drm/radeon/kms: turn the backlight off explicitly for dpms

Seems some newer systems require this explicitly.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index f678257..d55cb58 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -1086,6 +1086,8 @@ radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode)
                                if (ASIC_IS_DCE4(rdev))
                                        atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_ON);
                        }
+                       if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT))
+                               atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_LCD_BLON, 0, 0);
                        break;
                case DRM_MODE_DPMS_STANDBY:
                case DRM_MODE_DPMS_SUSPEND:
@@ -1095,20 +1097,31 @@ radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode)
                                if (ASIC_IS_DCE4(rdev))
                                        atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_OFF);
                        }
+                       if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT))
+                               atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_LCD_BLOFF, 0, 0);
                        break;
                }
        } else {
                switch (mode) {
                case DRM_MODE_DPMS_ON:
                        args.ucAction = ATOM_ENABLE;
+                       atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+                       if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
+                               args.ucAction = ATOM_LCD_BLON;
+                               atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+                       }
                        break;
                case DRM_MODE_DPMS_STANDBY:
                case DRM_MODE_DPMS_SUSPEND:
                case DRM_MODE_DPMS_OFF:
                        args.ucAction = ATOM_DISABLE;
+                       atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+                       if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
+                               args.ucAction = ATOM_LCD_BLOFF;
+                               atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+                       }
                        break;
                }
-               atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
        }
        radeon_atombios_encoder_dpms_scratch_regs(encoder, (mode == DRM_MODE_DPMS_ON) ? true : false);