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drm/i915/dp: Check if force_dsc_output_format is possible

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Currently for testing an output format with DSC, we just force the
output format, without checking if it can be supported.
This also creates an issue where there is a PCON which might need to
convert from forced output format to the format to sink format.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230817142459.89764-19-ankit.k.nautiyal@intel.com
This commit is contained in:
Ankit Nautiyal 2023-08-17 19:54:59 +05:30
parent 61d340faaa
commit 7adfec8c33
1 changed files with 28 additions and 2 deletions
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30
drivers/gpu/drm/i915/display/intel_dp.c
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@ -935,16 +935,42 @@ dfp_can_convert_from_ycbcr444(struct intel_dp *intel_dp,
return false;
}
static bool
dfp_can_convert(struct intel_dp *intel_dp,
enum intel_output_format output_format,
enum intel_output_format sink_format)
{
switch (output_format) {
case INTEL_OUTPUT_FORMAT_RGB:
return dfp_can_convert_from_rgb(intel_dp, sink_format);
case INTEL_OUTPUT_FORMAT_YCBCR444:
return dfp_can_convert_from_ycbcr444(intel_dp, sink_format);
default:
MISSING_CASE(output_format);
return false;
}
return false;
}
static enum intel_output_format
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);
enum intel_output_format force_dsc_output_format =
intel_dp->force_dsc_output_format;
enum intel_output_format output_format;
if (force_dsc_output_format) {
if (source_can_output(intel_dp, force_dsc_output_format) &&
(!drm_dp_is_branch(intel_dp->dpcd) ||
sink_format != force_dsc_output_format ||
dfp_can_convert(intel_dp, force_dsc_output_format, sink_format)))
return force_dsc_output_format;
if (intel_dp->force_dsc_output_format)
return intel_dp->force_dsc_output_format;
drm_dbg_kms(&i915->drm, "Cannot force DSC output format\n");
}
if (sink_format == INTEL_OUTPUT_FORMAT_RGB ||
dfp_can_convert_from_rgb(intel_dp, sink_format))