linux.git/drivers/gpu/drm/bridge/synopsys, branch v6.18

drm/bridge: synopsys: Add DW DPTX Controller support library

2025-08-28T12:49:51+00:00

The DW DP TX Controller is compliant with the DisplayPort Specification
Version 1.4 with the following features:

* DisplayPort 1.4a
* Main Link: 1/2/4 lanes
* Main Link Support 1.62Gbps, 2.7Gbps, 5.4Gbps and 8.1Gbps
* AUX channel 1Mbps
* Single Stream Transport(SST)
* Multistream Transport (MST)
* Type-C support (alternate mode)
* HDCP 2.2, HDCP 1.3
* Supports up to 8/10 bits per color component
* Supports RBG, YCbCr4:4:4, YCbCr4:2:2, YCbCr4:2:0
* Pixel clock up to 594MHz
* I2S, SPDIF audio interface

Add library with common helpers to make it can be shared with
other SoC.

Signed-off-by: Andy Yan 
Reviewed-by: Dmitry Baryshkov 
Tested-by: Sebastian Reichel 
Link: https://lore.kernel.org/r/20250822063959.692098-3-andyshrk@163.com
Signed-off-by: Dmitry Baryshkov

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

2025-07-14T15:23:18+00:00

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/bridge: Make dp/hdmi_audio_* callback keep the same paramter order with get_modes

2025-07-14T15:23:18+00:00

Make the dp/hdmi_audio_* callback maintain the same parameter order as
get_modes and edid_read: first the bridge, then the connector.

Signed-off-by: Andy Yan 
Reviewed-by: Dmitry Baryshkov 
Link: https://lore.kernel.org/r/20250703125027.311109-2-andyshrk@163.com
[DB: added the chunk to the cdn-dp driver]
Signed-off-by: Dmitry Baryshkov

drm/bridge: Include

2025-06-16T07:02:25+00:00

Fix compile-time warnings

  drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/analogix/analogix_dp_core.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/aux-bridge.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/aux-hpd-bridge.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/panel.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/samsung-dsim.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi2.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/drm_bridge.c: warning: EXPORT_SYMBOL() is used, but #include  is missing
  drivers/gpu/drm/drm_bridge_helper.c: warning: EXPORT_SYMBOL() is used, but #include  is missing

Signed-off-by: Thomas Zimmermann 
Fixes: a934a57a42f6 ("scripts/misc-check: check missing #include  when W=1")
Reviewed-by: André Almeida 
Cc: Masahiro Yamada 
Cc: Nathan Chancellor 
Link: https://lore.kernel.org/r/20250612121633.229222-4-tzimmermann@suse.de

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

2025-05-23T13:03:47+00:00

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: dw-hdmi: convert to devm_drm_bridge_alloc() API

2025-04-29T09:21:21+00:00

This is the new API for allocating DRM bridges.

Signed-off-by: Luca Ceresoli 
Reviewed-by: Cristian Ciocaltea 
Link: https://patchwork.freedesktop.org/patch/msgid/20250424-drm-bridge-convert-to-alloc-api-v2-11-8f91a404d86b@bootlin.com
Signed-off-by: Louis Chauvet

drm/bridge: dw-hdmi: Avoid including uapi headers

2025-04-16T22:54:06+00:00

It is not recommended for drivers to include UAPI header
directly.

Signed-off-by: Andy Yan 
Reviewed-by: Heiko Stuebner 
Reviewed-by: Neil Armstrong 
Link: https://lore.kernel.org/r/20250411115941.318558-1-andyshrk@163.com
Signed-off-by: Dmitry Baryshkov

drm/bridge: split HDMI Audio from DRM_BRIDGE_OP_HDMI

2025-04-07T12:48:23+00:00

As pointed out by Laurent, OP bits are supposed to describe operations.
Split DRM_BRIDGE_OP_HDMI_AUDIO from DRM_BRIDGE_OP_HDMI instead of
overloading DRM_BRIDGE_OP_HDMI.

Signed-off-by: Dmitry Baryshkov 
Reviewed-by: Maxime Ripard 
Link: https://lore.kernel.org/r/20250314-dp-hdmi-audio-v6-1-dbd228fa73d7@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov

drm/bridge: Add encoder parameter to drm_bridge_funcs.attach

2025-03-20T13:45:38+00:00

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: synopsys: Add audio support for dw-hdmi-qp

2025-02-27T10:43:21+00:00

Register the dw-hdmi-qp bridge driver as an HDMI audio codec.

The register values computation functions (for n) are based on the
downstream driver, as well as the register writing functions.

The driver uses the generic HDMI Codec framework in order to implement
the HDMI audio support.

Signed-off-by: Sugar Zhang 
Reviewed-by: Dmitry Baryshkov 
Tested-by: Quentin Schulz 
Reviewed-by: Robert Foss 
Signed-off-by: Detlev Casanova 
Signed-off-by: Heiko Stuebner 
Link: https://patchwork.freedesktop.org/patch/msgid/20250217215641.372723-2-detlev.casanova@collabora.com