}
}
+static void intel_edp_mso_init(struct intel_dp *intel_dp)
+{
+ struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+ u8 mso;
+
+ if (intel_dp->edp_dpcd[0] < DP_EDP_14)
+ return;
+
+ if (drm_dp_dpcd_readb(&intel_dp->aux, DP_EDP_MSO_LINK_CAPABILITIES, &mso) != 1) {
+ drm_err(&i915->drm, "Failed to read MSO cap\n");
+ return;
+ }
+
+ /* Valid configurations are SST or MSO 2x1, 2x2, 4x1 */
+ mso &= DP_EDP_MSO_NUMBER_OF_LINKS_MASK;
+ if (mso % 2 || mso > drm_dp_max_lane_count(intel_dp->dpcd)) {
+ drm_err(&i915->drm, "Invalid MSO link count cap %u\n", mso);
+ mso = 0;
+ }
+
+ if (mso) {
+ drm_dbg_kms(&i915->drm, "Sink MSO %ux%u configuration\n",
+ mso, drm_dp_max_lane_count(intel_dp->dpcd) / mso);
+ drm_err(&i915->drm, "No source MSO support, disabling\n");
+ mso = 0;
+ }
+
+ intel_dp->mso_link_count = mso;
+ intel_dp->mso_pixel_overlap = 0; /* FIXME: read from DisplayID v2.0 */
+}
+
static bool
intel_edp_init_dpcd(struct intel_dp *intel_dp)
{
*/
intel_edp_init_source_oui(intel_dp, true);
+ intel_edp_mso_init(intel_dp);
+
return true;
}