linux-kernel - [PATCH] drm/msm/dp: Shorten SETUP timeout

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Date:   Mon,  4 Oct 2021 19:37:50 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Kuogee Hsieh <khsieh@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Abhinav Kumar <abhinavk@...eaurora.org>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Sankeerth Billakanti <sbillaka@...eaurora.org>
Subject: [PATCH] drm/msm/dp: Shorten SETUP timeout

Found in the middle of a patch from Sankeerth was the reduction of the
INIT_SETUP timeout from 10s to 100ms. Upon INIT_SETUP timeout the host
is initalized and HPD interrupt start to be serviced, so in the case of
eDP this reduction improves the user experience dramatically - i.e.
removes 9.9s of bland screen time at boot.

Suggested-by: Sankeerth Billakanti <sbillaka@...eaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 21b9c1de4ecb..46d9f3eb6d13 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1438,7 +1438,7 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display)
 
 	dp_hpd_event_setup(dp);
 
-	dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100);
+	dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 1);
 }
 
 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
-- 
2.29.2