On 24/05/2023 01:14, Melissa Wen wrote:
This series is a refined version of our RFC [1] for AMD driver-specific color management properties. It is a collection of contributions from Joshua, Harry and I to enhance AMD KMS color pipeline for Steam Deck/SteamOS by exposing the large set of color caps available in AMD display HW. Considering RFC feedback, this patchset differs from the previous one by removing the KConfig option and just guarding driver-specific properties with `AMD_PRIVATE_COLOR` - but we also removed the guards from internal elements and operations. We stopped to advertise CRTC shaper and 3D LUTs properties since they aren't in use in the Steam Deck color pipeline[2]. On the other hand, we keep mapping CRTC shaper and 3D LUTs (DM) to DC MPC setup. We also improved curve calculations to take into account HW color caps. In short, for pre-blending, we added the following properties: - plane degamma LUT and predefined transfer function; - plane HDR multiplier - plane shaper LUT/transfer function; - plane 3D LUT; and finally, - plane blend LUT/transfer function, just before blending.
This set of properties sounds interesting and not fully AMD-specific. Could you please consider moving them to the more generic location?
For the reference, MSM (Qualcomm) display hardware supports degamma/gamma LUTs for planes too. One of the suggested usecases for these degamma/gamma units is to support colorspace transfer functions.
Thus, at least some of these properties can be implemented in drm/msm driver too.
After blending, we already have DRM CRTC degamma/gamma LUTs and CTM, therefore, we extend post-blending color pipeline with CRTC gamma transfer function. The first three patches are on DRM KMS side. We expose DRM property helper for blob lookup and replacement so that we can use it for managing driver-specific properties. We add a tracked for plane color mgmt changes and increase the maximum number of properties to accommodate this expansion. The userspace case here is Gamescope which is the compositor for SteamOS. It's already using all of this functionality to implement its color management pipeline right now [3]. Current IGT tests kms_color and amdgpu/amd_color on DCN301 and DCN21 HW preserve the same results with and without the guard. Finally, I may have missed something, please let me know if that's the case. Best Regards, Melissa Wen [1] https://lore.kernel.org/dri-devel/20230423141051.702990-1-mwen@xxxxxxxxxx [2] https://github.com/ValveSoftware/gamescope/blob/master/src/docs/Steam%20Deck%20Display%20Pipeline.png [3] https://github.com/ValveSoftware/gamescope Harry Wentland (2): drm/amd/display: fix segment distribution for linear LUTs drm/amd/display: fix the delta clamping for shaper LUT Joshua Ashton (13): drm/amd/display: add plane degamma TF driver-specific property drm/amd/display: add plane HDR multiplier driver-specific property drm/amd/display: add plane blend LUT and TF driver-specific properties drm/amd/display: copy 3D LUT settings from crtc state to stream_update drm/amd/display: dynamically acquire 3DLUT resources for color changes drm/amd/display: add CRTC regamma TF support drm/amd/display: set sdr_ref_white_level to 80 for out_transfer_func drm/amd/display: add support for plane degamma TF and LUT properties drm/amd/display: add dc_fixpt_from_s3132 helper drm/adm/display: add HDR multiplier support drm/amd/display: handle empty LUTs in __set_input_tf drm/amd/display: add DRM plane blend LUT and TF support drm/amd/display: allow newer DC hardware to use degamma ROM for PQ/HLG Melissa Wen (21): drm/drm_mode_object: increase max objects to accommodate new color props drm/drm_property: make replace_property_blob_from_id a DRM helper drm/drm_plane: track color mgmt changes per plane drm/amd/display: add CRTC driver-specific property for gamma TF drm/amd/display: add plane driver-specific properties for degamma LUT drm/amd/display: add plane 3D LUT driver-specific properties drm/amd/display: add plane shaper LUT driver-specific properties drm/amd/display: add plane shaper TF driver-private property drm/amd/display: add comments to describe DM crtc color mgmt behavior drm/amd/display: encapsulate atomic regamma operation drm/amd/display: update lut3d and shaper lut to stream drm/amd/display: allow BYPASS 3D LUT but keep shaper LUT settings drm/amd/display: handle MPC 3D LUT resources for a given context drm/amd/display: add CRTC 3D LUT support drm/amd/display: add CRTC shaper LUT support drm/amd/display: add CRTC shaper TF support drm/amd/display: mark plane as needing reset if plane color mgmt changes drm/amd/display: decouple steps for mapping CRTC degamma to DC plane drm/amd/display: reject atomic commit if setting both plane and CRTC degamma drm/amd/display: program DPP shaper and 3D LUT if updated drm/amd/display: add plane shaper/3D LUT and shaper TF support drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 125 ++++ drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 69 ++ .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 28 +- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 110 +++- .../amd/display/amdgpu_dm/amdgpu_dm_color.c | 612 ++++++++++++++++-- .../amd/display/amdgpu_dm/amdgpu_dm_crtc.c | 72 ++- .../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 213 +++++- drivers/gpu/drm/amd/display/dc/core/dc.c | 49 +- drivers/gpu/drm/amd/display/dc/dc.h | 8 + .../amd/display/dc/dcn10/dcn10_cm_common.c | 107 ++- .../drm/amd/display/dc/dcn20/dcn20_hwseq.c | 5 +- .../drm/amd/display/dc/dcn30/dcn30_hwseq.c | 9 +- .../amd/display/dc/dcn301/dcn301_resource.c | 26 +- .../gpu/drm/amd/display/include/fixed31_32.h | 12 + drivers/gpu/drm/arm/malidp_crtc.c | 2 +- drivers/gpu/drm/drm_atomic.c | 1 + drivers/gpu/drm/drm_atomic_state_helper.c | 1 + drivers/gpu/drm/drm_atomic_uapi.c | 43 +- drivers/gpu/drm/drm_property.c | 49 ++ include/drm/drm_mode_object.h | 2 +- include/drm/drm_plane.h | 7 + include/drm/drm_property.h | 6 + 22 files changed, 1416 insertions(+), 140 deletions(-)
-- With best wishes Dmitry
