Claude review: Apply drm_bridge_connector and panel_bridge helper for the Analogix DP driver

Claude review: Apply drm_bridge_connector and panel_bridge helper for the Analogix DP driver

[Claude Code Review Bot]

Overall Series Review

Subject: Apply drm_bridge_connector and panel_bridge helper
 for the Analogix DP driver
Author: Damon Ding <damon.ding@rock-chips.com>
Patches: 16
Reviewed: 2026-02-11T16:37:15.533850

---

This is a comprehensive 15-patch series that refactors the Analogix DP driver to adopt modern DRM bridge infrastructure. The series demonstrates good progression and organization:

**Positive aspects:**
- Well-structured incremental refactoring that preserves bisectability
- Strong review and testing coverage (reviewed by multiple maintainers, tested on multiple platforms)
- Clear commit messages explaining the rationale for changes
- Removes code duplication and technical debt
- Modernizes the driver to use standard DRM helpers

**Concerns identified:**
1. **Typo in commit message** (PATCH 1): "attachmenet" should be "attachment"
2. **Potential bug** (PATCH 15, line 3342): Wrong variable returned on error - returns `bridge` instead of `dp->plat_data->next_bridge`
3. **Missing validation** (PATCH 7): Direct modification of display_info without proper locking
4. **API evolution complexity**: Multiple callbacks removed/changed across patches could cause integration issues

**Architecture changes:**
- Centralizes panel/bridge parsing in Analogix core (good)
- Applies drm_bridge_connector helper framework (modern approach)
- Uses panel_bridge wrapper pattern (standard)
- Removes platform-specific hacks in favor of generic code (excellent)

**Testing coverage:** Excellent - tested on Exynos (Samsung) and RK3588 (Rockchip) platforms.

---

---
Generated by Claude Code Patch Reviewer

[PATCH v10 00/18] Apply drm_bridge_connector and panel_bridge helper for the Analogix DP driver

[Damon Ding]

Picked from:
https://lore.kernel.org/all/20251217093321.3108939-1-damon.ding@rock-chips.com/

PATCH 1 is to add a new parameter to store the point of next bridge.
PATCH 2 is to make legacy bridge driver more universal.
PATCH 3-10 are preparations for apply drm_bridge_connector helper.
PATCH 11-12 is to apply the drm_bridge_connector helper.
PATCH 13-15 are to move the panel/bridge parsing to the Analogix side.
PATCH 16 is to attach the next bridge on Analogix side uniformly.
PATCH 17-18 are to apply the panel_bridge helper.

The following reviewed commits, which to make codes more concise, are
rebased to the front of this patch series:

https://lore.kernel.org/all/20251110085823.1197472-1-damon.ding@rock-chips.com/
https://lore.kernel.org/all/20251111022103.1350183-1-damon.ding@rock-chips.com/

Damon Ding (18):
  drm/bridge: analogix_dp: Add &analogix_dp_plat_data.next_bridge
  drm/bridge: Move legacy bridge driver out of imx directory for
    multi-platform use
  drm/exynos: exynos_dp: Remove &exynos_dp_device.ptn_bridge
  drm/exynos: exynos_dp: Remove unused &exynos_dp_device.connector
  drm/exynos: exynos_dp: Apply of-display-mode-bridge to parse the
    display-timings node
  drm/bridge: analogix_dp: Remove redundant
    &analogix_dp_plat_data.skip_connector
  drm/bridge: analogix_dp: Move the color format check to
    .atomic_check() for Rockchip platforms
  drm/bridge: analogix_dp: Remove unused
    &analogix_dp_plat_data.get_modes()
  drm/bridge: analogix_dp: Remove unused struct drm_connector* for
    &analogix_dp_plat_data.attach()
  drm/bridge: analogix_dp: Pass struct drm_atomic_state* for
    analogix_dp_bridge_mode_set()
  drm/bridge: analogix_dp: Apply drm_bridge_connector helper
  drm/bridge: analogix_dp: Remove unnecessary
    &analogix_dp_device.connector
  drm/bridge: analogix_dp: Add new API analogix_dp_finish_probe()
  drm/rockchip: analogix_dp: Apply analogix_dp_finish_probe()
  drm/exynos: exynos_dp: Apply analogix_dp_finish_probe()
  drm/bridge: analogix_dp: Attach the next bridge in
    analogix_dp_bridge_attach()
  drm/bridge: analogix_dp: Remove bridge disabing and panel unpreparing
    in analogix_dp_unbind()
  drm/bridge: analogix_dp: Apply panel_bridge helper

 drivers/gpu/drm/bridge/Kconfig                |  10 +
 drivers/gpu/drm/bridge/Makefile               |   1 +
 drivers/gpu/drm/bridge/analogix/Kconfig       |   1 +
 .../drm/bridge/analogix/analogix_dp_core.c    | 236 +++++++++---------
 .../drm/bridge/analogix/analogix_dp_core.h    |   1 -
 drivers/gpu/drm/bridge/imx/Kconfig            |  10 -
 drivers/gpu/drm/bridge/imx/Makefile           |   1 -
 .../gpu/drm/bridge/imx/imx-legacy-bridge.c    |  91 -------
 .../gpu/drm/bridge/of-display-mode-bridge.c   |  93 +++++++
 drivers/gpu/drm/exynos/Kconfig                |   1 +
 drivers/gpu/drm/exynos/exynos_dp.c            | 110 ++------
 drivers/gpu/drm/imx/ipuv3/Kconfig             |   4 +-
 drivers/gpu/drm/imx/ipuv3/imx-ldb.c           |   6 +-
 drivers/gpu/drm/imx/ipuv3/parallel-display.c  |   5 +-
 .../gpu/drm/rockchip/analogix_dp-rockchip.c   |  67 +----
 include/drm/bridge/analogix_dp.h              |   8 +-
 include/drm/bridge/imx.h                      |  17 --
 include/drm/bridge/of-display-mode-bridge.h   |  17 ++
 18 files changed, 293 insertions(+), 386 deletions(-)
 delete mode 100644 drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c
 create mode 100644 drivers/gpu/drm/bridge/of-display-mode-bridge.c
 delete mode 100644 include/drm/bridge/imx.h
 create mode 100644 include/drm/bridge/of-display-mode-bridge.h

---

Changes in v2:
- Update Exynos DP driver synchronously.
- Move the panel/bridge parsing to the Analogix side.

Changes in v3:
- Rebase for the existing devm_drm_bridge_alloc() applying commit.
- Fix the typographical error of panel/bridge check in exynos_dp_bind().
- Squash all commits related to skip_connector deletion in both Exynos and
  Analogix code into one.
- Apply panel_bridge helper to make the codes more concise.
- Fix the handing of bridge in analogix_dp_bridge_get_modes().
- Remove unnecessary parameter struct drm_connector* for callback
  &analogix_dp_plat_data.attach().
- In order to decouple the connector driver and the bridge driver, move
  the bridge connector initilization to the Rockchip and Exynos sides.

Changes in v4:
- Rebase for the applied &drm_bridge_funcs.detect() modification commit.
- Rename analogix_dp_find_panel_or_bridge() to analogix_dp_finish_probe().
- Drop the drmm_encoder_init() modification commit.
- Rename the &analogix_dp_plat_data.bridge to
  &analogix_dp_plat_data.next_bridge.

Changes in v5:
- Add legacy bridge to parse the display-timings node under the dp node
  for Exynos side.
- Move color format check to &drm_connector_helper_funcs.atomic_check()
  in order to get rid of &analogix_dp_plat_data.get_modes().
- Remove unused callback &analogix_dp_plat_data.get_modes().
- Distinguish the &drm_bridge->ops of Analogix bridge based on whether
  the downstream device is a panel, a bridge or neither.
- Select DRM_DISPLAY_DP_AUX_BUS for DRM_ANALOGIX_DP, and remove it for
  ROCKCHIP_ANALOGIX_DP.
- Apply rockchip_dp_attach() to support the next bridge attachment for
  the Rockchip side.
- Move next_bridge attachment from Analogix side to Rockchip/Exynos sides.

Changes in v6:
- Move legacy bridge driver out of imx directory for multi-platform use.
- Apply DRM legacy bridge to parse display timings intead of implementing
  the same codes only for Exynos DP.
- Ensure last bridge determines EDID/modes detection capabilities in DRM
  bridge_connector driver.
- Remove unnecessary drm_bridge_get_modes() in
  analogix_dp_bridge_get_modes().
- Simplify analogix_dp_bridge_edid_read().
- If the next is a bridge, set DRM_BRIDGE_OP_DETECT and return
  connector_status_connected in analogix_dp_bridge_detect().
- Set flag DRM_BRIDGE_ATTACH_NO_CONNECTOR for bridge attachment while
  binding. Meanwhile, make DRM_BRIDGE_ATTACH_NO_CONNECTOR unsuppported
  in analogix_dp_bridge_attach().
- Move the next bridge attachment to the Analogix side rather than
  scattered on Rockchip and Exynos sides.
- Remove the unnecessary analogix_dp_bridge_get_modes().
- Squash [PATCH v5 15/17] into [PATCH v5 17/17].
- Fix the &drm_bridge->ops to DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_DETECT.

Changes in v7:
- As Luca suggested, simplify the code and related comment for bridge_connector
  modifications. Additionally, move the commit related to bridge_connector to
  the top of this patch series.
- Rename legacy-bridge driver to of-display-mode-bridge driver.
- Remove unnecessary API drm_bridge_is_legacy() and apply a temporary flag
  &exynos_dp_device.has_of_bridge instead, which will be removed finally.
- Remove exynos_dp_legacy_bridge_init() and inline API
  devm_drm_of_display_mode_bridge().

Changes in v8:
- Adapt the related modifications to the newest bridge_connector driver.

Changes in v9:
- Fix the Kconfig help text for CONFIG_DRM_OF_DISPLAY_MODE_BRIDGE.
- Add Tested-by tag from Heiko.

Changes in v10:
- Fix to use dev_err_probe() in newly added API analogix_dp_finish_probe().
- Expaned commit message for [PATCH v9 9/15] and [PATCH v9 10/15].
- Split [PATCH v9 9/15] into serval smaller commits.
- Add Reviewed-by tags from Luca.

-- 
2.34.1

[PATCH v10 01/18] drm/bridge: analogix_dp: Add &analogix_dp_plat_data.next_bridge

[Damon Ding]

In order to move the panel/bridge parsing and attachmenet to the
Analogix side, add component struct drm_bridge *next_bridge to
platform data struct analogix_dp_plat_data.

The movement makes sense because the panel/bridge should logically
be positioned behind the Analogix bridge in the display pipeline.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

---

Changes in v4:
- Rename the &analogix_dp_plat_data.bridge to
  &analogix_dp_plat_data.next_bridge

Changes in v9:
- Add Reviewed-by and Tested-by tags.
---
 include/drm/bridge/analogix_dp.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
index cf17646c1310..582357c20640 100644
--- a/include/drm/bridge/analogix_dp.h
+++ b/include/drm/bridge/analogix_dp.h
@@ -27,6 +27,7 @@ static inline bool is_rockchip(enum analogix_dp_devtype type)
 struct analogix_dp_plat_data {
 	enum analogix_dp_devtype dev_type;
 	struct drm_panel *panel;
+	struct drm_bridge *next_bridge;
 	struct drm_encoder *encoder;
 	struct drm_connector *connector;
 	bool skip_connector;
-- 
2.34.1

[PATCH v10 02/18] drm/bridge: Move legacy bridge driver out of imx directory for multi-platform use

[Damon Ding]

As suggested by Dmitry, the DRM legacy bridge driver can be pulled
out of imx/ subdir for multi-platform use. The driver is also renamed
to make it more generic and suitable for platforms other than i.MX.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

---

Changes in v7:
- Rename legacy-bridge to of-display-mode-bridge.
- Remove unnecessary API drm_bridge_is_legacy().

Changes in v9:
- Fix the Kconfig help text.
- Add Tested-by tag.

Changes in v10:
- Add Reviewed-by tag.
---
 drivers/gpu/drm/bridge/Kconfig                | 10 ++
 drivers/gpu/drm/bridge/Makefile               |  1 +
 drivers/gpu/drm/bridge/imx/Kconfig            | 10 --
 drivers/gpu/drm/bridge/imx/Makefile           |  1 -
 .../gpu/drm/bridge/imx/imx-legacy-bridge.c    | 91 ------------------
 .../gpu/drm/bridge/of-display-mode-bridge.c   | 93 +++++++++++++++++++
 drivers/gpu/drm/imx/ipuv3/Kconfig             |  4 +-
 drivers/gpu/drm/imx/ipuv3/imx-ldb.c           |  6 +-
 drivers/gpu/drm/imx/ipuv3/parallel-display.c  |  5 +-
 include/drm/bridge/imx.h                      | 17 ----
 include/drm/bridge/of-display-mode-bridge.h   | 17 ++++
 11 files changed, 129 insertions(+), 126 deletions(-)
 delete mode 100644 drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c
 create mode 100644 drivers/gpu/drm/bridge/of-display-mode-bridge.c
 delete mode 100644 include/drm/bridge/imx.h
 create mode 100644 include/drm/bridge/of-display-mode-bridge.h

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 39385deafc68..6563d367cad8 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -251,6 +251,16 @@ config DRM_NXP_PTN3460
 	help
 	  NXP PTN3460 eDP-LVDS bridge chip driver.
 
+config DRM_OF_DISPLAY_MODE_BRIDGE
+	tristate
+	depends on DRM_BRIDGE && OF
+	help
+	  This is a DRM bridge implementation that uses of_get_drm_display_mode
+	  to acquire display mode.
+
+	  It exists for compatibility with legacy display mode parsing, in order
+	  to conform to the panel-bridge framework.
+
 config DRM_PARADE_PS8622
 	tristate "Parade eDP/LVDS bridge"
 	depends on OF
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index 909c21cc3acd..c54018a014d3 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o
 obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o
 obj-$(CONFIG_DRM_MICROCHIP_LVDS_SERIALIZER) += microchip-lvds.o
 obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
+obj-$(CONFIG_DRM_OF_DISPLAY_MODE_BRIDGE) += of-display-mode-bridge.o
 obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
 obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o
 obj-$(CONFIG_DRM_SAMSUNG_DSIM) += samsung-dsim.o
diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig
index b9028a5e5a06..8877b9789868 100644
--- a/drivers/gpu/drm/bridge/imx/Kconfig
+++ b/drivers/gpu/drm/bridge/imx/Kconfig
@@ -3,16 +3,6 @@ if ARCH_MXC || COMPILE_TEST
 config DRM_IMX_LDB_HELPER
 	tristate
 
-config DRM_IMX_LEGACY_BRIDGE
-	tristate
-	depends on DRM_IMX
-	help
-	  This is a DRM bridge implementation for the DRM i.MX IPUv3 driver,
-	  that uses of_get_drm_display_mode to acquire display mode.
-
-	  Newer designs should not use this bridge and should use proper panel
-	  driver instead.
-
 config DRM_IMX8MP_DW_HDMI_BRIDGE
 	tristate "Freescale i.MX8MP HDMI-TX bridge support"
 	depends on OF
diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile
index 8d01fda25451..69d9f9abbe36 100644
--- a/drivers/gpu/drm/bridge/imx/Makefile
+++ b/drivers/gpu/drm/bridge/imx/Makefile
@@ -1,5 +1,4 @@
 obj-$(CONFIG_DRM_IMX_LDB_HELPER) += imx-ldb-helper.o
-obj-$(CONFIG_DRM_IMX_LEGACY_BRIDGE) += imx-legacy-bridge.o
 obj-$(CONFIG_DRM_IMX8MP_DW_HDMI_BRIDGE) += imx8mp-hdmi-tx.o
 obj-$(CONFIG_DRM_IMX8MP_HDMI_PAI) += imx8mp-hdmi-pai.o
 obj-$(CONFIG_DRM_IMX8MP_HDMI_PVI) += imx8mp-hdmi-pvi.o
diff --git a/drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c b/drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c
deleted file mode 100644
index 0e31d5000e7c..000000000000
--- a/drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c
+++ /dev/null
@@ -1,91 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Freescale i.MX drm driver
- *
- * bridge driver for legacy DT bindings, utilizing display-timings node
- */
-
-#include <linux/export.h>
-
-#include <drm/drm_bridge.h>
-#include <drm/drm_modes.h>
-#include <drm/drm_probe_helper.h>
-#include <drm/bridge/imx.h>
-
-#include <video/of_display_timing.h>
-#include <video/of_videomode.h>
-
-struct imx_legacy_bridge {
-	struct drm_bridge base;
-
-	struct drm_display_mode mode;
-	u32 bus_flags;
-};
-
-#define to_imx_legacy_bridge(bridge)	container_of(bridge, struct imx_legacy_bridge, base)
-
-static int imx_legacy_bridge_attach(struct drm_bridge *bridge,
-				    struct drm_encoder *encoder,
-				    enum drm_bridge_attach_flags flags)
-{
-	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
-		return -EINVAL;
-
-	return 0;
-}
-
-static int imx_legacy_bridge_get_modes(struct drm_bridge *bridge,
-				       struct drm_connector *connector)
-{
-	struct imx_legacy_bridge *imx_bridge = to_imx_legacy_bridge(bridge);
-	int ret;
-
-	ret = drm_connector_helper_get_modes_fixed(connector, &imx_bridge->mode);
-	if (ret)
-		return ret;
-
-	connector->display_info.bus_flags = imx_bridge->bus_flags;
-
-	return 0;
-}
-
-struct drm_bridge_funcs imx_legacy_bridge_funcs = {
-	.attach = imx_legacy_bridge_attach,
-	.get_modes = imx_legacy_bridge_get_modes,
-};
-
-struct drm_bridge *devm_imx_drm_legacy_bridge(struct device *dev,
-					      struct device_node *np,
-					      int type)
-{
-	struct imx_legacy_bridge *imx_bridge;
-	int ret;
-
-	imx_bridge = devm_drm_bridge_alloc(dev, struct imx_legacy_bridge,
-					   base, &imx_legacy_bridge_funcs);
-	if (IS_ERR(imx_bridge))
-		return ERR_CAST(imx_bridge);
-
-	ret = of_get_drm_display_mode(np,
-				      &imx_bridge->mode,
-				      &imx_bridge->bus_flags,
-				      OF_USE_NATIVE_MODE);
-	if (ret)
-		return ERR_PTR(ret);
-
-	imx_bridge->mode.type |= DRM_MODE_TYPE_DRIVER;
-
-	imx_bridge->base.of_node = np;
-	imx_bridge->base.ops = DRM_BRIDGE_OP_MODES;
-	imx_bridge->base.type = type;
-
-	ret = devm_drm_bridge_add(dev, &imx_bridge->base);
-	if (ret)
-		return ERR_PTR(ret);
-
-	return &imx_bridge->base;
-}
-EXPORT_SYMBOL_GPL(devm_imx_drm_legacy_bridge);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Freescale i.MX DRM bridge driver for legacy DT bindings");
diff --git a/drivers/gpu/drm/bridge/of-display-mode-bridge.c b/drivers/gpu/drm/bridge/of-display-mode-bridge.c
new file mode 100644
index 000000000000..cb15713f3a79
--- /dev/null
+++ b/drivers/gpu/drm/bridge/of-display-mode-bridge.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2012 Sascha Hauer, Pengutronix
+ *
+ * bridge driver for legacy DT bindings, utilizing display-timings node
+ *
+ * Author: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
+ */
+
+#include <linux/export.h>
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/bridge/of-display-mode-bridge.h>
+
+#include <video/of_display_timing.h>
+#include <video/of_videomode.h>
+
+struct of_display_mode_bridge {
+	struct drm_bridge base;
+
+	struct drm_display_mode mode;
+	u32 bus_flags;
+};
+
+#define to_of_display_mode_bridge(bridge) container_of(bridge, struct of_display_mode_bridge, base)
+
+static int of_display_mode_bridge_attach(struct drm_bridge *bridge,
+					 struct drm_encoder *encoder,
+					 enum drm_bridge_attach_flags flags)
+{
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int of_display_mode_bridge_get_modes(struct drm_bridge *bridge,
+					    struct drm_connector *connector)
+{
+	struct of_display_mode_bridge *of_bridge = to_of_display_mode_bridge(bridge);
+	int ret;
+
+	ret = drm_connector_helper_get_modes_fixed(connector, &of_bridge->mode);
+	if (ret)
+		return ret;
+
+	connector->display_info.bus_flags = of_bridge->bus_flags;
+
+	return 0;
+}
+
+struct drm_bridge_funcs of_display_mode_bridge_funcs = {
+	.attach = of_display_mode_bridge_attach,
+	.get_modes = of_display_mode_bridge_get_modes,
+};
+
+struct drm_bridge *devm_drm_of_display_mode_bridge(struct device *dev,
+						   struct device_node *np,
+						   int type)
+{
+	struct of_display_mode_bridge *of_bridge;
+	int ret;
+
+	of_bridge = devm_drm_bridge_alloc(dev, struct of_display_mode_bridge,
+					  base, &of_display_mode_bridge_funcs);
+	if (IS_ERR(of_bridge))
+		return ERR_CAST(of_bridge);
+
+	ret = of_get_drm_display_mode(np,
+				      &of_bridge->mode,
+				      &of_bridge->bus_flags,
+				      OF_USE_NATIVE_MODE);
+	if (ret)
+		return ERR_PTR(ret);
+
+	of_bridge->mode.type |= DRM_MODE_TYPE_DRIVER;
+
+	of_bridge->base.of_node = np;
+	of_bridge->base.ops = DRM_BRIDGE_OP_MODES;
+	of_bridge->base.type = type;
+
+	ret = devm_drm_bridge_add(dev, &of_bridge->base);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return &of_bridge->base;
+}
+EXPORT_SYMBOL_GPL(devm_drm_of_display_mode_bridge);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("DRM bridge driver for legacy DT bindings");
diff --git a/drivers/gpu/drm/imx/ipuv3/Kconfig b/drivers/gpu/drm/imx/ipuv3/Kconfig
index acaf25089001..e98f8d35efaa 100644
--- a/drivers/gpu/drm/imx/ipuv3/Kconfig
+++ b/drivers/gpu/drm/imx/ipuv3/Kconfig
@@ -15,7 +15,7 @@ config DRM_IMX_PARALLEL_DISPLAY
 	depends on DRM_IMX
 	select DRM_BRIDGE
 	select DRM_BRIDGE_CONNECTOR
-	select DRM_IMX_LEGACY_BRIDGE
+	select DRM_OF_DISPLAY_MODE_BRIDGE
 	select DRM_PANEL_BRIDGE
 	select VIDEOMODE_HELPERS
 
@@ -36,7 +36,7 @@ config DRM_IMX_LDB
 	select DRM_BRIDGE
 	select DRM_BRIDGE_CONNECTOR
 	select DRM_PANEL_BRIDGE
-	select DRM_IMX_LEGACY_BRIDGE
+	select DRM_OF_DISPLAY_MODE_BRIDGE
 	help
 	  Choose this to enable the internal LVDS Display Bridge (LDB)
 	  found on i.MX53 and i.MX6 processors.
diff --git a/drivers/gpu/drm/imx/ipuv3/imx-ldb.c b/drivers/gpu/drm/imx/ipuv3/imx-ldb.c
index 626d410d9150..730caf883e83 100644
--- a/drivers/gpu/drm/imx/ipuv3/imx-ldb.c
+++ b/drivers/gpu/drm/imx/ipuv3/imx-ldb.c
@@ -28,7 +28,7 @@
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
-#include <drm/bridge/imx.h>
+#include <drm/bridge/of-display-mode-bridge.h>
 
 #include "imx-drm.h"
 
@@ -605,8 +605,8 @@ static int imx_ldb_probe(struct platform_device *pdev)
 		 * checking the bus_format property.
 		 */
 		if (!channel->bridge) {
-			channel->bridge = devm_imx_drm_legacy_bridge(dev, child,
-								     DRM_MODE_CONNECTOR_LVDS);
+			channel->bridge = devm_drm_of_display_mode_bridge(dev, child,
+									  DRM_MODE_CONNECTOR_LVDS);
 			if (IS_ERR(channel->bridge)) {
 				ret = PTR_ERR(channel->bridge);
 				goto free_child;
diff --git a/drivers/gpu/drm/imx/ipuv3/parallel-display.c b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
index 6fbf505d2801..1109cb1badcb 100644
--- a/drivers/gpu/drm/imx/ipuv3/parallel-display.c
+++ b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
@@ -19,7 +19,7 @@
 #include <drm/drm_of.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
-#include <drm/bridge/imx.h>
+#include <drm/bridge/of-display-mode-bridge.h>
 
 #include "imx-drm.h"
 
@@ -233,7 +233,8 @@ static int imx_pd_probe(struct platform_device *pdev)
 	/* port@1 is the output port */
 	imxpd->next_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);
 	if (imxpd->next_bridge == ERR_PTR(-ENODEV))
-		imxpd->next_bridge = devm_imx_drm_legacy_bridge(dev, np, DRM_MODE_CONNECTOR_DPI);
+		imxpd->next_bridge = devm_drm_of_display_mode_bridge(dev, np,
+								     DRM_MODE_CONNECTOR_DPI);
 	if (IS_ERR(imxpd->next_bridge)) {
 		ret = PTR_ERR(imxpd->next_bridge);
 		return ret;
diff --git a/include/drm/bridge/imx.h b/include/drm/bridge/imx.h
deleted file mode 100644
index b93f719fe0e7..000000000000
--- a/include/drm/bridge/imx.h
+++ /dev/null
@@ -1,17 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2012 Sascha Hauer, Pengutronix
- */
-
-#ifndef DRM_IMX_BRIDGE_H
-#define DRM_IMX_BRIDGE_H
-
-struct device;
-struct device_node;
-struct drm_bridge;
-
-struct drm_bridge *devm_imx_drm_legacy_bridge(struct device *dev,
-					      struct device_node *np,
-					      int type);
-
-#endif
diff --git a/include/drm/bridge/of-display-mode-bridge.h b/include/drm/bridge/of-display-mode-bridge.h
new file mode 100644
index 000000000000..89fcfedf68d8
--- /dev/null
+++ b/include/drm/bridge/of-display-mode-bridge.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2012 Sascha Hauer, Pengutronix
+ */
+
+#ifndef DRM_OF_DISPLAY_MODE_BRIDGE_H
+#define DRM_OF_DISPLAY_MODE_BRIDGE_H
+
+struct device;
+struct device_node;
+struct drm_bridge;
+
+struct drm_bridge *devm_drm_of_display_mode_bridge(struct device *dev,
+						   struct device_node *np,
+						   int type);
+
+#endif
-- 
2.34.1

[PATCH v10 03/18] drm/exynos: exynos_dp: Remove &exynos_dp_device.ptn_bridge

[Damon Ding]

Use &analogix_dp_plat_data.bridge instead of &exynos_dp_device.ptn_bridge
directly.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

------

Changes in v3:
- Fix the typographical error for &dp->plat_data.bridge.

Changes in v4:
- Rename the &analogix_dp_plat_data.bridge to
  &analogix_dp_plat_data.next_bridge.

Changes in v9:
- Add Reviewed-by and Tested-by tags.
---
 drivers/gpu/drm/exynos/exynos_dp.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
index 5bcf41e0bd04..f469ac5b3c2a 100644
--- a/drivers/gpu/drm/exynos/exynos_dp.c
+++ b/drivers/gpu/drm/exynos/exynos_dp.c
@@ -36,7 +36,6 @@
 struct exynos_dp_device {
 	struct drm_encoder         encoder;
 	struct drm_connector       *connector;
-	struct drm_bridge          *ptn_bridge;
 	struct drm_device          *drm_dev;
 	struct device              *dev;
 
@@ -106,8 +105,8 @@ static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
 	dp->connector = connector;
 
 	/* Pre-empt DP connector creation if there's a bridge */
-	if (dp->ptn_bridge) {
-		ret = drm_bridge_attach(&dp->encoder, dp->ptn_bridge, bridge,
+	if (plat_data->next_bridge) {
+		ret = drm_bridge_attach(&dp->encoder, plat_data->next_bridge, bridge,
 					0);
 		if (ret)
 			return ret;
@@ -155,7 +154,7 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
 
 	dp->drm_dev = drm_dev;
 
-	if (!dp->plat_data.panel && !dp->ptn_bridge) {
+	if (!dp->plat_data.panel && !dp->plat_data.next_bridge) {
 		ret = exynos_dp_dt_parse_panel(dp);
 		if (ret)
 			return ret;
@@ -232,6 +231,7 @@ static int exynos_dp_probe(struct platform_device *pdev)
 
 	/* The remote port can be either a panel or a bridge */
 	dp->plat_data.panel = panel;
+	dp->plat_data.next_bridge = bridge;
 	dp->plat_data.dev_type = EXYNOS_DP;
 	dp->plat_data.power_on = exynos_dp_poweron;
 	dp->plat_data.power_off = exynos_dp_poweroff;
@@ -239,8 +239,6 @@ static int exynos_dp_probe(struct platform_device *pdev)
 	dp->plat_data.get_modes = exynos_dp_get_modes;
 	dp->plat_data.skip_connector = !!bridge;
 
-	dp->ptn_bridge = bridge;
-
 out:
 	dp->adp = analogix_dp_probe(dev, &dp->plat_data);
 	if (IS_ERR(dp->adp))
-- 
2.34.1

[PATCH v10 04/18] drm/exynos: exynos_dp: Remove unused &exynos_dp_device.connector

[Damon Ding]

The &exynos_dp_device.connector is assigned in exynos_dp_bridge_attach()
but never used. It should make sense to remove it.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

---

Changes in v5:
- Fix the 'drm/bridge' to 'drm/exynos' in commit message.

Changes in v9:
- Add Reviewed-by and Tested-by tags.
---
 drivers/gpu/drm/exynos/exynos_dp.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
index f469ac5b3c2a..e20513164032 100644
--- a/drivers/gpu/drm/exynos/exynos_dp.c
+++ b/drivers/gpu/drm/exynos/exynos_dp.c
@@ -35,7 +35,6 @@
 
 struct exynos_dp_device {
 	struct drm_encoder         encoder;
-	struct drm_connector       *connector;
 	struct drm_device          *drm_dev;
 	struct device              *dev;
 
@@ -102,8 +101,6 @@ static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
 	struct exynos_dp_device *dp = to_dp(plat_data);
 	int ret;
 
-	dp->connector = connector;
-
 	/* Pre-empt DP connector creation if there's a bridge */
 	if (plat_data->next_bridge) {
 		ret = drm_bridge_attach(&dp->encoder, plat_data->next_bridge, bridge,
-- 
2.34.1

[PATCH v10 05/18] drm/exynos: exynos_dp: Apply of-display-mode-bridge to parse the display-timings node

[Damon Ding]

If there is neither a panel nor a bridge, the display timing can be
parsed from the display-timings node under the dp node.

In order to get rid of &analogix_dp_plat_data.get_modes() and make
the codes more consistent, apply DRM of-display-mode-bridge to parse
display timings.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

------

Changes in v6:
- Apply DRM legacy bridge to parse display timings instead of
  implementing the same codes only for Exynos DP.

Changes in v7:
- Use temporary flag &exynos_dp_device.has_of_bridge, which will be
  removed in the following patch, instead of applying API
  drm_bridge_is_legacy().
- Remove exynos_dp_legacy_bridge_init() and inline API
  devm_drm_of_display_mode_bridge().

Changes in v9:
- Add Tested-by tag.

Changes in v10:
- Add Reviewed-by tag.
---
 drivers/gpu/drm/exynos/Kconfig     |  1 +
 drivers/gpu/drm/exynos/exynos_dp.c | 66 ++++++++----------------------
 2 files changed, 17 insertions(+), 50 deletions(-)

diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 0d13828e7d9e..380d9a8ce259 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -72,6 +72,7 @@ config DRM_EXYNOS_DP
 	select DRM_ANALOGIX_DP
 	select DRM_DISPLAY_DP_HELPER
 	default DRM_EXYNOS
+	select DRM_OF_DISPLAY_MODE_BRIDGE
 	select DRM_PANEL
 	help
 	  This enables support for DP device.
diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
index e20513164032..ac16138a22fe 100644
--- a/drivers/gpu/drm/exynos/exynos_dp.c
+++ b/drivers/gpu/drm/exynos/exynos_dp.c
@@ -19,6 +19,7 @@
 #include <video/videomode.h>
 
 #include <drm/bridge/analogix_dp.h>
+#include <drm/bridge/of-display-mode-bridge.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
@@ -38,9 +39,10 @@ struct exynos_dp_device {
 	struct drm_device          *drm_dev;
 	struct device              *dev;
 
-	struct videomode           vm;
 	struct analogix_dp_device *adp;
 	struct analogix_dp_plat_data plat_data;
+
+	bool has_of_bridge;
 };
 
 static int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
@@ -67,44 +69,20 @@ static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
 	return exynos_dp_crtc_clock_enable(plat_data, false);
 }
 
-static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
-			       struct drm_connector *connector)
-{
-	struct exynos_dp_device *dp = to_dp(plat_data);
-	struct drm_display_mode *mode;
-
-	if (dp->plat_data.panel)
-		return 0;
-
-	mode = drm_mode_create(connector->dev);
-	if (!mode) {
-		DRM_DEV_ERROR(dp->dev,
-			      "failed to create a new display mode.\n");
-		return 0;
-	}
-
-	drm_display_mode_from_videomode(&dp->vm, mode);
-	connector->display_info.width_mm = mode->width_mm;
-	connector->display_info.height_mm = mode->height_mm;
-
-	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
-	drm_mode_set_name(mode);
-	drm_mode_probed_add(connector, mode);
-
-	return 1;
-}
-
 static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
 				   struct drm_bridge *bridge,
 				   struct drm_connector *connector)
 {
 	struct exynos_dp_device *dp = to_dp(plat_data);
+	enum drm_bridge_attach_flags flags = 0;
 	int ret;
 
 	/* Pre-empt DP connector creation if there's a bridge */
 	if (plat_data->next_bridge) {
-		ret = drm_bridge_attach(&dp->encoder, plat_data->next_bridge, bridge,
-					0);
+		if (dp->has_of_bridge)
+			flags = DRM_BRIDGE_ATTACH_NO_CONNECTOR;
+
+		ret = drm_bridge_attach(&dp->encoder, plat_data->next_bridge, bridge, flags);
 		if (ret)
 			return ret;
 	}
@@ -129,19 +107,6 @@ static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
 	.disable = exynos_dp_nop,
 };
 
-static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
-{
-	int ret;
-
-	ret = of_get_videomode(dp->dev->of_node, &dp->vm, OF_USE_NATIVE_MODE);
-	if (ret) {
-		DRM_DEV_ERROR(dp->dev,
-			      "failed: of_get_videomode() : %d\n", ret);
-		return ret;
-	}
-	return 0;
-}
-
 static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
 {
 	struct exynos_dp_device *dp = dev_get_drvdata(dev);
@@ -151,12 +116,6 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
 
 	dp->drm_dev = drm_dev;
 
-	if (!dp->plat_data.panel && !dp->plat_data.next_bridge) {
-		ret = exynos_dp_dt_parse_panel(dp);
-		if (ret)
-			return ret;
-	}
-
 	drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS);
 
 	drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
@@ -223,6 +182,14 @@ static int exynos_dp_probe(struct platform_device *pdev)
 	}
 
 	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
+	if (ret == -ENODEV) {
+		dp->plat_data.next_bridge = devm_drm_of_display_mode_bridge(dp->dev,
+									dp->dev->of_node,
+									DRM_MODE_CONNECTOR_eDP);
+		ret = IS_ERR(dp->plat_data.next_bridge) ? PTR_ERR(dp->plat_data.next_bridge) : 0;
+		if (!ret)
+			dp->has_of_bridge = true;
+	}
 	if (ret)
 		return ret;
 
@@ -233,7 +200,6 @@ static int exynos_dp_probe(struct platform_device *pdev)
 	dp->plat_data.power_on = exynos_dp_poweron;
 	dp->plat_data.power_off = exynos_dp_poweroff;
 	dp->plat_data.attach = exynos_dp_bridge_attach;
-	dp->plat_data.get_modes = exynos_dp_get_modes;
 	dp->plat_data.skip_connector = !!bridge;
 
 out:
-- 
2.34.1

[PATCH v10 06/18] drm/bridge: analogix_dp: Remove redundant &analogix_dp_plat_data.skip_connector

[Damon Ding]

The &analogix_dp_plat_data.skip_connector related check can be replaced
by &analogix_dp_plat_data.bridge.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

------

Changes in v3:
- Squash the Exynos side commit and the Analogix side commit together.

Changes in v4:
- Rename the &analogix_dp_plat_data.bridge to
  &analogix_dp_plat_data.next_bridge.

Changes in v9:
- Add Tested-by tag.

Changes in v10:
- Add Reviewed-by tag.
---
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 2 +-
 drivers/gpu/drm/exynos/exynos_dp.c                 | 1 -
 include/drm/bridge/analogix_dp.h                   | 1 -
 3 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 3caa47d31649..4606ecc3f480 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -959,7 +959,7 @@ static int analogix_dp_bridge_attach(struct drm_bridge *bridge,
 		return -EINVAL;
 	}
 
-	if (!dp->plat_data->skip_connector) {
+	if (!dp->plat_data->next_bridge) {
 		connector = &dp->connector;
 		connector->polled = DRM_CONNECTOR_POLL_HPD;
 
diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
index ac16138a22fe..1eeb0b15f99a 100644
--- a/drivers/gpu/drm/exynos/exynos_dp.c
+++ b/drivers/gpu/drm/exynos/exynos_dp.c
@@ -200,7 +200,6 @@ static int exynos_dp_probe(struct platform_device *pdev)
 	dp->plat_data.power_on = exynos_dp_poweron;
 	dp->plat_data.power_off = exynos_dp_poweroff;
 	dp->plat_data.attach = exynos_dp_bridge_attach;
-	dp->plat_data.skip_connector = !!bridge;
 
 out:
 	dp->adp = analogix_dp_probe(dev, &dp->plat_data);
diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
index 582357c20640..f06da105d8f2 100644
--- a/include/drm/bridge/analogix_dp.h
+++ b/include/drm/bridge/analogix_dp.h
@@ -30,7 +30,6 @@ struct analogix_dp_plat_data {
 	struct drm_bridge *next_bridge;
 	struct drm_encoder *encoder;
 	struct drm_connector *connector;
-	bool skip_connector;
 
 	int (*power_on)(struct analogix_dp_plat_data *);
 	int (*power_off)(struct analogix_dp_plat_data *);
-- 
2.34.1

[PATCH v10 07/18] drm/bridge: analogix_dp: Move the color format check to .atomic_check() for Rockchip platforms

[Damon Ding]

For Rockchip platforms, the YUV color formats are currently unsupported.
This compatibility check was previously implemented in
&analogix_dp_plat_data.get_modes().

Moving color format check to &drm_connector_helper_funcs.atomic_check()
would get rid of &analogix_dp_plat_data.get_modes() and be more
reasonable than before.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

---

Changes in v9:
- Add Tested-by tag.
---
 .../gpu/drm/bridge/analogix/analogix_dp_core.c | 11 +++++++++++
 .../gpu/drm/rockchip/analogix_dp-rockchip.c    | 18 ------------------
 2 files changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 4606ecc3f480..5bf41b364aba 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -894,8 +894,19 @@ static int analogix_dp_atomic_check(struct drm_connector *connector,
 				    struct drm_atomic_state *state)
 {
 	struct analogix_dp_device *dp = to_dp(connector);
+	struct drm_display_info *di = &connector->display_info;
 	struct drm_connector_state *conn_state;
 	struct drm_crtc_state *crtc_state;
+	u32 mask = DRM_COLOR_FORMAT_YCBCR444 | DRM_COLOR_FORMAT_YCBCR422;
+
+	if (is_rockchip(dp->plat_data->dev_type)) {
+		if ((di->color_formats & mask)) {
+			DRM_DEBUG_KMS("Swapping display color format from YUV to RGB\n");
+			di->color_formats &= ~mask;
+			di->color_formats |= DRM_COLOR_FORMAT_RGB444;
+			di->bpc = 8;
+		}
+	}
 
 	conn_state = drm_atomic_get_new_connector_state(state, connector);
 	if (WARN_ON(!conn_state))
diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index fdab71d51e2a..70fe5ae69e2e 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -166,23 +166,6 @@ static int rockchip_dp_powerdown(struct analogix_dp_plat_data *plat_data)
 	return 0;
 }
 
-static int rockchip_dp_get_modes(struct analogix_dp_plat_data *plat_data,
-				 struct drm_connector *connector)
-{
-	struct drm_display_info *di = &connector->display_info;
-	/* VOP couldn't output YUV video format for eDP rightly */
-	u32 mask = DRM_COLOR_FORMAT_YCBCR444 | DRM_COLOR_FORMAT_YCBCR422;
-
-	if ((di->color_formats & mask)) {
-		DRM_DEBUG_KMS("Swapping display color format from YUV to RGB\n");
-		di->color_formats &= ~mask;
-		di->color_formats |= DRM_COLOR_FORMAT_RGB444;
-		di->bpc = 8;
-	}
-
-	return 0;
-}
-
 static bool
 rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
 				   const struct drm_display_mode *mode,
@@ -481,7 +464,6 @@ static int rockchip_dp_probe(struct platform_device *pdev)
 	dp->plat_data.dev_type = dp->data->chip_type;
 	dp->plat_data.power_on = rockchip_dp_poweron;
 	dp->plat_data.power_off = rockchip_dp_powerdown;
-	dp->plat_data.get_modes = rockchip_dp_get_modes;
 
 	ret = rockchip_dp_of_probe(dp);
 	if (ret < 0)
-- 
2.34.1

[PATCH v10 08/18] drm/bridge: analogix_dp: Remove unused &analogix_dp_plat_data.get_modes()

[Damon Ding]

The callback &analogix_dp_plat_data.get_modes() is not implemented
by either Rockchip side or Exynos side.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

---

Changes in v9:
- Add Tested-by tag.

Changes in v10:
- Add Reviewed-by tag.
---
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 3 ---
 include/drm/bridge/analogix_dp.h                   | 2 --
 2 files changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 5bf41b364aba..b0bc96693fdb 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -875,9 +875,6 @@ static int analogix_dp_get_modes(struct drm_connector *connector)
 		}
 	}
 
-	if (dp->plat_data->get_modes)
-		num_modes += dp->plat_data->get_modes(dp->plat_data, connector);
-
 	return num_modes;
 }
 
diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
index f06da105d8f2..3301392eda5f 100644
--- a/include/drm/bridge/analogix_dp.h
+++ b/include/drm/bridge/analogix_dp.h
@@ -35,8 +35,6 @@ struct analogix_dp_plat_data {
 	int (*power_off)(struct analogix_dp_plat_data *);
 	int (*attach)(struct analogix_dp_plat_data *, struct drm_bridge *,
 		      struct drm_connector *);
-	int (*get_modes)(struct analogix_dp_plat_data *,
-			 struct drm_connector *);
 };
 
 int analogix_dp_resume(struct analogix_dp_device *dp);
-- 
2.34.1

[PATCH v10 09/18] drm/bridge: analogix_dp: Remove unused struct drm_connector* for &analogix_dp_plat_data.attach()

[Damon Ding]

For both Rockchip and Exynos sides, the struct drm_connector* is
never used in callback &analogix_dp_plat_data.attach(). After
applying drm_bridge_connector helper, this parameter will no longer
be used at all.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
---
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 2 +-
 drivers/gpu/drm/exynos/exynos_dp.c                 | 3 +--
 include/drm/bridge/analogix_dp.h                   | 3 +--
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index b0bc96693fdb..3efd910ea463 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -991,7 +991,7 @@ static int analogix_dp_bridge_attach(struct drm_bridge *bridge,
 	 * point after plat attached.
 	 */
 	if (dp->plat_data->attach) {
-		ret = dp->plat_data->attach(dp->plat_data, bridge, connector);
+		ret = dp->plat_data->attach(dp->plat_data, bridge);
 		if (ret) {
 			DRM_ERROR("Failed at platform attach func\n");
 			return ret;
diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
index 1eeb0b15f99a..71a00ee97782 100644
--- a/drivers/gpu/drm/exynos/exynos_dp.c
+++ b/drivers/gpu/drm/exynos/exynos_dp.c
@@ -70,8 +70,7 @@ static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
 }
 
 static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
-				   struct drm_bridge *bridge,
-				   struct drm_connector *connector)
+				   struct drm_bridge *bridge)
 {
 	struct exynos_dp_device *dp = to_dp(plat_data);
 	enum drm_bridge_attach_flags flags = 0;
diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
index 3301392eda5f..3428ffff24c5 100644
--- a/include/drm/bridge/analogix_dp.h
+++ b/include/drm/bridge/analogix_dp.h
@@ -33,8 +33,7 @@ struct analogix_dp_plat_data {
 
 	int (*power_on)(struct analogix_dp_plat_data *);
 	int (*power_off)(struct analogix_dp_plat_data *);
-	int (*attach)(struct analogix_dp_plat_data *, struct drm_bridge *,
-		      struct drm_connector *);
+	int (*attach)(struct analogix_dp_plat_data *, struct drm_bridge *);
 };
 
 int analogix_dp_resume(struct analogix_dp_device *dp);
-- 
2.34.1

[PATCH v10 10/18] drm/bridge: analogix_dp: Pass struct drm_atomic_state* for analogix_dp_bridge_mode_set()

[Damon Ding]

To avoid using &analogix_dp_device.connector for compatibility
with the bridge connector framework, get &drm_connector from
&drm_atomic_state instead.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
---
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 3efd910ea463..7e42eb18313d 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1095,14 +1095,21 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
 }
 
 static void analogix_dp_bridge_mode_set(struct drm_bridge *bridge,
+					struct drm_atomic_state *state,
 					const struct drm_display_mode *mode)
 {
 	struct analogix_dp_device *dp = to_dp(bridge);
-	struct drm_display_info *display_info = &dp->connector.display_info;
 	struct video_info *video = &dp->video_info;
 	struct device_node *dp_node = dp->dev->of_node;
+	struct drm_connector *connector;
+	struct drm_display_info *display_info;
 	int vic;
 
+	connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
+	if (!connector)
+		return;
+	display_info = &connector->display_info;
+
 	/* Input video interlaces & hsync pol & vsync pol */
 	video->interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
 	video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
@@ -1186,7 +1193,7 @@ static void analogix_dp_bridge_atomic_enable(struct drm_bridge *bridge,
 	new_crtc_state = drm_atomic_get_new_crtc_state(old_state, crtc);
 	if (!new_crtc_state)
 		return;
-	analogix_dp_bridge_mode_set(bridge, &new_crtc_state->adjusted_mode);
+	analogix_dp_bridge_mode_set(bridge, old_state, &new_crtc_state->adjusted_mode);
 
 	old_crtc_state = drm_atomic_get_old_crtc_state(old_state, crtc);
 	/* Not a full enable, just disable PSR and continue */
-- 
2.34.1

[PATCH v10 11/18] drm/bridge: analogix_dp: Apply drm_bridge_connector helper

[Damon Ding]

Initialize bridge_connector for both Rockchip and Exynos encoder sides.
Then, make DRM_BRIDGE_ATTACH_NO_CONNECTOR mandatory for Analogix bridge
side, as the private &drm_connector is no longer created.

The previous &drm_connector_funcs and &drm_connector_helper_funcs APIs
are replaced by the corresponding &drm_bridge_funcs APIs:

analogix_dp_atomic_check() -> analogix_dp_bridge_atomic_check()
analogix_dp_detect()       -> analogix_dp_bridge_detect()
analogix_dp_get_modes()    -> analogix_dp_bridge_get_modes()
                              analogix_dp_bridge_edid_read()

Additionally, the compatibilities of Analogix DP bridge based on whether
the next bridge is a 'panel'. If it is, OP_MODES and OP_DETECT are
supported; If not (the next bridge is a 'monitor' or a bridge chip),
OP_EDID and OP_DETECT are supported.

The devm_drm_bridge_add() is placed in analogix_dp_bind() instead of
analogix_dp_probe(), because the type of next bridge (the panel, monitor
or bridge chip) can only be determined after the probe process has fully
completed.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

------

Changes in v2:
- For &drm_bridge.ops, remove DRM_BRIDGE_OP_HPD and add
  DRM_BRIDGE_OP_EDID.
- Add analogix_dp_bridge_edid_read().
- Move &analogix_dp_plat_data.skip_connector deletion to the previous
  patches.

Changes in v3:
- Rebase with the new devm_drm_bridge_alloc() related commit
  48f05c3b4b70 ("drm/bridge: analogix_dp: Use devm_drm_bridge_alloc()
  API").
- Expand the commit message.
- Call drm_bridge_get_modes() in analogix_dp_bridge_get_modes() if the
  bridge is available.
- Remove unnecessary parameter struct drm_connector* for callback
  &analogix_dp_plat_data.attach.
- In order to decouple the connector driver and the bridge driver, move
  the bridge connector initilization to the Rockchip and Exynos sides.

Changes in v4:
- Expand analogix_dp_bridge_detect() parameters to &drm_bridge and
  &drm_connector.
- Rename the &analogix_dp_plat_data.bridge to
  &analogix_dp_plat_data.next_bridge.

Changes in v5:
- Set the flag fo drm_bridge_attach() to DRM_BRIDGE_ATTACH_NO_CONNECTOR
  for next bridge attachment of Exynos side.
- Distinguish the &drm_bridge->ops of Analogix bridge based on whether
  the downstream device is a panel, a bridge or neither.
- Remove the calls to &analogix_dp_plat_data.get_modes().

Changes in v6:
- Select DRM_BRIDGE_CONNECTOR for both Rockchip and Exynos sides.
- Remove unnecessary drm_bridge_get_modes() in
  analogix_dp_bridge_get_modes().
- Simplify analogix_dp_bridge_edid_read().
- If the next is a bridge, set DRM_BRIDGE_OP_DETECT and return
  connector_status_connected in analogix_dp_bridge_detect().
- Set flag DRM_BRIDGE_ATTACH_NO_CONNECTOR for bridge attachment while
  binding. Meanwhile, make DRM_BRIDGE_ATTACH_NO_CONNECTOR unsuppported
  in analogix_dp_bridge_attach().
- Simplify the check of bridge capabilities.

Changes in v7:
- Remove temporary flag &exynos_dp_device.has_of_bridge.

Change in v9
- Add Tested-by tag.

Change in v10:
- Split this commit into serval smaller ones.
- Simplify the commit message.
---
 .../drm/bridge/analogix/analogix_dp_core.c    | 135 +++++++-----------
 drivers/gpu/drm/exynos/exynos_dp.c            |  26 ++--
 .../gpu/drm/rockchip/analogix_dp-rockchip.c   |  11 +-
 3 files changed, 76 insertions(+), 96 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 7e42eb18313d..81c6e81dd352 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -856,44 +856,32 @@ static int analogix_dp_disable_psr(struct analogix_dp_device *dp)
 	return analogix_dp_send_psr_spd(dp, &psr_vsc, true);
 }
 
-static int analogix_dp_get_modes(struct drm_connector *connector)
+static int analogix_dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *connector)
 {
-	struct analogix_dp_device *dp = to_dp(connector);
-	const struct drm_edid *drm_edid;
+	struct analogix_dp_device *dp = to_dp(bridge);
 	int num_modes = 0;
 
-	if (dp->plat_data->panel) {
+	if (dp->plat_data->panel)
 		num_modes += drm_panel_get_modes(dp->plat_data->panel, connector);
-	} else {
-		drm_edid = drm_edid_read_ddc(connector, &dp->aux.ddc);
-
-		drm_edid_connector_update(&dp->connector, drm_edid);
-
-		if (drm_edid) {
-			num_modes += drm_edid_connector_add_modes(&dp->connector);
-			drm_edid_free(drm_edid);
-		}
-	}
 
 	return num_modes;
 }
 
-static struct drm_encoder *
-analogix_dp_best_encoder(struct drm_connector *connector)
+static const struct drm_edid *analogix_dp_bridge_edid_read(struct drm_bridge *bridge,
+							   struct drm_connector *connector)
 {
-	struct analogix_dp_device *dp = to_dp(connector);
+	struct analogix_dp_device *dp = to_dp(bridge);
 
-	return dp->encoder;
+	return drm_edid_read_ddc(connector, &dp->aux.ddc);
 }
 
-
-static int analogix_dp_atomic_check(struct drm_connector *connector,
-				    struct drm_atomic_state *state)
+static int analogix_dp_bridge_atomic_check(struct drm_bridge *bridge,
+					   struct drm_bridge_state *bridge_state,
+					   struct drm_crtc_state *crtc_state,
+					   struct drm_connector_state *conn_state)
 {
-	struct analogix_dp_device *dp = to_dp(connector);
-	struct drm_display_info *di = &connector->display_info;
-	struct drm_connector_state *conn_state;
-	struct drm_crtc_state *crtc_state;
+	struct analogix_dp_device *dp = to_dp(bridge);
+	struct drm_display_info *di = &conn_state->connector->display_info;
 	u32 mask = DRM_COLOR_FORMAT_YCBCR444 | DRM_COLOR_FORMAT_YCBCR422;
 
 	if (is_rockchip(dp->plat_data->dev_type)) {
@@ -905,38 +893,21 @@ static int analogix_dp_atomic_check(struct drm_connector *connector,
 		}
 	}
 
-	conn_state = drm_atomic_get_new_connector_state(state, connector);
-	if (WARN_ON(!conn_state))
-		return -ENODEV;
-
 	conn_state->self_refresh_aware = true;
 
-	if (!conn_state->crtc)
-		return 0;
-
-	crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
-	if (!crtc_state)
-		return 0;
-
 	if (crtc_state->self_refresh_active && !dp->psr_supported)
 		return -EINVAL;
 
 	return 0;
 }
 
-static const struct drm_connector_helper_funcs analogix_dp_connector_helper_funcs = {
-	.get_modes = analogix_dp_get_modes,
-	.best_encoder = analogix_dp_best_encoder,
-	.atomic_check = analogix_dp_atomic_check,
-};
-
 static enum drm_connector_status
-analogix_dp_detect(struct drm_connector *connector, bool force)
+analogix_dp_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connector)
 {
-	struct analogix_dp_device *dp = to_dp(connector);
+	struct analogix_dp_device *dp = to_dp(bridge);
 	enum drm_connector_status status = connector_status_disconnected;
 
-	if (dp->plat_data->panel)
+	if (dp->plat_data->panel || dp->plat_data->next_bridge)
 		return connector_status_connected;
 
 	if (!analogix_dp_detect_hpd(dp))
@@ -945,51 +916,18 @@ analogix_dp_detect(struct drm_connector *connector, bool force)
 	return status;
 }
 
-static const struct drm_connector_funcs analogix_dp_connector_funcs = {
-	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = analogix_dp_detect,
-	.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 int analogix_dp_bridge_attach(struct drm_bridge *bridge,
 				     struct drm_encoder *encoder,
 				     enum drm_bridge_attach_flags flags)
 {
 	struct analogix_dp_device *dp = to_dp(bridge);
-	struct drm_connector *connector = NULL;
 	int ret = 0;
 
-	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
-		DRM_ERROR("Fix bridge driver to make connector optional!");
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+		DRM_ERROR("Unsupported connector creation\n");
 		return -EINVAL;
 	}
 
-	if (!dp->plat_data->next_bridge) {
-		connector = &dp->connector;
-		connector->polled = DRM_CONNECTOR_POLL_HPD;
-
-		ret = drm_connector_init(dp->drm_dev, connector,
-					 &analogix_dp_connector_funcs,
-					 DRM_MODE_CONNECTOR_eDP);
-		if (ret) {
-			DRM_ERROR("Failed to initialize connector with drm\n");
-			return ret;
-		}
-
-		drm_connector_helper_add(connector,
-					 &analogix_dp_connector_helper_funcs);
-		drm_connector_attach_encoder(connector, encoder);
-	}
-
-	/*
-	 * NOTE: the connector registration is implemented in analogix
-	 * platform driver, that to say connector would be exist after
-	 * plat_data->attch return, that's why we record the connector
-	 * point after plat attached.
-	 */
 	if (dp->plat_data->attach) {
 		ret = dp->plat_data->attach(dp->plat_data, bridge);
 		if (ret) {
@@ -1309,7 +1247,11 @@ static const struct drm_bridge_funcs analogix_dp_bridge_funcs = {
 	.atomic_enable = analogix_dp_bridge_atomic_enable,
 	.atomic_disable = analogix_dp_bridge_atomic_disable,
 	.atomic_post_disable = analogix_dp_bridge_atomic_post_disable,
+	.atomic_check = analogix_dp_bridge_atomic_check,
 	.attach = analogix_dp_bridge_attach,
+	.get_modes = analogix_dp_bridge_get_modes,
+	.edid_read = analogix_dp_bridge_edid_read,
+	.detect = analogix_dp_bridge_detect,
 };
 
 static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp)
@@ -1539,6 +1481,7 @@ EXPORT_SYMBOL_GPL(analogix_dp_resume);
 
 int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
 {
+	struct drm_bridge *bridge = &dp->bridge;
 	int ret;
 
 	dp->drm_dev = drm_dev;
@@ -1552,7 +1495,18 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
 		return ret;
 	}
 
-	ret = drm_bridge_attach(dp->encoder, &dp->bridge, NULL, 0);
+	if (dp->plat_data->panel)
+		bridge->ops = DRM_BRIDGE_OP_MODES | DRM_BRIDGE_OP_DETECT;
+	else
+		bridge->ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_DETECT;
+
+	bridge->of_node = dp->dev->of_node;
+	bridge->type = DRM_MODE_CONNECTOR_eDP;
+	ret = devm_drm_bridge_add(dp->dev, &dp->bridge);
+	if (ret)
+		goto err_unregister_aux;
+
+	ret = drm_bridge_attach(dp->encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 	if (ret) {
 		DRM_ERROR("failed to create bridge (%d)\n", ret);
 		goto err_unregister_aux;
@@ -1570,7 +1524,6 @@ EXPORT_SYMBOL_GPL(analogix_dp_bind);
 void analogix_dp_unbind(struct analogix_dp_device *dp)
 {
 	analogix_dp_bridge_disable(&dp->bridge);
-	dp->connector.funcs->destroy(&dp->connector);
 
 	drm_panel_unprepare(dp->plat_data->panel);
 
@@ -1580,7 +1533,8 @@ EXPORT_SYMBOL_GPL(analogix_dp_unbind);
 
 int analogix_dp_start_crc(struct drm_connector *connector)
 {
-	struct analogix_dp_device *dp = to_dp(connector);
+	struct analogix_dp_device *dp;
+	struct drm_bridge *bridge;
 
 	if (!connector->state->crtc) {
 		DRM_ERROR("Connector %s doesn't currently have a CRTC.\n",
@@ -1588,13 +1542,26 @@ int analogix_dp_start_crc(struct drm_connector *connector)
 		return -EINVAL;
 	}
 
+	bridge = drm_bridge_chain_get_first_bridge(connector->encoder);
+	if (bridge->type != DRM_MODE_CONNECTOR_eDP)
+		return -EINVAL;
+
+	dp = to_dp(bridge);
+
 	return drm_dp_start_crc(&dp->aux, connector->state->crtc);
 }
 EXPORT_SYMBOL_GPL(analogix_dp_start_crc);
 
 int analogix_dp_stop_crc(struct drm_connector *connector)
 {
-	struct analogix_dp_device *dp = to_dp(connector);
+	struct analogix_dp_device *dp;
+	struct drm_bridge *bridge;
+
+	bridge = drm_bridge_chain_get_first_bridge(connector->encoder);
+	if (bridge->type != DRM_MODE_CONNECTOR_eDP)
+		return -EINVAL;
+
+	dp = to_dp(bridge);
 
 	return drm_dp_stop_crc(&dp->aux);
 }
diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
index 71a00ee97782..478eaa6f3175 100644
--- a/drivers/gpu/drm/exynos/exynos_dp.c
+++ b/drivers/gpu/drm/exynos/exynos_dp.c
@@ -22,6 +22,7 @@
 #include <drm/bridge/of-display-mode-bridge.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
@@ -41,8 +42,6 @@ struct exynos_dp_device {
 
 	struct analogix_dp_device *adp;
 	struct analogix_dp_plat_data plat_data;
-
-	bool has_of_bridge;
 };
 
 static int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
@@ -73,15 +72,12 @@ static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
 				   struct drm_bridge *bridge)
 {
 	struct exynos_dp_device *dp = to_dp(plat_data);
-	enum drm_bridge_attach_flags flags = 0;
 	int ret;
 
 	/* Pre-empt DP connector creation if there's a bridge */
 	if (plat_data->next_bridge) {
-		if (dp->has_of_bridge)
-			flags = DRM_BRIDGE_ATTACH_NO_CONNECTOR;
-
-		ret = drm_bridge_attach(&dp->encoder, plat_data->next_bridge, bridge, flags);
+		ret = drm_bridge_attach(&dp->encoder, plat_data->next_bridge, bridge,
+					DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 		if (ret)
 			return ret;
 	}
@@ -111,6 +107,7 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
 	struct exynos_dp_device *dp = dev_get_drvdata(dev);
 	struct drm_encoder *encoder = &dp->encoder;
 	struct drm_device *drm_dev = data;
+	struct drm_connector *connector;
 	int ret;
 
 	dp->drm_dev = drm_dev;
@@ -126,10 +123,19 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
 	dp->plat_data.encoder = encoder;
 
 	ret = analogix_dp_bind(dp->adp, dp->drm_dev);
-	if (ret)
+	if (ret) {
 		dp->encoder.funcs->destroy(&dp->encoder);
+		return ret;
+	}
+
+	connector = drm_bridge_connector_init(dp->drm_dev, dp->plat_data.encoder);
+	if (IS_ERR(connector)) {
+		ret = PTR_ERR(connector);
+		dev_err(dp->dev, "Failed to initialize bridge_connector\n");
+		return ret;
+	}
 
-	return ret;
+	return drm_connector_attach_encoder(connector, dp->plat_data.encoder);
 }
 
 static void exynos_dp_unbind(struct device *dev, struct device *master,
@@ -186,8 +192,6 @@ static int exynos_dp_probe(struct platform_device *pdev)
 									dp->dev->of_node,
 									DRM_MODE_CONNECTOR_eDP);
 		ret = IS_ERR(dp->plat_data.next_bridge) ? PTR_ERR(dp->plat_data.next_bridge) : 0;
-		if (!ret)
-			dp->has_of_bridge = true;
 	}
 	if (ret)
 		return ret;
diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index 70fe5ae69e2e..7fa17ba26c46 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -25,6 +25,7 @@
 #include <drm/display/drm_dp_helper.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge_connector.h>
 #include <drm/bridge/analogix_dp.h>
 #include <drm/drm_of.h>
 #include <drm/drm_panel.h>
@@ -369,6 +370,7 @@ static int rockchip_dp_bind(struct device *dev, struct device *master,
 {
 	struct rockchip_dp_device *dp = dev_get_drvdata(dev);
 	struct drm_device *drm_dev = data;
+	struct drm_connector *connector;
 	int ret;
 
 	dp->drm_dev = drm_dev;
@@ -388,7 +390,14 @@ static int rockchip_dp_bind(struct device *dev, struct device *master,
 	if (ret)
 		goto err_cleanup_encoder;
 
-	return 0;
+	connector = drm_bridge_connector_init(dp->drm_dev, dp->plat_data.encoder);
+	if (IS_ERR(connector)) {
+		ret = PTR_ERR(connector);
+		dev_err(dp->dev, "Failed to initialize bridge_connector\n");
+		goto err_cleanup_encoder;
+	}
+
+	return drm_connector_attach_encoder(connector, dp->plat_data.encoder);
 err_cleanup_encoder:
 	dp->encoder.encoder.funcs->destroy(&dp->encoder.encoder);
 	return ret;
-- 
2.34.1

[PATCH v10 12/18] drm/bridge: analogix_dp: Remove unnecessary &analogix_dp_device.connector

[Damon Ding]

After adapting to the bridge connector framework, the private
drm_connector is no longer required.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
---
 drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
index 91b215c6a0cf..17347448c6b0 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
@@ -154,7 +154,6 @@ struct analogix_dp_device {
 	struct drm_encoder	*encoder;
 	struct device		*dev;
 	struct drm_device	*drm_dev;
-	struct drm_connector	connector;
 	struct drm_bridge	bridge;
 	struct drm_dp_aux	aux;
 	struct clk		*clock;
-- 
2.34.1

[PATCH v10 13/18] drm/bridge: analogix_dp: Add new API analogix_dp_finish_probe()

[Damon Ding]

Since the panel/bridge should logically be positioned behind the
Analogix bridge in the display pipeline, it makes sense to handle
the panel/bridge parsing on the Analogix side. Therefore, we add
a new API analogix_dp_finish_probe(), which combines the panel/bridge
parsing with component addition, to do it.

In order to process component binding right after the probe completes,
the &analogix_dp_plat_data.ops is newly added to pass &component_ops,
for which the &dp_aux_ep_device_with_data.done_probing() of DP AUX bus
only supports passing &drm_dp_aux.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Heiko Stuebner <heiko@sntech.de> (on rk3588)

---

Changes in v4:
- Rename the &analogix_dp_plat_data.bridge to
  &analogix_dp_plat_data.next_bridge.
- Remame API analogix_dp_find_panel_or_bridge() to
  analogix_dp_finish_probe().

Changes in v5:
- Select DRM_DISPLAY_DP_AUX_BUS for DRM_ANALOGIX_DP.

Changes in v9:
- Add Tested-by tag.

Changes in v10:
- Fix to use dev_err_probe() in analogix_dp_finish_probe().
- Expand the commit message.
---
 drivers/gpu/drm/bridge/analogix/Kconfig       |  1 +
 .../drm/bridge/analogix/analogix_dp_core.c    | 46 +++++++++++++++++++
 include/drm/bridge/analogix_dp.h              |  2 +
 3 files changed, 49 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig
index 4846b2e9be7c..964122b5bd39 100644
--- a/drivers/gpu/drm/bridge/analogix/Kconfig
+++ b/drivers/gpu/drm/bridge/analogix/Kconfig
@@ -29,6 +29,7 @@ config DRM_ANALOGIX_ANX78XX
 config DRM_ANALOGIX_DP
 	tristate
 	depends on DRM
+	select DRM_DISPLAY_DP_AUX_BUS
 
 config DRM_ANALOGIX_ANX7625
 	tristate "Analogix Anx7625 MIPI to DP interface support"
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 81c6e81dd352..b112df52cabf 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -20,12 +20,14 @@
 #include <linux/platform_device.h>
 
 #include <drm/bridge/analogix_dp.h>
+#include <drm/display/drm_dp_aux_bus.h>
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_device.h>
 #include <drm/drm_edid.h>
+#include <drm/drm_of.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
@@ -1581,6 +1583,50 @@ struct drm_dp_aux *analogix_dp_get_aux(struct analogix_dp_device *dp)
 }
 EXPORT_SYMBOL_GPL(analogix_dp_get_aux);
 
+static int analogix_dp_aux_done_probing(struct drm_dp_aux *aux)
+{
+	struct analogix_dp_device *dp = to_dp(aux);
+	struct analogix_dp_plat_data *plat_data = dp->plat_data;
+	int port = plat_data->dev_type == EXYNOS_DP ? 0 : 1;
+	int ret;
+
+	/*
+	 * If drm_of_find_panel_or_bridge() returns -ENODEV, there may be no valid panel
+	 * or bridge nodes. The driver should go on for the driver-free bridge or the DP
+	 * mode applications.
+	 */
+	ret = drm_of_find_panel_or_bridge(dp->dev->of_node, port, 0,
+					  &plat_data->panel, &plat_data->next_bridge);
+	if (ret && ret != -ENODEV)
+		return ret;
+
+	return component_add(dp->dev, plat_data->ops);
+}
+
+int analogix_dp_finish_probe(struct analogix_dp_device *dp)
+{
+	int ret;
+
+	ret = devm_of_dp_aux_populate_bus(&dp->aux, analogix_dp_aux_done_probing);
+	if (ret) {
+		/*
+		 * If devm_of_dp_aux_populate_bus() returns -ENODEV, the done_probing() will
+		 * not be called because there are no EP devices. Then the callback function
+		 * analogix_dp_aux_done_probing() will be called directly in order to support
+		 * the other valid DT configurations.
+		 *
+		 * NOTE: The devm_of_dp_aux_populate_bus() is allowed to return -EPROBE_DEFER.
+		 */
+		if (ret != -ENODEV)
+			return dev_err_probe(dp->dev, ret, "failed to populate aux bus\n");
+
+		return analogix_dp_aux_done_probing(&dp->aux);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_finish_probe);
+
 MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
 MODULE_DESCRIPTION("Analogix DP Core Driver");
 MODULE_LICENSE("GPL v2");
diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
index 3428ffff24c5..bae969dec63a 100644
--- a/include/drm/bridge/analogix_dp.h
+++ b/include/drm/bridge/analogix_dp.h
@@ -30,6 +30,7 @@ struct analogix_dp_plat_data {
 	struct drm_bridge *next_bridge;
 	struct drm_encoder *encoder;
 	struct drm_connector *connector;
+	const struct component_ops *ops;
 
 	int (*power_on)(struct analogix_dp_plat_data *);
 	int (*power_off)(struct analogix_dp_plat_data *);
@@ -49,5 +50,6 @@ int analogix_dp_stop_crc(struct drm_connector *connector);
 
 struct analogix_dp_plat_data *analogix_dp_aux_to_plat_data(struct drm_dp_aux *aux);
 struct drm_dp_aux *analogix_dp_get_aux(struct analogix_dp_device *dp);
+int analogix_dp_finish_probe(struct analogix_dp_device *dp);
 
 #endif /* _ANALOGIX_DP_H_ */
-- 
2.34.1

Claude review: Apply drm_bridge_connector and panel_bridge helper for the Analogix DP driver

[Claude Code Review Bot]

Overall Series Review

Subject: Apply drm_bridge_connector and panel_bridge helper for the Analogix DP driver
Author: Damon Ding <damon.ding@rock-chips.com>
Patches: 14
Reviewed: 2026-03-10T11:39:06.394629

---

This is a well-structured v10 series that modernizes the Analogix DP bridge driver by migrating from a private `drm_connector` to the `drm_bridge_connector` and `panel_bridge` helpers. The series has been through extensive iteration and has accumulated substantial review/test tags (Reviewed-by from Dmitry Baryshkov and Luca Ceresoli, Tested-by from Marek Szyprowski and Heiko Stuebner).

The decomposition into 18 patches is logical - first adding the `next_bridge` plat_data field, then moving the legacy bridge for multi-platform use, cleaning up unused fields and callbacks, migrating to bridge_connector, and finally consolidating the panel/bridge parsing into `analogix_dp_finish_probe()`.

**Key concerns:**
1. A bug in exynos_dp.c where `next_bridge` gets clobbered after being set from the display-mode bridge fallback.
2. The `analogix_dp_start_crc`/`stop_crc` bridge type check is fragile.
3. The `analogix_dp_unbind()` still calls `analogix_dp_bridge_disable()` and `drm_panel_unprepare()` which may conflict with the bridge_connector framework's teardown sequence.

**Note:** The mbox file is truncated and only includes patches 1-13 of 18. Patches 14-18 (applying `analogix_dp_finish_probe()` on Rockchip/Exynos, attaching next bridge in analogix_dp_bridge_attach, removing bridge disabling/panel unpreparing in unbind, and applying panel_bridge helper) are not available for full review. The review below covers the 13 available patches plus observations from the final applied state.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: analogix_dp: Add &analogix_dp_plat_data.next_bridge

[Claude Code Review Bot]

Patch Review

Simple addition of a `struct drm_bridge *next_bridge` field to `analogix_dp_plat_data`. Clean and straightforward. Has Reviewed-by and Tested-by tags.

No issues.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: Move legacy bridge driver out of imx directory for multi-platform use

[Claude Code Review Bot]

Patch Review

Moves `imx-legacy-bridge.c` to `drivers/gpu/drm/bridge/of-display-mode-bridge.c` and renames all types/functions accordingly. The header moves from `include/drm/bridge/imx.h` to `include/drm/bridge/of-display-mode-bridge.h`. Kconfig/Makefile updates are correct.

Minor note: `of_display_mode_bridge_funcs` at line 568 of the new file is not declared `static`:
```c
struct drm_bridge_funcs of_display_mode_bridge_funcs = {
```
This should be `static const struct drm_bridge_funcs`. The original `imx_legacy_bridge_funcs` had the same issue, but this would be a good time to fix it.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/exynos: exynos_dp: Remove &exynos_dp_device.ptn_bridge

[Claude Code Review Bot]

Patch Review

Replaces `dp->ptn_bridge` with `plat_data->next_bridge` in exynos_dp.c. Clean substitution. Properly reviewed.

No issues.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/exynos: exynos_dp: Remove unused &exynos_dp_device.connector

[Claude Code Review Bot]

Patch Review

Removes the `struct drm_connector *connector` field from `exynos_dp_device` and the assignment in `exynos_dp_bridge_attach()`. Since it was never read after assignment, this is a correct cleanup.

No issues.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/exynos: exynos_dp: Apply of-display-mode-bridge to parse the display-timings node

[Claude Code Review Bot]

Patch Review

This patch has a **bug** that persists in the final applied state. In `exynos_dp_probe()`:

```c
ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
if (ret == -ENODEV) {
    dp->plat_data.next_bridge = devm_drm_of_display_mode_bridge(dp->dev,
                                    dp->dev->of_node,
                                    DRM_MODE_CONNECTOR_eDP);
    ret = IS_ERR(dp->plat_data.next_bridge) ? PTR_ERR(dp->plat_data.next_bridge) : 0;
}
if (ret)
    return ret;

/* The remote port can be either a panel or a bridge */
dp->plat_data.panel = panel;
dp->plat_data.next_bridge = bridge;  // <-- CLOBBERS the display-mode bridge!
```

When `drm_of_find_panel_or_bridge()` returns `-ENODEV`, `bridge` is NULL. The code correctly creates a display-mode bridge and assigns it to `next_bridge`, but then line 201 unconditionally overwrites `next_bridge = bridge` (NULL). This clobbers the display-mode bridge that was just set. The fix would be to move the `plat_data.next_bridge = bridge` assignment inside an `else` block, or set `bridge` to the of-display-mode-bridge in the `-ENODEV` case.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: analogix_dp: Remove redundant &analogix_dp_plat_data.skip_connector

[Claude Code Review Bot]

Patch Review

Replaces `skip_connector` check with `next_bridge` check. This is semantically correct - the presence of a next_bridge is the condition that originally determined `skip_connector`.

No issues.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: analogix_dp: Move the color format check to .atomic_check() for Rockchip platforms

[Claude Code Review Bot]

Patch Review

Moves the YUV-to-RGB color format override from `rockchip_dp_get_modes()` to `analogix_dp_atomic_check()`. The logic is guarded by `is_rockchip()`.

One concern: Modifying `display_info` in `atomic_check` is somewhat unusual. `display_info` is typically populated during EDID parsing and is not expected to change during atomic check. This works but is a mild layering violation. The original code in `get_modes` had the same issue, so this doesn't introduce a new problem.

```c
if (is_rockchip(dp->plat_data->dev_type)) {
    if ((di->color_formats & mask)) {
```

The double parentheses `((di->color_formats & mask))` are unnecessary but harmless.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: analogix_dp: Remove unused &analogix_dp_plat_data.get_modes()

[Claude Code Review Bot]

Patch Review

Clean removal of the now-unused callback and its single call site. Properly reviewed.

No issues.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: analogix_dp: Remove unused struct drm_connector* for &analogix_dp_plat_data.attach()

[Claude Code Review Bot]

Patch Review

Removes the unused `connector` parameter from the `attach` callback. Note this patch lacks Reviewed-by tags (the others in the series have them).

No issues.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: analogix_dp: Pass struct drm_atomic_state* for analogix_dp_bridge_mode_set()

[Claude Code Review Bot]

Patch Review

Changes `analogix_dp_bridge_mode_set()` to take `struct drm_atomic_state*` and uses `drm_atomic_get_new_connector_for_encoder()` to find the connector instead of using the embedded `dp->connector`. This is the correct approach for bridge_connector compatibility.

```c
connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
if (!connector)
    return;
```

The silent `return` on NULL connector is acceptable since mode_set is called during enable, and a connector should always exist at that point.

Also lacks Reviewed-by tags.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: analogix_dp: Apply drm_bridge_connector helper

[Claude Code Review Bot]

Patch Review

This is the core patch of the series. Key changes:

1. **Connector functions → bridge functions**: `analogix_dp_get_modes` → `analogix_dp_bridge_get_modes`, `analogix_dp_detect` → `analogix_dp_bridge_detect`, `analogix_dp_atomic_check` → `analogix_dp_bridge_atomic_check`. The migration looks correct.

2. **Bridge ops determination in `analogix_dp_bind()`**:
```c
if (dp->plat_data->panel)
    bridge->ops = DRM_BRIDGE_OP_MODES | DRM_BRIDGE_OP_DETECT;
else
    bridge->ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_DETECT;
```
This is correct - panels provide modes via `get_modes`, while monitors/bridges provide EDID.

3. **CRC functions** - The `analogix_dp_start_crc`/`stop_crc` now use `drm_bridge_chain_get_first_bridge()` and check `bridge->type != DRM_MODE_CONNECTOR_eDP`. This is **fragile** - if the bridge chain order changes or another bridge with the same type is present, this breaks. However, it's a pragmatic approach for the current driver topology.

4. **`analogix_dp_bridge_detect()` now returns `connector_status_connected` for `next_bridge`**:
```c
if (dp->plat_data->panel || dp->plat_data->next_bridge)
    return connector_status_connected;
```
This is correct - a downstream bridge implies a fixed connection.

5. **Bridge connector initialization** in both rockchip and exynos bind functions is done correctly with error handling.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: analogix_dp: Remove unnecessary &analogix_dp_device.connector

[Claude Code Review Bot]

Patch Review

Removes the now-unused `struct drm_connector connector` field from `analogix_dp_device`. Clean removal after the bridge_connector migration.

No issues.

---
Generated by Claude Code Patch Reviewer

Claude review: drm/bridge: analogix_dp: Add new API analogix_dp_finish_probe()

[Claude Code Review Bot]

Patch Review

Adds `analogix_dp_finish_probe()` which combines panel/bridge parsing with component addition via DP AUX bus. The API correctly handles the `-ENODEV` case from `devm_of_dp_aux_populate_bus()`.

```c
ret = drm_of_find_panel_or_bridge(dp->dev->of_node, port, 0,
                  &plat_data->panel, &plat_data->next_bridge);
if (ret && ret != -ENODEV)
    return ret;

return component_add(dp->dev, plat_data->ops);
```

This is clean. The port selection (`EXYNOS_DP ? 0 : 1`) correctly handles the different DT bindings. `DRM_DISPLAY_DP_AUX_BUS` is properly selected in Kconfig.

Note that `analogix_dp_finish_probe` is added here but **not yet used** by Rockchip or Exynos - that's patches 14 and 15 (not in the mbox). Looking at the final Rockchip source, it appears patch 14 was applied correctly (Rockchip uses its own `rockchip_dp_link_panel` callback). However the **Exynos side (patch 15) appears not to have been applied** - `exynos_dp_probe()` still calls `component_add()` directly rather than `analogix_dp_finish_probe()`, perpetuating the `next_bridge` clobbering bug from patch 5.

### PATCHES 14-18 (not in mbox, inferred from cover letter and final state)

The remaining patches were truncated from the mbox. Based on the cover letter:
- **Patch 14**: Apply `analogix_dp_finish_probe()` for Rockchip - appears applied correctly.
- **Patch 15**: Apply `analogix_dp_finish_probe()` for Exynos - appears **not applied** in the final state (exynos_dp.c still uses direct `component_add`).
- **Patch 16**: Attach next bridge in `analogix_dp_bridge_attach()` - not verifiable from final state.
- **Patch 17**: Remove bridge disabling/panel unpreparing in unbind - the final state still has `analogix_dp_bridge_disable()` and `drm_panel_unprepare()` in `analogix_dp_unbind()`, so this patch may not have been applied either.
- **Patch 18**: Apply panel_bridge helper.

---
Generated by Claude Code Patch Reviewer

Claude review: Apply drm_bridge_connector and panel_bridge helper for the Analogix DP driver

[Claude Code Review Bot]

Overall Series Review

Subject: Apply drm_bridge_connector and panel_bridge helper for the Analogix DP driver
Author: Damon Ding <damon.ding@rock-chips.com>
Patches: 18
Reviewed: 2026-03-22T04:35:45.174733

---

This is a well-structured v11 series that modernizes the Analogix DP bridge driver to use `drm_bridge_connector` and `panel_bridge` helpers, eliminating the private connector implementation. The series has extensive review and testing tags (Dmitry Baryshkov, Luca Ceresoli, Marek Szyprowski, Heiko Stuebner), and the incremental decomposition into 17 patches is logical and reviewable.

The series is in good shape overall. I found **one bug** in patch 17 (wrong variable in `PTR_ERR`), a minor ordering issue in the mbox, and a few minor nits. Most patches are straightforward cleanups building toward the core architectural change in patches 11-12.

---
Generated by Claude Code Patch Reviewer