NACK/Cmnt: ACK/Cmnt: [SRU][resolute][PATCH 0/1] drm/xe/display: allow external dma-buf framebuffers

[Edoardo Canepa]

Rejected for the following reasons:

There's a v3 patch already.

On 6/30/26 10:01, Hui Wang via kernel-team wrote:
> Please copy the SRU template to the tracking bug, and create linux 
> (resolute) target in the tracking bug.
>
> Acked-by: Hui Wang <hui.wang at canonical.com>
>
> On 6/30/26 12:49, ChunAn Wu via kernel-team wrote:
>> BugLink: https://bugs.launchpad.net/bugs/2158605
>>
>> [Impact]
>> Screen garbage can show when running glxgears fullscreen on affected
>> Intel graphics systems.
>>
>> The Launchpad report says it happens about 1 in 3 runs.
>>
>> [Fix]
>> Skip the SCANOUT flag and VM_BIND checks for external dma-buf imports
>> in the xe display framebuffer setup and pin paths.
>>
>> For imported sg buffers, CPU caching is controlled by the exporter.
>> The patch keeps the existing checks for local buffers.
>>
>> This patch is from upstream Patchwork, not yet merged:
>> https://patchwork.freedesktop.org/patch/732636/
>>
>> [Test Plan]
>> Run the fullscreen glxgears test 10 times:
>> $ glxgears -fullscreen
>>
>> Or run the matching checkbox test for the affected GPU:
>> $ checkbox-cli run 
>> graphics/2_valid_glxgears_fullscreen_PCI_ID_<affected-gpu>
>>
>> Without patch: screen shows garbage during the fullscreen glxgears test.
>> With patch: fullscreen glxgears completes without screen garbage.
>>
>> [Where problems could occur]
>> Could break external dma-buf framebuffer setup in the xe display driver.
>>
>> If the sg-buffer exception is wrong, imported framebuffers could be
>> accepted when they should be rejected. This could show as display
>> corruption, failed framebuffer creation, or xe framebuffer pinning
>> warnings.
>>
>> [Other Info]
>> SRU target: linux-oem-6.17.
>> The patch is not in an upstream kernel release yet.
>>
>> Matthew Auld (1):
>>    UBUNTU: SAUCE: drm/xe/display: skip FORCE_WC and vm_bound check 
>> for external dma-bufs
>>
>>   drivers/gpu/drm/xe/display/intel_fb_bo.c | 3 ++-
>>   drivers/gpu/drm/xe/display/xe_fb_pin.c   | 3 ++-
>>   2 files changed, 4 insertions(+), 2 deletions(-)
>>
>
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