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(unknown [61.154.14.86]) by smtp.qiye.163.com (Hmail) with ESMTP id 528777a24; Tue, 27 Oct 2026 21:28:16 +0800 (GMT+08:00) From: Damon Ding To: Andrzej Hajda , Neil Armstrong , Robert Foss , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jingoo Han , Inki Dae , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Peter Griffin , Alim Akhtar , Heiko Stuebner , Sandy Huang Cc: Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Dmitry Baryshkov , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, Damon Ding Subject: [PATCH v5 02/18] drm/bridge: analogix_dp: Use bridge->next_bridge instead of plat_data field Date: Tue, 27 Oct 2026 21:27:54 +0800 Message-Id: <20261027132810.1746118-3-damon.ding@rock-chips.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261027132810.1746118-1-damon.ding@rock-chips.com> References: <20261027132810.1746118-1-damon.ding@rock-chips.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Tid: 0aa17d8c1bc603a8kunm87c266213d56da X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVkZHxgfVklOGE5JGRhKQ09PGVYVFA kWGhdVEwETFhoSFyQUDg9ZV1kYEgtZQVlNSlVKTk9VSk9VQ01ZV1kWGg8SFR0UWUFZT0tIVUpLSE pKQk1VSktLVUpCWQY+ DKIM-Signature: a=rsa-sha256; b=LTSFCUnfOrwXNfn6vfO42sY83HFDQb6l1MtQtkarQpCcFLCEhNwzRyk2f6aMOVsTDsNB8T6+R2CNw+Eo460CHJVR2K5kCQynPTgweudxyNs5jzaTvW4b7ODAfd2yL0bwN/hnlQxkgzatikPDyj814bqpHinOdUB/WrTfeNxTNfU=; c=relaxed/relaxed; s=default; d=rock-chips.com; v=1; bh=v9WUGyGZ+GPpo6rTg1cKFsNj7Hhgu8T0h9yJn2ON8FE=; h=date:mime-version:subject:message-id:from; The DRM bridge core provides a standard next_bridge field in struct drm_bridge for chaining downstream bridges. Use dp->bridge.next_bridge consistently inside the analogix_dp driver and drop the separate dp->plat_data->next_bridge field. The next bridge is now resolved in analogix_dp_aux_done_probing(): a display mode bridge is created for the legacy display-timings on the Exynos platforms, while the remote endpoint bridge (panel or bridge) is looked up via of_drm_get_bridge_by_endpoint() otherwise. The obtained references are transferred to bridge->next_bridge, which the bridge core automatically puts at bridge destroy time. Also select DRM_OF_DISPLAY_MODE_BRIDGE for DRM_ANALOGIX_DP and drop the now redundant select from the Exynos Kconfig, as the core now creates the display mode bridge itself. Suggested-by: Heiko Stuebner Link: https://lore.kernel.org/all/5609825.iZASKD2KPV@diego/ Tested-by: Heiko Stuebner Signed-off-by: Damon Ding --- Changes in v4: - Add Tested-by tag. Changes in v5: - Move this patch to the front of the patch series, as the following patches rely on the dp->bridge.next_bridge field it introduces. - Select DRM_OF_DISPLAY_MODE_BRIDGE for DRM_ANALOGIX_DP and drop the redundant select from the Exynos Kconfig, to fix the undefined reference build error. (kernel test robot) - Check the presence of the display-timings node with of_get_child_by_name() instead of of_get_display_timings(), to avoid leaking the allocated display timings. (Sashiko) --- drivers/gpu/drm/bridge/analogix/Kconfig | 1 + .../drm/bridge/analogix/analogix_dp_core.c | 50 +++++++++++-------- drivers/gpu/drm/exynos/Kconfig | 1 - drivers/gpu/drm/exynos/exynos_dp.c | 15 +----- include/drm/bridge/analogix_dp.h | 1 - 5 files changed, 30 insertions(+), 38 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig index 5672d83cb4a1..293d7b443163 100644 --- a/drivers/gpu/drm/bridge/analogix/Kconfig +++ b/drivers/gpu/drm/bridge/analogix/Kconfig @@ -33,6 +33,7 @@ config DRM_ANALOGIX_DP depends on DRM depends on OF select DRM_DISPLAY_DP_AUX_BUS + select DRM_OF_DISPLAY_MODE_BRIDGE 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 8bb4c48aa3b4..19f3cec5a691 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -21,6 +21,7 @@ #include #include +#include #include #include #include @@ -32,6 +33,8 @@ #include #include +#include