[PATCH v2 00/34] drm/amd/display: add AMD driver-specific properties for color mgmt
From: Melissa Wen
Date: Thu Aug 10 2023 - 12:04:41 EST
Hi all,
Here is the next version of our work to enable AMD driver-specific color
management properties [1][2]. This series is a collection of
contributions from Joshua, Harry, and me to enhance the AMD KMS color
pipeline for Steam Deck/SteamOS by exposing additional pre-blending and
post-blending color capabilities from those available in the current DRM
KMS API[3].
The userspace case here is Gamescope which is the compositor for
SteamOS. Gamescope is already using these features to implement its
color management pipeline [4].
In this version, I try to address all concerns shared in the previous
one, i.e.:
- Replace DRM_ by AMDGPU_ prefix for transfer function enumeration;
- Explicitly define EOTFs and inverse EOTFs and set props accordingly;
- Document pre-defined transfer functions;
- Remove misleading comments;
- Remove post-blending/MPC shaper and 3D LUT support;
- Move driver-specific property operations from amdgpu_display.c to
amdgpu_dm_color.c;
- Reset planes if any color props change;
- Nits/small fixes;
Bearing in mind the complexity of color concepts, I believe there is a
high chance of some misunderstanding from my side when defining EOTFs
and documenting pre-defined TFs. So, reviews are very important and
welcome (thanks in advance). FWIW, I added Harry as a co-developer of
this TF documentation since I based on his description of EOTF/inv_EOTF
and previous documentation work [5]. Let me know if there is a better
way for credits.
Two DC patches were already applied and, therefore, removed from the
series. I added r-b according to previous feedback. We also add plane
CTM to driver-specific properties. As a result, this is the updated list
of all driver-specific color properties exposed by this series:
- plane degamma LUT and pre-defined TF;
- plane HDR multiplier;
- plane CTM 3x4;
- plane shaper LUT and pre-defined TF;
- plane 3D LUT;
- plane blend LUT and pre-defined TF;
- CRTC gamma pre-defined TF;
Remember you can find the AMD HW color capabilities documented here:
https://dri.freedesktop.org/docs/drm/gpu/amdgpu/display/display-manager.html#color-management-properties
Worth mentioning that the pre-blending degamma block can use ROM curves
for some pre-defined TFs, but the other blocks use the AMD color module
to calculate this curve considering pre-defined coefficients.
We need changes on DC gamut remap matrix to support the plane and CRTC
CTM on drivers that support both. I've sent a previous patch to apply
these changes to all DCN3+ families [6]. Here I use the same changes but
limited to DCN301. Just let me know if you prefer the previous/expanded
version.
Finally, this is the Linux/AMD color management API before and after
blending with the driver-specific properties:
+----------------------+
| PLANE |
| |
| +----------------+ |
| | AMD Degamma | |
| | | |
| | EOTF | 1D LUT | |
| +--------+-------+ |
| | |
| +--------v-------+ |
| | AMD HDR | |
| | Multiply | |
| +--------+-------+ |
| | |
| +--------v-------+ |
| | AMD CTM (3x4) | |
| +--------+-------+ |
| | |
| +--------v-------+ |
| | AMD Shaper | |
| | | |
| | inv_EOTF | | |
| | Custom 1D LUT | |
| +--------+-------+ |
| | |
| +--------v-------+ |
| | AMD 3D LUT | |
| | 17^3/12-bit | |
| +--------+-------+ |
| | |
| +--------v-------+ |
| | AMD Blend | |
| | | |
| | EOTF | 1D LUT | |
| +--------+-------+ |
| | |
++----------v---------++
|| Blending ||
++----------+---------++
| CRTC | |
| | |
| +-------v-------+ |
| | DRM Degamma | |
| | | |
| | Custom 1D LUT | |
| +-------+-------+ |
| | |
| +-------v-------+ |
| | DRM CTM (3x3) | |
| +-------+-------+ |
| | |
| +-------v-------+ |
| | DRM Gamma | |
| | | |
| | Custom 1D LUT | |
| +---------------+ |
| | *AMD Gamma | |
| | inv_EOTF | |
| +---------------+ |
| |
+----------------------+
Let me know your thoughts.
Best Regards,
Melissa Wen
[1] https://lore.kernel.org/dri-devel/20230423141051.702990-1-mwen@xxxxxxxxxx
[2] https://lore.kernel.org/dri-devel/20230523221520.3115570-1-mwen@xxxxxxxxxx
[3] https://github.com/ValveSoftware/gamescope/blob/master/src/docs/Steam%20Deck%20Display%20Pipeline.png
[4] https://github.com/ValveSoftware/gamescope
[5] https://lore.kernel.org/dri-devel/20210730204134.21769-1-harry.wentland@xxxxxxx
[6] https://lore.kernel.org/dri-devel/20230721132431.692158-1-mwen@xxxxxxxxxx
Harry Wentland (1):
drm/amd/display: fix segment distribution for linear LUTs
Joshua Ashton (14):
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: add CRTC gamma TF support
drm/amd/display: set sdr_ref_white_level to 80 for out_transfer_func
drm/amd/display: mark plane as needing reset if color props change
drm/amd/display: add plane degamma TF and LUT support
drm/amd/display: add dc_fixpt_from_s3132 helper
drm/amd/display: add HDR multiplier support
drm/amd/display: handle empty LUTs in __set_input_tf
drm/amd/display: add plane blend LUT and TF support
drm/amd/display: allow newer DC hardware to use degamma ROM for PQ/HLG
drm/amd/display: copy 3D LUT settings from crtc state to stream_update
drm/amd/display: Use 3x4 CTM for plane CTM
Melissa Wen (19):
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 driver-specific property for plane degamma LUT
drm/amd/display: explicitly define EOTF and inverse EOTF
drm/amd/display: document AMDGPU pre-defined transfer functions
drm/amd/display: add plane 3D LUT driver-specific properties
drm/amd/display: add plane shaper LUT and TF driver-specific
properties
drm/amd/display: add CRTC gamma TF driver-specific property
drm/amd/display: add comments to describe DM crtc color mgmt behavior
drm/amd/display: encapsulate atomic regamma operation
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: add plane shaper LUT support
drm/amd/display: add plane shaper TF support
drm/amd/display: add plane 3D LUT support
drm/amd/display: set stream gamut remap matrix to MPC for DCN301
drm/amd/display: add plane CTM driver-specific property
drm/amd/display: add plane CTM support
drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 71 ++
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 34 +-
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 101 +++
.../amd/display/amdgpu_dm/amdgpu_dm_color.c | 805 ++++++++++++++++--
.../amd/display/amdgpu_dm/amdgpu_dm_crtc.c | 72 ++
.../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 224 ++++-
.../amd/display/dc/dcn10/dcn10_cm_common.c | 93 +-
.../drm/amd/display/dc/dcn30/dcn30_hwseq.c | 37 +
.../drm/amd/display/dc/dcn30/dcn30_hwseq.h | 3 +
.../drm/amd/display/dc/dcn301/dcn301_init.c | 2 +-
.../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 +
include/uapi/drm/drm_mode.h | 8 +
20 files changed, 1446 insertions(+), 127 deletions(-)
--
2.40.1