Currently soc-camera can use power regulators and platform specific
methods to power clients up and down. Additionally, client drivers can
provide their own subdevice .s_power() methods, acting directly on the
device. This patch adds calls to this method, when external power
supplies are on.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
---
drivers/media/video/soc_camera.c | 38 ++++++++++++++++++++++++++++++++++----
1 files changed, 34 insertions(+), 4 deletions(-)
diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c
index de374da..5656b27 100644
--- a/drivers/media/video/soc_camera.c
+++ b/drivers/media/video/soc_camera.c
@@ -67,19 +67,36 @@ static int soc_camera_power_on(struct soc_camera_device *icd,
if (ret < 0) {
dev_err(icd->pdev,
"Platform failed to power-on the camera.\n");
-
- regulator_bulk_disable(icl->num_regulators,
- icl->regulators);
+ goto elinkpwr;
}
}
+ if (!ret) {
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ ret = v4l2_subdev_call(sd, core, s_power, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
+ goto esdpwr;
+ }
+
+ return 0;
+
+esdpwr:
+ if (icl->power)
+ icl->power(icd->pdev, 0);
+elinkpwr:
+ regulator_bulk_disable(icl->num_regulators,
+ icl->regulators);
return ret;
}
static int soc_camera_power_off(struct soc_camera_device *icd,
struct soc_camera_link *icl)
{
- int ret;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ int ret = v4l2_subdev_call(sd, core, s_power, 0);
+
+ if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
+ return ret;
if (icl->power) {
ret = icl->power(icd->pdev, 0);
@@ -1089,6 +1106,12 @@ static int soc_camera_probe(struct soc_camera_device *icd)
if (ret < 0)
goto ereg;
+ /*
+ * This will not yet call v4l2_subdev_core_ops::s_power(1), because the
+ * the subdevice has not yet been initialised. We'll have to call it
+ * once again after initialisation, even though it shouldn't be needed,
+ * we don't do any IO here.
+ */
ret = soc_camera_power_on(icd, icl);
if (ret < 0)
goto epower;
@@ -1156,6 +1179,10 @@ static int soc_camera_probe(struct soc_camera_device *icd)
if (ret < 0)
goto evidstart;
+ ret = v4l2_subdev_call(sd, core, s_power, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ goto esdpwr;
+
/* Try to improve our guess of a reasonable window format */
if (!v4l2_subdev_call(sd, video, g_mbus_fmt, &mf)) {
icd->user_width = mf.width;
@@ -1172,6 +1199,8 @@ static int soc_camera_probe(struct soc_camera_device *icd)
return 0;
+esdpwr:
+ video_unregister_device(icd->vdev);
evidstart:
mutex_unlock(&icd->video_lock);
soc_camera_free_user_formats(icd);
@@ -1185,6 +1214,7 @@ eiufmt:
enodrv:
eadddev:
video_device_release(icd->vdev);
+ icd->vdev = NULL;
evdc:
ici->ops->remove(icd);
eadd:
--
1.7.2.5
--
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