[Intel-gfx] [PATCH v4 2/7] drm/i915: Add CRTC output format YCBCR 4:4:4

[Shashank Sharma]

This patch adds support for YCBCR 4:4:4 CRTC output format.
To do this, this patch extends the existing YCBCR 4:2:0
framework by:
- Adding new parameter in for YCBCR 4:4:4 enum crtc_iutput_format.
- Adding case for YCBCR 4:4:4 in while setting AVI infoframes.
- Adding necessary checks in modeset sequence.

V3: Added this patch in the series
V4: Added r-b from Maarten (for v3)
    Addressed review comment from Ville:
    Do not use (config->output_format > CRTC_OUTPUT_RGB)

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
---
 drivers/gpu/drm/i915/intel_color.c   |  3 ++-
 drivers/gpu/drm/i915/intel_display.c | 14 ++++++++++----
 drivers/gpu/drm/i915/intel_drv.h     |  1 +
 drivers/gpu/drm/i915/intel_hdmi.c    |  2 ++
 4 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index 99e32cb..5b76de6 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -141,7 +141,8 @@ static void i9xx_load_csc_matrix(struct drm_crtc_state *crtc_state)
 	uint16_t coeffs[9] = { 0, };
 	struct intel_crtc_state *intel_crtc_state = to_intel_crtc_state(crtc_state);
 
-	if (intel_crtc_state->output_format == CRTC_OUTPUT_YCBCR420) {
+	if (intel_crtc_state->output_format == CRTC_OUTPUT_YCBCR420 ||
+	    intel_crtc_state->output_format == CRTC_OUTPUT_YCBCR444) {
 		i9xx_load_ycbcr_conversion_matrix(intel_crtc);
 		return;
 	} else if (crtc_state->ctm) {
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 877336d..4a40de9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6363,8 +6363,9 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
 		return -EINVAL;
 	}
 
-	if (pipe_config->output_format == CRTC_OUTPUT_YCBCR420 &&
-	    pipe_config->base.ctm) {
+	if ((pipe_config->output_format == CRTC_OUTPUT_YCBCR420 ||
+	     pipe_config->output_format == CRTC_OUTPUT_YCBCR444) &&
+	     pipe_config->base.ctm) {
 		/*
 		 * There is only one pipe CSC unit per pipe, and we need that
 		 * for output conversion from RGB->YCBCR. So if CTM is already
@@ -8194,11 +8195,13 @@ static void haswell_set_pipemisc(struct drm_crtc *crtc)
 		if (intel_crtc->config->dither)
 			val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
 
-		if (config->output_format == CRTC_OUTPUT_YCBCR420) {
+		if (config->output_format == CRTC_OUTPUT_YCBCR420 ||
+		    config->output_format == CRTC_OUTPUT_YCBCR444)
 			val |= PIPEMISC_OUTPUT_COLORSPACE_YUV;
+
+		if (config->output_format == CRTC_OUTPUT_YCBCR420)
 			val |= PIPEMISC_YUV420_ENABLE |
 			       PIPEMISC_YUV420_MODE_FULL_BLEND;
-		}
 
 		I915_WRITE(PIPEMISC(intel_crtc->pipe), val);
 	}
@@ -9176,6 +9179,7 @@ static void haswell_get_ddi_port_state(struct intel_crtc *crtc,
 static const char * const output_format_str[] = {
 	"Invalid",
 	"RGB",
+	"YCBCR4:4:4",
 	"YCBCR4:2:0",
 };
 
@@ -9241,6 +9245,8 @@ static bool haswell_get_pipe_config(struct intel_crtc *crtc,
 					output_format = CRTC_OUTPUT_INVALID;
 				else
 					output_format = CRTC_OUTPUT_YCBCR420;
+			} else {
+				output_format = CRTC_OUTPUT_YCBCR444;
 			}
 
 		}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 35be78e..04b38c9 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -690,6 +690,7 @@ struct intel_crtc_wm_state {
 enum intel_output_format {
 	CRTC_OUTPUT_INVALID,
 	CRTC_OUTPUT_RGB,
+	CRTC_OUTPUT_YCBCR444,
 	CRTC_OUTPUT_YCBCR420,
 };
 
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 6700ed6..02c5954 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -481,6 +481,8 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder,
 
 	if (crtc_state->output_format == CRTC_OUTPUT_YCBCR420)
 		frame.avi.colorspace = HDMI_COLORSPACE_YUV420;
+	else if (crtc_state->output_format == CRTC_OUTPUT_YCBCR444)
+		frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
 	else
 		frame.avi.colorspace = HDMI_COLORSPACE_RGB;
 
-- 
2.7.4