If PCON has capability to convert RGB->YUV colorspace and also
to 444->420 downsampling then for any YUV420 only mode, we can
let the PCON do all the conversion.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
.../drm/i915/display/intel_display_types.h | 1 +
drivers/gpu/drm/i915/display/intel_dp.c | 37 +++++++++++++------
2 files changed, 26 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index b41de41759a0..4150108bdc6d 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1460,6 +1460,7 @@ struct intel_dp {
int pcon_max_frl_bw, sink_max_frl_bw;
u8 max_bpc;
bool ycbcr_444_to_420;
+ bool rgb_to_ycbcr;
} dfp;
/* Display stream compression testing */
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 30c76ba63232..b3f1190d8150 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -651,6 +651,10 @@ intel_dp_output_format(struct drm_connector *connector,
!drm_mode_is_420_only(info, mode))
return INTEL_OUTPUT_FORMAT_RGB;
+ if (intel_dp->dfp.rgb_to_ycbcr &&
+ intel_dp->dfp.ycbcr_444_to_420)
+ return INTEL_OUTPUT_FORMAT_RGB;
+
if (intel_dp->dfp.ycbcr_444_to_420)
return INTEL_OUTPUT_FORMAT_YCBCR444;
else
@@ -4365,13 +4369,12 @@ void intel_dp_configure_protocol_converter(struct intel_dp *intel_dp)
"Failed to set protocol converter YCbCr 4:2:0 conversion mode to %s\n",
enableddisabled(intel_dp->dfp.ycbcr_444_to_420));
- tmp = 0;
-
- if (drm_dp_dpcd_writeb(&intel_dp->aux,
- DP_PROTOCOL_CONVERTER_CONTROL_2, tmp) <= 0)
+ tmp = intel_dp->dfp.rgb_to_ycbcr ?
+ DP_CONVERSION_BT601_RGB_YCBCR_ENABLE : 0;
+ if (drm_dp_pcon_convert_rgb_to_ycbcr(&intel_dp->aux, tmp) <= 0)
drm_dbg_kms(&i915->drm,
- "Failed to set protocol converter YCbCr 4:2:2 conversion mode to %s\n",
- enableddisabled(false));
+ "Failed to set protocol converter RGB->YCbCr conversion mode to %s\n",
+ enableddisabled(intel_dp->dfp.rgb_to_ycbcr));
}
static void intel_enable_dp(struct intel_atomic_state *state,
@@ -6897,7 +6900,7 @@ intel_dp_update_420(struct intel_dp *intel_dp)
{
struct drm_i915_private *i915 = dp_to_i915(intel_dp);
struct intel_connector *connector = intel_dp->attached_connector;
- bool is_branch, ycbcr_420_passthrough, ycbcr_444_to_420;
+ bool is_branch, ycbcr_420_passthrough, ycbcr_444_to_420, rgb_to_ycbcr;
/* No YCbCr output support on gmch platforms */
if (HAS_GMCH(i915))
@@ -6919,14 +6922,23 @@ intel_dp_update_420(struct intel_dp *intel_dp)
dp_to_dig_port(intel_dp)->lspcon.active ||
drm_dp_downstream_444_to_420_conversion(intel_dp->dpcd,
intel_dp->downstream_ports);
+ rgb_to_ycbcr = drm_dp_downstream_rgb_to_ycbcr_conversion(intel_dp->dpcd,
+ intel_dp->downstream_ports);
if (INTEL_GEN(i915) >= 11) {
+ /* Let PCON convert from RGB->YCbCr if possible */
+ if (is_branch && rgb_to_ycbcr && ycbcr_444_to_420) {
+ intel_dp->dfp.rgb_to_ycbcr = true;
+ intel_dp->dfp.ycbcr_444_to_420 = true;
+ connector->base.ycbcr_420_allowed = true;
+ } else {
/* Prefer 4:2:0 passthrough over 4:4:4->4:2:0 conversion */
- intel_dp->dfp.ycbcr_444_to_420 =
- ycbcr_444_to_420 && !ycbcr_420_passthrough;
+ intel_dp->dfp.ycbcr_444_to_420 =
+ ycbcr_444_to_420 && !ycbcr_420_passthrough;
- connector->base.ycbcr_420_allowed =
- !is_branch || ycbcr_444_to_420 || ycbcr_420_passthrough;
+ connector->base.ycbcr_420_allowed =
+ !is_branch || ycbcr_444_to_420 || ycbcr_420_passthrough;
+ }
} else {
/* 4:4:4->4:2:0 conversion is the only way */
intel_dp->dfp.ycbcr_444_to_420 = ycbcr_444_to_420;
@@ -6935,8 +6947,9 @@ intel_dp_update_420(struct intel_dp *intel_dp)
}
drm_dbg_kms(&i915->drm,
- "[CONNECTOR:%d:%s] YCbCr 4:2:0 allowed? %s, YCbCr 4:4:4->4:2:0 conversion? %s\n",
+ "[CONNECTOR:%d:%s] RGB->YcbCr conversion? %s, YCbCr 4:2:0 allowed? %s, YCbCr 4:4:4->4:2:0 conversion? %s\n",
connector->base.base.id, connector->base.name,
+ yesno(intel_dp->dfp.rgb_to_ycbcr),
yesno(connector->base.ycbcr_420_allowed),
yesno(intel_dp->dfp.ycbcr_444_to_420));
}
--
2.17.1
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