From d1844606fd63af1994e153a8607d4b13709bc395 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Thu, 18 Jul 2019 17:50:53 +0300
Subject: drm/i915: Add PIPECONF YCbCr 4:4:4 programming for ILK-IVB
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Git-commit: d1844606fd63af1994e153a8607d4b13709bc395
Patch-mainline: v5.5-rc1
References: bsc#1152489
On ILK-IVB the pipe colorspace is configured via PIPECONF
(as opposed to PIPEMISC in BDW+). Let's configure+readout
that stuff correctly.
Enabling YCbCr 4:4:4 output will now be a simple matter of
setting crtc_state->output_format appropriately in the encoder
.compute_config(). However, when we do that we must be
aware of the fact that YCbCr DP output doesn't seem to work
on ILK (resulting image is totally garbled), but on SNB+
it works fine. However HDMI YCbCr output does work correctly
even on ILK.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190718145053.25808-13-ville.syrjala@linux.intel.com
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/display/intel_display.c | 21 +++++++++++++++++++-
drivers/gpu/drm/i915/i915_reg.h | 4 ++++
2 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 1bd91a061a0a..f5f655cde43a 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -9420,9 +9420,19 @@ static void ironlake_set_pipeconf(const struct intel_crtc_state *crtc_state)
else
val |= PIPECONF_PROGRESSIVE;
+ /*
+ * This would end up with an odd purple hue over
+ * the entire display. Make sure we don't do it.
+ */
+ WARN_ON(crtc_state->limited_color_range &&
+ crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB);
+
if (crtc_state->limited_color_range)
val |= PIPECONF_COLOR_RANGE_SELECT;
+ if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB)
+ val |= PIPECONF_OUTPUT_COLORSPACE_YUV709;
+
val |= PIPECONF_GAMMA_MODE(crtc_state->gamma_mode);
I915_WRITE(PIPECONF(pipe), val);
@@ -9959,7 +9969,6 @@ static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
if (!wakeref)
return false;
- pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
pipe_config->cpu_transcoder = (enum transcoder) crtc->pipe;
pipe_config->shared_dpll = NULL;
@@ -9988,6 +9997,16 @@ static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
if (tmp & PIPECONF_COLOR_RANGE_SELECT)
pipe_config->limited_color_range = true;
+ switch (tmp & PIPECONF_OUTPUT_COLORSPACE_MASK) {
+ case PIPECONF_OUTPUT_COLORSPACE_YUV601:
+ case PIPECONF_OUTPUT_COLORSPACE_YUV709:
+ pipe_config->output_format = INTEL_OUTPUT_FORMAT_YCBCR444;
+ break;
+ default:
+ pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
+ break;
+ }
+
pipe_config->gamma_mode = (tmp & PIPECONF_GAMMA_MODE_MASK_ILK) >>
PIPECONF_GAMMA_MODE_SHIFT;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 90c45fee9ce7..acbda6d89a9b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5683,6 +5683,10 @@ enum {
#define PIPECONF_CXSR_DOWNCLOCK (1 << 16)
#define PIPECONF_EDP_RR_MODE_SWITCH_VLV (1 << 14)
#define PIPECONF_COLOR_RANGE_SELECT (1 << 13)
+#define PIPECONF_OUTPUT_COLORSPACE_MASK (3 << 11) /* ilk-ivb */
+#define PIPECONF_OUTPUT_COLORSPACE_RGB (0 << 11) /* ilk-ivb */
+#define PIPECONF_OUTPUT_COLORSPACE_YUV601 (1 << 11) /* ilk-ivb */
+#define PIPECONF_OUTPUT_COLORSPACE_YUV709 (2 << 11) /* ilk-ivb */
#define PIPECONF_OUTPUT_COLORSPACE_YUV_HSW (1 << 11) /* hsw only */
#define PIPECONF_BPC_MASK (0x7 << 5)
#define PIPECONF_8BPC (0 << 5)
--
2.28.0