[PATCH 07/12] drm/i915: Sprinke a few sanity check WARNS during csc assignment

[Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>]

From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

Make sure the csc enable bit(s) match the way we're about to
fill the csc matrices.

Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/display/intel_color.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 7e8820583942..2988c91d8ff6 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -373,10 +373,16 @@ static void ilk_assign_csc(struct intel_crtc_state *crtc_state)
 	bool limited_color_range = ilk_csc_limited_range(crtc_state);
 
 	if (crtc_state->hw.ctm) {
+		drm_WARN_ON(&i915->drm, !crtc_state->csc_enable);
+
 		ilk_csc_convert_ctm(crtc_state, &crtc_state->csc, limited_color_range);
 	} else if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB) {
+		drm_WARN_ON(&i915->drm, !crtc_state->csc_enable);
+
 		ilk_csc_copy(i915, &crtc_state->csc, &ilk_csc_matrix_rgb_to_ycbcr);
 	} else if (limited_color_range) {
+		drm_WARN_ON(&i915->drm, !crtc_state->csc_enable);
+
 		ilk_csc_copy(i915, &crtc_state->csc, &ilk_csc_matrix_limited_range);
 	} else if (crtc_state->csc_enable) {
 		/*
@@ -406,16 +412,26 @@ static void icl_assign_csc(struct intel_crtc_state *crtc_state)
 	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
 
 	if (crtc_state->hw.ctm) {
+		drm_WARN_ON(&i915->drm, (crtc_state->csc_mode & ICL_CSC_ENABLE) == 0);
+
 		ilk_csc_convert_ctm(crtc_state, &crtc_state->csc, false);
 	} else {
+		drm_WARN_ON(&i915->drm, (crtc_state->csc_mode & ICL_CSC_ENABLE) != 0);
+
 		intel_csc_clear(&crtc_state->csc);
 	}
 
 	if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB) {
+		drm_WARN_ON(&i915->drm, (crtc_state->csc_mode & ICL_OUTPUT_CSC_ENABLE) == 0);
+
 		ilk_csc_copy(i915, &crtc_state->output_csc, &ilk_csc_matrix_rgb_to_ycbcr);
 	} else if (crtc_state->limited_color_range) {
+		drm_WARN_ON(&i915->drm, (crtc_state->csc_mode & ICL_OUTPUT_CSC_ENABLE) == 0);
+
 		ilk_csc_copy(i915, &crtc_state->output_csc, &ilk_csc_matrix_limited_range);
 	} else {
+		drm_WARN_ON(&i915->drm, (crtc_state->csc_mode & ICL_OUTPUT_CSC_ENABLE) != 0);
+
 		intel_csc_clear(&crtc_state->output_csc);
 	}
 }
@@ -476,9 +492,15 @@ static void chv_load_cgm_csc(struct intel_crtc *crtc,
 
 static void chv_assign_csc(struct intel_crtc_state *crtc_state)
 {
+	struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+
 	if (crtc_state->hw.ctm) {
+		drm_WARN_ON(&i915->drm, (crtc_state->cgm_mode & CGM_PIPE_MODE_CSC) == 0);
+
 		chv_cgm_csc_convert_ctm(crtc_state, &crtc_state->csc);
 	} else {
+		drm_WARN_ON(&i915->drm, (crtc_state->cgm_mode & CGM_PIPE_MODE_CSC) != 0);
+
 		intel_csc_clear(&crtc_state->csc);
 	}
 }
-- 
2.39.2