Mesa Lands Fixes For HDR With Vulkan Drivers
Merged overnight to Mesa 26.0-devel and likely to be back-ported for the upcoming Mesa 25.3 release are a few fixes around high dynamic range (HDR) support within the common Vulkan windowing system integration (WSI) / display code.
Mario Kleiner sent out what he says are three important bug fixes to the HDR support for Mesa's Vulkan drivers with the WSI/display back-end. These fixes, which were tested with the AMD RADV driver, include:
These Mesa Vulkan HDR fixes are now merged for Mesa 26.0 Git users and in time to the Mesa 25.3 series.
Mario Kleiner sent out what he says are three important bug fixes to the HDR support for Mesa's Vulkan drivers with the WSI/display back-end. These fixes, which were tested with the AMD RADV driver, include:
- Enable HDR even if a Vulkan client app doesn't call vkSetHdrMetadataEXT(), but just selects a HDR colorspace for the swapchain.
- Accept HdrMetadata with luminance levels of 0 nits - Standard says these are valid and mean "undefined/unknown" for the video sink.
- Restore SDR mode again when the swapchain gets destroyed - At least some drivers, e.g., amdgpu, need a full atomic modeset for switching between SDR and HDR modes.
These Mesa Vulkan HDR fixes are now merged for Mesa 26.0 Git users and in time to the Mesa 25.3 series.