From: Seth Forshee <seth.forshee@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxx>
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
---
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 0d3ac20..620c4ac 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -209,6 +209,20 @@ 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 2fef78b..c81a686 100644
--- a/include/linux/vga_switcheroo.h
+++ b/include/linux/vga_switcheroo.h
@@ -62,6 +62,7 @@ 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);
void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic);
@@ -82,6 +83,7 @@ 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; }
static inline void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic) {}
--
1.8.5.2 (Apple Git-48)
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