summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/drm_edid.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
-rw-r--r--drivers/gpu/drm/drm_edid.c55
1 files changed, 47 insertions, 8 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 649cfd8b4200..e804ac5dec02 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -1570,6 +1570,50 @@ static void connector_bad_edid(struct drm_connector *connector,
}
}
+/* Get override or firmware EDID */
+static struct edid *drm_get_override_edid(struct drm_connector *connector)
+{
+ struct edid *override = NULL;
+
+ if (connector->override_edid)
+ override = drm_edid_duplicate(connector->edid_blob_ptr->data);
+
+ if (!override)
+ override = drm_load_edid_firmware(connector);
+
+ return IS_ERR(override) ? NULL : override;
+}
+
+/**
+ * drm_add_override_edid_modes - add modes from override/firmware EDID
+ * @connector: connector we're probing
+ *
+ * Add modes from the override/firmware EDID, if available. Only to be used from
+ * drm_helper_probe_single_connector_modes() as a fallback for when DDC probe
+ * failed during drm_get_edid() and caused the override/firmware EDID to be
+ * skipped.
+ *
+ * Return: The number of modes added or 0 if we couldn't find any.
+ */
+int drm_add_override_edid_modes(struct drm_connector *connector)
+{
+ struct edid *override;
+ int num_modes = 0;
+
+ override = drm_get_override_edid(connector);
+ if (override) {
+ drm_connector_update_edid_property(connector, override);
+ num_modes = drm_add_edid_modes(connector, override);
+ kfree(override);
+
+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s] adding %d modes via fallback override/firmware EDID\n",
+ connector->base.id, connector->name, num_modes);
+ }
+
+ return num_modes;
+}
+EXPORT_SYMBOL(drm_add_override_edid_modes);
+
/**
* drm_do_get_edid - get EDID data using a custom EDID block read function
* @connector: connector we're probing
@@ -1597,15 +1641,10 @@ struct edid *drm_do_get_edid(struct drm_connector *connector,
{
int i, j = 0, valid_extensions = 0;
u8 *edid, *new;
- struct edid *override = NULL;
-
- if (connector->override_edid)
- override = drm_edid_duplicate(connector->edid_blob_ptr->data);
-
- if (!override)
- override = drm_load_edid_firmware(connector);
+ struct edid *override;
- if (!IS_ERR_OR_NULL(override))
+ override = drm_get_override_edid(connector);
+ if (override)
return override;
if ((edid = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)