Fill the crtc_state members to store the configuration required by PCONs
for color/format conversion for a YCBCR420 mode and the computed output
format.
This will be later used during protocol_converter_config to program the
PCON to use appropriate color/format conversion.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 27 +++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index b6f62444b589..4c1a0d9f750c 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1970,6 +1970,30 @@ static bool intel_dp_has_audio(struct intel_encoder *encoder,
return intel_conn_state->force_audio == HDMI_AUDIO_ON;
}
+static void
+intel_dp_compute_dfp_ycbcr420(struct intel_encoder *encoder,
+ struct intel_crtc_state *crtc_state)
+{
+ struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+ if (!drm_dp_is_branch(intel_dp->dpcd))
+ return;
+
+ /* Mode is YCBCR420, output_format is also YCBCR420: Passthrough */
+ if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
+ return;
+
+ /* Mode is YCBCR420, output_format is YCBCR444: Downsample */
+ if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444) {
+ crtc_state->dp_dfp_config.ycbcr_444_to_420 = true;
+ return;
+ }
+
+ /* Mode is YCBCR420, output_format is RGB: Convert to YCBCR444 and Downsample */
+ crtc_state->dp_dfp_config.rgb_to_ycbcr = true;
+ crtc_state->dp_dfp_config.ycbcr_444_to_420 = true;
+}
+
static int
intel_dp_compute_output_format(struct intel_encoder *encoder,
struct intel_crtc_state *crtc_state,
@@ -1987,6 +2011,8 @@ intel_dp_compute_output_format(struct intel_encoder *encoder,
ycbcr_420_only = drm_mode_is_420_only(info, adjusted_mode);
crtc_state->output_format = intel_dp_output_format(connector, ycbcr_420_only);
+ if (ycbcr_420_only)
+ intel_dp_compute_dfp_ycbcr420(encoder, crtc_state);
if (ycbcr_420_only && !intel_dp_is_ycbcr420(intel_dp, crtc_state)) {
drm_dbg_kms(&i915->drm,
@@ -2003,6 +2029,7 @@ intel_dp_compute_output_format(struct intel_encoder *encoder,
return ret;
crtc_state->output_format = intel_dp_output_format(connector, true);
+ intel_dp_compute_dfp_ycbcr420(encoder, crtc_state);
ret = intel_dp_compute_link_config(encoder, crtc_state, conn_state,
respect_downstream_limits);
}
--
2.25.1
