[PATCH v13 00/17] Apply drm_bridge_connector and panel_bridge helper for the Analogix DP driver

Damon Ding
2026-04-09T07:08:31Z

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 is to apply the drm_bridge_connector helper.
PATCH 12-14 are to move the panel/bridge parsing to the Analogix side.
PATCH 15 is to attach the next bridge on Analogix side uniformly.
PATCH 16-17 are to apply the panel_bridge helper.

Damon Ding (17):
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: 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 | 2 +
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 +-
drivers/gpu/drm/rockchip/Kconfig | 1 +
.../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 ++
19 files changed, 295 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.

Changes in v11:
- Merge [PATCH v10 12/18] into [PATCH v10 11/18].
- Fix the bridge flag to 'flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR' in
[PATCH v10 11/18].
- Add Reviewed-by tags from Luca.

Changes in v12:
- Restore accidentally removed DRM_BRIDGE_CONNECTOR Kconfig in v10.

Changes in v13:
- Modify '(on rk3588)' to '# rk3588' for Tested-by tag as discussed in
https://lore.kernel.org/all/571cc85a-3310-4b56-a3ef-3aab698192f6@rock-chips.com/
- Rebase [PATCH v12 2/17] after commit 02df94d98ff8 ("drm/imx: parallel-display:
add DRM_DISPLAY_HELPER for DRM_IMX_PARALLEL_DISPLAY")
- Rebase [PATCH v12 7/17] and [PATCH v12 11/17] after commit 01962a191242
("drm/rockchip: analogix: Convert to drm_output_color_format")

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2.34.1