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From 67446612703a9b4b2910760c7b1f288991718255 Mon Sep 17 00:00:00 2001
From: hersen wu <hersenxs.wu@amd.com>
Date: Fri, 1 Mar 2019 11:54:02 -0500
Subject: [PATCH 1695/2940] drm/amd/display: program default output gamma
program default output gamma if no user specific gamma
parameters passed.
Change-Id: I909e6d145f8bdc49c405e8ca80839818a7c5d152
Signed-off-by: hersen wu <hersenxs.wu@amd.com>
Reviewed-by: Sun peng Li <Sunpeng.Li@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
---
.../amd/display/amdgpu_dm/amdgpu_dm_color.c | 53 ++++++++++---------
1 file changed, 29 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
index 216e48cec716..7258c992a2bf 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
@@ -126,46 +126,51 @@ int amdgpu_dm_set_regamma_lut(struct dm_crtc_state *crtc)
crtc->base.state->dev->dev_private;
struct drm_color_lut *lut;
uint32_t lut_size;
- struct dc_gamma *gamma;
+ struct dc_gamma *gamma = NULL;
enum dc_transfer_func_type old_type = stream->out_transfer_func->type;
bool ret;
- if (!blob) {
+ if (!blob && adev->asic_type <= CHIP_RAVEN) {
/* By default, use the SRGB predefined curve.*/
stream->out_transfer_func->type = TF_TYPE_PREDEFINED;
stream->out_transfer_func->tf = TRANSFER_FUNCTION_SRGB;
return 0;
}
- lut = (struct drm_color_lut *)blob->data;
- lut_size = blob->length / sizeof(struct drm_color_lut);
-
- gamma = dc_create_gamma();
- if (!gamma)
- return -ENOMEM;
+ if (blob) {
+ lut = (struct drm_color_lut *)blob->data;
+ lut_size = blob->length / sizeof(struct drm_color_lut);
+
+ gamma = dc_create_gamma();
+ if (!gamma)
+ return -ENOMEM;
+
+ gamma->num_entries = lut_size;
+ if (gamma->num_entries == MAX_COLOR_LEGACY_LUT_ENTRIES)
+ gamma->type = GAMMA_RGB_256;
+ else if (gamma->num_entries == MAX_COLOR_LUT_ENTRIES)
+ gamma->type = GAMMA_CS_TFM_1D;
+ else {
+ /* Invalid lut size */
+ dc_gamma_release(&gamma);
+ return -EINVAL;
+ }
- gamma->num_entries = lut_size;
- if (gamma->num_entries == MAX_COLOR_LEGACY_LUT_ENTRIES)
- gamma->type = GAMMA_RGB_256;
- else if (gamma->num_entries == MAX_COLOR_LUT_ENTRIES)
- gamma->type = GAMMA_CS_TFM_1D;
- else {
- /* Invalid lut size */
- dc_gamma_release(&gamma);
- return -EINVAL;
+ /* Convert drm_lut into dc_gamma */
+ __drm_lut_to_dc_gamma(lut, gamma, gamma->type == GAMMA_RGB_256);
}
- /* Convert drm_lut into dc_gamma */
- __drm_lut_to_dc_gamma(lut, gamma, gamma->type == GAMMA_RGB_256);
-
- /* Call color module to translate into something DC understands. Namely
- * a transfer function.
+ /* predefined gamma ROM only exist for RAVEN and pre-RAVEN ASIC,
+ * set canRomBeUsed accordingly
*/
stream->out_transfer_func->type = TF_TYPE_DISTRIBUTED_POINTS;
ret = mod_color_calculate_regamma_params(stream->out_transfer_func,
- gamma, true, adev->asic_type <= CHIP_RAVEN, NULL);
- dc_gamma_release(&gamma);
+ gamma, true, adev->asic_type <= CHIP_RAVEN, NULL);
+
+ if (gamma)
+ dc_gamma_release(&gamma);
+
if (!ret) {
stream->out_transfer_func->type = old_type;
DRM_ERROR("Out of memory when calculating regamma params\n");
--
2.17.1
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