drm/radeon/kms: rewrite DP handling

- reorganize the functions based on use
- clean up function naming
- rework link training to better match what we use internally
- add initial support for DP 1.2 (no MST yet)

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

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index 11d7b33472d..73efb4e0b8c 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -1417,7 +1417,9 @@ radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode)
                                                                      ATOM_TRANSMITTER_ACTION_POWER_ON);
                                         radeon_dig_connector->edp_on = true;
                                 }
-                                dp_link_train(encoder, connector);
+                                if (ASIC_IS_DCE4(rdev))
+                                        atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_OFF, 0);
+                                radeon_dp_link_train(encoder, connector);
                                 if (ASIC_IS_DCE4(rdev))
                                         atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0);
                         }