drm/amd/display: Implement color management
Implement color management functionalities within amdgpu_dm_color, and expose functions within amdgpu_dm.h. Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>hifive-unleashed-5.1
Leo (Sunpeng) Li
Alex Deucher
parent
ec7e6bb814
commit
303afd2dbf
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@ -25,7 +25,7 @@
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AMDGPUDM = amdgpu_dm.o amdgpu_dm_irq.o amdgpu_dm_mst_types.o
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AMDGPUDM = amdgpu_dm.o amdgpu_dm_irq.o amdgpu_dm_mst_types.o amdgpu_dm_color.o
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ifneq ($(CONFIG_DRM_AMD_DC),)
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AMDGPUDM += amdgpu_dm_services.o amdgpu_dm_helpers.o
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@ -268,6 +268,11 @@ void amdgpu_dm_crtc_handle_crc_irq(struct drm_crtc *crtc);
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#define amdgpu_dm_crtc_handle_crc_irq(x)
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#endif
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int amdgpu_dm_set_degamma_lut(struct drm_crtc_state *crtc_state,
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struct dc_plane_state *dc_plane_state);
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void amdgpu_dm_set_ctm(struct dm_crtc_state *crtc);
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int amdgpu_dm_set_regamma_lut(struct dm_crtc_state *crtc);
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extern const struct drm_encoder_helper_funcs amdgpu_dm_encoder_helper_funcs;
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#endif /* __AMDGPU_DM_H__ */
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@ -0,0 +1,218 @@
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/*
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* Copyright 2018 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: AMD
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*
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*/
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#include "amdgpu_mode.h"
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#include "amdgpu_dm.h"
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#include "modules/color/color_gamma.h"
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#define MAX_LUT_ENTRIES 256
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/*
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* Return true if the given lut is a linear mapping of values, i.e. it acts
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* like a bypass LUT.
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*
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* It is considered linear if the lut represents:
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* f(a) = (0xFF00/MAX_LUT_ENTRIES-1)a; for integer a in [0, MAX_LUT_ENTRIES)
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*/
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static bool __is_lut_linear(struct drm_color_lut *lut)
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{
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int i;
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uint32_t max_os = 0xFF00;
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uint32_t expected;
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int delta;
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for (i = 0; i < MAX_LUT_ENTRIES; i++) {
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/* All color values should equal */
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if ((lut[i].red != lut[i].green) || (lut[i].green != lut[i].blue))
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return false;
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expected = i * max_os / (MAX_LUT_ENTRIES-1);
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/* Allow a +/-1 error. */
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delta = lut[i].red - expected;
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if (delta < -1 || 1 < delta)
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return false;
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}
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return true;
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}
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/**
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* amdgpu_dm_set_regamma_lut: Set regamma lut for the given CRTC.
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* @crtc: amdgpu_dm crtc state
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*
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* Update the underlying dc_stream_state's output transfer function (OTF) in
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* preparation for hardware commit. If no lut is specified by user, we default
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* to SRGB.
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*
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* RETURNS:
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* 0 on success, -ENOMEM if memory cannot be allocated to calculate the OTF.
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*/
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int amdgpu_dm_set_regamma_lut(struct dm_crtc_state *crtc)
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{
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struct drm_property_blob *blob = crtc->base.gamma_lut;
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struct dc_stream_state *stream = crtc->stream;
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struct drm_color_lut *lut;
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struct dc_gamma *gamma;
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enum dc_transfer_func_type old_type = stream->out_transfer_func->type;
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uint32_t r, g, b;
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int i;
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bool ret;
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if (!blob) {
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/* By default, use the SRGB predefined curve.*/
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stream->out_transfer_func->type = TF_TYPE_PREDEFINED;
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stream->out_transfer_func->tf = TRANSFER_FUNCTION_SRGB;
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return 0;
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}
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lut = (struct drm_color_lut *)blob->data;
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if (__is_lut_linear(lut)) {
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/* Set to bypass if lut is set to linear */
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stream->out_transfer_func->type = TF_TYPE_BYPASS;
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stream->out_transfer_func->tf = TRANSFER_FUNCTION_LINEAR;
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return 0;
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}
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gamma = dc_create_gamma();
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if (!gamma)
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return -ENOMEM;
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gamma->num_entries = MAX_LUT_ENTRIES;
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gamma->type = GAMMA_RGB_256;
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/* Truncate, and store in dc_gamma for output tf calculation */
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for (i = 0; i < gamma->num_entries; i++) {
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r = drm_color_lut_extract(lut[i].red, 16);
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g = drm_color_lut_extract(lut[i].green, 16);
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b = drm_color_lut_extract(lut[i].blue, 16);
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gamma->entries.red[i] = dal_fixed31_32_from_int(r);
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gamma->entries.green[i] = dal_fixed31_32_from_int(g);
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gamma->entries.blue[i] = dal_fixed31_32_from_int(b);
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}
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/* Call color module to translate into something DC understands. Namely
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* a transfer function.
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*/
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stream->out_transfer_func->type = TF_TYPE_DISTRIBUTED_POINTS;
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ret = mod_color_calculate_regamma_params(stream->out_transfer_func,
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gamma, true);
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dc_gamma_release(&gamma);
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if (!ret) {
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stream->out_transfer_func->type = old_type;
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DRM_ERROR("Out of memory when calculating regamma params\n");
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return -ENOMEM;
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}
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return 0;
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}
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/**
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* amdgpu_dm_set_ctm: Set the color transform matrix for the given CRTC.
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* @crtc: amdgpu_dm crtc state
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*
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* Update the underlying dc_stream_state's gamut remap matrix in preparation
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* for hardware commit. If no matrix is specified by user, gamut remap will be
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* disabled.
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*/
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void amdgpu_dm_set_ctm(struct dm_crtc_state *crtc)
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{
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struct drm_property_blob *blob = crtc->base.ctm;
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struct dc_stream_state *stream = crtc->stream;
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struct drm_color_ctm *ctm;
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int i;
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if (!blob) {
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stream->gamut_remap_matrix.enable_remap = false;
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return;
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}
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stream->gamut_remap_matrix.enable_remap = true;
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ctm = (struct drm_color_ctm *)blob->data;
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/*
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* DRM gives a 3x3 matrix, but DC wants 3x4. Assuming we're operating
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* with homogeneous coordinates, augment the matrix with 0's.
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*
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* The format provided is S31.32, which is the same as our fixed31_32.
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*/
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for (i = 0; i < 12; i++) {
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/* Skip 4th element */
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if (i % 4 == 3) {
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stream->gamut_remap_matrix.matrix[i] = dal_fixed31_32_zero;
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continue;
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}
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/* csc[i] = ctm[i - floor(i/4)] */
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stream->gamut_remap_matrix.matrix[i].value = ctm->matrix[i - (i/4)];
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}
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}
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/**
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* amdgpu_dm_set_degamma_lut: Set degamma lut for the given CRTC.
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* @crtc: amdgpu_dm crtc state
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*
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* Update the underlying dc_stream_state's input transfer function (ITF) in
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* preparation for hardware commit. If no lut is specified by user, we default
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* to SRGB degamma.
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*
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* Currently, we only support degamma bypass, or preprogrammed SRGB degamma.
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* Programmable degamma is not supported, and an attempt to do so will return
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* -EINVAL.
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*
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* RETURNS:
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* 0 on success, -EINVAL if custom degamma curve is given.
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*/
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int amdgpu_dm_set_degamma_lut(struct drm_crtc_state *crtc_state,
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struct dc_plane_state *dc_plane_state)
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{
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struct drm_property_blob *blob = crtc_state->degamma_lut;
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struct drm_color_lut *lut;
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if (!blob) {
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/* Default to SRGB */
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dc_plane_state->in_transfer_func->type = TF_TYPE_PREDEFINED;
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dc_plane_state->in_transfer_func->tf = TRANSFER_FUNCTION_SRGB;
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return 0;
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}
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lut = (struct drm_color_lut *)blob->data;
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if (__is_lut_linear(lut)) {
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dc_plane_state->in_transfer_func->type = TF_TYPE_BYPASS;
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dc_plane_state->in_transfer_func->tf = TRANSFER_FUNCTION_LINEAR;
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return 0;
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}
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/* Otherwise, assume SRGB, since programmable degamma is not
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* supported.
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*/
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dc_plane_state->in_transfer_func->type = TF_TYPE_PREDEFINED;
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dc_plane_state->in_transfer_func->tf = TRANSFER_FUNCTION_SRGB;
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return -EINVAL;
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}
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