linux-kernel - Re: [PATCH v5 00/17] Apply drm_bridge_connector and panel

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Message-ID: <s76pkp6cir2s2x6xzhnuhkmvirn3l7gnrhlpuachldbeqztwoo@xqnsyyjxctxy>
Date: Fri, 12 Sep 2025 14:07:26 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Damon Ding <damon.ding@...k-chips.com>
Cc: andrzej.hajda@...el.com, neil.armstrong@...aro.org, rfoss@...nel.org,
        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, jingoohan1@...il.com, inki.dae@...sung.com,
        sw0312.kim@...sung.com, kyungmin.park@...sung.com, krzk@...nel.org,
        alim.akhtar@...sung.com, hjc@...k-chips.com, heiko@...ech.de,
        andy.yan@...k-chips.com, dianders@...omium.org,
        m.szyprowski@...sung.com, luca.ceresoli@...tlin.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v5 00/17] Apply drm_bridge_connector and panel_bridge
 helper for the Analogix DP driver

On Fri, Sep 12, 2025 at 04:58:29PM +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 3-9 are preparations for apply drm_bridge_connector helper.
> PATCH 10 is to apply the drm_bridge_connector helper.
> PATCH 11-14 are to move the panel/bridge parsing to the Analogix side.
> PATCH 15-16 are preparations for apply panel_bridge helper.
> PATCH 17 is to apply the panel_bridge helper.
> 
> Damon Ding (17):
>   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/exynos: exynos_dp: Remove &exynos_dp_device.ptn_bridge
>   drm/exynos: exynos_dp: Remove unused &exynos_dp_device.connector
>   drm/bridge: analogix_dp: Remove redundant
>     &analogix_dp_plat_data.skip_connector
>   drm/exynos: exynos_dp: Add legacy bridge to parse the display-timings
>     node
>   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: 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/rockchip: analogix_dp: Apply &analogix_dp_plat_data.attach() to
>     attach next bridge
>   drm/exynos: exynos_dp: Apply analogix_dp_finish_probe()
>   drm/bridge: analogix_dp: Remove panel disabling and enabling in
>     analogix_dp_set_bridge()
>   drm/bridge: analogix_dp: Remove bridge disabing and panel unpreparing
>     in analogix_dp_unbind()
>   drm/bridge: analogix_dp: Apply panel_bridge helper

This patch didn't make it to the maling list.

> 
>  drivers/gpu/drm/bridge/analogix/Kconfig       |   1 +
>  .../drm/bridge/analogix/analogix_dp_core.c    | 394 ++++++++++--------
>  .../drm/bridge/analogix/analogix_dp_core.h    |   5 +-
>  drivers/gpu/drm/exynos/exynos_dp.c            | 168 ++++----
>  drivers/gpu/drm/rockchip/Kconfig              |   1 -
>  .../gpu/drm/rockchip/analogix_dp-rockchip.c   |  74 ++--
>  include/drm/bridge/analogix_dp.h              |   9 +-
>  7 files changed, 342 insertions(+), 310 deletions(-)
> 
> ---
> 
> 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.
> 
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry