drm: move i915_kick_out_vgacon to vgaarb

Also rename it to vga_remove_vgacon and add kerneldoc text.

Signed-off-by: Gerd Hoffmann <[e-mail]>
Reviewed-by: Daniel Vetter <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/i915_drv.c

···
 	return ret;
 }
 
-#if !defined(CONFIG_VGA_CONSOLE)
-static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
-{
-	return 0;
-}
-#elif !defined(CONFIG_DUMMY_CONSOLE)
-static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
-{
-	return -ENODEV;
-}
-#else
-static int i915_kick_out_vgacon(struct drm_i915_private *dev_priv)
-{
-	int ret = 0;
-
-	DRM_INFO("Replacing VGA console driver\n");
-
-	console_lock();
-	if (con_is_bound(&vga_con))
-		ret = do_take_over_console(&dummy_con, 0, MAX_NR_CONSOLES - 1, 1);
-	if (ret == 0) {
-		ret = do_unregister_con_driver(&vga_con);
-
-		/* Ignore "already unregistered". */
-		if (ret == -ENODEV)
-			ret = 0;
-	}
-	console_unlock();
-
-	return ret;
-}
-#endif
-
 static void intel_init_dpio(struct drm_i915_private *dev_priv)
 {
 	/*
···
 		goto err_ggtt;
 	}
 
-	ret = i915_kick_out_vgacon(dev_priv);
+	ret = vga_remove_vgacon(pdev);
 	if (ret) {
 		DRM_ERROR("failed to remove conflicting VGA console\n");
 		goto err_ggtt;

drivers/gpu/vga/vgaarb.c

···
 #include <linux/miscdevice.h>
 #include <linux/slab.h>
 #include <linux/screen_info.h>
+#include <linux/vt.h>
+#include <linux/console.h>
 
 #include <linux/uaccess.h>
 
···
 	pci_dev_put(vga_default);
 	vga_default = pci_dev_get(pdev);
 }
+
+/**
+ * vga_remove_vgacon - deactivete vga console
+ *
+ * Unbind and unregister vgacon in case pdev is the default vga
+ * device.  Can be called by gpu drivers on initialization to make
+ * sure vga register access done by vgacon will not disturb the
+ * device.
+ *
+ * @pdev: pci device.
+ */
+#if !defined(CONFIG_VGA_CONSOLE)
+int vga_remove_vgacon(struct pci_dev *pdev)
+{
+	return 0;
+}
+#elif !defined(CONFIG_DUMMY_CONSOLE)
+int vga_remove_vgacon(struct pci_dev *pdev)
+{
+	return -ENODEV;
+}
+#else
+int vga_remove_vgacon(struct pci_dev *pdev)
+{
+	int ret = 0;
+
+	if (pdev != vga_default)
+		return 0;
+	vgaarb_info(&pdev->dev, "deactivate vga console\n");
+
+	console_lock();
+	if (con_is_bound(&vga_con))
+		ret = do_take_over_console(&dummy_con, 0,
+					   MAX_NR_CONSOLES - 1, 1);
+	if (ret == 0) {
+		ret = do_unregister_con_driver(&vga_con);
+
+		/* Ignore "already unregistered". */
+		if (ret == -ENODEV)
+			ret = 0;
+	}
+	console_unlock();
+
+	return ret;
+}
+#endif
+EXPORT_SYMBOL(vga_remove_vgacon);
 
 static inline void vga_irq_set_state(struct vga_device *vgadev, bool state)
 {

include/linux/vgaarb.h

···
 #ifdef CONFIG_VGA_ARB
 extern struct pci_dev *vga_default_device(void);
 extern void vga_set_default_device(struct pci_dev *pdev);
+extern int vga_remove_vgacon(struct pci_dev *pdev);
 #else
 static inline struct pci_dev *vga_default_device(void) { return NULL; };
 static inline void vga_set_default_device(struct pci_dev *pdev) { };
+static inline int vga_remove_vgacon(struct pci_dev *pdev) { return 0; };
 #endif
 
 /*