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From:   Ondrej Jirman <megous@megous.com>
To:     linux-sunxi@googlegroups.com,
        Thierry Reding <thierry.reding@gmail.com>,
        Sam Ravnborg <sam@ravnborg.org>,
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        Chen-Yu Tsai <wens@csie.org>,
        Linus Walleij <linus.walleij@linaro.org>,
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Cc:     Ondrej Jirman <megous@megous.com>, dri-devel@lists.freedesktop.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
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Subject: [PATCH v7 11/13] drm/panel: st7703: Assert reset prior to powering down the regulators
Date:   Wed,  1 Jul 2020 18:29:26 +0200
Message-Id: <20200701162928.1638874-12-megous@megous.com>
In-Reply-To: <20200701162928.1638874-1-megous@megous.com>
References: <20200701162928.1638874-1-megous@megous.com>
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Sender: linux-kernel-owner@vger.kernel.org
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The reset pin is inverted, so if we don't assert reset, the actual gpio
will be high and may keep driving the IO port of the panel.

Signed-off-by: Ondrej Jirman <megous@megous.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/gpu/drm/panel/panel-sitronix-st7703.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
index 7750179bca60..8996ced2b721 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
@@ -415,6 +415,7 @@ static int st7703_unprepare(struct drm_panel *panel)
 	if (!ctx->prepared)
 		return 0;
 
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
 	regulator_disable(ctx->iovcc);
 	regulator_disable(ctx->vcc);
 	ctx->prepared = false;
-- 
2.27.0