Commit a6679cf9 authored Jul 27, 2020 by Xiaowen Wu Committed by Gerrit - the friendly Code Review server Sep 10, 2020

disp: msm: dp: fix dp-mst stream double disabled issue



There is a corner case when dp-mst stream is disabled twice:

1. stream 1 is enabled
2. cable plugged out, stream 1 is disabled by kernel
3. cable plugged in, enable stream 0 first
4. disable stream 1

Stream 1 is double disabled and will cause hw crash. This change
will add the check and skip stream_off if already disabled.

Change-Id: Icd1e815a1ed14cd4e784924f3db19b98eb06d571
Signed-off-by: Xiaowen Wu <wxiaowen@codeaurora.org>
Signed-off-by: Sankeerth Billakanti <sbillaka@codeaurora.org>

parent 3c3bfb63

msm/dp/dp_display.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -1167,6 +1167,12 @@ static void dp_display_stream_disable(struct dp_display_private *dp,
		return;
		}

		if (dp_panel->stream_id == DP_STREAM_MAX \|\|
		!dp->active_panels[dp_panel->stream_id]) {
		DP_ERR("panel is already disabled\n");
		return;
		}

		DP_DEBUG("stream_id=%d, active_stream_cnt=%d\n",
		dp_panel->stream_id, dp->active_stream_cnt);