linux-kernel - [PATCH v1] drm/bridge: it6505: update usleep

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Date: Tue, 4 Jun 2024 10:44:05 +0800
From: kuro <kuro.chung@....com.tw>
To: Pin-yen Lin <treapking@...omium.org>,
        Kenneth Haung
	<kenneth.hung@....com.tw>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil
 Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman
	<jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Maarten
 Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard
	<mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie
	<airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
CC: Kuro Chung <kuro.chung@....com.tw>, Hermes Wu <hermes.wu@....com.tw>
Subject: [PATCH v1] drm/bridge: it6505: update usleep_range for RC circuit charge time

From: Kuro Chung <kuro.chung@....com.tw>

The spec of timing between IVDD/OVDD and SYSRTEN is 10ms, but SYSRSTN RC
circuit need at least 25ms for rising time, update for match spec

Signed-off-by: Kuro Chung <kuro.chung@....com.tw>
Signed-off-by: Hermes Wu <hermes.wu@....com.tw>
---
 drivers/gpu/drm/bridge/ite-it6505.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index cd1b5057ddfb4..1e1c06fdf2064 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -2615,7 +2615,7 @@ static int it6505_poweron(struct it6505 *it6505)
 		gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
 		usleep_range(1000, 2000);
 		gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
-		usleep_range(10000, 20000);
+		usleep_range(25000, 35000);
 	}
 
 	it6505->powered = true;
-- 
2.25.1