[PATCH 2/4] drm: Add restore_fbdev_mode() hook to drm_fb_helper

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Add an optional driver specific restore_fbdev_mode() hook to
drm_fb_helper. If the driver doesn't provide the hook,
drm_fb_helper_restore_fbdev_mode() is called directly as before.

In this hook the driver can disable additional planes, cursors etc.
that shouldn't be visible while fbdev is in control.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/drm_fb_helper.c |    5 ++++-
 include/drm/drm_fb_helper.h     |    1 +
 2 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 5683b7f..5cfc7dd 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -248,7 +248,10 @@ bool drm_fb_helper_force_kernel_mode(void)
 		if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 			continue;
 
-		ret = drm_fb_helper_restore_fbdev_mode(helper);
+		if (helper->funcs->restore_fbdev_mode)
+			ret = helper->funcs->restore_fbdev_mode(helper);
+		else
+			ret = drm_fb_helper_restore_fbdev_mode(helper);
 		if (ret)
 			error = true;
 	}
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 5120b01..7f76e9c 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -56,6 +56,7 @@ struct drm_fb_helper_funcs {
 
 	int (*fb_probe)(struct drm_fb_helper *helper,
 			struct drm_fb_helper_surface_size *sizes);
+	int (*restore_fbdev_mode)(struct drm_fb_helper *helper);
 };
 
 struct drm_fb_helper_connector {
-- 
1.7.3.4