From: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
Go with DSC only if the given output_format is supported.
v2: Use drm helper to get DSC format support for sink.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 30 +++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 30c55f980014..6e531872ff38 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1483,6 +1483,31 @@ static int intel_dp_dsc_compute_params(struct intel_encoder *encoder,
return drm_dsc_compute_rc_parameters(vdsc_cfg);
}
+static bool intel_dp_dsc_supports_format(struct intel_dp *intel_dp,
+ enum intel_output_format output_format)
+{
+ u8 sink_dsc_format;
+
+ switch (output_format) {
+ case INTEL_OUTPUT_FORMAT_RGB:
+ sink_dsc_format = DP_DSC_RGB;
+ break;
+ case INTEL_OUTPUT_FORMAT_YCBCR444:
+ sink_dsc_format = DP_DSC_YCbCr444;
+ break;
+ case INTEL_OUTPUT_FORMAT_YCBCR420:
+ if (min(intel_dp_source_dsc_version_minor(intel_dp),
+ intel_dp_sink_dsc_version_minor(intel_dp)) < 2)
+ return false;
+ sink_dsc_format = DP_DSC_YCbCr420_Native;
+ break;
+ default:
+ return false;
+ }
+
+ return drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd, sink_dsc_format);
+}
+
int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
struct intel_crtc_state *pipe_config,
struct drm_connector_state *conn_state,
@@ -1503,11 +1528,16 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
if (!intel_dp_supports_dsc(intel_dp, pipe_config))
return -EINVAL;
+ if (!intel_dp_dsc_supports_format(intel_dp, pipe_config->output_format))
+ return -EINVAL;
+
if (compute_pipe_bpp)
pipe_bpp = intel_dp_dsc_compute_bpp(intel_dp, conn_state->max_requested_bpc);
else
pipe_bpp = pipe_config->pipe_bpp;
+ pipe_bpp = intel_dp_dsc_compute_bpp(intel_dp, conn_state->max_requested_bpc);
+
if (intel_dp->force_dsc_bpc) {
pipe_bpp = intel_dp->force_dsc_bpc * 3;
drm_dbg_kms(&dev_priv->drm, "Input DSC BPP forced to %d", pipe_bpp);
--
2.25.1
