<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-stable.git/drivers/gpu/drm/arm/display, branch linux-6.16.y</title>
<subtitle>Linux kernel stable tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/'/>
<entry>
<title>Merge tag 'drm-misc-next-2025-02-12' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next</title>
<updated>2025-02-14T00:24:02+00:00</updated>
<author>
<name>Dave Airlie</name>
<email>airlied@redhat.com</email>
</author>
<published>2025-02-14T00:17:26+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=0ed1356af8f629ae807963b7db4e501e3b580bc2'/>
<id>0ed1356af8f629ae807963b7db4e501e3b580bc2</id>
<content type='text'>
drm-misc-next for v6.15:

UAPI Changes:

fourcc:
- Add modifiers for MediaTek tiled formats

Cross-subsystem Changes:

bus:
- mhi: Enable image transfer via BHIe in PBL

dma-buf:
- Add fast-path for single-fence merging

Core Changes:

atomic helper:
- Allow full modeset on connector changes
- Clarify semantics of allow_modeset
- Clarify semantics of drm_atomic_helper_check()

buddy allocator:
- Fix multi-root cleanup

ci:
- Update IGT

display:
- dp: Support Extendeds Wake Timeout
- dp_mst: Fix RAD-to-string conversion

panic:
- Encode QR code according to Fido 2.2

probe helper:
- Cleanups

scheduler:
- Cleanups

ttm:
- Refactor pool-allocation code
- Cleanups

Driver Changes:

amdxdma:
- Fix error handling
- Cleanups

ast:
- Refactor detection of transmitter chips
- Refactor support of VBIOS display-mode handling
- astdp: Fix connection status; Filter unsupported display modes

bridge:
- adv7511: Report correct capabilities
- it6505: Fix HDCP V compare
- sn65dsi86: Fix device IDs
- Cleanups

i915:
- Enable Extendeds Wake Timeout

imagination:
- Check job dependencies with DRM-sched helper

ivpu:
- Improve command-queue handling
- Use workqueue for IRQ handling
- Add suport for HW fault injection
- Locking fixes
- Cleanups

mgag200:
- Add support for G200eH5 chips

msm:
- dpu: Add concurrent writeback support for DPU 10.x+

nouveau:
- Move drm_slave_encoder interface into driver
- nvkm: Refactor GSP RPC

omapdrm:
- Cleanups

panel:
- Convert several panels to multi-style functions to improve error
  handling
- edp: Add support for B140UAN04.4, BOE NV140FHM-NZ, CSW MNB601LS1-3,
  LG LP079QX1-SP0V, MNE007QS3-7, STA 116QHD024002, Starry 116KHD024006,
  Lenovo T14s Gen6 Snapdragon
- himax-hx83102: Add support for CSOT PNA957QT1-1, Kingdisplay
  kd110n11-51ie, Starry 2082109qfh040022-50e

panthor:
- Expose sizes of intenral BOs via fdinfo
- Fix race between reset and suspend
- Cleanups

qaic:
- Add support for AIC200
- Cleanups

renesas:
- Fix limits in DT bindings

rockchip:
- rk3576: Add HDMI support
- vop2: Add new display modes on RK3588 HDMI0 up to 4K
- Don't change HDMI reference clock rate
- Fix DT bindings

solomon:
- Set SPI device table to silence warnings
- Fix pixel and scanline encoding

v3d:
- Cleanups

vc4:
- Use drm_exec
- Use dma-resv for wait-BO ioctl
- Remove seqno infrastructure

virtgpu:
- Support partial mappings of GEM objects
- Reserve VGA resources during initialization
- Fix UAF in virtgpu_dma_buf_free_obj()
- Add panic support

vkms:
- Switch to a managed modesetting pipeline
- Add support for ARGB8888

xlnx:
- Set correct DMA segment size
- Fix error handling
- Fix docs

Signed-off-by: Dave Airlie &lt;airlied@redhat.com&gt;

From: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20250212090625.GA24865@linux.fritz.box
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
drm-misc-next for v6.15:

UAPI Changes:

fourcc:
- Add modifiers for MediaTek tiled formats

Cross-subsystem Changes:

bus:
- mhi: Enable image transfer via BHIe in PBL

dma-buf:
- Add fast-path for single-fence merging

Core Changes:

atomic helper:
- Allow full modeset on connector changes
- Clarify semantics of allow_modeset
- Clarify semantics of drm_atomic_helper_check()

buddy allocator:
- Fix multi-root cleanup

ci:
- Update IGT

display:
- dp: Support Extendeds Wake Timeout
- dp_mst: Fix RAD-to-string conversion

panic:
- Encode QR code according to Fido 2.2

probe helper:
- Cleanups

scheduler:
- Cleanups

ttm:
- Refactor pool-allocation code
- Cleanups

Driver Changes:

amdxdma:
- Fix error handling
- Cleanups

ast:
- Refactor detection of transmitter chips
- Refactor support of VBIOS display-mode handling
- astdp: Fix connection status; Filter unsupported display modes

bridge:
- adv7511: Report correct capabilities
- it6505: Fix HDCP V compare
- sn65dsi86: Fix device IDs
- Cleanups

i915:
- Enable Extendeds Wake Timeout

imagination:
- Check job dependencies with DRM-sched helper

ivpu:
- Improve command-queue handling
- Use workqueue for IRQ handling
- Add suport for HW fault injection
- Locking fixes
- Cleanups

mgag200:
- Add support for G200eH5 chips

msm:
- dpu: Add concurrent writeback support for DPU 10.x+

nouveau:
- Move drm_slave_encoder interface into driver
- nvkm: Refactor GSP RPC

omapdrm:
- Cleanups

panel:
- Convert several panels to multi-style functions to improve error
  handling
- edp: Add support for B140UAN04.4, BOE NV140FHM-NZ, CSW MNB601LS1-3,
  LG LP079QX1-SP0V, MNE007QS3-7, STA 116QHD024002, Starry 116KHD024006,
  Lenovo T14s Gen6 Snapdragon
- himax-hx83102: Add support for CSOT PNA957QT1-1, Kingdisplay
  kd110n11-51ie, Starry 2082109qfh040022-50e

panthor:
- Expose sizes of intenral BOs via fdinfo
- Fix race between reset and suspend
- Cleanups

qaic:
- Add support for AIC200
- Cleanups

renesas:
- Fix limits in DT bindings

rockchip:
- rk3576: Add HDMI support
- vop2: Add new display modes on RK3588 HDMI0 up to 4K
- Don't change HDMI reference clock rate
- Fix DT bindings

solomon:
- Set SPI device table to silence warnings
- Fix pixel and scanline encoding

v3d:
- Cleanups

vc4:
- Use drm_exec
- Use dma-resv for wait-BO ioctl
- Remove seqno infrastructure

virtgpu:
- Support partial mappings of GEM objects
- Reserve VGA resources during initialization
- Fix UAF in virtgpu_dma_buf_free_obj()
- Add panic support

vkms:
- Switch to a managed modesetting pipeline
- Add support for ARGB8888

xlnx:
- Set correct DMA segment size
- Fix error handling
- Fix docs

Signed-off-by: Dave Airlie &lt;airlied@redhat.com&gt;

From: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20250212090625.GA24865@linux.fritz.box
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge remote-tracking branch 'drm-misc/drm-misc-next-fixes' into drm-misc-fixes</title>
<updated>2025-02-06T08:59:35+00:00</updated>
<author>
<name>Maxime Ripard</name>
<email>mripard@kernel.org</email>
</author>
<published>2025-02-06T08:59:35+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=2c1ed907520c50326b8f604907a8478b27881a2e'/>
<id>2c1ed907520c50326b8f604907a8478b27881a2e</id>
<content type='text'>
Merge the few remaining patches stuck into drm-misc-next-fixes.

Signed-off-by: Maxime Ripard &lt;mripard@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Merge the few remaining patches stuck into drm-misc-next-fixes.

Signed-off-by: Maxime Ripard &lt;mripard@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/komeda: Add check for komeda_get_layer_fourcc_list()</title>
<updated>2025-01-29T19:59:04+00:00</updated>
<author>
<name>Haoxiang Li</name>
<email>haoxiang_li2024@163.com</email>
</author>
<published>2024-12-19T09:02:56+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=79fc672a092d93a7eac24fe20a571d4efd8fa5a4'/>
<id>79fc672a092d93a7eac24fe20a571d4efd8fa5a4</id>
<content type='text'>
Add check for the return value of komeda_get_layer_fourcc_list()
to catch the potential exception.

Fixes: 5d51f6c0da1b ("drm/komeda: Add writeback support")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li &lt;haoxiang_li2024@163.com&gt;
Acked-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Link: https://lore.kernel.org/r/20241219090256.146424-1-haoxiang_li2024@163.com
Signed-off-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Add check for the return value of komeda_get_layer_fourcc_list()
to catch the potential exception.

Fixes: 5d51f6c0da1b ("drm/komeda: Add writeback support")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li &lt;haoxiang_li2024@163.com&gt;
Acked-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Link: https://lore.kernel.org/r/20241219090256.146424-1-haoxiang_li2024@163.com
Signed-off-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/connector: make mode_valid take a const struct drm_display_mode</title>
<updated>2025-01-07T10:45:19+00:00</updated>
<author>
<name>Dmitry Baryshkov</name>
<email>dmitry.baryshkov@linaro.org</email>
</author>
<published>2024-12-14T13:37:09+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=26d6fd81916e62d2b0568d9756e5f9c33f0f9b7a'/>
<id>26d6fd81916e62d2b0568d9756e5f9c33f0f9b7a</id>
<content type='text'>
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 &lt;jani.nikula@intel.com&gt;
Reviewed-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Reviewed-by: Raphael Gallais-Pou &lt;rgallaispou@gmail.com&gt;
Reviewed-by: Laurent Pinchart &lt;laurent.pinchart+renesas@ideasonboard.com&gt;
Reviewed-by: Lyude Paul &lt;lyude@redhat.com&gt;
Reviewed-by: Maxime Ripard &lt;mripard@kernel.org&gt;
Reviewed-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Reviewed-by: Harry Wentland &lt;harry.wentland@amd.com&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20241214-drm-connector-mode-valid-const-v2-5-4f9498a4c822@linaro.org
Signed-off-by: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
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 &lt;jani.nikula@intel.com&gt;
Reviewed-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Reviewed-by: Raphael Gallais-Pou &lt;rgallaispou@gmail.com&gt;
Reviewed-by: Laurent Pinchart &lt;laurent.pinchart+renesas@ideasonboard.com&gt;
Reviewed-by: Lyude Paul &lt;lyude@redhat.com&gt;
Reviewed-by: Maxime Ripard &lt;mripard@kernel.org&gt;
Reviewed-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Reviewed-by: Harry Wentland &lt;harry.wentland@amd.com&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20241214-drm-connector-mode-valid-const-v2-5-4f9498a4c822@linaro.org
Signed-off-by: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge remote-tracking branch 'drm/drm-next' into drm-misc-next</title>
<updated>2024-12-09T15:35:21+00:00</updated>
<author>
<name>Maarten Lankhorst</name>
<email>dev@lankhorst.se</email>
</author>
<published>2024-12-09T15:28:17+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=33f029af89791f5d55cbfcb72a6c1b32a8905584'/>
<id>33f029af89791f5d55cbfcb72a6c1b32a8905584</id>
<content type='text'>
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 &lt;sfr@canb.auug.org.au&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20241209121717.2abe8026@canb.auug.org.au
Signed-off-by: Maarten Lankhorst &lt;dev@lankhorst.se&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
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 &lt;sfr@canb.auug.org.au&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20241209121717.2abe8026@canb.auug.org.au
Signed-off-by: Maarten Lankhorst &lt;dev@lankhorst.se&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm: remove driver date from struct drm_driver and all drivers</title>
<updated>2024-12-05T10:35:42+00:00</updated>
<author>
<name>Jani Nikula</name>
<email>jani.nikula@intel.com</email>
</author>
<published>2024-12-04T14:31:12+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=cb2e1c2136f71618142557ceca3a8802e87a44cd'/>
<id>cb2e1c2136f71618142557ceca3a8802e87a44cd</id>
<content type='text'>
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 &lt;javierm@redhat.com&gt;
Acked-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
Acked-by: Simon Ser &lt;contact@emersion.fr&gt;
Acked-by: Jeffrey Hugo &lt;quic_jhugo@quicinc.com&gt;
Acked-by: Lucas De Marchi &lt;lucas.demarchi@intel.com&gt;
Acked-by: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt; # msm
Reviewed-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/1f2bf2543aed270a06f6c707fd6ed1b78bf16712.1733322525.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula &lt;jani.nikula@intel.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
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 &lt;javierm@redhat.com&gt;
Acked-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
Acked-by: Simon Ser &lt;contact@emersion.fr&gt;
Acked-by: Jeffrey Hugo &lt;quic_jhugo@quicinc.com&gt;
Acked-by: Lucas De Marchi &lt;lucas.demarchi@intel.com&gt;
Acked-by: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt; # msm
Reviewed-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/1f2bf2543aed270a06f6c707fd6ed1b78bf16712.1733322525.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula &lt;jani.nikula@intel.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>Get rid of 'remove_new' relic from platform driver struct</title>
<updated>2024-12-01T23:12:43+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2024-12-01T23:12:43+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=e70140ba0d2b1a30467d4af6bcfe761327b9ec95'/>
<id>e70140ba0d2b1a30467d4af6bcfe761327b9ec95</id>
<content type='text'>
The continual trickle of small conversion patches is grating on me, and
is really not helping.  Just get rid of the 'remove_new' member
function, which is just an alias for the plain 'remove', and had a
comment to that effect:

  /*
   * .remove_new() is a relic from a prototype conversion of .remove().
   * New drivers are supposed to implement .remove(). Once all drivers are
   * converted to not use .remove_new any more, it will be dropped.
   */

This was just a tree-wide 'sed' script that replaced '.remove_new' with
'.remove', with some care taken to turn a subsequent tab into two tabs
to make things line up.

I did do some minimal manual whitespace adjustment for places that used
spaces to line things up.

Then I just removed the old (sic) .remove_new member function, and this
is the end result.  No more unnecessary conversion noise.

Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The continual trickle of small conversion patches is grating on me, and
is really not helping.  Just get rid of the 'remove_new' member
function, which is just an alias for the plain 'remove', and had a
comment to that effect:

  /*
   * .remove_new() is a relic from a prototype conversion of .remove().
   * New drivers are supposed to implement .remove(). Once all drivers are
   * converted to not use .remove_new any more, it will be dropped.
   */

This was just a tree-wide 'sed' script that replaced '.remove_new' with
'.remove', with some care taken to turn a subsequent tab into two tabs
to make things line up.

I did do some minimal manual whitespace adjustment for places that used
spaces to line things up.

Then I just removed the old (sic) .remove_new member function, and this
is the end result.  No more unnecessary conversion noise.

Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/client: Move public client header to clients/ subdirectory</title>
<updated>2024-11-15T08:42:13+00:00</updated>
<author>
<name>Thomas Zimmermann</name>
<email>tzimmermann@suse.de</email>
</author>
<published>2024-11-08T15:42:38+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=b86711c6d6e20eb945fe878de98ef7c9be2c2088'/>
<id>b86711c6d6e20eb945fe878de98ef7c9be2c2088</id>
<content type='text'>
Move the public header file drm_client_setup.h to the clients/
subdirectory and update all drivers. No functional changes.

Signed-off-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Reviewed-by: Jocelyn Falempe &lt;jfalempe@redhat.com&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20241108154600.126162-3-tzimmermann@suse.de
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Move the public header file drm_client_setup.h to the clients/
subdirectory and update all drivers. No functional changes.

Signed-off-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Reviewed-by: Jocelyn Falempe &lt;jfalempe@redhat.com&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20241108154600.126162-3-tzimmermann@suse.de
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/arm/komeda: Run DRM default client setup</title>
<updated>2024-09-26T06:27:54+00:00</updated>
<author>
<name>Thomas Zimmermann</name>
<email>tzimmermann@suse.de</email>
</author>
<published>2024-09-24T07:12:05+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=dd5891e7a4099eac2490794af232f9a683e43875'/>
<id>dd5891e7a4099eac2490794af232f9a683e43875</id>
<content type='text'>
Call drm_client_setup() to run the kernel's default client setup
for DRM. Set fbdev_probe in struct drm_driver, so that the client
setup can start the common fbdev client.

The komeda driver specifies a preferred color mode of 32. As this
is the default if no format has been given, leave it out entirely.

v5:
- select DRM_CLIENT_SELECTION

Signed-off-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Cc: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Acked-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-8-tzimmermann@suse.de
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Call drm_client_setup() to run the kernel's default client setup
for DRM. Set fbdev_probe in struct drm_driver, so that the client
setup can start the common fbdev client.

The komeda driver specifies a preferred color mode of 32. As this
is the default if no format has been given, leave it out entirely.

v5:
- select DRM_CLIENT_SELECTION

Signed-off-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
Cc: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Acked-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-8-tzimmermann@suse.de
</pre>
</div>
</content>
</entry>
<entry>
<title>drm: komeda: Fix an issue related to normalized zpos</title>
<updated>2024-08-30T12:44:12+00:00</updated>
<author>
<name>hongchi.peng</name>
<email>hongchi.peng@siengine.com</email>
</author>
<published>2024-08-26T02:45:17+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=258905cb9a6414be5c9ca4aa20ef855f8dc894d4'/>
<id>258905cb9a6414be5c9ca4aa20ef855f8dc894d4</id>
<content type='text'>
We use komeda_crtc_normalize_zpos to normalize zpos of affected planes
to their blending zorder in CU. If there's only one slave plane in
affected planes and its layer_split property is enabled, order++ for
its split layer, so that when calculating the normalized_zpos
of master planes, the split layer of the slave plane is included, but
the max_slave_zorder does not include the split layer and keep zero
because there's only one slave plane in affacted planes, although we
actually use two slave layers in this commit.

In most cases, this bug does not result in a commit failure, but assume
the following situation:
    slave_layer 0: zpos = 0, layer split enabled, normalized_zpos =
    0;(use slave_layer 2 as its split layer)
    master_layer 0: zpos = 2, layer_split enabled, normalized_zpos =
    2;(use master_layer 2 as its split layer)
    master_layer 1: zpos = 4, normalized_zpos = 4;
    master_layer 3: zpos = 5, normalized_zpos = 5;
    kcrtc_st-&gt;max_slave_zorder = 0;
When we use master_layer 3 as a input of CU in function
komeda_compiz_set_input and check it with function
komeda_component_check_input, the parameter idx is equal to
normailzed_zpos minus max_slave_zorder, the value of idx is 5
and is euqal to CU's max_active_inputs, so that
komeda_component_check_input returns a -EINVAL value.

To fix the bug described above, when calculating the max_slave_zorder
with the layer_split enabled, count the split layer in this calculation
directly.

Signed-off-by: hongchi.peng &lt;hongchi.peng@siengine.com&gt;
Acked-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Signed-off-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20240826024517.3739-1-hongchi.peng@siengine.com
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
We use komeda_crtc_normalize_zpos to normalize zpos of affected planes
to their blending zorder in CU. If there's only one slave plane in
affected planes and its layer_split property is enabled, order++ for
its split layer, so that when calculating the normalized_zpos
of master planes, the split layer of the slave plane is included, but
the max_slave_zorder does not include the split layer and keep zero
because there's only one slave plane in affacted planes, although we
actually use two slave layers in this commit.

In most cases, this bug does not result in a commit failure, but assume
the following situation:
    slave_layer 0: zpos = 0, layer split enabled, normalized_zpos =
    0;(use slave_layer 2 as its split layer)
    master_layer 0: zpos = 2, layer_split enabled, normalized_zpos =
    2;(use master_layer 2 as its split layer)
    master_layer 1: zpos = 4, normalized_zpos = 4;
    master_layer 3: zpos = 5, normalized_zpos = 5;
    kcrtc_st-&gt;max_slave_zorder = 0;
When we use master_layer 3 as a input of CU in function
komeda_compiz_set_input and check it with function
komeda_component_check_input, the parameter idx is equal to
normailzed_zpos minus max_slave_zorder, the value of idx is 5
and is euqal to CU's max_active_inputs, so that
komeda_component_check_input returns a -EINVAL value.

To fix the bug described above, when calculating the max_slave_zorder
with the layer_split enabled, count the split layer in this calculation
directly.

Signed-off-by: hongchi.peng &lt;hongchi.peng@siengine.com&gt;
Acked-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Signed-off-by: Liviu Dudau &lt;liviu.dudau@arm.com&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20240826024517.3739-1-hongchi.peng@siengine.com
</pre>
</div>
</content>
</entry>
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