[v7 11/16] drm/i915/icl: Enable Plane Degamma

Uma Shankar
2019-03-28T20:16:09Z

Enable Plane Degamma for ICL.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
---
drivers/gpu/drm/i915/intel_color.c | 86 ++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index afb1d00..504c046 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -615,6 +615,89 @@ static void broadwell_load_plane_luts(const struct drm_plane_state *state)
INTEL_INFO(dev_priv)->plane_color.plane_degamma_lut_size);
}

+static void icl_load_plane_degamma_lut(const struct drm_plane_state *state,
+ 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;
+ if (state->degamma_lut) {
+ struct drm_color_lut_ext *lut =
+ (struct drm_color_lut_ext *)state->gamma_lut->data;
+
+ for (i = 0; i < lut_size; i++) {
+ u64 word = drm_color_lut_extract_ext(lut[i].red,
+ 24);
+ u32 lut_val = (word & 0x7ffffffff) >> 8;
+
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, i),
+ lut_val);
+ }
+
+ /* Program the max register to clamp values > 1.0. */
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 0),
+ drm_color_lut_extract_ext(lut[i].red, 24));
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 1),
+ drm_color_lut_extract_ext(lut[i].green, 24));
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 2),
+ drm_color_lut_extract_ext(lut[i].blue, 24));
+ } else {
+ for (i = 0; i < lut_size; i++) {
+ u32 v = (i * ((1 << 24) - 1)) / (lut_size - 1);
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, i), v);
+ }
+
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 0),
+ (1 << 24) - 1);
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 1),
+ (1 << 24) - 1);
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA_ENH(pipe, plane, 2),
+ (1 << 24) - 1);
+ }
+ } else {
+ lut_size = 32;
+ if (state->degamma_lut) {
+ struct drm_color_lut *lut =
+ (struct drm_color_lut *)state->gamma_lut->data;
+
+ for (i = 0; i < lut_size; i++)
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA(pipe, plane, i),
+ lut[i].green);
+
+ /* Program the max register to clamp values > 1.0. */
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0),
+ (1 << 16));
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 1),
+ (1 << 16));
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 2),
+ (1 << 16));
+ } else {
+ for (i = 0; i < lut_size; i++) {
+ u32 v = (i * ((1 << 24) - 1)) / (lut_size - 1);
+
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA(pipe, plane, i), v);
+ }
+
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0),
+ (1 << 16));
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 1),
+ (1 << 16));
+ I915_WRITE(PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 2),
+ (1 << 16));
+ }
+ }
+}
+
+/* Loads the palette/gamma unit for the CRTC on Gen11+. */
+static void icl_load_plane_luts(const struct drm_plane_state *state)
+{
+ icl_load_plane_degamma_lut(state, 0);
+}
+
static void glk_load_degamma_lut(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
@@ -978,6 +1061,9 @@ void intel_color_init(struct intel_crtc *crtc)
dev_priv->display.color_commit = ilk_color_commit;
}

+ if (INTEL_GEN(dev_priv) >= 11)
+ dev_priv->display.load_plane_luts = icl_load_plane_luts;
+
/* Enable color management support when we have degamma & gamma LUTs. */
if (INTEL_INFO(dev_priv)->color.degamma_lut_size != 0 &&
INTEL_INFO(dev_priv)->color.gamma_lut_size != 0)