[RFC 30/33] drm/i915/color: Enable Plane CSC
Uma Shankar
uma.shankar at intel.com
Tue Aug 29 16:04:19 UTC 2023
Implement plane CSC for Xe_LPD.
Co-developed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
Signed-off-by: Uma Shankar <uma.shankar at intel.com>
---
drivers/gpu/drm/i915/display/intel_color.c | 86 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_color.h | 1 +
.../drm/i915/display/skl_universal_plane.c | 4 +-
3 files changed, 90 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index ff996b9ee77d..956080fb7fcd 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -2068,6 +2068,83 @@ static void xelpd_plane_load_luts(const struct drm_plane_state *plane_state)
}
}
+static void xelpd_load_plane_csc_matrix(const struct drm_plane_state *state)
+{
+ 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;
+ struct drm_color_ctm *ctm;
+ const u64 *input;
+ u16 coeffs[9] = {};
+ u16 postoff = 0;
+ int i;
+
+ if (!icl_is_hdr_plane(dev_priv, plane) || !state->color.ctm)
+ return;
+
+ ctm = state->color.ctm->data;
+ input = ctm->matrix;
+
+ /*
+ * Convert fixed point S31.32 input to format supported by the
+ * hardware.
+ */
+ for (i = 0; i < ARRAY_SIZE(coeffs); i++) {
+ u64 abs_coeff = ((1ULL << 63) - 1) & input[i];
+
+ /*
+ * Clamp input value to min/max supported by
+ * hardware.
+ */
+ abs_coeff = clamp_val(abs_coeff, 0, CTM_COEFF_4_0 - 1);
+
+ /* sign bit */
+ if (CTM_COEFF_NEGATIVE(input[i]))
+ coeffs[i] |= 1 << 15;
+
+ if (abs_coeff < CTM_COEFF_0_125)
+ coeffs[i] |= (3 << 12) |
+ ILK_CSC_COEFF_FP(abs_coeff, 12);
+ else if (abs_coeff < CTM_COEFF_0_25)
+ coeffs[i] |= (2 << 12) |
+ ILK_CSC_COEFF_FP(abs_coeff, 11);
+ else if (abs_coeff < CTM_COEFF_0_5)
+ coeffs[i] |= (1 << 12) |
+ ILK_CSC_COEFF_FP(abs_coeff, 10);
+ else if (abs_coeff < CTM_COEFF_1_0)
+ coeffs[i] |= ILK_CSC_COEFF_FP(abs_coeff, 9);
+ else if (abs_coeff < CTM_COEFF_2_0)
+ coeffs[i] |= (7 << 12) |
+ ILK_CSC_COEFF_FP(abs_coeff, 8);
+ else
+ coeffs[i] |= (6 << 12) |
+ ILK_CSC_COEFF_FP(abs_coeff, 7);
+ }
+
+ intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 0),
+ coeffs[0] << 16 | coeffs[1]);
+ intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 1),
+ coeffs[2] << 16);
+
+ intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 2),
+ coeffs[3] << 16 | coeffs[4]);
+ intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 3),
+ coeffs[5] << 16);
+
+ intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 4),
+ coeffs[6] << 16 | coeffs[7]);
+ intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 5),
+ coeffs[8] << 16);
+
+ intel_de_write_fw(dev_priv, PLANE_CSC_PREOFF(pipe, plane, 0), 0);
+ intel_de_write_fw(dev_priv, PLANE_CSC_PREOFF(pipe, plane, 1), 0);
+ intel_de_write_fw(dev_priv, PLANE_CSC_PREOFF(pipe, plane, 2), 0);
+
+ intel_de_write_fw(dev_priv, PLANE_CSC_POSTOFF(pipe, plane, 0), postoff);
+ intel_de_write_fw(dev_priv, PLANE_CSC_POSTOFF(pipe, plane, 1), postoff);
+ intel_de_write_fw(dev_priv, PLANE_CSC_POSTOFF(pipe, plane, 2), postoff);
+}
+
void intel_color_load_luts(const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
@@ -2083,6 +2160,14 @@ void intel_color_load_plane_luts(const struct drm_plane_state *plane_state)
i915->display.funcs.color->load_plane_luts(plane_state);
}
+void intel_color_load_plane_csc_matrix(const struct drm_plane_state *plane_state)
+{
+ struct drm_i915_private *i915 = to_i915(plane_state->plane->dev);
+
+ if (i915->display.funcs.color->load_plane_csc_matrix)
+ i915->display.funcs.color->load_plane_csc_matrix(plane_state);
+}
+
void intel_color_commit_noarm(const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
@@ -3925,6 +4010,7 @@ static const struct intel_color_funcs xelpd_color_funcs = {
.lut_equal = icl_lut_equal,
.read_csc = icl_read_csc,
.load_plane_luts = xelpd_plane_load_luts,
+ .load_plane_csc_matrix = xelpd_load_plane_csc_matrix,
};
static const struct intel_color_funcs tgl_color_funcs = {
diff --git a/drivers/gpu/drm/i915/display/intel_color.h b/drivers/gpu/drm/i915/display/intel_color.h
index 93382df101d9..a513c88d3bfc 100644
--- a/drivers/gpu/drm/i915/display/intel_color.h
+++ b/drivers/gpu/drm/i915/display/intel_color.h
@@ -33,4 +33,5 @@ bool intel_color_lut_equal(const struct intel_crtc_state *crtc_state,
void intel_color_assert_luts(const struct intel_crtc_state *crtc_state);
void intel_color_plane_init(struct drm_plane *plane);
void intel_color_load_plane_luts(const struct drm_plane_state *plane_state);
+void intel_color_load_plane_csc_matrix(const struct drm_plane_state *plane_state);
#endif /* __INTEL_COLOR_H__ */
diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
index c08875fa965e..c85548d3210a 100644
--- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
+++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
@@ -1280,8 +1280,10 @@ icl_plane_update_noarm(struct intel_plane *plane,
if (plane_state->force_black)
icl_plane_csc_load_black(plane);
- if (plane_state->uapi.color_mgmt_changed)
+ if (plane_state->uapi.color_mgmt_changed) {
intel_color_load_plane_luts(&plane_state->uapi);
+ intel_color_load_plane_csc_matrix(&plane_state->uapi);
+ }
intel_psr2_program_plane_sel_fetch_noarm(plane, crtc_state, plane_state, color_plane);
}
--
2.38.1
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