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Subject[ 063/109] drm/radeon: fix dpms on/off on trinity/aruba v2
Date
From: Greg KH <gregkh@linuxfoundation.org>

3.4-stable review patch. If anyone has any objections, please let me know.

------------------
From: Jerome Glisse <jglisse@redhat.com>

commit fcedac670c3da0d17aaa5db1708694971e8024a9 upstream.

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.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/radeon/atombios_encoders.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
--- 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_
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,



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