From: Douglas Anderson dianders@chromium.org
[ Upstream commit f7ccbed656f78212593ca965d9a8f34bf24e0aab ]
In commit fe64ba5c6323 ("drm/rockchip: Resume DP early") we moved resume to be early but left suspend at its normal time. This seems like it could be OK, but casues problems if a suspend gets interrupted partway through. The OS only balances matching suspend/resume levels. ...so if suspend was called then resume will be called. If suspend late was called then resume early will be called. ...but if suspend was called resume early might not get called. This leads to an unbalance in the clock enables / disables.
Lets take the simple fix and just move suspend to be late to match. This makes the PM core take proper care in keeping things balanced.
Fixes: fe64ba5c6323 ("drm/rockchip: Resume DP early") Signed-off-by: Douglas Anderson dianders@chromium.org Signed-off-by: Sean Paul seanpaul@chromium.org Link: https://patchwork.freedesktop.org/patch/msgid/20190802184616.44822-1-diander... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index 080f053521950..6a4da3a0ff1c3 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -436,7 +436,7 @@ static int rockchip_dp_resume(struct device *dev)
static const struct dev_pm_ops rockchip_dp_pm_ops = { #ifdef CONFIG_PM_SLEEP - .suspend = rockchip_dp_suspend, + .suspend_late = rockchip_dp_suspend, .resume_early = rockchip_dp_resume, #endif };