[ALSA] Add PCI quirk list helper function (d9ea472c) · Commits · 戴 / test

include/sound/core.h

+25 −0

Original line number	Diff line number	Diff line
		@@ -427,4 +427,29 @@ void snd_verbose_printd(const char file, int line, const char format, ...)
		#endif
		#endif

		/* PCI quirk list helper */
		struct snd_pci_quirk {
		unsigned short subvendor; /* PCI subvendor ID */
		unsigned short subdevice; /* PCI subdevice ID */
		int value; /* value */
		#ifdef CONFIG_SND_DEBUG_DETECT
		const char name; / name of the device (optional) */
		#endif
		};

		#define _SND_PCI_QUIRK_ID(vend,dev) \
		.subvendor = (vend), .subdevice = (dev)
		#define SND_PCI_QUIRK_ID(vend,dev) {_SND_PCI_QUIRK_ID(vend, dev)}
		#ifdef CONFIG_SND_DEBUG_DETECT
		#define SND_PCI_QUIRK(vend,dev,xname,val) \
		{_SND_PCI_QUIRK_ID(vend, dev), .value = (val), .name = (xname)}
		#else
		#define SND_PCI_QUIRK(vend,dev,xname,val) \
		{_SND_PCI_QUIRK_ID(vend, dev), .value = (val)}
		#endif

		const struct snd_pci_quirk *
		snd_pci_quirk_lookup(struct pci_dev pci, const struct snd_pci_quirk list);


		#endif /* __SOUND_CORE_H */

+28 −0

Original line number	Diff line number	Diff line
		@@ -78,3 +78,31 @@ void snd_verbose_printd(const char file, int line, const char format, ...)

		EXPORT_SYMBOL(snd_verbose_printd);
		#endif

		#ifdef CONFIG_PCI
		#include <linux/pci.h>
		/**
		* snd_pci_quirk_lookup - look up a PCI SSID quirk list
		* @pci: pci_dev handle
		* @list: quirk list, terminated by a null entry
		*
		* Look through the given quirk list and finds a matching entry
		* with the same PCI SSID. When subdevice is 0, all subdevice
		* values may match.
		*
		* Returns the matched entry pointer, or NULL if nothing matched.
		*/
		const struct snd_pci_quirk *
		snd_pci_quirk_lookup(struct pci_dev pci, const struct snd_pci_quirk list)
		{
		const struct snd_pci_quirk *q;

		for (q = list; q->subvendor; q++)
		if (q->subvendor == pci->subsystem_vendor &&
		(!q->subdevice \|\| q->subdevice == pci->subsystem_device))
		return q;
		return NULL;
		}

		EXPORT_SYMBOL(snd_pci_quirk_lookup);
		#endif