linux-stable.git/drivers/gpu/drm/imx, branch v6.18

drm/imx: parallel-display: add the bridge before attaching it

2025-10-30T15:55:19+00:00

Invoking drm_bridge_add() is good practice, so add it to this driver.

Link: https://lore.kernel.org/all/DDHZ5GO9MPF0.CGYTVBI74FOZ@bootlin.com
Signed-off-by: Luca Ceresoli 
Reviewed-by: Louis Chauvet 
Link: https://patch.msgid.link/20251014-drm-bridge-alloc-imx-ipuv3-v1-2-a1bb1dcbff50@bootlin.com
Signed-off-by: Philipp Zabel

drm/imx: parallel-display: convert to devm_drm_bridge_alloc() API

2025-10-30T15:55:19+00:00

This is the new API for allocating DRM bridges.

This conversion was missed during the initial conversion of all bridges to
the new API. Thus all kernels with commit 94d50c1a2ca3 ("drm/bridge:
get/put the bridge reference in drm_bridge_attach/detach()") and using this
driver now warn due to drm_bridge_attach() incrementing the refcount, which
is not initialized without using devm_drm_bridge_alloc() for allocation.

To make the conversion simple and straightforward without messing up with
the drmm_simple_encoder_alloc(), move the struct drm_bridge from struct
imx_parallel_display_encoder to struct imx_parallel_display.

Also remove the 'struct imx_parallel_display *pd' from struct
imx_parallel_display_encoder, not needed anymore.

Fixes: 94d50c1a2ca3 ("drm/bridge: get/put the bridge reference in drm_bridge_attach/detach()")
Reported-by: Ernest Van Hoecke 
Closes: https://lore.kernel.org/all/hlf4wdopapxnh4rekl5s3kvoi6egaga3lrjfbx6r223ar3txri@3ik53xw5idyh/
Signed-off-by: Luca Ceresoli 
Reviewed-by: Louis Chauvet 
Tested-by: Ernest Van Hoecke 
Link: https://patch.msgid.link/20251014-drm-bridge-alloc-imx-ipuv3-v1-1-a1bb1dcbff50@bootlin.com
Signed-off-by: Philipp Zabel

drm/imx: Add i.MX8qxp Display Controller KMS

2025-05-14T07:11:31+00:00

i.MX8qxp Display Controller(DC) is comprised of three main components that
include a blit engine for 2D graphics accelerations, display controller for
display output processing, as well as a command sequencer.  Add kernel
mode setting support for the display controller part with two CRTCs and
two primary planes(backed by FetchLayer and FetchWarp respectively).  The
registers of the display controller are accessed without command sequencer
involved, instead just by using CPU.  The command sequencer is supposed to
be used by the blit engine.

Reviewed-by: Maxime Ripard 
Reviewed-by: Dmitry Baryshkov 
Signed-off-by: Liu Ying 
Link: https://lore.kernel.org/r/20250414035028.1561475-13-victor.liu@nxp.com

drm/imx: Add i.MX8qxp Display Controller interrupt controller

2025-05-14T07:10:39+00:00

i.MX8qxp Display Controller has a built-in interrupt controller to support
Enable/Status/Preset/Clear interrupt bit.  Add driver for it.

Reviewed-by: Maxime Ripard 
Reviewed-by: Dmitry Baryshkov 
Signed-off-by: Liu Ying 
Link: https://lore.kernel.org/r/20250414035028.1561475-12-victor.liu@nxp.com

drm/imx: Add i.MX8qxp Display Controller pixel engine

2025-05-14T07:09:04+00:00

i.MX8qxp Display Controller pixel engine consists of all processing
units that operate in the AXI bus clock domain.  Add drivers for
ConstFrame, ExtDst, FetchLayer, FetchWarp and LayerBlend units, as
well as a pixel engine driver, so that two displays with primary
planes can be supported.  The pixel engine driver and those unit
drivers are components to be aggregated by a master registered in
the upcoming DRM driver.

Reviewed-by: Maxime Ripard 
Signed-off-by: Liu Ying 
Reviewed-by: Dmitry Baryshkov 
Link: https://lore.kernel.org/r/20250414035028.1561475-11-victor.liu@nxp.com

drm/imx: Add i.MX8qxp Display Controller display engine

2025-05-14T07:08:54+00:00

i.MX8qxp Display Controller display engine consists of all processing
units that operate in a display clock domain.  Add minimal feature
support with FrameGen and TCon so that the engine can output display
timings.  The FrameGen driver, TCon driver and display engine driver
are components to be aggregated by a master registered in the upcoming
DRM driver.

Reviewed-by: Maxime Ripard 
Signed-off-by: Liu Ying 
Reviewed-by: Dmitry Baryshkov 
Link: https://lore.kernel.org/r/20250414035028.1561475-10-victor.liu@nxp.com

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/connector: make mode_valid take a const struct drm_display_mode

2025-01-07T10:45:19+00:00

The mode_valid() callbacks of drm_encoder, drm_crtc and drm_bridge
take a const struct drm_display_mode argument. Change the mode_valid
callback of drm_connector to also take a const argument.

Acked-by: Jani Nikula 
Reviewed-by: Liviu Dudau 
Reviewed-by: Raphael Gallais-Pou 
Reviewed-by: Laurent Pinchart 
Reviewed-by: Lyude Paul 
Reviewed-by: Maxime Ripard 
Reviewed-by: Thomas Zimmermann 
Reviewed-by: Harry Wentland 
Link: https://patchwork.freedesktop.org/patch/msgid/20241214-drm-connector-mode-valid-const-v2-5-4f9498a4c822@linaro.org
Signed-off-by: Dmitry Baryshkov

Merge remote-tracking branch 'drm/drm-next' into drm-misc-next

2024-12-09T15:35:21+00:00

The v6.13-rc2 release included a bunch of breaking changes,
specifically the MODULE_IMPORT_NS commit.

Backmerge in order to fix them before the next pull-request.

Include the fix from Stephen Roswell.

Caused by commit

  25c3fd1183c0 ("drm/virtio: Add a helper to map and note the dma addrs and lengths")

Interacting with commit

  cdd30ebb1b9f ("module: Convert symbol namespace to string literal")

Reported-by: Stephen Rothwell 
Link: https://patchwork.freedesktop.org/patch/msgid/20241209121717.2abe8026@canb.auug.org.au
Signed-off-by: Maarten Lankhorst

drm: remove driver date from struct drm_driver and all drivers

2024-12-05T10:35:42+00:00

We stopped using the driver initialized date in commit 7fb8af6798e8
("drm: deprecate driver date") and (eventually) started returning "0"
for drm_version ioctl instead.

Finish the job, and remove the unused date member from struct
drm_driver, its initialization from drivers, along with the common
DRIVER_DATE macros.

v2: Also update drivers/accel (kernel test robot)

Reviewed-by: Javier Martinez Canillas 
Acked-by: Alex Deucher 
Acked-by: Simon Ser 
Acked-by: Jeffrey Hugo 
Acked-by: Lucas De Marchi 
Acked-by: Dmitry Baryshkov  # msm
Reviewed-by: Thomas Zimmermann 
Link: https://patchwork.freedesktop.org/patch/msgid/1f2bf2543aed270a06f6c707fd6ed1b78bf16712.1733322525.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula