From: Pranay Samala <[email protected]> Implement plane pre-CSC LUT support for SDR planes.
Signed-off-by: Pranay Samala <[email protected]> --- drivers/gpu/drm/i915/display/intel_color.c | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c index 17ab4364faea..9f7c2a328868 100644 --- a/drivers/gpu/drm/i915/display/intel_color.c +++ b/drivers/gpu/drm/i915/display/intel_color.c @@ -3992,6 +3992,59 @@ xelpd_load_hdr_pre_csc_lut(struct intel_display *display, intel_de_write_dsb(display, dsb, PLANE_PRE_CSC_GAMC_INDEX_ENH(pipe, plane, 0), 0); } +static void +xelpd_load_sdr_pre_csc_lut(struct intel_display *display, + struct intel_dsb *dsb, + enum pipe pipe, + enum plane_id plane, + const struct drm_color_lut32 *pre_csc_lut) +{ + u32 lut_size = 32; + u32 lut_val; + int i; + + /* + * First 3 planes are HDR, so reduce by 3 to get to the right + * SDR plane offset + */ + plane = plane - 3; + + intel_de_write_dsb(display, dsb, + PLANE_PRE_CSC_GAMC_INDEX(pipe, plane, 0), + PLANE_PAL_PREC_AUTO_INCREMENT); + + if (pre_csc_lut) { + for (i = 0; i < lut_size; i++) { + lut_val = drm_color_lut_extract(pre_csc_lut[i].green, 16); + + intel_de_write_dsb(display, dsb, + PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0), + lut_val); + } + + do { + intel_de_write_dsb(display, dsb, + PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0), + (1 << 16)); + } while (i++ < 34); + } else { + for (i = 0; i < lut_size; i++) { + lut_val = (i * ((1 << 16) - 1)) / (lut_size - 1); + + intel_de_write_dsb(display, dsb, + PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0), lut_val); + } + + do { + intel_de_write_dsb(display, dsb, + PLANE_PRE_CSC_GAMC_DATA(pipe, plane, 0), + 1 << 16); + } while (i++ < 34); + } + + intel_de_write_dsb(display, dsb, PLANE_PRE_CSC_GAMC_INDEX(pipe, plane, 0), 0); +} + static void xelpd_program_plane_pre_csc_lut(struct intel_dsb *dsb, const struct intel_plane_state *plane_state) @@ -4004,6 +4057,8 @@ xelpd_program_plane_pre_csc_lut(struct intel_dsb *dsb, if (icl_is_hdr_plane(display, plane)) xelpd_load_hdr_pre_csc_lut(display, dsb, pipe, plane, pre_csc_lut); + else + xelpd_load_sdr_pre_csc_lut(display, dsb, pipe, plane, pre_csc_lut); } static void -- 2.25.1
