Add callback for programming Pre-CSC LUT for TGL and beyond
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@xxxxxxxxx>
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_color.c | 88 ++++++++++++++++++++++
1 file changed, 88 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 0d68f8303502..6dd9b8e43352 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -3779,9 +3779,97 @@ void intel_color_load_plane_csc_matrix(const struct drm_plane_state *plane_state
i915->display.funcs.color->load_plane_csc_matrix(plane_state, blob);
}
+static void xelpd_program_plane_pre_csc_lut(const struct drm_plane_state *state,
+ const struct drm_color_lut_ext *pre_csc_lut,
+ u32 offset)
+{
+ struct drm_i915_private *dev_priv = to_i915(state->plane->dev);
+ enum pipe pipe = to_intel_plane(state->plane)->pipe;
+ enum plane_id plane = to_intel_plane(state->plane)->id;
+ u32 i, lut_size;
+
+ if (icl_is_hdr_plane(dev_priv, plane)) {
+ lut_size = 128;
+
+ intel_de_write_fw(dev_priv, PLANE_PRE_CSC_GAMC_INDEX_ENH(pipe, plane, 0),
+ offset | PLANE_PAL_PREC_AUTO_INCREMENT);
+
+ if (pre_csc_lut) {
+ for (i = 0; i < lut_size; i++) {
+ u64 word = drm_color_lut_extract_ext(pre_csc_lut[i].green, 24);
+ u32 lut_val = (word & 0xffffff);
+
+ intel_de_write_fw(dev_priv,
+ PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 0),
+ lut_val);
+ }
+
+ /* Program the max register to clamp values > 1.0. */
+ while (i < 131)
+ intel_de_write_fw(dev_priv,
+ PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 0),
+ pre_csc_lut[i++].green);
+ } else {
+ for (i = 0; i < lut_size; i++) {
+ u32 v = (i * ((1 << 24) - 1)) / (lut_size - 1);
+
+ intel_de_write_fw(dev_priv,
+ PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 0), v);
+ }
+
+ do {
+ intel_de_write_fw(dev_priv,
+ PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 0),
+ 1 << 24);
+ } while (i++ < 130);
+ }
+
+ intel_de_write_fw(dev_priv, PLANE_PRE_CSC_GAMC_INDEX_ENH(pipe, plane, 0), 0);
+ } else {
+ lut_size = 32;
+
+ /*
+ * First 3 planes are HDR, so reduce by 3 to get to the right
+ * SDR plane offset
+ */
+ plane = plane - 3;
+
+ intel_de_write_fw(dev_priv, PLANE_PRE_CSC_GAMC_INDEX(pipe, plane, 0),
+ offset | PLANE_PAL_PREC_AUTO_INCREMENT);
+
+ if (pre_csc_lut) {
+ for (i = 0; i < lut_size; i++)
+ intel_de_write_fw(dev_priv, PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0),
+ pre_csc_lut[i].green);
+ /* Program the max register to clamp values > 1.0. */
+ while (i < 35)
+ intel_de_write_fw(dev_priv, PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0),
+ pre_csc_lut[i++].green);
+ } else {
+ for (i = 0; i < lut_size; i++) {
+ u32 v = (i * ((1 << 16) - 1)) / (lut_size - 1);
+
+ intel_de_write_fw(dev_priv,
+ PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0), v);
+ }
+
+ do {
+ intel_de_write_fw(dev_priv, PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0),
+ 1 << 16);
+ } while (i++ < 34);
+ }
+
+ intel_de_write_fw(dev_priv, PLANE_PRE_CSC_GAMC_INDEX(pipe, plane, 0), 0);
+ }
+}
+
static void xelpd_plane_load_luts(const struct drm_plane_state *plane_state,
const struct drm_property_blob *blob, bool is_pre_csc)
{
+ struct drm_color_lut_ext *lut = blob->data;
+
+ if (is_pre_csc)
+ xelpd_program_plane_pre_csc_lut(plane_state, lut, 0);
}
void intel_color_load_plane_luts(const struct drm_plane_state *plane_state,
--
2.42.0
