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drm/amd/display: explicitly define EOTF and inverse EOTF

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Instead of relying on color block names to get the transfer function
intention regarding encoding pixel's luminance, define supported
Electro-Optical Transfer Functions (EOTFs) and inverse EOTFs, that
includes pure gamma or standardized transfer functions.

v3:
- squash linear and unity TFs to identity (Pekka)
- define the right TFs for BT.709 (Pekka and Harry)
- add comment about AMD TF coefficients

Suggested-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Melissa Wen
2023-11-16 18:57:46 -01:00
committed by Alex Deucher
parent d5a348d96e
commit 5a3b965b58
2 changed files with 71 additions and 23 deletions
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27
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
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@@ -724,16 +724,27 @@ struct amdgpu_dm_wb_connector {
extern const struct amdgpu_ip_block_version dm_ip_block;
/* enum amdgpu_transfer_function: pre-defined transfer function supported by AMD.
*
* It includes standardized transfer functions and pure power functions. The
* transfer function coefficients are available at modules/color/color_gamma.c
*/
enum amdgpu_transfer_function {
AMDGPU_TRANSFER_FUNCTION_DEFAULT,
AMDGPU_TRANSFER_FUNCTION_SRGB,
AMDGPU_TRANSFER_FUNCTION_BT709,
AMDGPU_TRANSFER_FUNCTION_PQ,
AMDGPU_TRANSFER_FUNCTION_LINEAR,
AMDGPU_TRANSFER_FUNCTION_UNITY,
AMDGPU_TRANSFER_FUNCTION_GAMMA22,
AMDGPU_TRANSFER_FUNCTION_GAMMA24,
AMDGPU_TRANSFER_FUNCTION_GAMMA26,
AMDGPU_TRANSFER_FUNCTION_SRGB_EOTF,
AMDGPU_TRANSFER_FUNCTION_BT709_INV_OETF,
AMDGPU_TRANSFER_FUNCTION_PQ_EOTF,
AMDGPU_TRANSFER_FUNCTION_IDENTITY,
AMDGPU_TRANSFER_FUNCTION_GAMMA22_EOTF,
AMDGPU_TRANSFER_FUNCTION_GAMMA24_EOTF,
AMDGPU_TRANSFER_FUNCTION_GAMMA26_EOTF,
AMDGPU_TRANSFER_FUNCTION_SRGB_INV_EOTF,
AMDGPU_TRANSFER_FUNCTION_BT709_OETF,
AMDGPU_TRANSFER_FUNCTION_PQ_INV_EOTF,
AMDGPU_TRANSFER_FUNCTION_GAMMA22_INV_EOTF,
AMDGPU_TRANSFER_FUNCTION_GAMMA24_INV_EOTF,
AMDGPU_TRANSFER_FUNCTION_GAMMA26_INV_EOTF,
AMDGPU_TRANSFER_FUNCTION_COUNT
};
struct dm_plane_state {