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authorSakari Ailus <sakari.ailus@linux.intel.com>2022-01-22 11:25:57 +0000
committerMauro Carvalho Chehab <mchehab@kernel.org>2022-04-24 08:04:27 +0100
commit78a171e58717685ea0eb082a24bc75bd9e20518f (patch)
treebcd145a6a0de39df91259acfa524c28d205f3546 /include/media
parentdb1fa290a35b1652628ba7b921ac7ad53ce36410 (diff)
downloadlinux-78a171e58717685ea0eb082a24bc75bd9e20518f.tar.bz2
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.h29
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