drm/nouveau/dp: probe dpcd to determine connectedness
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 7dac5e2..1fa222e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -111,15 +111,15 @@
kfree(connector);
}
-static struct nouveau_i2c_port *
-nouveau_connector_ddc_detect(struct drm_connector *connector,
- struct nouveau_encoder **pnv_encoder)
+static struct nouveau_encoder *
+nouveau_connector_ddc_detect(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct nouveau_connector *nv_connector = nouveau_connector(connector);
struct nouveau_drm *drm = nouveau_drm(dev);
struct nouveau_gpio *gpio = nouveau_gpio(drm->device);
- struct nouveau_i2c_port *port = NULL;
+ struct nouveau_encoder *nv_encoder;
+ struct drm_mode_object *obj;
int i, panel = -ENODEV;
/* eDP panels need powering on by us (if the VBIOS doesn't default it
@@ -134,13 +134,9 @@
}
}
- for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
- struct nouveau_encoder *nv_encoder;
- struct drm_mode_object *obj;
- int id;
-
- id = connector->encoder_ids[i];
- if (!id)
+ for (i = 0; nv_encoder = NULL, i < DRM_CONNECTOR_MAX_ENCODER; i++) {
+ int id = connector->encoder_ids[i];
+ if (id == 0)
break;
obj = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_ENCODER);
@@ -148,22 +144,24 @@
continue;
nv_encoder = nouveau_encoder(obj_to_encoder(obj));
- port = nv_encoder->i2c;
- if (port && nv_probe_i2c(port, 0x50)) {
- *pnv_encoder = nv_encoder;
- break;
+ if (nv_encoder->dcb->type == DCB_OUTPUT_DP) {
+ int ret = nouveau_dp_detect(nv_encoder);
+ if (ret == 0)
+ break;
+ } else
+ if (nv_encoder->i2c) {
+ if (nv_probe_i2c(nv_encoder->i2c, 0x50))
+ break;
}
-
- port = NULL;
}
/* eDP panel not detected, restore panel power GPIO to previous
* state to avoid confusing the SOR for other output types.
*/
- if (!port && panel == 0)
+ if (!nv_encoder && panel == 0)
gpio->set(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff, panel);
- return port;
+ return nv_encoder;
}
static struct nouveau_encoder *
@@ -262,8 +260,8 @@
if (ret < 0 && ret != -EACCES)
return conn_status;
- i2c = nouveau_connector_ddc_detect(connector, &nv_encoder);
- if (i2c) {
+ nv_encoder = nouveau_connector_ddc_detect(connector);
+ if (nv_encoder && (i2c = nv_encoder->i2c) != NULL) {
nv_connector->edid = drm_get_edid(connector, &i2c->adapter);
drm_mode_connector_update_edid_property(connector,
nv_connector->edid);
@@ -273,14 +271,6 @@
goto detect_analog;
}
- if (nv_encoder->dcb->type == DCB_OUTPUT_DP &&
- !nouveau_dp_detect(to_drm_encoder(nv_encoder))) {
- NV_ERROR(drm, "Detected %s, but failed init\n",
- connector->name);
- conn_status = connector_status_disconnected;
- goto out;
- }
-
/* Override encoder type for DVI-I based on whether EDID
* says the display is digital or analog, both use the
* same i2c channel so the value returned from ddc_detect