PATCH 1 is a small format optimization for struct analogid_dp_device.
PATCH 2 is to perform mode setting in &drm_bridge_funcs.atomic_enable.
PATCH 3 is to add a new parameter to store the point of next bridge.
PATCH 4 is to make legacy bridge driver more universal.
PATCH 5-10 are preparations for apply drm_bridge_connector helper.
PATCH 11 is to ensure last bridge determines OP_EDID/OP_MODES capabilities.
PATCH 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.

Damon Ding (18):
  drm/bridge: analogix_dp: Formalize the struct analogix_dp_device
  drm/bridge: analogix_dp: Move &drm_bridge_funcs.mode_set to
    &drm_bridge_funcs.atomic_enable
  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 legacy 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/display: bridge_connector: Ensure last bridge determines
    EDID/modes detection capabilities
  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    | 395 +++++++++---------
 .../drm/bridge/analogix/analogix_dp_core.h    |   5 +-
 drivers/gpu/drm/bridge/imx/Kconfig            |  10 -
 drivers/gpu/drm/bridge/imx/Makefile           |   1 -
 .../gpu/drm/bridge/imx/imx-legacy-bridge.c    |  91 ----
 drivers/gpu/drm/bridge/legacy-bridge.c        |  99 +++++
 .../gpu/drm/display/drm_bridge_connector.c    |  42 ++
 drivers/gpu/drm/exynos/Kconfig                |   2 +
 drivers/gpu/drm/exynos/exynos_dp.c            | 117 ++----
 drivers/gpu/drm/imx/ipuv3/Kconfig             |   4 +-
 drivers/gpu/drm/imx/ipuv3/imx-ldb.c           |   6 +-
 drivers/gpu/drm/imx/ipuv3/parallel-display.c  |   4 +-
 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/legacy-bridge.h            |  18 +
 20 files changed, 433 insertions(+), 466 deletions(-)
 delete mode 100644 drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c
 create mode 100644 drivers/gpu/drm/bridge/legacy-bridge.c
 delete mode 100644 include/drm/bridge/imx.h
 create mode 100644 include/drm/bridge/legacy-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.

-- 
2.34.1

On Tue, Sep 30, 2025 at 05:09:02PM +0800, Damon Ding wrote:
> PATCH 1 is a small format optimization for struct analogid_dp_device.
> PATCH 2 is to perform mode setting in &drm_bridge_funcs.atomic_enable.
> PATCH 3 is to add a new parameter to store the point of next bridge.
> PATCH 4 is to make legacy bridge driver more universal.
> PATCH 5-10 are preparations for apply drm_bridge_connector helper.
> PATCH 11 is to ensure last bridge determines OP_EDID/OP_MODES capabilities.
> PATCH 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.

Note, only patches 1-13 made it to the list:

https://lore.kernel.org/dri-devel/41c2a141-a72e-4780-ab32-f22f3a2e0179@samsung.com/#related


-- 
With best wishes
Dmitry

On 30.09.2025 11:09, Damon Ding wrote:
> PATCH 1 is a small format optimization for struct analogid_dp_device.
> PATCH 2 is to perform mode setting in &drm_bridge_funcs.atomic_enable.
> PATCH 3 is to add a new parameter to store the point of next bridge.
> PATCH 4 is to make legacy bridge driver more universal.
> PATCH 5-10 are preparations for apply drm_bridge_connector helper.
> PATCH 11 is to ensure last bridge determines OP_EDID/OP_MODES capabilities.
> PATCH 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.

Works fine on my Exynos based test boards with (e)DP displays. Thanks!

Feel free to update tags if needed:

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>


> Damon Ding (18):
>    drm/bridge: analogix_dp: Formalize the struct analogix_dp_device
>    drm/bridge: analogix_dp: Move &drm_bridge_funcs.mode_set to
>      &drm_bridge_funcs.atomic_enable
>    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 legacy 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/display: bridge_connector: Ensure last bridge determines
>      EDID/modes detection capabilities
>    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    | 395 +++++++++---------
>   .../drm/bridge/analogix/analogix_dp_core.h    |   5 +-
>   drivers/gpu/drm/bridge/imx/Kconfig            |  10 -
>   drivers/gpu/drm/bridge/imx/Makefile           |   1 -
>   .../gpu/drm/bridge/imx/imx-legacy-bridge.c    |  91 ----
>   drivers/gpu/drm/bridge/legacy-bridge.c        |  99 +++++
>   .../gpu/drm/display/drm_bridge_connector.c    |  42 ++
>   drivers/gpu/drm/exynos/Kconfig                |   2 +
>   drivers/gpu/drm/exynos/exynos_dp.c            | 117 ++----
>   drivers/gpu/drm/imx/ipuv3/Kconfig             |   4 +-
>   drivers/gpu/drm/imx/ipuv3/imx-ldb.c           |   6 +-
>   drivers/gpu/drm/imx/ipuv3/parallel-display.c  |   4 +-
>   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/legacy-bridge.h            |  18 +
>   20 files changed, 433 insertions(+), 466 deletions(-)
>   delete mode 100644 drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c
>   create mode 100644 drivers/gpu/drm/bridge/legacy-bridge.c
>   delete mode 100644 include/drm/bridge/imx.h
>   create mode 100644 include/drm/bridge/legacy-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.
>
Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

Hi Marek,

On 9/30/2025 6:17 PM, Marek Szyprowski wrote:
> On 30.09.2025 11:09, Damon Ding wrote:
>> PATCH 1 is a small format optimization for struct analogid_dp_device.
>> PATCH 2 is to perform mode setting in &drm_bridge_funcs.atomic_enable.
>> PATCH 3 is to add a new parameter to store the point of next bridge.
>> PATCH 4 is to make legacy bridge driver more universal.
>> PATCH 5-10 are preparations for apply drm_bridge_connector helper.
>> PATCH 11 is to ensure last bridge determines OP_EDID/OP_MODES capabilities.
>> PATCH 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.
> 
> Works fine on my Exynos based test boards with (e)DP displays. Thanks!
> 
> Feel free to update tags if needed:
> 
> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
> 

Thanks a lot for the testing and the tag!

Apologies for the delayed reply as I was on vacation. ;-)

> 
>> Damon Ding (18):
>>     drm/bridge: analogix_dp: Formalize the struct analogix_dp_device
>>     drm/bridge: analogix_dp: Move &drm_bridge_funcs.mode_set to
>>       &drm_bridge_funcs.atomic_enable
>>     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 legacy 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/display: bridge_connector: Ensure last bridge determines
>>       EDID/modes detection capabilities
>>     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    | 395 +++++++++---------
>>    .../drm/bridge/analogix/analogix_dp_core.h    |   5 +-
>>    drivers/gpu/drm/bridge/imx/Kconfig            |  10 -
>>    drivers/gpu/drm/bridge/imx/Makefile           |   1 -
>>    .../gpu/drm/bridge/imx/imx-legacy-bridge.c    |  91 ----
>>    drivers/gpu/drm/bridge/legacy-bridge.c        |  99 +++++
>>    .../gpu/drm/display/drm_bridge_connector.c    |  42 ++
>>    drivers/gpu/drm/exynos/Kconfig                |   2 +
>>    drivers/gpu/drm/exynos/exynos_dp.c            | 117 ++----
>>    drivers/gpu/drm/imx/ipuv3/Kconfig             |   4 +-
>>    drivers/gpu/drm/imx/ipuv3/imx-ldb.c           |   6 +-
>>    drivers/gpu/drm/imx/ipuv3/parallel-display.c  |   4 +-
>>    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/legacy-bridge.h            |  18 +
>>    20 files changed, 433 insertions(+), 466 deletions(-)
>>    delete mode 100644 drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c
>>    create mode 100644 drivers/gpu/drm/bridge/legacy-bridge.c
>>    delete mode 100644 include/drm/bridge/imx.h
>>    create mode 100644 include/drm/bridge/legacy-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.
>>

Best regards,
Damon