To get HDMI YCBCR420 output, the PIPEMISC register should be
programmed to:
- Generate YCBCR output (bit 11)
- In case of YCBCR420 outputs, it should be programmed in full
blend mode to use the scaler in 5x3 ratio (bits 26 and 27)
This patch:
- Adds definition of these bits.
- Programs PIPEMISC for YCBCR outputs.
V2: rebase
V3: rebase
Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Ander Conselvan De Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 3 +++
drivers/gpu/drm/i915/intel_display.c | 9 +++++++++
2 files changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 88e4707..77921ec 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5196,6 +5196,9 @@ enum {
#define _PIPE_MISC_A 0x70030
#define _PIPE_MISC_B 0x71030
+#define PIPEMISC_YCBCR420_ENABLE (1<<27)
+#define PIPEMISC_YCBCR420_MODE_BLEND (1<<26)
+#define PIPEMISC_OUTPUT_YCBCR (1<<11)
#define PIPEMISC_DITHER_BPC_MASK (7<<5)
#define PIPEMISC_DITHER_8_BPC (0<<5)
#define PIPEMISC_DITHER_10_BPC (1<<5)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 983f581..71fd19e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8109,6 +8109,15 @@ static void haswell_set_pipemisc(struct drm_crtc *crtc)
if (intel_crtc->config->dither)
val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
+ if (hdmi_out > DRM_HDMI_OUTPUT_DEFAULT_RGB) {
+ val |= PIPEMISC_OUTPUT_YCBCR;
+
+ if (hdmi_out == DRM_HDMI_OUTPUT_YCBCR420) {
+ val |= PIPEMISC_YCBCR420_ENABLE |
+ PIPEMISC_YCBCR420_MODE_BLEND;
+ }
+ }
+
I915_WRITE(PIPEMISC(intel_crtc->pipe), val);
}
}
--
2.7.4
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