linux.git/drivers/gpu/drm/drm_atomic_uapi.c, branch v7.1 Linux kernel source tree drm/atomic: track individual colorop updates 2026-06-10T10:13:36+00:00 Melissa Wen mwen@igalia.com 2026-06-09T10:20:20+00:00 2e235e2a2784b12b735321e5b42240ca51c49b0f As we do for CRTC color mgmt properties, use color_mgmt_changed flag to track any value changes in the color pipeline of a given plane, so that drivers can update color blocks as soon as plane color pipeline or individual colorop values change. Since we're here, only announce and track changes to plane COLOR_PIPELINE prop if its value is actually changing. Fixes: 8c5ea1745f4c ("drm/colorop: Add BYPASS property") Fixes: 7fa3ee8c0a79 ("drm/colorop: Define LUT_1D interpolation") Fixes: 41651f9d42eb ("drm/colorop: Add 1D Curve subtype") Fixes: 3410108037d5 ("drm/colorop: Add multiplier type") Fixes: db971856bbe0 ("drm/colorop: Add 3D LUT support to color pipeline") Fixes: e5719e7f1900 ("drm/colorop: Add 3x4 CTM type") Fixes: 99a4e4f08abe ("drm/colorop: Add 1D Curve Custom LUT type") Fixes: 2afc3184f3b3 ("drm/plane: Add COLOR PIPELINE property") Reviewed-by: Harry Wentland <harry.wentland@amd.com> #v1 Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com> Reviewed-by: Alex Hung <alex.hung@amd.com> Fixes: 9ba25915efba ("drm/amd/display: Add support for sRGB EOTF in DEGAM block") Signed-off-by: Melissa Wen <mwen@igalia.com> Signed-off-by: Melissa Wen <melissa.srw@gmail.com> Link: https://patch.msgid.link/20260609110420.1298352-4-mwen@igalia.com 
As we do for CRTC color mgmt properties, use color_mgmt_changed flag to
track any value changes in the color pipeline of a given plane, so that
drivers can update color blocks as soon as plane color pipeline or
individual colorop values change. Since we're here, only announce and
track changes to plane COLOR_PIPELINE prop if its value is actually
changing.

Fixes: 8c5ea1745f4c ("drm/colorop: Add BYPASS property")
Fixes: 7fa3ee8c0a79 ("drm/colorop: Define LUT_1D interpolation")
Fixes: 41651f9d42eb ("drm/colorop: Add 1D Curve subtype")
Fixes: 3410108037d5 ("drm/colorop: Add multiplier type")
Fixes: db971856bbe0 ("drm/colorop: Add 3D LUT support to color pipeline")
Fixes: e5719e7f1900 ("drm/colorop: Add 3x4 CTM type")
Fixes: 99a4e4f08abe ("drm/colorop: Add 1D Curve Custom LUT type")
Fixes: 2afc3184f3b3 ("drm/plane: Add COLOR PIPELINE property")
Reviewed-by: Harry Wentland <harry.wentland@amd.com> #v1
Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Fixes: 9ba25915efba ("drm/amd/display: Add support for sRGB EOTF in DEGAM block")
Signed-off-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Melissa Wen <melissa.srw@gmail.com>
Link: https://patch.msgid.link/20260609110420.1298352-4-mwen@igalia.com
drm/colorop: make lut(1/3)d_interpolation props correctly behave as mutable 2026-06-10T10:13:35+00:00 Melissa Wen mwen@igalia.com 2026-06-09T10:20:19+00:00 94ff735296d371045fce163451a3d65e44ac4729 As interpolation props are actually mutable props, any changes should be handled by drm_colorop_state. Move their enum and make it correctly behaves as mutable. Fixes: 7fa3ee8c0a79 ("drm/colorop: Define LUT_1D interpolation") Fixes: db971856bbe0 ("drm/colorop: Add 3D LUT support to color pipeline") Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com> Reviewed-by: Alex Hung <alex.hung@amd.com> Fixes: 9ba25915efba ("drm/amd/display: Add support for sRGB EOTF in DEGAM block") Signed-off-by: Melissa Wen <mwen@igalia.com> Signed-off-by: Melissa Wen <melissa.srw@gmail.com> Link: https://patch.msgid.link/20260609110420.1298352-3-mwen@igalia.com 
As interpolation props are actually mutable props, any changes should be
handled by drm_colorop_state. Move their enum and make it correctly
behaves as mutable.

Fixes: 7fa3ee8c0a79 ("drm/colorop: Define LUT_1D interpolation")
Fixes: db971856bbe0 ("drm/colorop: Add 3D LUT support to color pipeline")
Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Fixes: 9ba25915efba ("drm/amd/display: Add support for sRGB EOTF in DEGAM block")
Signed-off-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Melissa Wen <melissa.srw@gmail.com>
Link: https://patch.msgid.link/20260609110420.1298352-3-mwen@igalia.com
drm: Add CRTC background color property 2026-03-18T09:59:57+00:00 Cristian Ciocaltea cristian.ciocaltea@collabora.com 2026-03-03T19:24:18+00:00 4c684596cde44d03dfd9624c86e1de4db0dcf121 Some display controllers can be hardware programmed to show non-black colors for pixels that are either not covered by any plane or are exposed through transparent regions of higher planes. This feature can help reduce memory bandwidth usage, e.g. in compositors managing a UI with a solid background color while using smaller planes to render the remaining content. To support this capability, introduce the BACKGROUND_COLOR standard DRM mode property, which can be attached to a CRTC through the drm_crtc_attach_background_color_property() helper function. Additionally, define a 64-bit ARGB format value to be built with the help of a couple of dedicated DRM_ARGB64_PREP*() helpers. Individual color components can be extracted with desired precision using the corresponding DRM_ARGB64_GET*() macros. Co-developed-by: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> Tested-by: Diederik de Haas <diederik@cknow-tech.com> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com> Link: https://patch.msgid.link/20260303-rk3588-bgcolor-v8-2-fee377037ad1@collabora.com Signed-off-by: Daniel Stone <daniels@collabora.com> 
Some display controllers can be hardware programmed to show non-black
colors for pixels that are either not covered by any plane or are
exposed through transparent regions of higher planes.  This feature can
help reduce memory bandwidth usage, e.g. in compositors managing a UI
with a solid background color while using smaller planes to render the
remaining content.

To support this capability, introduce the BACKGROUND_COLOR standard DRM
mode property, which can be attached to a CRTC through the
drm_crtc_attach_background_color_property() helper function.

Additionally, define a 64-bit ARGB format value to be built with the
help of a couple of dedicated DRM_ARGB64_PREP*() helpers.  Individual
color components can be extracted with desired precision using the
corresponding DRM_ARGB64_GET*() macros.

Co-developed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Tested-by: Diederik de Haas <diederik@cknow-tech.com>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://patch.msgid.link/20260303-rk3588-bgcolor-v8-2-fee377037ad1@collabora.com
Signed-off-by: Daniel Stone <daniels@collabora.com>
Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-22T01:09:51+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-22T00:37:42+00:00 bf4afc53b77aeaa48b5409da5c8da6bb4eff7f43 This was done entirely with mindless brute force, using git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' | xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/' to convert the new alloc_obj() users that had a simple GFP_KERNEL argument to just drop that argument. Note that due to the extreme simplicity of the scripting, any slightly more complex cases spread over multiple lines would not be triggered: they definitely exist, but this covers the vast bulk of the cases, and the resulting diff is also then easier to check automatically. For the same reason the 'flex' versions will be done as a separate conversion. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
This was done entirely with mindless brute force, using

    git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
        xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'

to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.

Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.

For the same reason the 'flex' versions will be done as a separate
conversion.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21T09:02:28+00:00 Kees Cook kees@kernel.org 2026-02-21T07:49:23+00:00 69050f8d6d075dc01af7a5f2f550a8067510366f This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook <kees@kernel.org> 
This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook <kees@kernel.org>
drm/atomic: verify that gamma/degamma LUTs are not too big 2026-01-14T00:18:31+00:00 Dmitry Baryshkov dmitry.baryshkov@oss.qualcomm.com 2026-01-06T03:09:57+00:00 cea6e6e8717e81de266aa496f44088b2b960aa32 The kernel specifies LUT table sizes in a separate property, however it doesn't enforce it as a maximum. Some drivers implement max size check on their own in the atomic_check path. Other drivers simply ignore the issue. Perform LUT size validation in the generic place. Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patch.msgid.link/20260106-drm-fix-lut-checks-v3-3-f7f979eb73c8@oss.qualcomm.com Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> 
The kernel specifies LUT table sizes in a separate property, however it
doesn't enforce it as a maximum. Some drivers implement max size check
on their own in the atomic_check path. Other drivers simply ignore the
issue. Perform LUT size validation in the generic place.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20260106-drm-fix-lut-checks-v3-3-f7f979eb73c8@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
drm/atomic: add max_size check to drm_property_replace_blob_from_id() 2026-01-14T00:18:31+00:00 Dmitry Baryshkov dmitry.baryshkov@oss.qualcomm.com 2026-01-06T03:09:56+00:00 ca59e33f5a1f642d13ae0e558fdbdd9aaa9fe203 The function drm_property_replace_blob_from_id() allows checking whether the blob size is equal to a predefined value. In case of variable-size properties (like the gamma / degamma LUTs) we might want to check for the blob size against the maximum, allowing properties of the size lesser than the max supported by the hardware. Extend the function in order to support such checks. Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patch.msgid.link/20260106-drm-fix-lut-checks-v3-2-f7f979eb73c8@oss.qualcomm.com Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> 
The function drm_property_replace_blob_from_id() allows checking whether
the blob size is equal to a predefined value. In case of variable-size
properties (like the gamma / degamma LUTs) we might want to check for
the blob size against the maximum, allowing properties of the size
lesser than the max supported by the hardware. Extend the function in
order to support such checks.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20260106-drm-fix-lut-checks-v3-2-f7f979eb73c8@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
drm/colorop: Add 3D LUT support to color pipeline 2025-11-26T22:09:42+00:00 Alex Hung alex.hung@amd.com 2025-11-15T00:02:10+00:00 db971856bbe0263d0ba78d641ea66d4fcdfc8fc3 It is to be used to enable HDR by allowing userpace to create and pass 3D LUTs to kernel and hardware. new drm_colorop_type: DRM_COLOROP_3D_LUT. Reviewed-by: Simon Ser <contact@emersion.fr> Signed-off-by: Alex Hung <alex.hung@amd.com> Reviewed-by: Daniel Stone <daniels@collabora.com> Reviewed-by: Melissa Wen <mwen@igalia.com> Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com> Signed-off-by: Simon Ser <contact@emersion.fr> Link: https://patch.msgid.link/20251115000237.3561250-46-alex.hung@amd.com 
It is to be used to enable HDR by allowing userpace to create and pass
3D LUTs to kernel and hardware.

new drm_colorop_type: DRM_COLOROP_3D_LUT.

Reviewed-by: Simon Ser <contact@emersion.fr>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patch.msgid.link/20251115000237.3561250-46-alex.hung@amd.com
drm/colorop: Define LUT_1D interpolation 2025-11-26T22:09:14+00:00 Harry Wentland harry.wentland@amd.com 2025-11-15T00:02:08+00:00 7fa3ee8c0a79b7a8b5fae422ca29da2fde6821ba We want to make sure userspace is aware of the 1D LUT interpolation. While linear interpolation is common it might not be supported on all HW. Give driver implementers a way to specify their interpolation. Reviewed-by: Simon Ser <contact@emersion.fr> Signed-off-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Harry Wentland <harry.wentland@amd.com> Reviewed-by: Daniel Stone <daniels@collabora.com> Reviewed-by: Melissa Wen <mwen@igalia.com> Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com> Signed-off-by: Simon Ser <contact@emersion.fr> Link: https://patch.msgid.link/20251115000237.3561250-44-alex.hung@amd.com 
We want to make sure userspace is aware of the 1D LUT
interpolation. While linear interpolation is common it
might not be supported on all HW. Give driver implementers
a way to specify their interpolation.

Reviewed-by: Simon Ser <contact@emersion.fr>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patch.msgid.link/20251115000237.3561250-44-alex.hung@amd.com
drm/colorop: Add multiplier type 2025-11-26T22:03:35+00:00 Alex Hung alex.hung@amd.com 2025-11-15T00:02:05+00:00 3410108037d5b01fb35d2e4e92c17c3abdf89186 This introduces a new drm_colorop_type: DRM_COLOROP_MULTIPLIER. It's a simple multiplier to all pixel values. The value is specified via a S31.32 fixed point provided via the "MULTIPLIER" property. Reviewed-by: Simon Ser <contact@emersion.fr> Signed-off-by: Alex Hung <alex.hung@amd.com> Reviewed-by: Daniel Stone <daniels@collabora.com> Reviewed-by: Melissa Wen <mwen@igalia.com> Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com> Signed-off-by: Simon Ser <contact@emersion.fr> Link: https://patch.msgid.link/20251115000237.3561250-41-alex.hung@amd.com 
This introduces a new drm_colorop_type: DRM_COLOROP_MULTIPLIER.

It's a simple multiplier to all pixel values. The value is
specified via a S31.32 fixed point provided via the
"MULTIPLIER" property.

Reviewed-by: Simon Ser <contact@emersion.fr>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patch.msgid.link/20251115000237.3561250-41-alex.hung@amd.com