4 files changed, 14 insertions, 4 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
index 5ce13b8fbe6c..806cbcc94fdd 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -32,8 +32,6 @@
 
 extern int atom_debug;
 
-#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
-
 static u8
 radeon_atom_get_backlight_level_from_reg(struct radeon_device *rdev)
 {
@@ -134,6 +132,8 @@ atombios_set_backlight_level(struct radeon_encoder *radeon_encoder, u8 level)
 	}
 }
 
+#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
+
 static u8 radeon_atom_bl_level(struct backlight_device *bd)
 {
 	u8 level;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 6fca11c64dcd..64a42647f08a 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1282,6 +1282,13 @@ int radeon_resume_kms(struct drm_device *dev)
 	if (rdev->is_atom_bios) {
 		radeon_atom_encoder_init(rdev);
 		radeon_atom_disp_eng_pll_init(rdev);
+		/* turn on the BL */
+		if (rdev->mode_info.bl_encoder) {
+			u8 bl_level = radeon_get_backlight_level(rdev,
+								 rdev->mode_info.bl_encoder);
+			radeon_set_backlight_level(rdev, rdev->mode_info.bl_encoder,
+						   bl_level);
+		}
 	}
 	/* reset hpd state */
 	radeon_hpd_init(rdev);
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index 93b0d64b3f6d..e66c807df9e6 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -179,6 +179,7 @@ radeon_link_encoder_connector(struct drm_device *dev)
 						radeon_atom_backlight_init(radeon_encoder, connector);
 					else
 						radeon_legacy_backlight_init(radeon_encoder, connector);
+					rdev->mode_info.bl_encoder = radeon_encoder;
 				}
 			}
 		}
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 917d02750cf7..527761801590 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -254,12 +254,14 @@ struct radeon_mode_info {
 	struct radeon_fbdev *rfbdev;
 	/* firmware flags */
 	u16 firmware_flags;
+	/* pointer to backlight encoder */
+	struct radeon_encoder *bl_encoder;
 };
 
-#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
-
 #define RADEON_MAX_BL_LEVEL 0xFF
 
+#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
+
 struct radeon_backlight_privdata {
 	struct radeon_encoder *encoder;
 	uint8_t negative;