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.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
drivers/gpu/vga/vga_switcheroo.c | 13 +++++++++++++
include/linux/vga_switcheroo.h | 9 +++++++++
2 files changed, 22 insertions(+)
diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index 38f9534..eb4f64f 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -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;
diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h
index b455c7c..661fb7a 100644
--- a/include/linux/vga_switcheroo.h
+++ b/include/linux/vga_switcheroo.h
@@ -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 +67,9 @@ 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
--
1.7.10.4
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