kernel/drivers/gpu/drm/bridge/simple-bridge.c, branch master

drm/bridge: simple: add the Algoltek AG6311 DP-to-HDMI bridge

2026-01-21T09:56:29Z

The Algoltek AG6311 is a transparent DisplayPort to HDMI bridge. Reviewed-by: Dmitry Baryshkov Signed-off-by: Val Packett Link: https://patch.msgid.link/20260120234029.419825-8-val@packett.cool Signed-off-by: Dmitry Baryshkov

drm/bridge: simple-bridge: get/put the next bridge

2025-12-30T09:11:33Z

This driver obtains a bridge pointer from of_drm_find_bridge() in the probe function and stores it until driver removal. of_drm_find_bridge() is deprecated. Move to of_drm_find_and_get_bridge() for the bridge to be refcounted and use bridge->next_bridge to put the reference on deallocation. Reviewed-by: Maxime Ripard Link: https://patch.msgid.link/20251216-drm-bridge-alloc-getput-drm_of_find_bridge-v3-9-b5165fab8058@bootlin.com Signed-off-by: Luca Ceresoli

drm/bridge: simple: add ASL CS5263 DP-to-HDMI bridge

2025-11-24T16:54:56Z

Add support for the transparent ASL CS5263 DP-to-HDMI bridge. Signed-off-by: Ettore Chimenti Signed-off-by: Georg Gottleuber Reviewed-by: Neil Armstrong Signed-off-by: Neil Armstrong Link: https://patch.msgid.link/20251121142623.251118-4-ggo@tuxedocomputers.com

drm/bridge: simple: add the Parade PS185HDM DP-to-HDMI bridge

2025-11-16T11:31:49Z

The Parade PS185HDM is a transparent Displayport to HDMI bridge. Reviewed-by: Dmitry Baryshkov Signed-off-by: Maud Spierings Link: https://patch.msgid.link/20251116-asus_usbc_dp-v2-2-cc8f51136c9f@hotmail.com Signed-off-by: Dmitry Baryshkov

drm/bridge: simple: add Realtek RTD2171 DP-to-HDMI bridge

2025-09-08T21:27:43Z

Add support for the transparent Realtek RTD2171 DP-to-HDMI bridge. Reviewed-by: Dmitry Baryshkov Signed-off-by: Neil Armstrong Link: https://lore.kernel.org/r/20250908-topic-x1e80100-hdmi-v3-2-c53b0f2bc2fb@linaro.org Signed-off-by: Dmitry Baryshkov

drm/bridge: simple-bridge: Add support for radxa ra620

2025-08-22T18:10:17Z

The RA620 is an active DP to HDMI converter chip, basically no software is involved to drive it. Add it to simple bridge to make it can be find by the drm bridge chain. Signed-off-by: Andy Yan Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20250822063959.692098-7-andyshrk@163.com Signed-off-by: Dmitry Baryshkov

drm/bridge: Pass down connector to drm bridge detect hook

2025-07-14T15:23:18Z

In some application scenarios, we hope to get the corresponding connector when the bridge's detect hook is invoked. In most cases, we can get the connector by drm_atomic_get_connector_for_encoder if the encoder attached to the bridge is enabled, however there will still be some scenarios where the detect hook of the bridge is called but the corresponding encoder has not been enabled yet. For instance, this occurs when the device is hot plug in for the first time. Since the call to bridge's detect is initiated by the connector, passing down the corresponding connector directly will make things simpler. Signed-off-by: Andy Yan Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20250703125027.311109-3-andyshrk@163.com [DB: added the chunk to the cdn-dp driver] Signed-off-by: Dmitry Baryshkov

drm: convert many bridge drivers from devm_kzalloc() to devm_drm_bridge_alloc() API

2025-05-23T13:03:47Z

devm_drm_bridge_alloc() is the new API to be used for allocating (and partially initializing) a private driver struct embedding a struct drm_bridge. For many drivers having a simple code flow in the probe function, this commit does a mass conversion automatically with the following semantic patch. The changes have been reviewed manually for correctness as well as to find any false positives. The patch has been applied with the explicit exclusion of bridge/panel.c, handled by a separate patch. After applying the semantic patch, manually fixed these issues: - 4 drivers need ERR_CAST() instead of PTR_ERR() as the function calling devm_drm_bridge_alloc() returns a pointer - re-added empty lines and comments that the script had removed but that should stay @@ type T; identifier C; identifier BR; expression DEV; expression FUNCS; @@ -T *C; +T *C; ... ( -C = devm_kzalloc(DEV, ...); -if (!C) - return -ENOMEM; +C = devm_drm_bridge_alloc(DEV, T, BR, FUNCS); +if (IS_ERR(C)) + return PTR_ERR(C); | -C = devm_kzalloc(DEV, ...); -if (!C) - return ERR_PTR(-ENOMEM); +C = devm_drm_bridge_alloc(DEV, T, BR, FUNCS); +if (IS_ERR(C)) + return PTR_ERR(C); ) ... -C->BR.funcs = FUNCS; Reviewed-by: Manikandan Muralidharan # microchip-lvds.c Reviewed-by: Douglas Anderson # parade-ps8640 Tested-by: Douglas Anderson # parade-ps8640 Acked-by: Maxime Ripard Link: https://lore.kernel.org/r/20250509-drm-bridge-convert-to-alloc-api-v3-2-b8bc1f16d7aa@bootlin.com [Luca: fixed trivial patch conflict in adv7511_drv.c while applying] Signed-off-by: Luca Ceresoli

drm/bridge: Add encoder parameter to drm_bridge_funcs.attach

2025-03-20T13:45:38Z

The drm_bridge structure contains an encoder pointer that is widely used by bridge drivers. This pattern is largely documented as deprecated in other KMS entities for atomic drivers. However, one of the main use of that pointer is done in attach to just call drm_bridge_attach on the next bridge to add it to the bridge list. While this dereferences the bridge->encoder pointer, it's effectively the same encoder the bridge was being attached to. We can make it more explicit by adding the encoder the bridge is attached to to the list of attach parameters. This also removes the need to dereference bridge->encoder in most drivers. Reviewed-by: Dmitry Baryshkov Reviewed-by: Douglas Anderson Tested-by: Douglas Anderson Tested-by: Luca Ceresoli Reviewed-by: Luca Ceresoli Link: https://patchwork.freedesktop.org/patch/msgid/20250313-bridge-connector-v6-1-511c54a604fb@kernel.org Signed-off-by: Maxime Ripard

drm: bridge: simple-bridge: use devm_drm_bridge_add in probe

2024-06-19T08:50:30Z

simple_bridge_probe() calls drm_bridge_add() Thus, drm_bridge_remove() must be called in the remove() callback. If we call devm_drm_bridge_add() instead, then drm_bridge_remove() will be called automatically at device release, and the remove() callback is no longer required. Signed-off-by: Marc Gonzalez Reviewed-by: Dmitry Baryshkov Reviewed-by: Neil Armstrong Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20240618-devm-simple-bridge-v1-1-c7ed8a09fcc5@freebox.fr