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Message-Id: <20250930090920.131094-1-damon.ding@rock-chips.com>
Date: Tue, 30 Sep 2025 17:09:02 +0800
From: Damon Ding <damon.ding@...k-chips.com>
To: andrzej.hajda@...el.com,
	neil.armstrong@...aro.org,
	rfoss@...nel.org
Cc: Laurent.pinchart@...asonboard.com,
	jonas@...boo.se,
	jernej.skrabec@...il.com,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	inki.dae@...sung.com,
	sw0312.kim@...sung.com,
	kyungmin.park@...sung.com,
	krzk@...nel.org,
	alim.akhtar@...sung.com,
	jingoohan1@...il.com,
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	andy.yan@...k-chips.com,
	dmitry.baryshkov@....qualcomm.com,
	dianders@...omium.org,
	m.szyprowski@...sung.com,
	luca.ceresoli@...tlin.com,
	jani.nikula@...el.com,
	linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-rockchip@...ts.infradead.org,
	Damon Ding <damon.ding@...k-chips.com>
Subject: [PATCH v6 00/18] Apply drm_bridge_connector and panel_bridge helper for the Analogix DP driver

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


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