drm_hwcomposer: Add support for color transform matrix
1. Add and wire-up CRTC CTM property support.
2. Add custom Android property to select behavior for cases
where DRM can't handle color transform matrix.
The "vendor.hwc.drm.ctm" property can be set to:
- DRM_OR_GPU (default) - Use GPU if CTM is not supported by DRM.
- DRM_OR_IGNORE - Ignore CTM if DRM doesn't support it.
The last option is useful for Android 13 and later where default
color transformation matrix is not an identity matrix.
At the moment I do not have any devices with CTM support, therefore
I can test only DRM_OR_IGNORE option.
Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
diff --git a/backend/Backend.cpp b/backend/Backend.cpp
index 679f083..f3156ed 100644
--- a/backend/Backend.cpp
+++ b/backend/Backend.cpp
@@ -83,8 +83,7 @@
bool Backend::IsClientLayer(HwcDisplay *display, HwcLayer *layer) {
return !HardwareSupportsLayerType(layer->GetSfType()) ||
- !layer->IsLayerUsableAsDevice() ||
- display->color_transform_hint() != HAL_COLOR_TRANSFORM_IDENTITY ||
+ !layer->IsLayerUsableAsDevice() || display->CtmByGpu() ||
(layer->GetLayerData().pi.RequireScalingOrPhasing() &&
display->GetHwc2()->GetResMan().ForcedScalingWithGpu());
}