From: Jerome Glisse <jglisse@xxxxxxxxxx>
The external encoder need to be setup again before enabling the
transmiter. This seems to be only needed on some trinity/aruba
to fix dpms on.
v2: Add comment, only setup again on dce6 ie aruba or newer.
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Jerome Glisse <jglisse@xxxxxxxxxx>
---
drivers/gpu/drm/radeon/atombios_encoders.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
index 486ccdf..8676b1b 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -1392,10 +1392,18 @@ radeon_atom_encoder_dpms_dig(struct drm_encoder *encoder, int mode)
case DRM_MODE_DPMS_ON:
/* some early dce3.2 boards have a bug in their transmitter control table */
if ((rdev->family == CHIP_RV710) || (rdev->family == CHIP_RV730) ||
- ASIC_IS_DCE41(rdev) || ASIC_IS_DCE5(rdev))
+ ASIC_IS_DCE41(rdev) || ASIC_IS_DCE5(rdev)) {
+ if (ASIC_IS_DCE6(rdev)) {
+ /* It seems we need to call ATOM_ENCODER_CMD_SETUP again
+ * before reenabling encoder on DPMS ON, otherwise we never
+ * get picture
+ */
+ atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_SETUP, 0);
+ }
atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE, 0, 0);
- else
+ } else {
atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE_OUTPUT, 0, 0);
+ }
if (ENCODER_MODE_IS_DP(atombios_get_encoder_mode(encoder)) && connector) {
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
atombios_set_edp_panel_power(connector,
--
1.7.10.4
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