diff options
| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2019-05-09 12:14:58 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-06-22 09:34:13 -0500 |
| commit | cf020d49b3c4ef6ab6f26be3dbf2f36b3df9f797 (patch) | |
| tree | 9b682c6b12aeab353f96e671c685bf7c9be2b8be /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | |
| parent | 043f5bb630c18edaaaad9c55ee60f8828e416ff4 (diff) | |
| download | lwn-cf020d49b3c4ef6ab6f26be3dbf2f36b3df9f797.tar.gz lwn-cf020d49b3c4ef6ab6f26be3dbf2f36b3df9f797.zip | |
drm/amd/display: Rework CRTC color management
[Why]
To prepare for the upcoming DRM plane color management properties
we need to correct a lot of wrong behavior and assumptions made for
CRTC color management.
The documentation added by this commit in amdgpu_dm_color explains
how the HW color pipeline works and its limitations with the DRM
interface.
The current implementation does the following wrong:
- Implicit sRGB DGM when no CRTC DGM is set
- Implicit sRGB RGM when no CRTC RGM is set
- No way to specify a non-linear DGM matrix that produces correct output
- No way to specify a correct RGM when a linear DGM is used
We had workarounds for passing kms_color tests but not all of the
behavior we had wrong was covered by these tests (especially when
it comes to non-linear DGM). Testing both DGM and RGM at the same time
isn't something kms_color tests well either.
[How]
The specifics for how color management works in AMDGPU and the new
behavior can be found by reading the documentation added to
amdgpu_dm_color.c from this patch.
All of the incorrect cases from the old implementation have been
addressed for the atomic interface, but there still a few TODOs for
the legacy one.
Note: this does cause regressions for kms_color@pipe-a-ctm-* over HDMI.
The result looks correct from visual inspection but the CRC no longer
matches. For reference, the test was previously doing the following:
linear degamma -> CTM -> sRGB regamma -> RGB to YUV (709) -> ...
Now the test is doing:
linear degamma -> CTM -> linear regamma -> RGB to YUV (709) -> ...
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Sun peng Li <Sunpeng.Li@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 07967497fb34..58d7bbc5ada7 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -2878,6 +2878,7 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev, struct drm_plane_state *plane_state, struct drm_crtc_state *crtc_state) { + struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(crtc_state); const struct amdgpu_framebuffer *amdgpu_fb = to_amdgpu_framebuffer(plane_state->fb); struct dc_scaling_info scaling_info; @@ -2922,13 +2923,11 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev, * Always set input transfer function, since plane state is refreshed * every time. */ - ret = amdgpu_dm_set_degamma_lut(crtc_state, dc_plane_state); - if (ret) { - dc_transfer_func_release(dc_plane_state->in_transfer_func); - dc_plane_state->in_transfer_func = NULL; - } + ret = amdgpu_dm_update_plane_color_mgmt(dm_crtc_state, dc_plane_state); + if (ret) + return ret; - return ret; + return 0; } static void update_stream_scaling_settings(const struct drm_display_mode *mode, @@ -3517,6 +3516,8 @@ dm_crtc_duplicate_state(struct drm_crtc *crtc) state->vrr_supported = cur->vrr_supported; state->freesync_config = cur->freesync_config; state->crc_enabled = cur->crc_enabled; + state->cm_has_degamma = cur->cm_has_degamma; + state->cm_is_degamma_srgb = cur->cm_is_degamma_srgb; /* TODO Duplicate dc_stream after objects are stream object is flattened */ @@ -5674,8 +5675,18 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state, bundle->stream_update.dst = acrtc_state->stream->dst; } - if (new_pcrtc_state->color_mgmt_changed) - bundle->stream_update.out_transfer_func = acrtc_state->stream->out_transfer_func; + if (new_pcrtc_state->color_mgmt_changed) { + /* + * TODO: This isn't fully correct since we've actually + * already modified the stream in place. + */ + bundle->stream_update.gamut_remap = + &acrtc_state->stream->gamut_remap_matrix; + bundle->stream_update.output_csc_transform = + &acrtc_state->stream->csc_color_matrix; + bundle->stream_update.out_transfer_func = + acrtc_state->stream->out_transfer_func; + } acrtc_state->stream->abm_level = acrtc_state->abm_level; if (acrtc_state->abm_level != dm_old_crtc_state->abm_level) @@ -6525,10 +6536,9 @@ skip_modeset: */ if (dm_new_crtc_state->base.color_mgmt_changed || drm_atomic_crtc_needs_modeset(new_crtc_state)) { - ret = amdgpu_dm_set_regamma_lut(dm_new_crtc_state); + ret = amdgpu_dm_update_crtc_color_mgmt(dm_new_crtc_state); if (ret) goto fail; - amdgpu_dm_set_ctm(dm_new_crtc_state); } /* Update Freesync settings. */ @@ -6831,6 +6841,8 @@ dm_determine_update_type_for_commit(struct amdgpu_display_manager *dm, new_dm_plane_state->dc_state->in_transfer_func; stream_update.gamut_remap = &new_dm_crtc_state->stream->gamut_remap_matrix; + stream_update.output_csc_transform = + &new_dm_crtc_state->stream->csc_color_matrix; stream_update.out_transfer_func = new_dm_crtc_state->stream->out_transfer_func; } |