The decision to use DFP output format conversion capabilities should be
during compute_config phase.
This patch uses the members of intel_dp->dfp to only store the
format conversion capabilities of the DP device and uses the crtc_state
sink_format member, to program the protocol-converter for
colorspace/format conversion.
v2: Use sink_format to determine the color conversion config for the
pcon (Ville).
v3: Fix typo: missing 'break' in switch case (lkp kernel test robot).
v4: Add helper to check if DP supports YCBCR420.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 122 ++++++++++++++++--------
1 file changed, 84 insertions(+), 38 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 0e4f7b467970..95d0c653db7f 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -790,6 +790,7 @@ intel_dp_output_format(struct intel_connector *connector,
enum intel_output_format sink_format)
{
struct intel_dp *intel_dp = intel_attached_dp(connector);
+ struct drm_i915_private *i915 = dp_to_i915(intel_dp);
if (!connector->base.ycbcr_420_allowed ||
sink_format != INTEL_OUTPUT_FORMAT_YCBCR420)
@@ -799,6 +800,10 @@ intel_dp_output_format(struct intel_connector *connector,
intel_dp->dfp.ycbcr_444_to_420)
return INTEL_OUTPUT_FORMAT_RGB;
+ /* Prefer 4:2:0 passthrough over 4:4:4->4:2:0 conversion */
+ if (DISPLAY_VER(i915) >= 11 && intel_dp->dfp.ycbcr420_passthrough)
+ return INTEL_OUTPUT_FORMAT_YCBCR420;
+
if (intel_dp->dfp.ycbcr_444_to_420)
return INTEL_OUTPUT_FORMAT_YCBCR444;
else
@@ -2668,6 +2673,8 @@ void intel_dp_configure_protocol_converter(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+ bool ycbcr444_to_420 = false;
+ bool rgb_to_ycbcr = false;
u8 tmp;
if (intel_dp->dpcd[DP_DPCD_REV] < 0x13)
@@ -2684,8 +2691,35 @@ void intel_dp_configure_protocol_converter(struct intel_dp *intel_dp,
drm_dbg_kms(&i915->drm, "Failed to %s protocol converter HDMI mode\n",
str_enable_disable(intel_dp->has_hdmi_sink));
- tmp = crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444 &&
- intel_dp->dfp.ycbcr_444_to_420 ? DP_CONVERSION_TO_YCBCR420_ENABLE : 0;
+ if (crtc_state->sink_format == INTEL_OUTPUT_FORMAT_YCBCR420) {
+ switch (crtc_state->output_format) {
+ case INTEL_OUTPUT_FORMAT_YCBCR420:
+ /*
+ * sink_format is YCBCR420, output_format is also YCBCR420:
+ * Passthrough.
+ */
+ break;
+ case INTEL_OUTPUT_FORMAT_YCBCR444:
+ /*
+ * sink_format is YCBCR420, output_format is YCBCR444:
+ * Downsample.
+ */
+ ycbcr444_to_420 = true;
+ break;
+ case INTEL_OUTPUT_FORMAT_RGB:
+ /*
+ * sink_format is YCBCR420, output_format is RGB:
+ * Convert to YCBCR444 and Downsample.
+ */
+ rgb_to_ycbcr = true;
+ ycbcr444_to_420 = true;
+ break;
+ default:
+ break;
+ }
+ }
+
+ tmp = ycbcr444_to_420 ? DP_CONVERSION_TO_YCBCR420_ENABLE : 0;
if (drm_dp_dpcd_writeb(&intel_dp->aux,
DP_PROTOCOL_CONVERTER_CONTROL_1, tmp) != 1)
@@ -2693,13 +2727,12 @@ void intel_dp_configure_protocol_converter(struct intel_dp *intel_dp,
"Failed to %s protocol converter YCbCr 4:2:0 conversion mode\n",
str_enable_disable(intel_dp->dfp.ycbcr_444_to_420));
- tmp = intel_dp->dfp.rgb_to_ycbcr ?
- DP_CONVERSION_BT709_RGB_YCBCR_ENABLE : 0;
+ tmp = rgb_to_ycbcr ? DP_CONVERSION_BT709_RGB_YCBCR_ENABLE : 0;
if (drm_dp_pcon_convert_rgb_to_ycbcr(&intel_dp->aux, tmp) < 0)
drm_dbg_kms(&i915->drm,
- "Failed to %s protocol converter RGB->YCbCr conversion mode\n",
- str_enable_disable(tmp));
+ "Failed to %s protocol converter RGB->YCbCr conversion mode\n",
+ str_enable_disable(tmp));
}
bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp)
@@ -4544,57 +4577,70 @@ intel_dp_update_dfp(struct intel_dp *intel_dp,
intel_dp_get_pcon_dsc_cap(intel_dp);
}
-static void
-intel_dp_update_420(struct intel_dp *intel_dp)
+static bool
+intel_dp_can_ycbcr420(struct intel_connector *connector)
{
+ struct intel_dp *intel_dp = intel_attached_dp(connector);
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, rgb_to_ycbcr;
+ bool is_branch = drm_dp_is_branch(intel_dp->dpcd);
/* No YCbCr output support on gmch platforms */
if (HAS_GMCH(i915))
- return;
+ return false;
/*
* ILK doesn't seem capable of DP YCbCr output. The
* displayed image is severly corrupted. SNB+ is fine.
*/
if (IS_IRONLAKE(i915))
- return;
+ return false;
+ /*
+ * For Display < 11, YCBCR420 output possible only
+ * if DFP supports 444->420 conversion.
+ */
+ if (DISPLAY_VER(i915) < 11)
+ return is_branch && intel_dp->dfp.ycbcr_444_to_420;
+
+ /*
+ * For Display > 11:
+ * If not a branch device, can support YCBCR420.
+ */
+ if (!is_branch)
+ return true;
+
+ /*
+ * If branch device then either:
+ * 1. PCONs should support YCBCR420 Passthrough
+ * i.e.Source uses CSC, scaler to convert RGB->YCBCR420 and
+ * sends YCBCR420 to PCON. PCON 'passrthrough' YCBCR420 to sink.
+ * Or
+ * 2. PCONs should support 444->420
+ * (Source sends YCBCR444 PCON converts YCBCR444->420)
+ * (Source sends RGB4444 PCON converts RGB->YCBCR444 and YCBCR444->YCBCR420)
+ */
+ return intel_dp->dfp.ycbcr420_passthrough || intel_dp->dfp.ycbcr_444_to_420;
+}
- is_branch = drm_dp_is_branch(intel_dp->dpcd);
- ycbcr_420_passthrough =
+static void
+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;
+
+ intel_dp->dfp.ycbcr420_passthrough =
drm_dp_downstream_420_passthrough(intel_dp->dpcd,
intel_dp->downstream_ports);
/* on-board LSPCON always assumed to support 4:4:4->4:2:0 conversion */
- ycbcr_444_to_420 =
+ intel_dp->dfp.ycbcr_444_to_420 =
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,
- DP_DS_HDMI_BT709_RGB_YCBCR_CONV);
-
- if (DISPLAY_VER(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.rgb_to_ycbcr =
+ drm_dp_downstream_rgb_to_ycbcr_conversion(intel_dp->dpcd,
+ intel_dp->downstream_ports,
+ DP_DS_HDMI_BT709_RGB_YCBCR_CONV);
- 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;
-
- connector->base.ycbcr_420_allowed = ycbcr_444_to_420;
- }
+ connector->base.ycbcr_420_allowed = intel_dp_can_ycbcr420(connector);
drm_dbg_kms(&i915->drm,
"[CONNECTOR:%d:%s] RGB->YcbCr conversion? %s, YCbCr 4:2:0 allowed? %s, YCbCr 4:4:4->4:2:0 conversion? %s\n",
--
2.25.1
