disp: msm: dp: enable aux switch from display HPD handler

Currently, aux switch is enabled by usbpd handler before
handing over the control to dispaly HPD handler. However,
in some scenarios there is a chance that altmode would
directly call into display HPD handler bypassing the usbpd
handler. This would lead to aux errors since aux switch
is not enabled. This change will enable aux switch in
display HPD handler which would avoid the resulting aux
errors. This issue is a regression caused by this change
b6466ca7f597396cd2ecb3623d059435dfb0e4c6.

Change-Id: I425991ba95b22411740f88cba5ca2083d13969e1
Signed-off-by: Sandeep Gangadharaiah <[email protected]>

msm/dp/dp_display.c

@@ -1220,6 +1220,15 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp)
 	dp->dp_display.max_pclk_khz = min(dp->parser->max_pclk_khz,
 					dp->debug->max_pclk_khz);
 
+	if (!dp->debug->sim_mode && !dp->no_aux_switch && !dp->parser->gpio_aux_switch
+			&& dp->aux_switch_node) {
+		rc = dp->aux->aux_switch(dp->aux, true, dp->hpd->orientation);
+		if (rc) {
+			mutex_unlock(&dp->session_lock);
+			return rc;
+		}
+	}
+
 	/*
 	 * If dp video session is not restored from a previous session teardown
 	 * by userspace, ensure the host_init is executed, in such a scenario,