/*
- * vgaarb.c
+ * The VGA aribiter manages VGA space routing and VGA resource decode to
+ * allow multiple VGA devices to be used in a system in a safe way.
*
* (C) Copyright 2005 Benjamin Herrenschmidt <benh@kernel.crashing.org>
* (C) Copyright 2007 Paulo R. Zanoni <przanoni@gmail.com>
* interrupts at any time.
*/
extern void vga_set_legacy_decoding(struct pci_dev *pdev,
- unsigned int decodes);
+ unsigned int decodes);
/**
* vga_get - acquire & locks VGA resources
* They driver will get a callback when VGA arbitration is first used
* by userspace since we some older X servers have issues.
*/
+#if defined(CONFIG_VGA_ARB)
int vga_client_register(struct pci_dev *pdev, void *cookie,
void (*irq_set_state)(void *cookie, bool state),
unsigned int (*set_vga_decode)(void *cookie, bool state));
+#else
+static inline int vga_client_register(struct pci_dev *pdev, void *cookie,
+ void (*irq_set_state)(void *cookie, bool state),
+ unsigned int (*set_vga_decode)(void *cookie, bool state))
+{
+ return 0;
+}
+#endif
#endif /* LINUX_VGA_H */