Implement Plane Gamma on ICL.
Signed-off-by: Uma Shankar uma.shankar@intel.com --- drivers/gpu/drm/i915/intel_color.c | 75 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c index 504c046..22790b4 100644 --- a/drivers/gpu/drm/i915/intel_color.c +++ b/drivers/gpu/drm/i915/intel_color.c @@ -692,10 +692,85 @@ static void icl_load_plane_degamma_lut(const struct drm_plane_state *state, } }
+static void icl_load_plane_gamma_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; + + lut_size = 32; + if (icl_is_hdr_plane(dev_priv, plane)) { + 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 { + 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); + icl_load_plane_gamma_lut(state, 0); }
static void glk_load_degamma_lut(const struct intel_crtc_state *crtc_state)