[PATCH v2 26/34] drm/amd/display: add plane 3D LUT support
From: Melissa Wen
Date: Thu Aug 10 2023 - 12:06:11 EST
Wire up DC 3D LUT to DM plane color management (pre-blending). On AMD
display HW, 3D LUT comes after a shaper curve and we always have to
program a shaper curve to delinearize or normalize the color space
before applying a 3D LUT (since we have a reduced number of LUT
entries).
In this version, the default values of 3D LUT for size and bit_depth are
17x17x17 and 12-bit, but we already provide here a more generic
mechanisms to program other supported values (9x9x9 size and 10-bit).
v2:
- started with plane 3D LUT instead of CRTC 3D LUT support
Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx> (v1)
Signed-off-by: Melissa Wen <mwen@xxxxxxxxxx>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 +
.../amd/display/amdgpu_dm/amdgpu_dm_color.c | 96 ++++++++++++++++++-
2 files changed, 94 insertions(+), 3 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 347ecff2c920..025a7eb5c8aa 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8062,6 +8062,7 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
bundle->surface_updates[planes_count].gamut_remap_matrix = &dc_plane->gamut_remap_matrix;
bundle->surface_updates[planes_count].hdr_mult = dc_plane->hdr_mult;
bundle->surface_updates[planes_count].func_shaper = dc_plane->in_shaper_func;
+ bundle->surface_updates[planes_count].lut3d_func = dc_plane->lut3d_func;
}
amdgpu_dm_plane_fill_dc_scaling_info(dm->adev, new_plane_state,
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 90ec09ca4118..58c4797f506e 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
@@ -598,6 +598,85 @@ amdgpu_tf_to_dc_tf(enum amdgpu_transfer_function tf)
}
}
+static void __to_dc_lut3d_color(struct dc_rgb *rgb,
+ const struct drm_color_lut lut,
+ int bit_precision)
+{
+ rgb->red = drm_color_lut_extract(lut.red, bit_precision);
+ rgb->green = drm_color_lut_extract(lut.green, bit_precision);
+ rgb->blue = drm_color_lut_extract(lut.blue, bit_precision);
+}
+
+static void __drm_3dlut_to_dc_3dlut(const struct drm_color_lut *lut,
+ uint32_t lut3d_size,
+ struct tetrahedral_params *params,
+ bool use_tetrahedral_9,
+ int bit_depth)
+{
+ struct dc_rgb *lut0;
+ struct dc_rgb *lut1;
+ struct dc_rgb *lut2;
+ struct dc_rgb *lut3;
+ int lut_i, i;
+
+
+ if (use_tetrahedral_9) {
+ lut0 = params->tetrahedral_9.lut0;
+ lut1 = params->tetrahedral_9.lut1;
+ lut2 = params->tetrahedral_9.lut2;
+ lut3 = params->tetrahedral_9.lut3;
+ } else {
+ lut0 = params->tetrahedral_17.lut0;
+ lut1 = params->tetrahedral_17.lut1;
+ lut2 = params->tetrahedral_17.lut2;
+ lut3 = params->tetrahedral_17.lut3;
+ }
+
+ for (lut_i = 0, i = 0; i < lut3d_size - 4; lut_i++, i += 4) {
+ /* We should consider the 3dlut RGB values are distributed
+ * along four arrays lut0-3 where the first sizes 1229 and the
+ * other 1228. The bit depth supported for 3dlut channel is
+ * 12-bit, but DC also supports 10-bit.
+ *
+ * TODO: improve color pipeline API to enable the userspace set
+ * bit depth and 3D LUT size/stride, as specified by VA-API.
+ */
+ __to_dc_lut3d_color(&lut0[lut_i], lut[i], bit_depth);
+ __to_dc_lut3d_color(&lut1[lut_i], lut[i + 1], bit_depth);
+ __to_dc_lut3d_color(&lut2[lut_i], lut[i + 2], bit_depth);
+ __to_dc_lut3d_color(&lut3[lut_i], lut[i + 3], bit_depth);
+ }
+ /* lut0 has 1229 points (lut_size/4 + 1) */
+ __to_dc_lut3d_color(&lut0[lut_i], lut[i], bit_depth);
+}
+
+/* amdgpu_dm_atomic_lut3d - set DRM 3D LUT to DC stream
+ * @drm_lut3d: DRM CRTC (user) 3D LUT
+ * @drm_lut3d_size: size of 3D LUT
+ * @lut3d: DC 3D LUT
+ *
+ * Map DRM CRTC 3D LUT to DC 3D LUT and all necessary bits to program it
+ * on DCN MPC accordingly.
+ */
+static void amdgpu_dm_atomic_lut3d(const struct drm_color_lut *drm_lut,
+ uint32_t drm_lut3d_size,
+ struct dc_3dlut *lut)
+{
+ if (!drm_lut3d_size) {
+ lut->state.bits.initialized = 0;
+ } else {
+ /* Stride and bit depth are not programmable by API yet.
+ * Therefore, only supports 17x17x17 3D LUT (12-bit).
+ */
+ lut->lut_3d.use_tetrahedral_9 = false;
+ lut->lut_3d.use_12bits = true;
+ lut->state.bits.initialized = 1;
+ __drm_3dlut_to_dc_3dlut(drm_lut, drm_lut3d_size, &lut->lut_3d,
+ lut->lut_3d.use_tetrahedral_9,
+ MAX_COLOR_3DLUT_BITDEPTH);
+ }
+}
+
static int amdgpu_dm_atomic_shaper_lut(const struct drm_color_lut *shaper_lut,
bool has_rom,
enum dc_transfer_func_predefined tf,
@@ -652,7 +731,7 @@ int amdgpu_dm_verify_lut3d_size(struct amdgpu_device *adev,
struct drm_plane_state *plane_state)
{
struct dm_plane_state *dm_plane_state = to_dm_plane_state(plane_state);
- const struct drm_color_lut *shaper = NULL;
+ const struct drm_color_lut *shaper = NULL, *lut3d = NULL;
uint32_t exp_size, size;
/* shaper LUT is only available if 3D LUT color caps*/
@@ -663,6 +742,14 @@ int amdgpu_dm_verify_lut3d_size(struct amdgpu_device *adev,
drm_dbg(&adev->ddev,
"Invalid Shaper LUT size. Should be %u but got %u.\n",
exp_size, size);
+ }
+
+ exp_size = amdgpu_dm_get_lut3d_size(adev, MAX_COLOR_3DLUT_ENTRIES);
+ lut3d = __extract_blob_lut(dm_plane_state->lut3d, &size);
+
+ if (lut3d && size != exp_size) {
+ drm_dbg(&adev->ddev, "Invalid 3D LUT size. Should be %u but got %u.\n",
+ exp_size, size);
return -EINVAL;
}
@@ -962,8 +1049,8 @@ amdgpu_dm_plane_set_color_properties(struct drm_plane_state *plane_state,
{
struct dm_plane_state *dm_plane_state = to_dm_plane_state(plane_state);
enum amdgpu_transfer_function shaper_tf = AMDGPU_TRANSFER_FUNCTION_DEFAULT;
- const struct drm_color_lut *shaper_lut;
- uint32_t shaper_size;
+ const struct drm_color_lut *shaper_lut, *lut3d;
+ uint32_t shaper_size, lut3d_size;
int ret;
/* We have nothing to do here, return */
@@ -975,7 +1062,10 @@ amdgpu_dm_plane_set_color_properties(struct drm_plane_state *plane_state,
shaper_lut = __extract_blob_lut(dm_plane_state->shaper_lut, &shaper_size);
shaper_size = shaper_lut != NULL ? shaper_size : 0;
shaper_tf = dm_plane_state->shaper_tf;
+ lut3d = __extract_blob_lut(dm_plane_state->lut3d, &lut3d_size);
+ lut3d_size = lut3d != NULL ? lut3d_size : 0;
+ amdgpu_dm_atomic_lut3d(lut3d, lut3d_size, dc_plane_state->lut3d_func);
ret = amdgpu_dm_atomic_shaper_lut(shaper_lut, false,
amdgpu_tf_to_dc_tf(shaper_tf),
shaper_size,
--
2.40.1