commit: 5a96a899bbdee86024ab9ea6d02b9e242faacbed
From: Jerome Glisse <jgli...@redhat.com>
Date: Mon, 25 Jul 2011 11:57:43 -0400
Subject: [PATCH] drm/radeon/kms: fix DP training for DPEncoderService
revision bigger than 1.1
DPEncoderService newer than 1.1 can't properly program the DP (display port)
link training. When facing such version use the DIGxEncoderControl method
instead. Fix DP link training on some R7XX.
Signed-off-by: Jerome Glisse <jgli...@redhat.com>
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
Cc: sta...@kernel.org
Signed-off-by: Dave Airlie <airl...@redhat.com>
---
drivers/gpu/drm/radeon/atombios_dp.c | 22 ++++++++++++++++++----
1 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c
b/drivers/gpu/drm/radeon/atombios_dp.c
index 8c0f9e3..645b84b 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -627,6 +627,7 @@ struct radeon_dp_link_train_info {
u8 train_set[4];
u8 link_status[DP_LINK_STATUS_SIZE];
u8 tries;
+ bool use_dpencoder;
};
static void radeon_dp_update_vs_emph(struct radeon_dp_link_train_info *dp_info)
@@ -646,7 +647,7 @@ static void radeon_dp_set_tp(struct
radeon_dp_link_train_info *dp_info, int tp)
int rtp = 0;
/* set training pattern on the source */
- if (ASIC_IS_DCE4(dp_info->rdev)) {
+ if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder) {
switch (tp) {
case DP_TRAINING_PATTERN_1:
rtp = ATOM_ENCODER_CMD_DP_LINK_TRAINING_PATTERN1;
@@ -706,7 +707,7 @@ static int radeon_dp_link_train_init(struct
radeon_dp_link_train_info *dp_info)
radeon_write_dpcd_reg(dp_info->radeon_connector, DP_LINK_BW_SET, tmp);
/* start training on the source */
- if (ASIC_IS_DCE4(dp_info->rdev))
+ if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder)
atombios_dig_encoder_setup(dp_info->encoder,
ATOM_ENCODER_CMD_DP_LINK_TRAINING_START, 0);
else
@@ -731,7 +732,7 @@ static int radeon_dp_link_train_finish(struct
radeon_dp_link_train_info *dp_info
DP_TRAINING_PATTERN_DISABLE);
/* disable the training pattern on the source */
- if (ASIC_IS_DCE4(dp_info->rdev))
+ if (ASIC_IS_DCE4(dp_info->rdev) || !dp_info->use_dpencoder)
atombios_dig_encoder_setup(dp_info->encoder,
ATOM_ENCODER_CMD_DP_LINK_TRAINING_COMPLETE, 0);
else
@@ -869,7 +870,8 @@ void radeon_dp_link_train(struct drm_encoder *encoder,
struct radeon_connector *radeon_connector;
struct radeon_connector_atom_dig *dig_connector;
struct radeon_dp_link_train_info dp_info;
- u8 tmp;
+ int index;
+ u8 tmp, frev, crev;
if (!radeon_encoder->enc_priv)
return;
@@ -884,6 +886,18 @@ void radeon_dp_link_train(struct drm_encoder *encoder,
(dig_connector->dp_sink_type != CONNECTOR_OBJECT_ID_eDP))
return;
+ /* DPEncoderService newer than 1.1 can't program properly the
+ * training pattern. When facing such version use the
+ * DIGXEncoderControl (X== 1 | 2)
+ */
+ dp_info.use_dpencoder = true;
+ index = GetIndexIntoMasterTable(COMMAND, DPEncoderService);
+ if (atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
&crev)) {
+ if (crev > 1) {
+ dp_info.use_dpencoder = false;
+ }
+ }
+
dp_info.enc_id = 0;
if (dig->dig_encoder)
dp_info.enc_id |= ATOM_DP_CONFIG_DIG2_ENCODER;
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