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Message-ID: <20230911090206.3121440-5-contact@jookia.org>
Date: Mon, 11 Sep 2023 19:02:02 +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 4/8] drm/panel: nv3052c: Wait before entering sleep mode
The panel needs us to wait 120ms between exiting and entering sleep.
Guarantee that by always waiting 150ms before entering sleep mode.
Signed-off-by: John Watts <contact@...kia.org>
---
drivers/gpu/drm/panel/panel-newvision-nv3052c.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-newvision-nv3052c.c b/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
index 2526b123b1f5..307335d0f1fc 100644
--- a/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
+++ b/drivers/gpu/drm/panel/panel-newvision-nv3052c.c
@@ -289,6 +289,9 @@ static int nv3052c_unprepare(struct drm_panel *panel)
struct mipi_dbi *dbi = &priv->dbi;
int err;
+ /* Wait 150ms in case we just exited sleep mode */
+ msleep(150);
+
err = mipi_dbi_command(dbi, MIPI_DCS_ENTER_SLEEP_MODE);
if (err)
dev_err(priv->dev, "Unable to enter sleep mode: %d\n", err);
--
2.42.0
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