This patch may help with DP issues on pre-evergreen cards as well since you're supposed to turn the DP VID stream on after you do link training.
Alex
>From 091fdd6e5f236e2112201d3be5287476866e7492 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeuc...@gmail.com>
Date: Wed, 31 Mar 2010 14:42:11 -0400
Subject: [PATCH] drm/radeon/kms/evergreen: get DP working
Need to enable the VID stream after link training
Signed-off-by: Alex Deucher <alexdeuc...@gmail.com>
---
drivers/gpu/drm/radeon/radeon_encoders.c | 15 ++++++++++++---
1 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c
b/drivers/gpu/drm/radeon/radeon_encoders.c
index cbc6fa2..52d6f96 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -1044,16 +1044,25 @@ radeon_atom_encoder_dpms(struct drm_encoder
*encoder, int mode)
if (is_dig) {
switch (mode) {
case DRM_MODE_DPMS_ON:
- 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);
+
dp_link_train(encoder, connector);
+ 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:
case DRM_MODE_DPMS_OFF:
- atombios_dig_transmitter_setup(encoder,
ATOM_TRANSMITTER_ACTION_DISABLE_OUTPUT, 0, 0);
+ if (!ASIC_IS_DCE4(rdev))
+ atombios_dig_transmitter_setup(encoder,
ATOM_TRANSMITTER_ACTION_DISABLE_OUTPUT, 0, 0);
+ if (atombios_get_encoder_mode(encoder) ==
ATOM_ENCODER_MODE_DP) {
+ if (ASIC_IS_DCE4(rdev))
+ atombios_dig_encoder_setup(encoder,
ATOM_ENCODER_CMD_DP_VIDEO_OFF);
+ }
break;
}
} else {
--
1.5.6.3
0001-drm-radeon-kms-evergreen-get-DP-working.patch
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