Commit 78a171e5 authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
Browse files

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: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent db1fa290

include/media/media-device.h

+26 −3
Original line number Diff line number Diff line
@@ -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