This can help drivers to make somewhat intelligent decisions in their
->detect callback: If the connector is hpd capable and in the unknown
state, the driver needs to force a full detect cycle. Otherwise it
could just (if it chooses so) to update the connector state from it's
hpd handler directly, and always return that in the ->detect callback.
Atm only drm/i915 calls drm_mode_config_reset at resume time, so other
drivers would need to add that call first before using this facility.
Signed-Off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
drivers/gpu/drm/drm_crtc.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index ef1b221..05c4e7b 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -555,6 +555,7 @@ int drm_connector_init(struct drm_device *dev,
INIT_LIST_HEAD(&connector->probed_modes);
INIT_LIST_HEAD(&connector->modes);
connector->edid_blob_ptr = NULL;
+ connector->status = connector_status_unknown;
list_add_tail(&connector->head, &dev->mode_config.connector_list);
dev->mode_config.num_connector++;
@@ -3656,9 +3657,12 @@ void drm_mode_config_reset(struct drm_device *dev)
if (encoder->funcs->reset)
encoder->funcs->reset(encoder);
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ connector->status = connector_status_unknown;
+
if (connector->funcs->reset)
connector->funcs->reset(connector);
+ }
}
EXPORT_SYMBOL(drm_mode_config_reset);
--
1.7.11.7
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