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drm/radeon/kms: fix DP after DPMS cycle 

The transmitter needs to be enabled before the link is trained.

Reported-By: Lars Doelle <lars.doelle@on-line.de>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2010-06-10 17:06:01 -04:00 committed by Dave Airlie
parent 09bdf591f4
commit a5f798ce2b
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/radeon/radeon_encoders.c
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@ -1072,6 +1072,8 @@ radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode)
if (is_dig) {
switch (mode) {
case DRM_MODE_DPMS_ON:
if (!ASIC_IS_DCE4(rdev))
atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE_OUTPUT, 0, 0);
if (atombios_get_encoder_mode(encoder) == ATOM_ENCODER_MODE_DP) {
struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);
@ -1079,8 +1081,6 @@ 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 (!ASIC_IS_DCE4(rdev))
atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE_OUTPUT, 0, 0);
break;
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_SUSPEND: