From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Use drm_dp_downstream_mode() to get a suitable mode for downstream
facing ports which don't have an EDID.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 047449253a54..2798621a466a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -6310,7 +6310,7 @@ static int intel_dp_get_modes(struct drm_connector *connector)
}
/* if eDP has no EDID, fall back to fixed mode */
- if (intel_dp_is_edp(intel_attached_dp(to_intel_connector(connector))) &&
+ if (intel_dp_is_edp(intel_attached_dp(intel_connector)) &&
intel_connector->panel.fixed_mode) {
struct drm_display_mode *mode;
@@ -6322,6 +6322,19 @@ static int intel_dp_get_modes(struct drm_connector *connector)
}
}
+ if (!edid) {
+ struct intel_dp *intel_dp = intel_attached_dp(intel_connector);
+ struct drm_display_mode *mode;
+
+ mode = drm_dp_downstream_mode(connector->dev,
+ intel_dp->dpcd,
+ intel_dp->downstream_ports);
+ if (mode) {
+ drm_mode_probed_add(connector, mode);
+ return 1;
+ }
+ }
+
return 0;
}
--
2.26.2
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