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drm/vc4: Drop planes that have 0 destination size

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There is no point in trying to create a dlist entry for planes
that have a 0 crtc size, and it can also cause grief in the vc6
dlist generation as it takes width-1 and height-1, causing wrap
around.
Drop these planes.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2024-02-06 17:52:49 +00:00
committed by Dom Cobley
parent 5f391cd6c9
commit dac616899f
1 changed files with 7 additions and 4 deletions
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11
drivers/gpu/drm/vc4/vc4_plane.c
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@@ -1114,7 +1114,7 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
width = vc4_state->src_w[0] >> 16;
height = vc4_state->src_h[0] >> 16;
if (!width || !height) {
if (!width || !height || !vc4_state->crtc_w || !vc4_state->crtc_h) {
/* 0 source size probably means the plane is offscreen */
vc4_state->dlist_initialized = 1;
return 0;
@@ -1641,8 +1641,10 @@ static int vc6_plane_mode_set(struct drm_plane *plane,
width = vc4_state->src_w[0] >> 16;
height = vc4_state->src_h[0] >> 16;
if (!width || !height) {
/* 0 source size probably means the plane is offscreen */
if (!width || !height || !vc4_state->crtc_w || !vc4_state->crtc_h) {
/* 0 source size probably means the plane is offscreen.
* 0 destination size is a redundant plane.
*/
vc4_state->dlist_initialized = 1;
return 0;
}
@@ -2018,7 +2020,8 @@ int vc4_plane_atomic_check(struct drm_plane *plane,
if (ret)
return ret;
if (!vc4_state->src_w[0] || !vc4_state->src_h[0])
if (!vc4_state->src_w[0] || !vc4_state->src_h[0] ||
!vc4_state->crtc_w || !vc4_state->crtc_h)
return 0;
ret = vc4_plane_allocate_lbm(new_plane_state);