diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2011-09-08 04:36:06 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-11-03 18:28:46 -0200 |
| commit | 7b9d8c3c4cfa0dc21f630c17c5f20e524dab487c (patch) | |
| tree | edfa0e9f6bbd728195a430dc8ed84c44742fa581 /drivers/media/video | |
| parent | fff96b6685d6fec14deaacbce9e27fbb8feed53d (diff) | |
[media] V4L: soc-camera: call subdevice .s_power() method, when powering up or down
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@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video')
| -rw-r--r-- | drivers/media/video/soc_camera.c | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c index d3eeb08be32..9a62ed08d86 100644 --- a/drivers/media/video/soc_camera.c +++ b/drivers/media/video/soc_camera.c @@ -53,10 +53,9 @@ static DEFINE_MUTEX(list_lock); /* Protects the list of hosts */ static int soc_camera_power_on(struct soc_camera_device *icd, struct soc_camera_link *icl) { - int ret; - - ret = regulator_bulk_enable(icl->num_regulators, - icl->regulators); + struct v4l2_subdev *sd = soc_camera_to_subdev(icd); + int ret = regulator_bulk_enable(icl->num_regulators, + icl->regulators); if (ret < 0) { dev_err(icd->pdev, "Cannot enable regulators\n"); return ret; @@ -67,19 +66,33 @@ 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; } } + 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); @@ -1029,6 +1042,12 @@ 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 + * subdevice has not been initialised yet. 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; @@ -1099,6 +1118,10 @@ 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; @@ -1115,6 +1138,8 @@ 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); @@ -1129,6 +1154,7 @@ ectrl: enodrv: eadddev: video_device_release(icd->vdev); + icd->vdev = NULL; evdc: ici->ops->remove(icd); eadd: |