Add vga_switcheroo_get_active_client() to allow drivers to get the active video client. This will be used by drivers wishing to temporarily mux only the DDC to the inactive client.
Signed-off-by: Seth Forshee seth.forshee@canonical.com --- drivers/gpu/vga/vga_switcheroo.c | 14 ++++++++++++++ include/linux/vga_switcheroo.h | 2 ++ 2 files changed, 16 insertions(+)
diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c index ea6bcc2..e53f67d 100644 --- a/drivers/gpu/vga/vga_switcheroo.c +++ b/drivers/gpu/vga/vga_switcheroo.c @@ -205,6 +205,20 @@ find_active_client(struct list_head *head) return NULL; }
+struct pci_dev *vga_switcheroo_get_active_client(void) +{ + struct vga_switcheroo_client *client; + struct pci_dev *pdev = NULL; + + mutex_lock(&vgasr_mutex); + client = find_active_client(&vgasr_priv.clients); + if (client) + pdev = client->pdev; + mutex_unlock(&vgasr_mutex); + return pdev; +} +EXPORT_SYMBOL(vga_switcheroo_get_active_client); + int vga_switcheroo_get_client_state(struct pci_dev *pdev) { struct vga_switcheroo_client *client; diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h index b0d0839..e361858 100644 --- a/include/linux/vga_switcheroo.h +++ b/include/linux/vga_switcheroo.h @@ -61,6 +61,7 @@ void vga_switcheroo_unregister_handler(void);
int vga_switcheroo_process_delayed_switch(void);
+struct pci_dev *vga_switcheroo_get_active_client(void); int vga_switcheroo_get_client_state(struct pci_dev *dev);
#else @@ -76,6 +77,7 @@ 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 struct pci_dev *vga_switcheroo_get_active_client(void) { return NULL; } static inline int vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_ON; }