This patchset enables the DP and HDMI infoframe properties in amdgpu. The first two patches are not completely related to the rest. The first patch allows for HDR_OUTPUT_METADATA with EOTFs that are unknown in the kernel.
The second one prints a connector's max_bpc as part of the atomic state debugfs print. The following patches rework the connector colorspace code to 1) allow for easy printing of the colorspace in the drm_atomic state debugfs, and 2) allow drivers to specify the supported colorspaces on a connector. The rest of the patches deal with the Colorspace enablement in amdgpu. Why do drivers need to specify supported colorspaces? The amdgpu driver needs support for RGB-to-YCbCr conversion when we drive the display in YCbCr. This is currently not implemented for all colorspaces. Since the Colorspace property didn't have an IGT test I added one to kms_hdr. The relevant patchset can be found on the IGT mailing list or on https://gitlab.freedesktop.org/hwentland/igt-gpu-tools/-/tree/hdr-colorimetry We tested v1 of the patchset and confirmed that the infoframes are as expected for both DP and HDMI when running the IGT colorimetry tests. Open Items ---------- A couple comments from Pekka about colorspace documentation are left unaddressed. I hope they won't block merging this set but should still be addressed separately. Pekka's questions really got me thinking of how this colorspace property should be used and working with it more closely with Joshua who is enabling HDR in gamescope made me wonder even more. Uma, is there a (canonical, upstream) userspace that uses this property that I can look at to understand more? One of the key challenges that is currently not addressed is that userspace is expected to pick a colorspace format straight from the list of definitions out of the DP or HDMI spec. But the kernel driver are the ones deciding on the output encoding (RGB, YCBCR444, YCBCR420, etc.). So there is no way for userspace to decide correctly between, for example, BT2020_RGB, BT2020_CYCC, BT2020_YCC. So we end up in a scenario where gamescope sets BT2020_RGB but we output YCBCR444 so have to correct the colorspace value to BT2020_YCC. This in turn breaks the colorspace IGT tests I wrote. I don't think "fixing" the IGT tests to accept this is the right thing to do. The way it stands this patchset allows us to specify the output colorspace on amdgpu and we try to do the right thing, but I don't thing the way the colorspace property is defined is right. We're trying to expose things to userspace that should be under driver control. A much better approach would be to give userspace options for colorspace that are not tied to DP or HDMI specs, i.e., sRGB, BT709, BT2020, etc., and have the driver do the right thing to fill the infoframe, e.g., by picking BT2020_YCC if the requested colorspace is BT2020 and the is YCBCR444. If no upstream userspace currently makes use of this property I can make that change, i.e., no longer tie the colorspace property directly to the infoframe and reduce the options to sRGB, BT709, BT601, and BT2020 (and possibly opRGB). v2: - Tested with DP and HDMI analyzers - Confirmed driver will fallback to lower bpc when needed - Dropped hunk to set HDMI AVI infoframe as it was a no-op - Fixed BT.2020 YCbCr colorimetry (JoshuaAshton) - Simplify initialization of supported colorspaces (Jani) - Fix kerneldoc (kernel test robot) Cc: Pekka Paalanen <ppaala...@gmail.com> Cc: Sebastian Wick <sebastian.w...@redhat.com> Cc: vitaly.pros...@amd.com Cc: Uma Shankar <uma.shan...@intel.com> Cc: Ville Syrjälä <ville.syrj...@linux.intel.com> Cc: Joshua Ashton <jos...@froggi.es> Cc: Jani Nikula <jani.nik...@linux.intel.com> Cc: Michel Dänzer <michel.daen...@mailbox.org> Cc: dri-devel@lists.freedesktop.org Cc: amd-...@lists.freedesktop.org Harry Wentland (16): drm/display: Don't block HDR_OUTPUT_METADATA on unknown EOTF drm/connector: print max_requested_bpc in state debugfs drm/connector: Drop COLORIMETRY_NO_DATA drm/connector: Convert DRM_MODE_COLORIMETRY to enum drm/connector: Pull out common create_colorspace_property code drm/connector: Allow drivers to pass list of supported colorspaces drm/connector: Print connector colorspace in state debugfs drm/amd/display: Always pass connector_state to stream validation drm/amd/display: Register Colorspace property for DP and HDMI drm/amd/display: Signal mode_changed if colorspace changed drm/amd/display: Send correct DP colorspace infopacket drm/amd/display: Add support for explicit BT601_YCC drm/amd/display: Add debugfs for testing output colorspace drm/amd/display: Add default case for output_color_space switch drm/amd/display: Don't restrict bpc to 8 bpc drm/amd/display: Format input and output CSC matrix Joshua Ashton (5): drm/amd/display: Always set crtcinfo from create_stream_for_sink drm/amd/display: Fallback to 2020_YCBCR if the pixel encoding is not RGB drm/amd/display: Refactor avi_info_frame colorimetry determination drm/amd/display: Calculate output_color_space after pixel encoding adjustment drm/amd/display: Fix COLOR_SPACE_YCBCR2020_TYPE matrix .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 90 ++++++--- .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 57 ++++++ .../drm/amd/display/dc/core/dc_hw_sequencer.c | 38 ++-- .../gpu/drm/amd/display/dc/core/dc_resource.c | 28 ++- drivers/gpu/drm/amd/display/dc/inc/hw/dpp.h | 54 +++-- drivers/gpu/drm/display/drm_hdmi_helper.c | 8 +- drivers/gpu/drm/drm_atomic.c | 2 + drivers/gpu/drm/drm_connector.c | 189 ++++++++++-------- .../gpu/drm/i915/display/intel_connector.c | 4 +- drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +- include/drm/display/drm_dp.h | 2 +- include/drm/drm_connector.h | 57 +++--- 12 files changed, 345 insertions(+), 186 deletions(-) -- 2.39.0
