diff options
| author | Ajay Singh Parmar <aparmar@codeaurora.org> | 2017-01-07 18:29:04 -0800 |
|---|---|---|
| committer | Ajay Singh Parmar <aparmar@codeaurora.org> | 2017-01-17 17:38:07 -0800 |
| commit | 4eaf19c57aed7e7a5bc0188cfe6a1169891bc828 (patch) | |
| tree | b49ef02561d372b4c78812a44f7e316cb149640b | |
| parent | 19b7c1036c992e19e6bc350f6b4cb6a795c9e2e9 (diff) | |
msm: mdss: dp: fix link training sequence
Transmit the link pattern first, update the drive settings
and then update the sink about the pattern and drive settings
using aux channel to avoid possible link training failures
with some sinks.
Change-Id: Ia8eccee99f58da94d3f1013f075c07400bde15f9
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>
| -rw-r--r-- | drivers/video/fbdev/msm/mdss_dp_aux.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/video/fbdev/msm/mdss_dp_aux.c b/drivers/video/fbdev/msm/mdss_dp_aux.c index fa1af0d392e7..83ce2384b044 100644 --- a/drivers/video/fbdev/msm/mdss_dp_aux.c +++ b/drivers/video/fbdev/msm/mdss_dp_aux.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2013, 2014, 2016 The Linux Foundation. All rights reserved. +/* Copyright (c) 2013-2014, 2016-2017 The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -1653,10 +1653,10 @@ static int dp_start_link_train_1(struct mdss_dp_drv_pdata *ep) pr_debug("Entered++"); + dp_host_train_set(ep, 0x01); /* train_1 */ dp_cap_lane_rate_set(ep); dp_train_pattern_set_write(ep, 0x21); /* train_1 */ dp_aux_set_voltage_and_pre_emphasis_lvl(ep); - dp_host_train_set(ep, 0x01); /* train_1 */ tries = 0; old_v_level = ep->v_level; @@ -1708,11 +1708,11 @@ static int dp_start_link_train_2(struct mdss_dp_drv_pdata *ep) else pattern = 0x02; + dp_host_train_set(ep, pattern); + dp_aux_set_voltage_and_pre_emphasis_lvl(ep); dp_train_pattern_set_write(ep, pattern | 0x20);/* train_2 */ do { - dp_host_train_set(ep, pattern); - usleep_time = ep->dpcd.training_read_interval; usleep_range(usleep_time, usleep_time); @@ -1723,11 +1723,11 @@ static int dp_start_link_train_2(struct mdss_dp_drv_pdata *ep) break; } - tries++; if (tries > maximum_retries) { ret = -1; break; } + tries++; dp_sink_train_set_adjust(ep); dp_aux_set_voltage_and_pre_emphasis_lvl(ep); |