[ALSA] Add PCI quirk list helper function

Added a helper function snd_pci_quirk_lookup()
to look up PCI SSID quirk list.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 25 insertions, 0 deletions

diff --git a/include/sound/core.h b/include/sound/core.h
index 506aa9f1e20f..3c493ad620d1 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -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 */