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Message-ID: <20230911090206.3121440-4-contact@jookia.org>
Date: Mon, 11 Sep 2023 19:02:01 +1000
From: John Watts <contact@...kia.org>
To: dri-devel@...ts.freedesktop.org
Cc: Neil Armstrong <neil.armstrong@...aro.org>,
Sam Ravnborg <sam@...nborg.org>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Heiko Stuebner <heiko@...ech.de>,
Shawn Guo <shawnguo@...nel.org>,
Chris Morgan <macromorgan@...mail.com>,
Jagan Teki <jagan@...eble.ai>, John Watts <contact@...kia.org>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 3/8] drm/panel: nv3052c: Sleep for 150ms after reset
The current code waits after resets for 5 to 20 milliseconds.
This is appropriate when resetting a sleeping panel, but an awake panel
requires at least 120ms of waiting.
Sleep for 150ms so the panel always completes it reset properly.
Signed-off-by: John Watts <contact@...kia.org>
---
drivers/gpu/drm/panel/panel-newvision-nv3052c.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panel/panel-newvision-nv3052c.c b/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
index 90dea21f9856..2526b123b1f5 100644
--- a/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
+++ b/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
@@ -258,7 +258,7 @@ static int nv3052c_prepare(struct drm_panel *panel)
gpiod_set_value_cansleep(priv->reset_gpio, 1);
usleep_range(10, 1000);
gpiod_set_value_cansleep(priv->reset_gpio, 0);
- usleep_range(5000, 20000);
+ msleep(150);
for (i = 0; i < ARRAY_SIZE(nv3052c_panel_regs); i++) {
err = mipi_dbi_command(dbi, nv3052c_panel_regs[i].cmd,
--
2.42.0
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