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Commit c8e9cf7b authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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: default avatarDave Airlie <airlied@redhat.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 8260ef07

drivers/gpu/vga/vga_switcheroo.c

+13 −0
Original line number Diff line number Diff line
@@ -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;

include/linux/vga_switcheroo.h

+7 −0
Original line number Diff line number Diff line
@@ -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