提交 c8e9cf7b 编写于 作者: T Takashi Iwai

vga_switcheroo: Add a helper function to get the client state

Add vga_switcheroo_get_client_state() to get the current state of the
client.  This is necessary to determine the proper initial state of
audio clients in HD-audio driver.
Acked-by: NDave Airlie <airlied@redhat.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
上级 8260ef07
......@@ -190,6 +190,19 @@ find_active_client(struct list_head *head)
return NULL;
}
int vga_switcheroo_get_client_state(struct pci_dev *pdev)
{
struct vga_switcheroo_client *client;
client = find_client_from_pci(&vgasr_priv.clients, pdev);
if (!client)
return VGA_SWITCHEROO_NOT_FOUND;
if (!vgasr_priv.active)
return VGA_SWITCHEROO_INIT;
return client->pwr_state;
}
EXPORT_SYMBOL(vga_switcheroo_get_client_state);
void vga_switcheroo_unregister_client(struct pci_dev *pdev)
{
struct vga_switcheroo_client *client;
......
......@@ -12,6 +12,9 @@
enum vga_switcheroo_state {
VGA_SWITCHEROO_OFF,
VGA_SWITCHEROO_ON,
/* below are referred only from vga_switcheroo_get_client_state() */
VGA_SWITCHEROO_INIT,
VGA_SWITCHEROO_NOT_FOUND,
};
enum vga_switcheroo_client_id {
......@@ -50,6 +53,8 @@ void vga_switcheroo_unregister_handler(void);
int vga_switcheroo_process_delayed_switch(void);
int vga_switcheroo_get_client_state(struct pci_dev *dev);
#else
static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
......@@ -62,5 +67,7 @@ static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
int id, bool active) { return 0; }
static inline void vga_switcheroo_unregister_handler(void) {}
static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
static inline int vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_CLIENT_ON; }
#endif
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