xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/virtio: fix unblank

Browse Source 
When going through a disable/enable cycle without changing the
framebuffer the optimization added by commit 3954ff10e0 ("drm/virtio:
skip set_scanout if framebuffer didn't change") causes the screen stay
blank.  Add a bool to force an update to fix that.

v2: use drm_atomic_crtc_needs_modeset() (Daniel).

Cc: 1882851@bugs.launchpad.net
Fixes: 3954ff10e0 ("drm/virtio: skip set_scanout if framebuffer didn't change")
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Jiri Slaby <jirislaby@kernel.org>
Tested-by: Diego Viola <diego.viola@gmail.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20200818072511.6745-2-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann
2020-08-18 09:25:10 +02:00
parent c08503ec03
commit 1bc371cd0e
3 changed files with 15 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/virtio/virtgpu_display.c
View File

@@ -123,6 +123,17 @@ static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
/*
* virtio-gpu can't do modeset and plane update operations
* independent from each other. So the actual modeset happens
* in the plane update callback, and here we just check
* whenever we must force the modeset.
*/
if (drm_atomic_crtc_needs_modeset(crtc->state)) {
output->needs_modeset = true;
}
}
static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {