linux-kernel - [PATCH 2/8] drm/panel: boe-tv101wum-nl6: If prepare fails, disable GPIO before regulators

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Message-ID: <20240517143643.2.Ieac346cd0f1606948ba39ceea06b55359fe972b6@changeid>
Date: Fri, 17 May 2024 14:36:37 -0700
From: Douglas Anderson <dianders@...omium.org>
To: Neil Armstrong <neil.armstrong@...aro.org>,
	Jessica Zhang <quic_jesszhan@...cinc.com>,
	Sam Ravnborg <sam@...nborg.org>
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	Douglas Anderson <dianders@...omium.org>,
	Daniel Vetter <daniel@...ll.ch>,
	David Airlie <airlied@...il.com>,
	Jitao Shi <jitao.shi@...iatek.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/8] drm/panel: boe-tv101wum-nl6: If prepare fails, disable GPIO before regulators

The enable GPIO should clearly be set low before turning off
regulators. That matches both the inverse order that things were
enabled and also the order in unprepare().

Fixes: a869b9db7adf ("drm/panel: support for boe tv101wum-nl6 wuxga dsi video mode panel")
Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
index 8e839a1749e4..028625d2d37d 100644
--- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
+++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
@@ -1475,13 +1475,13 @@ static int boe_panel_prepare(struct drm_panel *panel)
 	return 0;
 
 poweroff:
+	gpiod_set_value(boe->enable_gpio, 0);
 	regulator_disable(boe->avee);
 poweroffavdd:
 	regulator_disable(boe->avdd);
 poweroff1v8:
 	usleep_range(5000, 7000);
 	regulator_disable(boe->pp1800);
-	gpiod_set_value(boe->enable_gpio, 0);
 
 	return ret;
 }
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog