@@ -6,7 +6,8 @@ config DRM_PL111
select DRM_KMS_HELPER
select DRM_KMS_CMA_HELPER
select DRM_GEM_CMA_HELPER
- select DRM_PANEL
+ select DRM_BRIDGE
+ select DRM_PANEL_BRIDGE
select VT_HW_CONSOLE_BINDING if FRAMEBUFFER_CONSOLE
help
Choose this option for DRM support for the PL111 CLCD controller.
@@ -1,5 +1,4 @@
-pl111_drm-y += pl111_connector.o \
- pl111_display.o \
+pl111_drm-y += pl111_display.o \
pl111_drv.o
pl111_drm-$(CONFIG_DEBUG_FS) += pl111_debugfs.o
deleted file mode 100644
@@ -1,127 +0,0 @@
-/*
- * (C) COPYRIGHT 2012-2013 ARM Limited. All rights reserved.
- *
- * Parts of this file were based on sources as follows:
- *
- * Copyright (c) 2006-2008 Intel Corporation
- * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
- * Copyright (C) 2011 Texas Instruments
- *
- * This program is free software and is provided to you under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation, and any use by you of this program is subject to the terms of
- * such GNU licence.
- *
- */
-
-/**
- * pl111_drm_connector.c
- * Implementation of the connector functions for PL111 DRM
- */
-#include <linux/amba/clcd-regs.h>
-#include <linux/version.h>
-#include <linux/shmem_fs.h>
-#include <linux/dma-buf.h>
-
-#include <drm/drmP.h>
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_of.h>
-#include <drm/drm_panel.h>
-
-#include "pl111_drm.h"
-
-static void pl111_connector_destroy(struct drm_connector *connector)
-{
- struct pl111_drm_connector *pl111_connector =
- to_pl111_connector(connector);
-
- if (pl111_connector->panel)
- drm_panel_detach(pl111_connector->panel);
-
- drm_connector_unregister(connector);
- drm_connector_cleanup(connector);
-}
-
-static enum drm_connector_status pl111_connector_detect(struct drm_connector
- *connector, bool force)
-{
- struct pl111_drm_connector *pl111_connector =
- to_pl111_connector(connector);
-
- return (pl111_connector->panel ?
- connector_status_connected :
- connector_status_disconnected);
-}
-
-static int pl111_connector_helper_get_modes(struct drm_connector *connector)
-{
- struct pl111_drm_connector *pl111_connector =
- to_pl111_connector(connector);
-
- if (!pl111_connector->panel)
- return 0;
-
- return drm_panel_get_modes(pl111_connector->panel);
-}
-
-const struct drm_connector_funcs connector_funcs = {
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = pl111_connector_destroy,
- .detect = pl111_connector_detect,
- .dpms = drm_atomic_helper_connector_dpms,
- .reset = drm_atomic_helper_connector_reset,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-const struct drm_connector_helper_funcs connector_helper_funcs = {
- .get_modes = pl111_connector_helper_get_modes,
-};
-
-/* Walks the OF graph to find the panel node and then asks DRM to look
- * up the panel.
- */
-static struct drm_panel *pl111_get_panel(struct device *dev)
-{
- struct device_node *endpoint, *panel_node;
- struct device_node *np = dev->of_node;
- struct drm_panel *panel;
-
- endpoint = of_graph_get_next_endpoint(np, NULL);
- if (!endpoint) {
- dev_err(dev, "no endpoint to fetch panel\n");
- return NULL;
- }
-
- /* don't proceed if we have an endpoint but no panel_node tied to it */
- panel_node = of_graph_get_remote_port_parent(endpoint);
- of_node_put(endpoint);
- if (!panel_node) {
- dev_err(dev, "no valid panel node\n");
- return NULL;
- }
-
- panel = of_drm_find_panel(panel_node);
- of_node_put(panel_node);
-
- return panel;
-}
-
-int pl111_connector_init(struct drm_device *dev)
-{
- struct pl111_drm_dev_private *priv = dev->dev_private;
- struct pl111_drm_connector *pl111_connector = &priv->connector;
- struct drm_connector *connector = &pl111_connector->connector;
-
- drm_connector_init(dev, connector, &connector_funcs,
- DRM_MODE_CONNECTOR_DPI);
- drm_connector_helper_add(connector, &connector_helper_funcs);
-
- pl111_connector->panel = pl111_get_panel(dev->dev);
- if (pl111_connector->panel)
- drm_panel_attach(pl111_connector->panel, connector);
-
- return 0;
-}
-
@@ -21,7 +21,6 @@
#include <linux/of_graph.h>
#include <drm/drmP.h>
-#include <drm/drm_panel.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
@@ -93,7 +92,7 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe,
struct pl111_drm_dev_private *priv = drm->dev_private;
const struct drm_display_mode *mode = &cstate->mode;
struct drm_framebuffer *fb = plane->state->fb;
- struct drm_connector *connector = &priv->connector.connector;
+ struct drm_connector *connector = priv->connector;
u32 cntl;
u32 ppl, hsw, hfp, hbp;
u32 lpp, vsw, vfp, vbp;
@@ -155,8 +154,6 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe,
writel(0, priv->regs + CLCD_TIM3);
- drm_panel_prepare(priv->connector.panel);
-
/* Enable and Power Up */
cntl = CNTL_LCDEN | CNTL_LCDTFT | CNTL_LCDPWR | CNTL_LCDVCOMP(1);
@@ -203,8 +200,6 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe,
writel(cntl, priv->regs + CLCD_PL111_CNTL);
- drm_panel_enable(priv->connector.panel);
-
drm_crtc_vblank_on(crtc);
}
@@ -216,13 +211,9 @@ void pl111_display_disable(struct drm_simple_display_pipe *pipe)
drm_crtc_vblank_off(crtc);
- drm_panel_disable(priv->connector.panel);
-
/* Disable and Power Down */
writel(0, priv->regs + CLCD_PL111_CNTL);
- drm_panel_unprepare(priv->connector.panel);
-
clk_disable_unprepare(priv->clk);
}
@@ -457,9 +448,12 @@ int pl111_display_init(struct drm_device *drm)
ret = drm_simple_display_pipe_init(drm, &priv->pipe,
&pl111_display_funcs,
formats, ARRAY_SIZE(formats),
- &priv->connector.connector);
+ priv->connector);
if (ret)
return ret;
+ /* We need the encoder to attach the bridge */
+ priv->encoder = &priv->pipe.encoder;
+
return 0;
}
@@ -21,21 +21,23 @@
#include <drm/drm_gem.h>
#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_bridge.h>
#include <linux/clk-provider.h>
#define CLCD_IRQ_NEXTBASE_UPDATE BIT(2)
struct drm_minor;
-struct pl111_drm_connector {
- struct drm_connector connector;
- struct drm_panel *panel;
-};
-
struct pl111_drm_dev_private {
struct drm_device *drm;
- struct pl111_drm_connector connector;
+ struct drm_connector *connector;
+ struct drm_encoder *encoder;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
struct drm_simple_display_pipe pipe;
struct drm_fbdev_cma *fbdev;
@@ -50,14 +52,10 @@ struct pl111_drm_dev_private {
spinlock_t tim2_lock;
};
-#define to_pl111_connector(x) \
- container_of(x, struct pl111_drm_connector, connector)
-
int pl111_display_init(struct drm_device *dev);
int pl111_enable_vblank(struct drm_device *drm, unsigned int crtc);
void pl111_disable_vblank(struct drm_device *drm, unsigned int crtc);
irqreturn_t pl111_irq(int irq, void *data);
-int pl111_connector_init(struct drm_device *dev);
int pl111_debugfs_init(struct drm_minor *minor);
#endif /* _PL111_DRM_H_ */
@@ -67,6 +67,9 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_panel.h>
#include "pl111_drm.h"
@@ -82,6 +85,8 @@ static int pl111_modeset_init(struct drm_device *dev)
{
struct drm_mode_config *mode_config;
struct pl111_drm_dev_private *priv = dev->dev_private;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
int ret = 0;
drm_mode_config_init(dev);
@@ -92,34 +97,46 @@ static int pl111_modeset_init(struct drm_device *dev)
mode_config->min_height = 1;
mode_config->max_height = 768;
- ret = pl111_connector_init(dev);
- if (ret) {
- dev_err(dev->dev, "Failed to create pl111_drm_connector\n");
- goto out_config;
- }
-
- /* Don't actually attach if we didn't find a drm_panel
- * attached to us. This will allow a kernel to include both
- * the fbdev pl111 driver and this one, and choose between
- * them based on which subsystem has support for the panel.
- */
- if (!priv->connector.panel) {
- dev_info(dev->dev,
- "Disabling due to lack of DRM panel device.\n");
- ret = -ENODEV;
- goto out_config;
+ ret = drm_of_find_panel_or_bridge(dev->dev->of_node,
+ 0, 0, &panel, &bridge);
+ if (ret && ret != -ENODEV)
+ return ret;
+ if (panel) {
+ bridge = drm_panel_bridge_add(panel,
+ DRM_MODE_CONNECTOR_Unknown);
+ if (IS_ERR(bridge)) {
+ ret = PTR_ERR(bridge);
+ goto out_config;
+ }
}
ret = pl111_display_init(dev);
if (ret != 0) {
dev_err(dev->dev, "Failed to init display\n");
- goto out_config;
+ goto out_bridge;
+ }
+
+ if (bridge) {
+ ret = drm_bridge_attach(priv->encoder, bridge, NULL);
+ if (ret)
+ goto out_bridge;
+ }
+
+ /*
+ * TODO: when we are using a different bridge than a panel
+ * (such as a dumb VGA connector) we need to devise a different
+ * method to get the connector out of the bridge.
+ */
+ if (panel) {
+ priv->panel = panel;
+ priv->connector = panel->connector;
}
+ priv->bridge = bridge;
ret = drm_vblank_init(dev, 1);
if (ret != 0) {
dev_err(dev->dev, "Failed to init vblank\n");
- goto out_config;
+ goto out_bridge;
}
drm_mode_config_reset(dev);
@@ -131,6 +148,11 @@ static int pl111_modeset_init(struct drm_device *dev)
goto finish;
+out_bridge:
+ if (panel)
+ drm_panel_bridge_remove(bridge);
+ else
+ drm_bridge_remove(bridge);
out_config:
drm_mode_config_cleanup(dev);
finish:
@@ -237,6 +259,10 @@ static int pl111_amba_remove(struct amba_device *amba_dev)
drm_dev_unregister(drm);
if (priv->fbdev)
drm_fbdev_cma_fini(priv->fbdev);
+ if (priv->panel)
+ drm_panel_bridge_remove(priv->bridge);
+ else
+ drm_bridge_remove(priv->bridge);
drm_mode_config_cleanup(drm);
drm_dev_unref(drm);
This replaces the custom connector in the PL111 with the panel bridge helper. This works nicely for all standard panels, but since there are several PL11x-based systems that will need to use the dumb VGA connector bridge we use drm_of_find_panel_or_bridge() and make some headroom for dealing with bridges that are not panels as well, and drop a TODO in the code. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- ChangeLog v1->v2: - Remove the panel [un]prepare() and [en|dis]able() calls from the display driver, since this is now handled by the bridge. --- drivers/gpu/drm/pl111/Kconfig | 3 +- drivers/gpu/drm/pl111/Makefile | 3 +- drivers/gpu/drm/pl111/pl111_connector.c | 127 -------------------------------- drivers/gpu/drm/pl111/pl111_display.c | 16 ++-- drivers/gpu/drm/pl111/pl111_drm.h | 18 ++--- drivers/gpu/drm/pl111/pl111_drv.c | 62 +++++++++++----- 6 files changed, 60 insertions(+), 169 deletions(-) delete mode 100644 drivers/gpu/drm/pl111/pl111_connector.c