[PATCH] drm/virtio: Support drm_panic with non-vmapped shmem BO

[Dmitry Osipenko]

On 4/16/25 10:05, Thomas Zimmermann wrote:
> Hi
> 
> Am 12.04.25 um 15:20 schrieb Ryosuke Yasuoka:
>> Pass array of pages of the scanout buffer [1] to shmem BO, allowing
>> drm_panic to work even if the BO is not vmapped.
>>
>> [1] https://lore.kernel.org/all/20250407140138.162383-3-
>> jfalempe at redhat.com/
>>
>> Signed-off-by: Jocelyn Falempe <jfalempe at redhat.com>
>> Signed-off-by: Ryosuke Yasuoka <ryasuoka at redhat.com>
>> ---
>>   drivers/gpu/drm/virtio/virtgpu_plane.c | 14 +++++++++++---
>>   1 file changed, 11 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/
>> virtio/virtgpu_plane.c
>> index a6f5a78f436a..2ff57d559c86 100644
>> --- a/drivers/gpu/drm/virtio/virtgpu_plane.c
>> +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
>> @@ -500,11 +500,19 @@ static int virtio_drm_get_scanout_buffer(struct
>> drm_plane *plane,
>>         bo = gem_to_virtio_gpu_obj(plane->state->fb->obj[0]);
>>   -    /* Only support mapped shmem bo */
>> -    if (virtio_gpu_is_vram(bo) || bo->base.base.import_attach || !bo-
>> >base.vaddr)
>> +    if (virtio_gpu_is_vram(bo) || bo->base.base.import_attach)
> 
> Please adopt drm_gem_is_imported() instead of testing import_attach
> directly. The helper is available in v6.15-rc1 and later.

Hi, I rebased this patch locally on top of your drm_gem_is_imported()
changes and will merge it all soon.

-- 
Best regards,
Dmitry