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drm/amd/display: add CRTC gamma TF support

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Add predefined transfer function programming. There is no post-blending
out gamma ROM for hardcoded curves, but we can use AMD color modules to
program LUT parameters from pre-defined coefficients and an empty
regamma LUT (or bump up LUT parameters with pre-defined TF values).

v2:
- update crtc color mgmt if regamma TF differs between states (Joshua)
- map inverse EOTF to DC transfer function (Melissa)

v3:
- update AMDGPU TF list

v4:
- update comment regarding regamma behavior

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Joshua Ashton <joshua@froggi.es>
Co-developed-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Joshua Ashton
2023-11-16 18:57:55 -01:00
committed by Alex Deucher
parent 8b6b3f668f
commit 6bd20f0f16
2 changed files with 61 additions and 17 deletions
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1
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -9860,6 +9860,7 @@ skip_modeset:
* when a modeset is needed, to ensure it gets reprogrammed.
*/
if (dm_new_crtc_state->base.color_mgmt_changed ||
dm_old_crtc_state->regamma_tf != dm_new_crtc_state->regamma_tf ||
drm_atomic_crtc_needs_modeset(new_crtc_state)) {
ret = amdgpu_dm_update_crtc_color_mgmt(dm_new_crtc_state);
if (ret)