Merge branch 'fix/rt5645' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...

[cascardo/linux.git] / include / linux / vga_switcheroo.h

diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h
index 3764991..69e1d4a 100644 (file)
--- a/include/linux/vga_switcheroo.h
+++ b/include/linux/vga_switcheroo.h
@@ -39,10 +39,6 @@ struct pci_dev;
  * enum vga_switcheroo_state - client power state
  * @VGA_SWITCHEROO_OFF: off
  * @VGA_SWITCHEROO_ON: on
- * @VGA_SWITCHEROO_INIT: client has registered with vga_switcheroo but
- *     vga_switcheroo is not enabled, i.e. no second client or no handler
- *     has registered. Only used in vga_switcheroo_get_client_state() which
- *     in turn is only called from hda_intel.c
  * @VGA_SWITCHEROO_NOT_FOUND: client has not registered with vga_switcheroo.
  *     Only used in vga_switcheroo_get_client_state() which in turn is only
  *     called from hda_intel.c
@@ -53,12 +49,14 @@ 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 - client identifier
+ * @VGA_SWITCHEROO_UNKNOWN_ID: initial identifier assigned to vga clients.
+ *     Determining the id requires the handler, so GPUs are given their
+ *     true id in a delayed fashion in vga_switcheroo_enable()
  * @VGA_SWITCHEROO_IGD: integrated graphics device
  * @VGA_SWITCHEROO_DIS: discrete graphics device
  * @VGA_SWITCHEROO_MAX_CLIENTS: currently no more than two GPUs are supported
@@ -66,6 +64,7 @@ enum vga_switcheroo_state {
  * Client identifier. Audio clients use the same identifier & 0x100.
  */
 enum vga_switcheroo_client_id {
+       VGA_SWITCHEROO_UNKNOWN_ID = -1,
        VGA_SWITCHEROO_IGD,
        VGA_SWITCHEROO_DIS,
        VGA_SWITCHEROO_MAX_CLIENTS,
@@ -96,7 +95,7 @@ struct vga_switcheroo_handler {
        int (*switchto)(enum vga_switcheroo_client_id id);
        int (*power_state)(enum vga_switcheroo_client_id id,
                           enum vga_switcheroo_state state);
-       int (*get_client_id)(struct pci_dev *pdev);
+       enum vga_switcheroo_client_id (*get_client_id)(struct pci_dev *pdev);
 };
 
 /**
@@ -128,17 +127,17 @@ int vga_switcheroo_register_client(struct pci_dev *dev,
                                   bool driver_power_control);
 int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
                                         const struct vga_switcheroo_client_ops *ops,
-                                        int id);
+                                        enum vga_switcheroo_client_id id);
 
 void vga_switcheroo_client_fb_set(struct pci_dev *dev,
                                  struct fb_info *info);
 
-int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
+int vga_switcheroo_register_handler(const struct vga_switcheroo_handler *handler);
 void vga_switcheroo_unregister_handler(void);
 
 int vga_switcheroo_process_delayed_switch(void);
 
-int vga_switcheroo_get_client_state(struct pci_dev *dev);
+enum vga_switcheroo_state vga_switcheroo_get_client_state(struct pci_dev *dev);
 
 void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic);
 
@@ -151,13 +150,13 @@ static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
 static inline int vga_switcheroo_register_client(struct pci_dev *dev,
                const struct vga_switcheroo_client_ops *ops, bool driver_power_control) { return 0; }
 static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
-static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
+static inline int vga_switcheroo_register_handler(const struct vga_switcheroo_handler *handler) { return 0; }
 static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
        const struct vga_switcheroo_client_ops *ops,
-       int id) { return 0; }
+       enum vga_switcheroo_client_id id) { 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_ON; }
+static inline enum vga_switcheroo_state 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) {}