drm/i915/display: Add a WARN for invalid output range and format

Add a WARN to rule out an invalid output range and format
combination. This is to align the lspcon code with
compute_avi_infoframes.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201130204738.2443-6-uma.shankar@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
index 7cb65e0f241e7109637e197dd563ad8a5100f07c..9552dfc55e207cf8bf0fc84c18ea3f9bb6333f34 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
@@ -523,6 +523,10 @@ void lspcon_set_infoframes(struct intel_encoder *encoder,
        else
                frame.avi.colorspace = HDMI_COLORSPACE_RGB;
 
+       /* nonsense combination */
+       drm_WARN_ON(encoder->base.dev, crtc_state->limited_color_range &&
+                   crtc_state->output_format != INTEL_OUTPUT_FORMAT_RGB);
+
        if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB) {
                drm_hdmi_avi_infoframe_quant_range(&frame.avi,
                                                   conn_state->connector,