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[RFC,v2,2/5] drm/nouveau/kms: Don't probe eDP connectors more then once

Message ID 20210126001031.881048-3-lyude@redhat.com (mailing list archive)
State New, archived
Headers show
Series drm: Extract DPCD backlight helpers from i915, add support in nouveau | expand

Commit Message

Lyude Paul Jan. 26, 2021, 12:10 a.m. UTC
eDP doesn't do hotplugging, so there's no reason for us to reprobe it (unless a
connection status change is being forced, of course).

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Dave Airlie <airlied@gmail.com>
Cc: greg.depoire@gmail.com
 drivers/gpu/drm/nouveau/nouveau_connector.c | 6 ++++++
 1 file changed, 6 insertions(+)
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diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 14c29e68db8f..f4d16576a7da 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -556,6 +556,12 @@  nouveau_connector_detect(struct drm_connector *connector, bool force)
 	int ret;
 	enum drm_connector_status conn_status = connector_status_disconnected;
+	/* eDP doesn't do hotplugging, never probe more then once */
+	if (nv_connector->type == DCB_CONNECTOR_eDP &&
+	    connector->force == DRM_FORCE_UNSPECIFIED &&
+	    connector->status != connector_status_unknown)
+		return connector->status;
 	/* Outputs are only polled while runtime active, so resuming the
 	 * device here is unnecessary (and would deadlock upon runtime suspend
 	 * because it waits for polling to finish). We do however, want to