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disp: msm: sde: fix to avoid creating hw-fences for empty spec fences

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Current display driver sets the hw-fences as valid even when
the speculative fence is empty. Avoid this issue by doing a
positive check and only create hw-fences if all the fences in
the speculative fence are valid.

Change-Id: Iec9636641ac9146eb651be08615e2478994c2508
Signed-off-by: Ingrid Gallardo <quic_ingridg@quicinc.com>
This commit is contained in:
Ingrid Gallardo
2022-10-21 19:44:00 -07:00
committed by Gerrit - the friendly Code Review server
parent 275c881ae4
commit 188cfbc717
1 changed files with 14 additions and 4 deletions
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18
msm/sde/sde_crtc.c
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@@ -3725,7 +3725,6 @@ static struct dma_fence *_sde_plane_get_input_hw_fence(struct drm_plane *plane)
struct dma_fence *input_hw_fence = NULL;
struct dma_fence_array *array = NULL;
struct dma_fence *spec_fence = NULL;
bool spec_hw_fence = true;
int i;
if (!plane || !plane->state) {
@@ -3741,6 +3740,8 @@ static struct dma_fence *_sde_plane_get_input_hw_fence(struct drm_plane *plane)
fence = (struct dma_fence *)pstate->input_fence;
if (test_bit(SPEC_FENCE_FLAG_FENCE_ARRAY, &fence->flags)) {
bool spec_hw_fence = false;
array = container_of(fence, struct dma_fence_array, base);
if (IS_ERR_OR_NULL(array))
goto exit;
@@ -3751,9 +3752,18 @@ static struct dma_fence *_sde_plane_get_input_hw_fence(struct drm_plane *plane)
for (i = 0; i < array->num_fences; i++) {
spec_fence = array->fences[i];
if (IS_ERR_OR_NULL(spec_fence) ||
!(test_bit(MSM_HW_FENCE_FLAG_ENABLED_BIT,
&spec_fence->flags))) {
if (!IS_ERR_OR_NULL(spec_fence) &&
test_bit(MSM_HW_FENCE_FLAG_ENABLED_BIT,
&spec_fence->flags)) {
spec_hw_fence = true;
} else {
/*
* all child-fences of the spec fence must be hw-fences for
* this fence to be considered hw-fence. Otherwise just
* fail here to set the hw-fences and driver will use
* sw-fences instead.
*/
spec_hw_fence = false;
break;
}