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Message-ID: <20231123221315.3579454-3-javierm@redhat.com>
Date: Thu, 23 Nov 2023 23:13:01 +0100
From: Javier Martinez Canillas <javierm@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Maxime Ripard <mripard@...nel.org>, Zack Rusin <zackr@...are.com>,
Thomas Zimmermann <tzimmermann@...e.de>,
Pekka Paalanen <pekka.paalanen@...labora.com>,
Bilal Elmoussaoui <belmouss@...hat.com>,
Simon Ser <contact@...rsion.fr>,
Erico Nunes <nunes.erico@...il.com>,
Sima Vetter <daniel.vetter@...ll.ch>,
Javier Martinez Canillas <javierm@...hat.com>,
stable@...r.kernel.org,
nerdopolis <bluescreen_avenger@...izon.net>,
Chia-I Wu <olvaffe@...il.com>, Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...hat.com>,
Gerd Hoffmann <kraxel@...hat.com>,
Gurchetan Singh <gurchetansingh@...omium.org>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
dri-devel@...ts.freedesktop.org, virtualization@...ts.linux.dev
Subject: [PATCH v4 2/5] drm/virtio: Disable damage clipping if FB changed since last page-flip
The driver does per-buffer uploads and needs to force a full plane update
if the plane's attached framebuffer has change since the last page-flip.
Fixes: 01f05940a9a7 ("drm/virtio: Enable fb damage clips property for the primary plane")
Cc: <stable@...r.kernel.org> # v6.4+
Reported-by: nerdopolis <bluescreen_avenger@...izon.net>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218115
Suggested-by: Sima Vetter <daniel.vetter@...ll.ch>
Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>
Reviewed-by: Zack Rusin <zackr@...are.com>
Acked-by: Sima Vetter <daniel.vetter@...ll.ch>
---
(no changes since v2)
Changes in v2:
- Set struct drm_plane_state .ignore_damage_clips in virtio-gpu plane's
.atomic_check instead of using a different helpers (Thomas Zimmermann).
drivers/gpu/drm/virtio/virtgpu_plane.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c
index a2e045f3a000..a1ef657eba07 100644
--- a/drivers/gpu/drm/virtio/virtgpu_plane.c
+++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
@@ -79,6 +79,8 @@ static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
{
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
plane);
+ struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state,
+ plane);
bool is_cursor = plane->type == DRM_PLANE_TYPE_CURSOR;
struct drm_crtc_state *crtc_state;
int ret;
@@ -86,6 +88,14 @@ static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
if (!new_plane_state->fb || WARN_ON(!new_plane_state->crtc))
return 0;
+ /*
+ * Ignore damage clips if the framebuffer attached to the plane's state
+ * has changed since the last plane update (page-flip). In this case, a
+ * full plane update should happen because uploads are done per-buffer.
+ */
+ if (old_plane_state->fb != new_plane_state->fb)
+ new_plane_state->ignore_damage_clips = true;
+
crtc_state = drm_atomic_get_crtc_state(state,
new_plane_state->crtc);
if (IS_ERR(crtc_state))
--
2.41.0
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