The driver does support damage clips, but doesn't advertise it. So when running gnome/wayland on Matrox hardware, the full frame is copied to the slow Matrox memory, which leads to very poor performances.
Add drm_plane_enable_fb_damage_clips() to advertise this capability to userspace.
With this patch, gnome/wayland becomes usable on Matrox GPU.
Suggested-by: Jonas Ådahl jadahl@gmail.com Signed-off-by: Jocelyn Falempe jfalempe@redhat.com Reviewed-by: Lyude Paul lyude@redhat.com Reviewed-by: Thomas Zimmermann tzimmermann@suse.de --- drivers/gpu/drm/mgag200/mgag200_mode.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c index 6e18d3bbd720..cff2e76f3fa0 100644 --- a/drivers/gpu/drm/mgag200/mgag200_mode.c +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c @@ -1107,6 +1107,8 @@ int mgag200_modeset_init(struct mga_device *mdev) return ret; }
+ drm_plane_enable_fb_damage_clips(&pipe->plane); + /* FIXME: legacy gamma tables; convert to CRTC state */ drm_mode_crtc_set_gamma_size(&pipe->crtc, MGAG200_LUT_SIZE);