drm/i915/dp: Return early if DSC not supported

Check for DSC support before computing link config with DSC.
For DP MST we are already doing the same.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241217093244.3938132-3-ankit.k.nautiyal@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 908b9887f89bd727d64a4446c611cea1be63eb14..dd2da9facaad19227a7d72b28f286bd8b220be33 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2375,9 +2375,6 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
                 intel_dp_supports_fec(intel_dp, connector, pipe_config) &&
                 !intel_dp_is_uhbr(pipe_config));
 
-       if (!intel_dp_supports_dsc(intel_dp, connector, pipe_config))
-               return -EINVAL;
-
        if (!intel_dp_dsc_supports_format(connector, pipe_config->output_format))
                return -EINVAL;
 
@@ -2652,6 +2649,9 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
                            str_yes_no(ret), str_yes_no(joiner_needs_dsc),
                            str_yes_no(intel_dp->force_dsc_en));
 
+               if (!intel_dp_supports_dsc(intel_dp, connector, pipe_config))
+                       return -EINVAL;
+
                if (!intel_dp_compute_config_limits(intel_dp, pipe_config,
                                                    respect_downstream_limits,
                                                    true,