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Commit fd68f1b4 authored by Narender Ankam's avatar Narender Ankam
Browse files

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: default avatarNarender Ankam <nankam@codeaurora.org>
parent 0d2bf7e8

drivers/video/fbdev/msm/mdss_dp_aux.c

+10 −0
Original line number Diff line number Diff line
@@ -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),