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Add plane selection workaround for Spacemit driver bug

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Expose plane bug workaround logic through new envvars:
- DRM_MIN_PLANE_ZPOS
- DRM_ALLOW_PRIMARY_PLANE
This commit is contained in:
Cameron Gutman 2024-07-12 19:37:56 -05:00
parent 52583f5c71
commit 45ccd1a811
1 changed files with 14 additions and 4 deletions
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18
app/streaming/video/ffmpeg-renderers/drm.cpp
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@ -449,7 +449,7 @@ bool DrmRenderer::initialize(PDECODER_PARAMETERS params)
// Find the active plane (if any) on this CRTC with the highest zpos.
// We'll need to use a plane with a equal or greater zpos to be visible.
uint64_t maxActiveZpos = 0;
uint64_t maxActiveZpos = qEnvironmentVariableIntValue("DRM_MIN_PLANE_ZPOS");
for (uint32_t i = 0; i < planeRes->count_planes; i++) {
drmModePlane* plane = drmModeGetPlane(m_DrmFd, planeRes->planes[i]);
if (plane != nullptr) {
@ -461,7 +461,7 @@ bool DrmRenderer::initialize(PDECODER_PARAMETERS params)
drmModeObjectPropertiesPtr props = drmModeObjectGetProperties(m_DrmFd, planeRes->planes[i], DRM_MODE_OBJECT_PLANE);
if (props != nullptr) {
// Only consider primary and overlay planes as valid render targets
// Don't consider cursor planes when searching for the highest active zpos
uint64_t type;
if (getPropertyByName(props, "type", &type) && (type == DRM_PLANE_TYPE_PRIMARY || type == DRM_PLANE_TYPE_OVERLAY)) {
uint64_t zPos;
@ -478,6 +478,15 @@ bool DrmRenderer::initialize(PDECODER_PARAMETERS params)
}
}
// The Spacemit K1 driver is broken and advertises support for NV12/P010
// formats with the linear modifier on all planes, but doesn't actually
// support raw YUV formats on the primary plane. Don't ever use primary
// planes on Spacemit hardware to avoid triggering this bug.
bool ok, allowPrimaryPlane = !!qEnvironmentVariableIntValue("DRM_ALLOW_PRIMARY_PLANE", &ok);
if (!ok) {
allowPrimaryPlane = strcmp(m_Version->name, "spacemit") != 0;
}
// Find a plane with the required format to render on
//
// FIXME: We should check the actual DRM format in a real AVFrame rather
@ -528,8 +537,9 @@ bool DrmRenderer::initialize(PDECODER_PARAMETERS params)
uint64_t type;
uint64_t zPos;
// Only consider primary and overlay planes as valid render targets
if (!getPropertyByName(props, "type", &type) || (type != DRM_PLANE_TYPE_PRIMARY && type != DRM_PLANE_TYPE_OVERLAY)) {
// Only consider overlay and primary (if allowed) planes as valid render targets
if (!getPropertyByName(props, "type", &type) ||
(type != DRM_PLANE_TYPE_OVERLAY && (type != DRM_PLANE_TYPE_PRIMARY || !allowPrimaryPlane))) {
drmModeFreePlane(plane);
}
// If this plane has a zpos property and it's lower (further from user) than