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msm: mdss: dp: avoid aux transactions if dp cable is disconnected

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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>
This commit is contained in:
Narender Ankam 2017-07-13 13:21:02 +05:30
parent 0d2bf7e895
commit fd68f1b43f
1 changed files with 10 additions and 0 deletions
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10
drivers/video/fbdev/msm/mdss_dp_aux.c
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@ -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),