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From:   John Watts <contact@jookia.org>
To:     dri-devel@lists.freedesktop.org
Cc:     Neil Armstrong <neil.armstrong@linaro.org>,
        Jessica Zhang <quic_jesszhan@quicinc.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Shawn Guo <shawnguo@kernel.org>,
        Heiko Stuebner <heiko@sntech.de>,
        Chris Morgan <macromorgan@hotmail.com>,
        Jagan Teki <jagan@edgeble.ai>, John Watts <contact@jookia.org>,
        Paul Cercueil <paul@crapouillou.net>,
        Christophe Branchereau <cbranchereau@gmail.com>,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC PATCH v2 4/9] drm/panel: nv3052c: Wait before entering sleep mode
Date:   Mon, 18 Sep 2023 22:58:48 +1000
Message-ID: <20230918125853.2249187-5-contact@jookia.org>
In-Reply-To: <20230918125853.2249187-1-contact@jookia.org>
References: <20230918125853.2249187-1-contact@jookia.org>
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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@jookia.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