[Intel-gfx] [PATCH v5 7/8] drm/i915/dsc: Allow DSC only with YCbCr420 format when forced from debugfs

[Suraj Kandpal]

From: Swati Sharma <swati2.sha...@intel.com>

If force_dsc_ycbcr420_en is set through debugfs allow DSC iff
output_format is INTEL_OUTPUT_FORMAT_YCBCR420.

Signed-off-by: Swati Sharma <swati2.sha...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c 
b/drivers/gpu/drm/i915/display/intel_dp.c
index b7b7b40ce7ff..4d2314c10d2b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1507,6 +1507,10 @@ static int intel_dp_dsc_compute_config(struct intel_dp 
*intel_dp,
        if (!intel_dp_dsc_supports_format(intel_dp, pipe_config->output_format))
                return -EINVAL;
 
+       if (intel_dp->force_dsc_ycbcr420_en &&
+           pipe_config->output_format != INTEL_OUTPUT_FORMAT_YCBCR420)
+               return -EINVAL;
+
        pipe_bpp = intel_dp_dsc_compute_bpp(intel_dp, 
conn_state->max_requested_bpc);
 
        if (intel_dp->force_dsc_bpc) {
-- 
2.25.1