Now, we can use shaper LUT to delinearize and/or normalize the color
space for a more efficient 3D LUT support (so far, only for DRM atomic
color mgmt). If a degamma 1D LUT is passed to linearize the color space,
a custom shaper 1D LUT can be used before applying 3D LUT.
Signed-off-by: Melissa Wen <m...@igalia.com>
---
.../amd/display/amdgpu_dm/amdgpu_dm_color.c | 95 ++++++++++++++++---
1 file changed, 83 insertions(+), 12 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 8a930f9bce60..81b20ac9ff19 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
@@ -497,14 +497,62 @@ static void amdgpu_dm_atomic_lut3d(struct dc_stream_state
*stream,
stream->lut3d_func = lut;
}
+static int __set_func_shaper(struct dc_transfer_func *shaper_func,
+ const struct drm_color_lut *lut, uint32_t lut_size)
+{
+ struct dc_gamma *gamma = NULL;
+ struct calculate_buffer cal_buffer = {0};
+ bool res;
+
+ ASSERT(lut && lut_size == MAX_COLOR_LUT_ENTRIES);
+
+ cal_buffer.buffer_index = -1;
+
+ gamma = dc_create_gamma();
+ if (!gamma)
+ return -ENOMEM;
+
+ gamma->num_entries = lut_size;
+ __drm_lut_to_dc_gamma(lut, gamma, false);
+
+ /*
+ * Color module doesn't like calculating gamma params
+ * on top of a linear input. But degamma params can be used
+ * instead to simulate this.
+ */
+ gamma->type = GAMMA_CUSTOM;
+ res = mod_color_calculate_degamma_params(NULL, shaper_func, gamma,
true);
+
+ dc_gamma_release(&gamma);
+
+ return res ? 0 : -ENOMEM;
+}
+
static int amdgpu_dm_atomic_shaper_lut(struct dc_stream_state *stream,
+ const struct drm_color_lut *shaper_lut,
+ uint32_t shaper_size,
struct dc_transfer_func *func_shaper_new)
{
- /* We don't get DRM shaper LUT yet. We assume the input color space is
already
+ /* If no DRM shaper LUT, we assume the input color space is already
* delinearized, so we don't need a shaper LUT and we can just BYPASS
*/
- func_shaper_new->type = TF_TYPE_BYPASS;
- func_shaper_new->tf = TRANSFER_FUNCTION_LINEAR;
+ if (!shaper_size) {
+ func_shaper_new->type = TF_TYPE_BYPASS;
+ func_shaper_new->tf = TRANSFER_FUNCTION_LINEAR;
+ } else {
+ int r;
+
+ /* If DRM shaper LUT is set, we assume a linear color space
+ * (linearized by DRM degamma 1D LUT or not)
+ */
+ func_shaper_new->type = TF_TYPE_DISTRIBUTED_POINTS;
+ func_shaper_new->tf = TRANSFER_FUNCTION_LINEAR;
+
+ r = __set_func_shaper(func_shaper_new, shaper_lut, shaper_size);
+ if (r)
+ return r;
+ }
+
stream->func_shaper = func_shaper_new;
return 0;
@@ -514,6 +562,8 @@ static int amdgpu_dm_atomic_shaper_lut(struct
dc_stream_state *stream,
* interface
* @dc: Display Core control structure
* @stream: DC stream state to set shaper LUT and 3D LUT
+ * @drm_shaper_lut: DRM CRTC (user) shaper LUT
+ * @drm_shaper_size: size of shaper LUT
* @drm_lut3d: DRM CRTC (user) 3D LUT
* @drm_lut3d_size: size of 3D LUT
*
@@ -522,6 +572,8 @@ static int amdgpu_dm_atomic_shaper_lut(struct
dc_stream_state *stream,
*/
static int amdgpu_dm_atomic_shaper_lut3d(struct dc *dc,
struct dc_stream_state *stream,
+ const struct drm_color_lut
*drm_shaper_lut,
+ uint32_t drm_shaper_size,
const struct drm_color_lut *drm_lut3d,
uint32_t drm_lut3d_size,
const struct drm_mode_lut3d_mode *mode)
@@ -532,11 +584,11 @@ static int amdgpu_dm_atomic_shaper_lut3d(struct dc *dc,
lut3d_func_new = (struct dc_3dlut *) stream->lut3d_func;
func_shaper_new = (struct dc_transfer_func *) stream->func_shaper;
-
amdgpu_dm_atomic_lut3d(stream, drm_lut3d, drm_lut3d_size,
mode, lut3d_func_new);
- return amdgpu_dm_atomic_shaper_lut(stream, func_shaper_new);
+ return amdgpu_dm_atomic_shaper_lut(stream, drm_shaper_lut,
+ drm_shaper_size, func_shaper_new);
}
static const struct drm_mode_lut3d_mode *
@@ -569,13 +621,23 @@ get_lut3d_mode(struct amdgpu_device *adev,
int amdgpu_dm_verify_lut3d_size(struct amdgpu_device *adev,
const struct drm_crtc_state *crtc_state)
{
- const struct drm_color_lut *lut3d = NULL;
+ const struct drm_color_lut *shaper = NULL, *lut3d = NULL;
const struct drm_mode_lut3d_mode *mode;
uint32_t exp_size, size;
+ /* shaper LUT is only available if 3D LUT color caps*/
+ exp_size = has_mpc_lut3d_caps(&adev->dm) ? MAX_COLOR_LUT_ENTRIES : 0;
+ shaper = __extract_blob_lut(crtc_state->shaper_lut, &size);
+
+ if (shaper && size != exp_size) {
+ DRM_DEBUG_DRIVER(
+ "Invalid Shaper LUT size. Should be %u but got %u.\n",
+ exp_size, size);
+ return -EINVAL;
+ }
+
mode = get_lut3d_mode(adev, crtc_state);
exp_size = mode ? mode->lut_size * mode->lut_size * mode->lut_size : 0;
-
lut3d = __extract_blob_lut(crtc_state->lut3d, &size);
if (lut3d && size != exp_size) {
@@ -617,11 +679,11 @@ int amdgpu_dm_update_crtc_color_mgmt(struct dm_crtc_state
*crtc)
bool has_rom = adev->asic_type <= CHIP_RAVEN;
struct drm_color_ctm *ctm = NULL;
const struct drm_color_lut *degamma_lut, *regamma_lut;
- const struct drm_color_lut *lut3d;
+ const struct drm_color_lut *shaper_lut, *lut3d;
uint32_t degamma_size, regamma_size;
- uint32_t lut3d_size;
+ uint32_t lut3d_size, shaper_size;
bool has_regamma, has_degamma;
- bool has_lut3d;
+ bool has_lut3d, has_shaper_lut;
bool is_legacy;
int r;
@@ -634,12 +696,14 @@ int amdgpu_dm_update_crtc_color_mgmt(struct dm_crtc_state
*crtc)
return r;
degamma_lut = __extract_blob_lut(crtc->base.degamma_lut, °amma_size);
+ shaper_lut = __extract_blob_lut(crtc->base.shaper_lut, &shaper_size);
lut3d = __extract_blob_lut(crtc->base.lut3d, &lut3d_size);
regamma_lut = __extract_blob_lut(crtc->base.gamma_lut, ®amma_size);
has_degamma =
degamma_lut && !__is_lut_linear(degamma_lut, degamma_size);
+ has_shaper_lut = shaper_lut != NULL;
has_lut3d = lut3d != NULL;
has_regamma =
@@ -680,10 +744,17 @@ int amdgpu_dm_update_crtc_color_mgmt(struct dm_crtc_state
*crtc)
return r;
} else {
if (has_lut3d) {
- r = amdgpu_dm_atomic_shaper_lut3d(adev->dm.dc, stream,
lut3d, lut3d_size,
+ /* enable 3D LUT only for DRM atomic color mgmt */
+ shaper_size = has_shaper_lut ? shaper_size : 0;
+
+ r = amdgpu_dm_atomic_shaper_lut3d(adev->dm.dc, stream,
+ shaper_lut,
shaper_size,
+ lut3d, lut3d_size,
get_lut3d_mode(adev,
&crtc->base));
- if (r)
+ if (r) {
+ DRM_DEBUG_DRIVER("Failed to set shaper and 3D
LUT\n");
return r;
+ }
}
/* Note: OGAM is disabled if 3D LUT is successfully programmed.
* See params and set_output_gamma in
--
2.35.1
