diff options
| author | Narender Ankam <nankam@codeaurora.org> | 2017-07-13 13:21:02 +0530 |
|---|---|---|
| committer | Narender Ankam <nankam@codeaurora.org> | 2017-07-13 13:34:26 +0530 |
| commit | fd68f1b43f6d1a63bb304ea4c6829e99a7559330 (patch) | |
| tree | 0b973eb2762c0af1e7c25f7db7a737f3655bebfc /drivers/video/fbdev | |
| parent | 0d2bf7e89532535858e8f6e0eb628c953d9192ad (diff) | |
msm: mdss: dp: avoid aux transactions if dp cable is disconnected
There might be cases where DP cable can be disconnected while
read/write aux transactions are in progress. Avoid retrying
aux transactions if DP cable is disconnected.
Change-Id: Ie6f884c047c6ef3a1584160820e6d41ec0b1e01b
Signed-off-by: Narender Ankam <nankam@codeaurora.org>
Diffstat (limited to 'drivers/video/fbdev')
| -rw-r--r-- | drivers/video/fbdev/msm/mdss_dp_aux.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/video/fbdev/msm/mdss_dp_aux.c b/drivers/video/fbdev/msm/mdss_dp_aux.c index 23a63121b78c..786fe10055da 100644 --- a/drivers/video/fbdev/msm/mdss_dp_aux.c +++ b/drivers/video/fbdev/msm/mdss_dp_aux.c @@ -395,6 +395,7 @@ static int dp_aux_rw_cmds_retry(struct mdss_dp_drv_pdata *dp, int i; u32 aux_cfg1_config_count; int ret; + bool connected = false; aux_cfg1_config_count = mdss_dp_phy_aux_get_config_cnt(dp, PHY_AUX_CFG1); @@ -404,6 +405,15 @@ retry: do { struct edp_cmd cmd1 = *cmd; + mutex_lock(&dp->attention_lock); + connected = dp->cable_connected; + mutex_unlock(&dp->attention_lock); + + if (!connected) { + pr_err("dp cable disconnected\n"); + break; + } + dp->aux_error_num = EDP_AUX_ERR_NONE; pr_debug("Trying %s, iteration count: %d\n", mdss_dp_aux_transaction_to_string(transaction), |