmi_avi_infoframe_config(hdmi))
+ DRM_ERROR("Unable to configure AVI infoframe\n");
+
+ /* Sw reset */
+ hdmi_swreset(hdmi);
+}
+
+static void sti_hdmi_set_mode(struct drm_bridge *bridge,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct sti_hdmi *hdmi = bridge->driver_private;
+ int ret;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ /* Copy the drm display mode in the connector local structure */
+ memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode));
+
+ /* Update clock framerate according to the selected mode */
+ ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000);
+ if (ret < 0) {
+ DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n",
+ mode->clock * 1000);
+ return;
+ }
+ ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000);
+ if (ret < 0) {
+ DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n",
+ mode->clock * 1000);
+ return;
+ }
+}
+
+static void sti_hdmi_bridge_nope(struct drm_bridge *bridge)
+{
+ /* do nothing */
+}
+
+static void sti_hdmi_brigde_destroy(struct drm_bridge *bridge)
+{
+ drm_bridge_cleanup(bridge);
+ kfree(bridge);
+}
+
+static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = {
+ .pre_enable = sti_hdmi_pre_enable,
+ .enable = sti_hdmi_bridge_nope,
+ .disable = sti_hdmi_disable,
+ .post_disable = sti_hdmi_bridge_nope,
+ .mode_set = sti_hdmi_set_mode,
+ .destroy = sti_hdmi_brigde_destroy,
+};
+
+static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
+{
+ struct i2c_adapter *i2c_adap;
+ struct edid *edid;
+ int count;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ i2c_adap = i2c_get_adapter(1);
+ if (!i2c_adap)
+ goto fail;
+
+ edid = drm_get_edid(connector, i2c_adap);
+ if (!edid)
+ goto fail;
+
+ count = drm_add_edid_modes(connector, edid);
+ drm_mode_connector_update_edid_property(connector, edid);
+
+ kfree(edid);
+ return count;
+
+fail:
+ DRM_ERROR("Can not read HDMI EDID\n");
+ return 0;
+}
+
+#define CLK_TOLERANCE_HZ 50
+
+static int sti_hdmi_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ int target = mode->clock * 1000;
+ int target_min = target - CLK_TOLERANCE_HZ;
+ int target_max = target + CLK_TOLERANCE_HZ;
+ int result;
+ struct sti_hdmi_connector *hdmi_connector
+ = to_sti_hdmi_connector(connector);
+ struct sti_hdmi *hdmi = hdmi_connector->hdmi;
+
+
+ result = clk_round_rate(hdmi->clk_pix, target);
+
+ DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
+ target, result);
+
+ if ((result < target_min) || (result > target_max)) {
+ DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target);
+ return MODE_BAD;
+ }
+
+ return MODE_OK;
+}
+
+struct drm_encoder *sti_hdmi_best_encoder(struct drm_connector *connector)
+{
+ struct sti_hdmi_connector *hdmi_connector
+ = to_sti_hdmi_connector(connector);
+
+ /* Best encoder is the one associated during connector creation */
+ return hdmi_connector->encoder;
+}
+
+static struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = {
+ .get_modes = sti_hdmi_connector_get_modes,
+ .mode_valid = sti_hdmi_connector_mode_valid,
+ .best_encoder = sti_hdmi_best_encoder,
+};
+
+/* get detection status of display device */
+static enum drm_connector_status
+sti_hdmi_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct sti_hdmi_connector *hdmi_connector
+ = to_sti_hdmi_connector(connector);
+ struct sti_hdmi *hdmi = hdmi_connector->hdmi;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ if (hdmi->hpd) {
+ DRM_DEBUG_DRIVER("hdmi cable connected\n");
+ return connector_status_connected;
+ }
+
+ DRM_DEBUG_DRIVER("hdmi cable disconnected\n");
+ return connector_status_disconnected;
+}
+
+static void sti_hdmi_connector_destroy(struct drm_connector *connector)
+{
+ struct sti_hdmi_connector *hdmi_connector
+ = to_sti_hdmi_connector(connector);
+
+ drm_connector_unregister(connector);
+ drm_connector_cleanup(connector);
+ kfree(hdmi_connector);
+}
+
+static struct drm_connector_funcs sti_hdmi_connector_funcs = {
+ .dpms = drm_helper_connector_dpms,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = sti_hdmi_connector_detect,
+ .destroy = sti_hdmi_connector_destroy,
+};
+
+static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
+{
+ struct drm_encoder *encoder;
+
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+ if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
+ return encoder;
+ }
+
+ return NULL;
+}
+
+static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
+{
+ struct sti_hdmi *hdmi = dev_get_drvdata(dev);
+ struct drm_device *drm_dev = data;
+ struct drm_encoder *encoder;
+ struct sti_hdmi_connector *connector;
+ struct drm_connector *drm_connector;
+ struct drm_bridge *bridge;
+ struct i2c_adapter *i2c_adap;
+ int err;
+
+ i2c_adap = i2c_get_adapter(1);
+ if (!i2c_adap)
+ return -EPROBE_DEFER;
+
+ /* Set the drm device handle */
+ hdmi->drm_dev = drm_dev;
+
+ encoder = sti_hdmi_find_encoder(drm_dev);
+ if (!encoder)
+ return -ENOMEM;
+
+ connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
+ if (!connector)
+ return -ENOMEM;
+
+ connector->hdmi = hdmi;
+
+ bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
+ if (!bridge)
+ return -ENOMEM;
+
+ bridge->driver_private = hdmi;
+ drm_bridge_init(drm_dev, bridge, &sti_hdmi_bridge_funcs);
+
+ encoder->bridge = bridge;
+ connector->encoder = encoder;
+
+ drm_connector = (struct drm_connector *)connector;
+
+ drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+ drm_connector_init(drm_dev, drm_connector,
+ &sti_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA);
+ drm_connector_helper_add(drm_connector,
+ &sti_hdmi_connector_helper_funcs);
+
+ err = drm_connector_register(drm_connector);
+ if (err)
+ goto err_connector;
+
+ err = drm_mode_connector_attach_encoder(drm_connector, encoder);
+ if (err) {
+ DRM_ERROR("Failed to attach a connector to a encoder\n");
+ goto err_sysfs;
+ }
+
+ /* Enable default interrupts */
+ hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
+
+ return 0;
+
+err_sysfs:
+ drm_connector_unregister(drm_connector);
+err_connector:
+ drm_bridge_cleanup(bridge);
+ drm_connector_cleanup(drm_connector);
+ return -EINVAL;
+}
+
+static void sti_hdmi_unbind(struct device *dev,
+ struct device *master, void *data)
+{
+ /* do nothing */
+}
+
+static const struct component_ops sti_hdmi_ops = {
+ .bind = sti_hdmi_bind,
+ .unbind = sti_hdmi_unbind,
+};
+
+static struct of_device_id hdmi_of_match[] = {
+ {
+ .compatible = "st,stih416-hdmi",
+ .data = &tx3g0c55phy_ops,
+ }, {
+ .compatible = "st,stih407-hdmi",
+ .data = &tx3g4c28phy_ops,
+ }, {
+ /* end node */
+ }
+};
+MODULE_DEVICE_TABLE(of, hdmi_of_match);
+
+static int sti_hdmi_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sti_hdmi *hdmi;
+ struct device_node *np = dev->of_node;
+ struct resource *res;
+ int ret;
+
+ DRM_INFO("%s\n", __func__);
+
+ hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
+ if (!hdmi)
+ return -ENOMEM;
+
+ hdmi->dev = pdev->dev;
+
+ /* Get resources */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg");
+ if (!res) {
+ DRM_ERROR("Invalid hdmi resource\n");
+ return -ENOMEM;
+ }
+ hdmi->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
+ if (IS_ERR(hdmi->regs))
+ return PTR_ERR(hdmi->regs);
+
+ if (of_device_is_compatible(np, "st,stih416-hdmi")) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "syscfg");
+ if (!res) {
+ DRM_ERROR("Invalid syscfg resource\n");
+ return -ENOMEM;
+ }
+ hdmi->syscfg = devm_ioremap_nocache(dev, res->start,
+ resource_size(res));
+ if (IS_ERR(hdmi->syscfg))
+ return PTR_ERR(hdmi->syscfg);
+
+ }
+
+ hdmi->phy_ops = (struct hdmi_phy_ops *)
+ of_match_node(hdmi_of_match, np)->data;
+
+ /* Get clock resources */
+ hdmi->clk_pix = devm_clk_get(dev, "pix");
+ if (IS_ERR(hdmi->clk_pix)) {
+ DRM_ERROR("Cannot get hdmi_pix clock\n");
+ return PTR_ERR(hdmi->clk_pix);
+ }
+
+ hdmi->clk_tmds = devm_clk_get(dev, "tmds");
+ if (IS_ERR(hdmi->clk_tmds)) {
+ DRM_ERROR("Cannot get hdmi_tmds clock\n");
+ return PTR_ERR(hdmi->clk_tmds);
+ }
+
+ hdmi->clk_phy = devm_clk_get(dev, "phy");
+ if (IS_ERR(hdmi->clk_phy)) {
+ DRM_ERROR("Cannot get hdmi_phy clock\n");
+ return PTR_ERR(hdmi->clk_phy);
+ }
+
+ hdmi->clk_audio = devm_clk_get(dev, "audio");
+ if (IS_ERR(hdmi->clk_audio)) {
+ DRM_ERROR("Cannot get hdmi_audio clock\n");
+ return PTR_ERR(hdmi->clk_audio);
+ }
+
+ hdmi->hpd_gpio = of_get_named_gpio(np, "hdmi,hpd-gpio", 0);
+ if (hdmi->hpd_gpio < 0) {
+ DRM_ERROR("Failed to get hdmi hpd-gpio\n");
+ return -EIO;
+ }
+
+ hdmi->hpd = gpio_get_value(hdmi->hpd_gpio);
+
+ init_waitqueue_head(&hdmi->wait_event);
+
+ hdmi->irq = platform_get_irq_byname(pdev, "irq");
+
+ ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq,
+ hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi);
+ if (ret) {
+ DRM_ERROR("Failed to register HDMI interrupt\n");
+ return ret;
+ }
+
+ hdmi->reset = devm_reset_control_get(dev, "hdmi");
+ /* Take hdmi out of reset */
+ if (!IS_ERR(hdmi->reset))
+ reset_control_deassert(hdmi->reset);
+
+ platform_set_drvdata(pdev, hdmi);
+
+ return component_add(&pdev->dev, &sti_hdmi_ops);
+}
+
+static int sti_hdmi_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &sti_hdmi_ops);
+ return 0;
+}
+
+struct platform_driver sti_hdmi_driver = {
+ .driver = {
+ .name = "sti-hdmi",
+ .owner = THIS_MODULE,
+ .of_match_table = hdmi_of_match,
+ },
+ .probe = sti_hdmi_probe,
+ .remove = sti_hdmi_remove,
+};
+
+module_platform_driver(sti_hdmi_driver);
+
+MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#ifndef _STI_HDMI_H_
+#define _STI_HDMI_H_
+
+#include <linux/platform_device.h>
+
+#include <drm/drmP.h>
+
+#define HDMI_STA 0x0010
+#define HDMI_STA_DLL_LCK BIT(5)
+
+struct sti_hdmi;
+
+struct hdmi_phy_ops {
+ bool (*start)(struct sti_hdmi *hdmi);
+ void (*stop)(struct sti_hdmi *hdmi);
+};
+
+/**
+ * STI hdmi structure
+ *
+ * @dev: driver device
+ * @drm_dev: pointer to drm device
+ * @mode: current display mode selected
+ * @regs: hdmi register
+ * @syscfg: syscfg register for pll rejection configuration
+ * @clk_pix: hdmi pixel clock
+ * @clk_tmds: hdmi tmds clock
+ * @clk_phy: hdmi phy clock
+ * @clk_audio: hdmi audio clock
+ * @irq: hdmi interrupt number
+ * @irq_status: interrupt status register
+ * @phy_ops: phy start/stop operations
+ * @enabled: true if hdmi is enabled else false
+ * @hpd_gpio: hdmi hot plug detect gpio number
+ * @hpd: hot plug detect status
+ * @wait_event: wait event
+ * @event_received: wait event status
+ * @reset: reset control of the hdmi phy
+ */
+struct sti_hdmi {
+ struct device dev;
+ struct drm_device *drm_dev;
+ struct drm_display_mode mode;
+ void __iomem *regs;
+ void __iomem *syscfg;
+ struct clk *clk_pix;
+ struct clk *clk_tmds;
+ struct clk *clk_phy;
+ struct clk *clk_audio;
+ int irq;
+ u32 irq_status;
+ struct hdmi_phy_ops *phy_ops;
+ bool enabled;
+ int hpd_gpio;
+ bool hpd;
+ wait_queue_head_t wait_event;
+ bool event_received;
+ struct reset_control *reset;
+};
+
+u32 hdmi_read(struct sti_hdmi *hdmi, int offset);
+void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset);
+
+/**
+ * hdmi phy config structure
+ *
+ * A pointer to an array of these structures is passed to a TMDS (HDMI) output
+ * via the control interface to provide board and SoC specific
+ * configurations of the HDMI PHY. Each entry in the array specifies a hardware
+ * specific configuration for a given TMDS clock frequency range.
+ *
+ * @min_tmds_freq: Lower bound of TMDS clock frequency this entry applies to
+ * @max_tmds_freq: Upper bound of TMDS clock frequency this entry applies to
+ * @config: SoC specific register configuration
+ */
+struct hdmi_phy_config {
+ u32 min_tmds_freq;
+ u32 max_tmds_freq;
+ u32 config[4];
+};
+
+#endif
new file mode 100644
@@ -0,0 +1,336 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include "sti_hdmi_tx3g0c55phy.h"
+
+#define HDMI_SRZ_PLL_CFG 0x0504
+#define HDMI_SRZ_TAP_1 0x0508
+#define HDMI_SRZ_TAP_2 0x050C
+#define HDMI_SRZ_TAP_3 0x0510
+#define HDMI_SRZ_CTRL 0x0514
+
+#define HDMI_SRZ_PLL_CFG_POWER_DOWN BIT(0)
+#define HDMI_SRZ_PLL_CFG_VCOR_SHIFT 1
+#define HDMI_SRZ_PLL_CFG_VCOR_425MHZ 0
+#define HDMI_SRZ_PLL_CFG_VCOR_850MHZ 1
+#define HDMI_SRZ_PLL_CFG_VCOR_1700MHZ 2
+#define HDMI_SRZ_PLL_CFG_VCOR_3000MHZ 3
+#define HDMI_SRZ_PLL_CFG_VCOR_MASK 3
+#define HDMI_SRZ_PLL_CFG_VCOR(x) (x << HDMI_SRZ_PLL_CFG_VCOR_SHIFT)
+#define HDMI_SRZ_PLL_CFG_NDIV_SHIFT 8
+#define HDMI_SRZ_PLL_CFG_NDIV_MASK (0x1F << HDMI_SRZ_PLL_CFG_NDIV_SHIFT)
+#define HDMI_SRZ_PLL_CFG_MODE_SHIFT 16
+#define HDMI_SRZ_PLL_CFG_MODE_13_5_MHZ 0x1
+#define HDMI_SRZ_PLL_CFG_MODE_25_2_MHZ 0x4
+#define HDMI_SRZ_PLL_CFG_MODE_27_MHZ 0x5
+#define HDMI_SRZ_PLL_CFG_MODE_33_75_MHZ 0x6
+#define HDMI_SRZ_PLL_CFG_MODE_40_5_MHZ 0x7
+#define HDMI_SRZ_PLL_CFG_MODE_54_MHZ 0x8
+#define HDMI_SRZ_PLL_CFG_MODE_67_5_MHZ 0x9
+#define HDMI_SRZ_PLL_CFG_MODE_74_25_MHZ 0xA
+#define HDMI_SRZ_PLL_CFG_MODE_81_MHZ 0xB
+#define HDMI_SRZ_PLL_CFG_MODE_82_5_MHZ 0xC
+#define HDMI_SRZ_PLL_CFG_MODE_108_MHZ 0xD
+#define HDMI_SRZ_PLL_CFG_MODE_148_5_MHZ 0xE
+#define HDMI_SRZ_PLL_CFG_MODE_165_MHZ 0xF
+#define HDMI_SRZ_PLL_CFG_MODE_MASK 0xF
+#define HDMI_SRZ_PLL_CFG_MODE(x) (x << HDMI_SRZ_PLL_CFG_MODE_SHIFT)
+
+#define HDMI_SRZ_CTRL_POWER_DOWN (1 << 0)
+#define HDMI_SRZ_CTRL_EXTERNAL_DATA_EN (1 << 1)
+
+/* sysconf registers */
+#define HDMI_REJECTION_PLL_CONFIGURATION 0x0858 /* SYSTEM_CONFIG2534 */
+#define HDMI_REJECTION_PLL_STATUS 0x0948 /* SYSTEM_CONFIG2594 */
+
+#define REJECTION_PLL_HDMI_ENABLE_SHIFT 0
+#define REJECTION_PLL_HDMI_ENABLE_MASK (0x1 << REJECTION_PLL_HDMI_ENABLE_SHIFT)
+#define REJECTION_PLL_HDMI_PDIV_SHIFT 24
+#define REJECTION_PLL_HDMI_PDIV_MASK (0x7 << REJECTION_PLL_HDMI_PDIV_SHIFT)
+#define REJECTION_PLL_HDMI_NDIV_SHIFT 16
+#define REJECTION_PLL_HDMI_NDIV_MASK (0xFF << REJECTION_PLL_HDMI_NDIV_SHIFT)
+#define REJECTION_PLL_HDMI_MDIV_SHIFT 8
+#define REJECTION_PLL_HDMI_MDIV_MASK (0xFF << REJECTION_PLL_HDMI_MDIV_SHIFT)
+
+#define REJECTION_PLL_HDMI_REJ_PLL_LOCK BIT(0)
+
+#define HDMI_TIMEOUT_PLL_LOCK 50 /*milliseconds */
+
+/**
+ * pll mode structure
+ *
+ * A pointer to an array of these structures is passed to a TMDS (HDMI) output
+ * via the control interface to provide board and SoC specific
+ * configurations of the HDMI PHY. Each entry in the array specifies a hardware
+ * specific configuration for a given TMDS clock frequency range. The array
+ * should be terminated with an entry that has all fields set to zero.
+ *
+ * @min: Lower bound of TMDS clock frequency this entry applies to
+ * @max: Upper bound of TMDS clock frequency this entry applies to
+ * @mode: SoC specific register configuration
+ */
+struct pllmode {
+ u32 min;
+ u32 max;
+ u32 mode;
+};
+
+#define NB_PLL_MODE 7
+static struct pllmode pllmodes[NB_PLL_MODE] = {
+ {13500000, 13513500, HDMI_SRZ_PLL_CFG_MODE_13_5_MHZ},
+ {25174800, 25200000, HDMI_SRZ_PLL_CFG_MODE_25_2_MHZ},
+ {27000000, 27027000, HDMI_SRZ_PLL_CFG_MODE_27_MHZ},
+ {54000000, 54054000, HDMI_SRZ_PLL_CFG_MODE_54_MHZ},
+ {72000000, 74250000, HDMI_SRZ_PLL_CFG_MODE_74_25_MHZ},
+ {108000000, 108108000, HDMI_SRZ_PLL_CFG_MODE_108_MHZ},
+ {148351648, 297000000, HDMI_SRZ_PLL_CFG_MODE_148_5_MHZ}
+};
+
+#define NB_HDMI_PHY_CONFIG 5
+static struct hdmi_phy_config hdmiphy_config[NB_HDMI_PHY_CONFIG] = {
+ {0, 40000000, {0x00101010, 0x00101010, 0x00101010, 0x02} },
+ {40000000, 140000000, {0x00111111, 0x00111111, 0x00111111, 0x02} },
+ {140000000, 160000000, {0x00131313, 0x00101010, 0x00101010, 0x02} },
+ {160000000, 250000000, {0x00131313, 0x00111111, 0x00111111, 0x03FE} },
+ {250000000, 300000000, {0x00151515, 0x00101010, 0x00101010, 0x03FE} },
+};
+
+#define PLL_CHANGE_DELAY 1 /* ms */
+
+/**
+ * Disable the pll rejection
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ *
+ * return true if the pll has been disabled
+ */
+static bool disable_pll_rejection(struct sti_hdmi *hdmi)
+{
+ u32 val;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ val = readl(hdmi->syscfg + HDMI_REJECTION_PLL_CONFIGURATION);
+ val &= ~REJECTION_PLL_HDMI_ENABLE_MASK;
+ writel(val, hdmi->syscfg + HDMI_REJECTION_PLL_CONFIGURATION);
+
+ msleep(PLL_CHANGE_DELAY);
+ val = readl(hdmi->syscfg + HDMI_REJECTION_PLL_STATUS);
+
+ return !(val & REJECTION_PLL_HDMI_REJ_PLL_LOCK);
+}
+
+/**
+ * Enable the old BCH/rejection PLL is now reused to provide the CLKPXPLL
+ * clock input to the new PHY PLL that generates the serializer clock
+ * (TMDS*10) and the TMDS clock which is now fed back into the HDMI
+ * formatter instead of the TMDS clock line from ClockGenB.
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ *
+ * return true if pll has been correctly set
+ */
+static bool enable_pll_rejection(struct sti_hdmi *hdmi)
+{
+ unsigned int inputclock;
+ u32 mdiv, ndiv, pdiv, val;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ if (!disable_pll_rejection(hdmi))
+ return false;
+
+ inputclock = hdmi->mode.clock * 1000;
+
+ DRM_DEBUG_DRIVER("hdmi rejection pll input clock = %dHz\n", inputclock);
+
+
+ /* Power up the HDMI rejection PLL
+ * Note: On this SoC (stiH416) we are forced to have the input clock
+ * be equal to the HDMI pixel clock.
+ *
+ * The values here have been suggested by validation however they are
+ * still provisional and subject to change.
+ *
+ * PLLout = (Fin*Mdiv) / ((2 * Ndiv) / 2^Pdiv)
+ */
+ if (inputclock < 50000000) {
+ /*
+ * For slower clocks we need to multiply more to keep the
+ * internal VCO frequency within the physical specification
+ * of the PLL.
+ */
+ pdiv = 4;
+ ndiv = 240;
+ mdiv = 30;
+ } else {
+ pdiv = 2;
+ ndiv = 60;
+ mdiv = 30;
+ }
+
+ val = readl(hdmi->syscfg + HDMI_REJECTION_PLL_CONFIGURATION);
+
+ val &= ~(REJECTION_PLL_HDMI_PDIV_MASK |
+ REJECTION_PLL_HDMI_NDIV_MASK |
+ REJECTION_PLL_HDMI_MDIV_MASK |
+ REJECTION_PLL_HDMI_ENABLE_MASK);
+
+ val |= (pdiv << REJECTION_PLL_HDMI_PDIV_SHIFT) |
+ (ndiv << REJECTION_PLL_HDMI_NDIV_SHIFT) |
+ (mdiv << REJECTION_PLL_HDMI_MDIV_SHIFT) |
+ (0x1 << REJECTION_PLL_HDMI_ENABLE_SHIFT);
+
+ writel(val, hdmi->syscfg + HDMI_REJECTION_PLL_CONFIGURATION);
+
+ msleep(PLL_CHANGE_DELAY);
+ val = readl(hdmi->syscfg + HDMI_REJECTION_PLL_STATUS);
+
+ return (val & REJECTION_PLL_HDMI_REJ_PLL_LOCK);
+}
+
+/**
+ * Start hdmi phy macro cell tx3g0c55
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ *
+ * Return false if an error occur
+ */
+static bool sti_hdmi_tx3g0c55phy_start(struct sti_hdmi *hdmi)
+{
+ u32 ckpxpll = hdmi->mode.clock * 1000;
+ u32 val, tmdsck, freqvco, pllctrl = 0;
+ unsigned int i;
+
+ if (!enable_pll_rejection(hdmi))
+ return false;
+
+ DRM_DEBUG_DRIVER("ckpxpll = %dHz\n", ckpxpll);
+
+ /* Assuming no pixel repetition and 24bits color */
+ tmdsck = ckpxpll;
+ pllctrl = 2 << HDMI_SRZ_PLL_CFG_NDIV_SHIFT;
+
+ /*
+ * Setup the PLL mode parameter based on the ckpxpll. If we haven't got
+ * a clock frequency supported by one of the specific PLL modes then we
+ * will end up using the generic mode (0) which only supports a 10x
+ * multiplier, hence only 24bit color.
+ */
+ for (i = 0; i < NB_PLL_MODE; i++) {
+ if (ckpxpll >= pllmodes[i].min && ckpxpll <= pllmodes[i].max)
+ pllctrl |= HDMI_SRZ_PLL_CFG_MODE(pllmodes[i].mode);
+ }
+
+ freqvco = tmdsck * 10;
+ if (freqvco <= 425000000UL)
+ pllctrl |= HDMI_SRZ_PLL_CFG_VCOR(HDMI_SRZ_PLL_CFG_VCOR_425MHZ);
+ else if (freqvco <= 850000000UL)
+ pllctrl |= HDMI_SRZ_PLL_CFG_VCOR(HDMI_SRZ_PLL_CFG_VCOR_850MHZ);
+ else if (freqvco <= 1700000000UL)
+ pllctrl |= HDMI_SRZ_PLL_CFG_VCOR(HDMI_SRZ_PLL_CFG_VCOR_1700MHZ);
+ else if (freqvco <= 2970000000UL)
+ pllctrl |= HDMI_SRZ_PLL_CFG_VCOR(HDMI_SRZ_PLL_CFG_VCOR_3000MHZ);
+ else {
+ DRM_ERROR("PHY serializer clock out of range\n");
+ goto err;
+ }
+
+ /*
+ * Configure and power up the PHY PLL
+ */
+ hdmi->event_received = false;
+ DRM_DEBUG_DRIVER("pllctrl = 0x%x\n", pllctrl);
+ hdmi_write(hdmi, pllctrl, HDMI_SRZ_PLL_CFG);
+
+ /* wait PLL interrupt */
+ wait_event_interruptible_timeout(hdmi->wait_event,
+ hdmi->event_received == true,
+ msecs_to_jiffies
+ (HDMI_TIMEOUT_PLL_LOCK));
+
+ if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_DLL_LCK) == 0) {
+ DRM_ERROR("hdmi phy pll not locked\n");
+ goto err;
+ }
+
+ DRM_DEBUG_DRIVER("got PHY PLL Lock\n");
+
+ /*
+ * To configure the source termination and pre-emphasis appropriately
+ * for different high speed TMDS clock frequencies a phy configuration
+ * table must be provided, tailored to the SoC and board combination.
+ */
+ for (i = 0; i < NB_HDMI_PHY_CONFIG; i++) {
+ if ((hdmiphy_config[i].min_tmds_freq <= tmdsck) &&
+ (hdmiphy_config[i].max_tmds_freq >= tmdsck)) {
+ val = hdmiphy_config[i].config[0];
+ hdmi_write(hdmi, val, HDMI_SRZ_TAP_1);
+ val = hdmiphy_config[i].config[1];
+ hdmi_write(hdmi, val, HDMI_SRZ_TAP_2);
+ val = hdmiphy_config[i].config[2];
+ hdmi_write(hdmi, val, HDMI_SRZ_TAP_3);
+ val = hdmiphy_config[i].config[3];
+ val |= HDMI_SRZ_CTRL_EXTERNAL_DATA_EN;
+ val &= ~HDMI_SRZ_CTRL_POWER_DOWN;
+ hdmi_write(hdmi, val, HDMI_SRZ_CTRL);
+
+ DRM_DEBUG_DRIVER("serializer cfg 0x%x 0x%x 0x%x 0x%x\n",
+ hdmiphy_config[i].config[0],
+ hdmiphy_config[i].config[1],
+ hdmiphy_config[i].config[2],
+ hdmiphy_config[i].config[3]);
+ return true;
+ }
+ }
+
+ /*
+ * Default, power up the serializer with no pre-emphasis or source
+ * termination.
+ */
+ hdmi_write(hdmi, 0x0, HDMI_SRZ_TAP_1);
+ hdmi_write(hdmi, 0x0, HDMI_SRZ_TAP_2);
+ hdmi_write(hdmi, 0x0, HDMI_SRZ_TAP_3);
+ hdmi_write(hdmi, HDMI_SRZ_CTRL_EXTERNAL_DATA_EN, HDMI_SRZ_CTRL);
+
+ return true;
+
+err:
+ disable_pll_rejection(hdmi);
+
+ return false;
+}
+
+/**
+ * Stop hdmi phy macro cell tx3g0c55
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ */
+static void sti_hdmi_tx3g0c55phy_stop(struct sti_hdmi *hdmi)
+{
+ DRM_DEBUG_DRIVER("\n");
+
+ hdmi->event_received = false;
+
+ hdmi_write(hdmi, HDMI_SRZ_CTRL_POWER_DOWN, HDMI_SRZ_CTRL);
+ hdmi_write(hdmi, HDMI_SRZ_PLL_CFG_POWER_DOWN, HDMI_SRZ_PLL_CFG);
+
+ /* wait PLL interrupt */
+ wait_event_interruptible_timeout(hdmi->wait_event,
+ hdmi->event_received == true,
+ msecs_to_jiffies
+ (HDMI_TIMEOUT_PLL_LOCK));
+
+ if (hdmi_read(hdmi, HDMI_STA) & HDMI_STA_DLL_LCK)
+ DRM_ERROR("hdmi phy pll not well disabled\n");
+
+ disable_pll_rejection(hdmi);
+}
+
+struct hdmi_phy_ops tx3g0c55phy_ops = {
+ .start = sti_hdmi_tx3g0c55phy_start,
+ .stop = sti_hdmi_tx3g0c55phy_stop,
+};
new file mode 100644
@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#ifndef _STI_HDMI_TX3G0C55PHY_H_
+#define _STI_HDMI_TX3G0C55PHY_H_
+
+#include "sti_hdmi.h"
+
+extern struct hdmi_phy_ops tx3g0c55phy_ops;
+
+#endif
new file mode 100644
@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include "sti_hdmi_tx3g4c28phy.h"
+
+#define HDMI_SRZ_CFG 0x504
+#define HDMI_SRZ_PLL_CFG 0x510
+#define HDMI_SRZ_ICNTL 0x518
+#define HDMI_SRZ_CALCODE_EXT 0x520
+
+#define HDMI_SRZ_CFG_EN BIT(0)
+#define HDMI_SRZ_CFG_DISABLE_BYPASS_SINK_CURRENT BIT(1)
+#define HDMI_SRZ_CFG_EXTERNAL_DATA BIT(16)
+#define HDMI_SRZ_CFG_RBIAS_EXT BIT(17)
+#define HDMI_SRZ_CFG_EN_SINK_TERM_DETECTION BIT(18)
+#define HDMI_SRZ_CFG_EN_BIASRES_DETECTION BIT(19)
+#define HDMI_SRZ_CFG_EN_SRC_TERMINATION BIT(24)
+
+#define HDMI_SRZ_CFG_INTERNAL_MASK (HDMI_SRZ_CFG_EN | \
+ HDMI_SRZ_CFG_DISABLE_BYPASS_SINK_CURRENT | \
+ HDMI_SRZ_CFG_EXTERNAL_DATA | \
+ HDMI_SRZ_CFG_RBIAS_EXT | \
+ HDMI_SRZ_CFG_EN_SINK_TERM_DETECTION | \
+ HDMI_SRZ_CFG_EN_BIASRES_DETECTION | \
+ HDMI_SRZ_CFG_EN_SRC_TERMINATION)
+
+#define PLL_CFG_EN BIT(0)
+#define PLL_CFG_NDIV_SHIFT (8)
+#define PLL_CFG_IDF_SHIFT (16)
+#define PLL_CFG_ODF_SHIFT (24)
+
+#define ODF_DIV_1 (0)
+#define ODF_DIV_2 (1)
+#define ODF_DIV_4 (2)
+#define ODF_DIV_8 (3)
+
+#define HDMI_TIMEOUT_PLL_LOCK 50 /*milliseconds */
+
+struct plldividers_s {
+ uint32_t min;
+ uint32_t max;
+ uint32_t idf;
+ uint32_t odf;
+};
+
+/*
+ * Functional specification recommended values
+ */
+#define NB_PLL_MODE 5
+static struct plldividers_s plldividers[NB_PLL_MODE] = {
+ {0, 20000000, 1, ODF_DIV_8},
+ {20000000, 42500000, 2, ODF_DIV_8},
+ {42500000, 85000000, 4, ODF_DIV_4},
+ {85000000, 170000000, 8, ODF_DIV_2},
+ {170000000, 340000000, 16, ODF_DIV_1}
+};
+
+#define NB_HDMI_PHY_CONFIG 2
+static struct hdmi_phy_config hdmiphy_config[NB_HDMI_PHY_CONFIG] = {
+ {0, 250000000, {0x0, 0x0, 0x0, 0x0} },
+ {250000000, 300000000, {0x1110, 0x0, 0x0, 0x0} },
+};
+
+/**
+ * Start hdmi phy macro cell tx3g4c28
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ *
+ * Return false if an error occur
+ */
+static bool sti_hdmi_tx3g4c28phy_start(struct sti_hdmi *hdmi)
+{
+ u32 ckpxpll = hdmi->mode.clock * 1000;
+ u32 val, tmdsck, idf, odf, pllctrl = 0;
+ bool foundplldivides = false;
+ int i;
+
+ DRM_DEBUG_DRIVER("ckpxpll = %dHz\n", ckpxpll);
+
+ for (i = 0; i < NB_PLL_MODE; i++) {
+ if (ckpxpll >= plldividers[i].min &&
+ ckpxpll < plldividers[i].max) {
+ idf = plldividers[i].idf;
+ odf = plldividers[i].odf;
+ foundplldivides = true;
+ break;
+ }
+ }
+
+ if (!foundplldivides) {
+ DRM_ERROR("input TMDS clock speed (%d) not supported\n",
+ ckpxpll);
+ goto err;
+ }
+
+ /* Assuming no pixel repetition and 24bits color */
+ tmdsck = ckpxpll;
+ pllctrl |= 40 << PLL_CFG_NDIV_SHIFT;
+
+ if (tmdsck > 340000000) {
+ DRM_ERROR("output TMDS clock (%d) out of range\n", tmdsck);
+ goto err;
+ }
+
+ pllctrl |= idf << PLL_CFG_IDF_SHIFT;
+ pllctrl |= odf << PLL_CFG_ODF_SHIFT;
+
+ /*
+ * Configure and power up the PHY PLL
+ */
+ hdmi->event_received = false;
+ DRM_DEBUG_DRIVER("pllctrl = 0x%x\n", pllctrl);
+ hdmi_write(hdmi, (pllctrl | PLL_CFG_EN), HDMI_SRZ_PLL_CFG);
+
+ /* wait PLL interrupt */
+ wait_event_interruptible_timeout(hdmi->wait_event,
+ hdmi->event_received == true,
+ msecs_to_jiffies
+ (HDMI_TIMEOUT_PLL_LOCK));
+
+ if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_DLL_LCK) == 0) {
+ DRM_ERROR("hdmi phy pll not locked\n");
+ goto err;
+ }
+
+ DRM_DEBUG_DRIVER("got PHY PLL Lock\n");
+
+ val = (HDMI_SRZ_CFG_EN |
+ HDMI_SRZ_CFG_EXTERNAL_DATA |
+ HDMI_SRZ_CFG_EN_BIASRES_DETECTION |
+ HDMI_SRZ_CFG_EN_SINK_TERM_DETECTION);
+
+ if (tmdsck > 165000000)
+ val |= HDMI_SRZ_CFG_EN_SRC_TERMINATION;
+
+ /*
+ * To configure the source termination and pre-emphasis appropriately
+ * for different high speed TMDS clock frequencies a phy configuration
+ * table must be provided, tailored to the SoC and board combination.
+ */
+ for (i = 0; i < NB_HDMI_PHY_CONFIG; i++) {
+ if ((hdmiphy_config[i].min_tmds_freq <= tmdsck) &&
+ (hdmiphy_config[i].max_tmds_freq >= tmdsck)) {
+ val |= (hdmiphy_config[i].config[0]
+ & ~HDMI_SRZ_CFG_INTERNAL_MASK);
+ hdmi_write(hdmi, val, HDMI_SRZ_CFG);
+
+ val = hdmiphy_config[i].config[1];
+ hdmi_write(hdmi, val, HDMI_SRZ_ICNTL);
+
+ val = hdmiphy_config[i].config[2];
+ hdmi_write(hdmi, val, HDMI_SRZ_CALCODE_EXT);
+
+ DRM_DEBUG_DRIVER("serializer cfg 0x%x 0x%x 0x%x\n",
+ hdmiphy_config[i].config[0],
+ hdmiphy_config[i].config[1],
+ hdmiphy_config[i].config[2]);
+ return true;
+ }
+ }
+
+ /*
+ * Default, power up the serializer with no pre-emphasis or
+ * output swing correction
+ */
+ hdmi_write(hdmi, val, HDMI_SRZ_CFG);
+ hdmi_write(hdmi, 0x0, HDMI_SRZ_ICNTL);
+ hdmi_write(hdmi, 0x0, HDMI_SRZ_CALCODE_EXT);
+
+ return true;
+
+err:
+ return false;
+}
+
+/**
+ * Stop hdmi phy macro cell tx3g4c28
+ *
+ * @hdmi: pointer on the hdmi internal structure
+ */
+static void sti_hdmi_tx3g4c28phy_stop(struct sti_hdmi *hdmi)
+{
+ int val = 0;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ hdmi->event_received = false;
+
+ val = HDMI_SRZ_CFG_EN_SINK_TERM_DETECTION;
+ val |= HDMI_SRZ_CFG_EN_BIASRES_DETECTION;
+
+ hdmi_write(hdmi, val, HDMI_SRZ_CFG);
+ hdmi_write(hdmi, 0, HDMI_SRZ_PLL_CFG);
+
+ /* wait PLL interrupt */
+ wait_event_interruptible_timeout(hdmi->wait_event,
+ hdmi->event_received == true,
+ msecs_to_jiffies
+ (HDMI_TIMEOUT_PLL_LOCK));
+
+ if (hdmi_read(hdmi, HDMI_STA) & HDMI_STA_DLL_LCK)
+ DRM_ERROR("hdmi phy pll not well disabled\n");
+}
+
+struct hdmi_phy_ops tx3g4c28phy_ops = {
+ .start = sti_hdmi_tx3g4c28phy_start,
+ .stop = sti_hdmi_tx3g4c28phy_stop,
+};
new file mode 100644
@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#ifndef _STI_HDMI_TX3G4C28PHY_H_
+#define _STI_HDMI_TX3G4C28PHY_H_
+
+#include "sti_hdmi.h"
+
+extern struct hdmi_phy_ops tx3g4c28phy_ops;
+
+#endif