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| author | Jacopo Mondi <jacopo@jmondi.org> | 2020-05-09 11:04:49 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-05-18 15:34:56 +0200 |
| commit | 344897ef1d9b33e246b64e255d807ca6c053f349 (patch) | |
| tree | dc2be999c92c119c38072b83888bab6c1832f941 /drivers/media | |
| parent | 926645d43fd43622a2b056471a2cf41cc19cbf4c (diff) | |
| download | linux-344897ef1d9b33e246b64e255d807ca6c053f349.tar.bz2 | |
media: v4l2-fwnode: Add helper to parse device properties
Add an helper function to parse common device properties in the same
way as v4l2_fwnode_endpoint_parse() parses common endpoint properties.
Parse the 'rotation' and 'orientation' properties from the firmware
interface.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-fwnode.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c index e1f273ae8522..6cd52e1ef5e4 100644 --- a/drivers/media/v4l2-core/v4l2-fwnode.c +++ b/drivers/media/v4l2-core/v4l2-fwnode.c @@ -756,6 +756,48 @@ err: } EXPORT_SYMBOL_GPL(v4l2_fwnode_connector_add_link); +int v4l2_fwnode_device_parse(struct device *dev, + struct v4l2_fwnode_device_properties *props) +{ + struct fwnode_handle *fwnode = dev_fwnode(dev); + u32 val; + int ret; + + memset(props, 0, sizeof(*props)); + + props->orientation = V4L2_FWNODE_PROPERTY_UNSET; + ret = fwnode_property_read_u32(fwnode, "orientation", &val); + if (!ret) { + switch (val) { + case V4L2_FWNODE_ORIENTATION_FRONT: + case V4L2_FWNODE_ORIENTATION_BACK: + case V4L2_FWNODE_ORIENTATION_EXTERNAL: + break; + default: + dev_warn(dev, "Unsupported device orientation: %u\n", val); + return -EINVAL; + } + + props->orientation = val; + dev_dbg(dev, "device orientation: %u\n", val); + } + + props->rotation = V4L2_FWNODE_PROPERTY_UNSET; + ret = fwnode_property_read_u32(fwnode, "rotation", &val); + if (!ret) { + if (val >= 360) { + dev_warn(dev, "Unsupported device rotation: %u\n", val); + return -EINVAL; + } + + props->rotation = val; + dev_dbg(dev, "device rotation: %u\n", val); + } + + return 0; +} +EXPORT_SYMBOL_GPL(v4l2_fwnode_device_parse); + static int v4l2_async_notifier_fwnode_parse_endpoint(struct device *dev, struct v4l2_async_notifier *notifier, |