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| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2022-01-22 12:25:57 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-04-24 09:04:27 +0200 |
| commit | 78a171e58717685ea0eb082a24bc75bd9e20518f (patch) | |
| tree | bcd145a6a0de39df91259acfa524c28d205f3546 /include/media | |
| parent | media: mc: media_device_init() initialises a media_device, not media_entity (diff) | |
| download | linux-78a171e58717685ea0eb082a24bc75bd9e20518f.tar.xz linux-78a171e58717685ea0eb082a24bc75bd9e20518f.zip | |
media: mc: Provide a helper for setting bus_info field
The bus_info or a similar field exists in a lot of structs, yet drivers
tend to set the value of that field by themselves in a determinable way.
Thus provide a helper for doing this. To be used in subsequent patches.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/media-device.h | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/include/media/media-device.h b/include/media/media-device.h index bc015d2cf541..f0baee6771ef 100644 --- a/include/media/media-device.h +++ b/include/media/media-device.h @@ -13,12 +13,13 @@ #include <linux/list.h> #include <linux/mutex.h> +#include <linux/pci.h> +#include <linux/platform_device.h> #include <media/media-devnode.h> #include <media/media-entity.h> struct ida; -struct device; struct media_device; /** @@ -181,8 +182,7 @@ struct media_device { atomic_t request_id; }; -/* We don't need to include pci.h or usb.h here */ -struct pci_dev; +/* We don't need to include usb.h here */ struct usb_device; #ifdef CONFIG_MEDIA_CONTROLLER @@ -502,4 +502,27 @@ static inline void __media_device_usb_init(struct media_device *mdev, #define media_device_usb_init(mdev, udev, name) \ __media_device_usb_init(mdev, udev, name, KBUILD_MODNAME) +/** + * media_set_bus_info() - Set bus_info field + * + * @bus_info: Variable where to write the bus info (char array) + * @bus_info_size: Length of the bus_info + * @dev: Related struct device + * + * Sets bus information based on &dev. This is currently done for PCI and + * platform devices. dev is required to be non-NULL for this to happen. + * + * This function is not meant to be called from drivers. + */ +static inline void +media_set_bus_info(char *bus_info, size_t bus_info_size, struct device *dev) +{ + if (!dev) + strscpy(bus_info, "no bus info", bus_info_size); + else if (dev_is_platform(dev)) + snprintf(bus_info, bus_info_size, "platform:%s", dev_name(dev)); + else if (dev_is_pci(dev)) + snprintf(bus_info, bus_info_size, "PCI:%s", dev_name(dev)); +} + #endif |