[PATCH 4.9 31/38] drm/panel: simple: Add missing panel_simple_unprepare() calls

Greg Kroah-Hartman
2017-12-04T16:32:21Z

From: Jonathan Liu <net147@gmail.com>

commit f3621a8eb59a913612c8e6e37d81f16b649f8b6c upstream.

During panel removal or system shutdown panel_simple_disable() is called
which disables the panel backlight but the panel is still powered due to
missing calls to panel_simple_unprepare().

Fixes: d02fd93e2cd8 ("drm/panel: simple - Disable panel on shutdown")
Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170807115545.27747-1-net147@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/panel/panel-simple.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -369,6 +369,7 @@ static int panel_simple_remove(struct de
drm_panel_remove(&panel->base);

panel_simple_disable(&panel->base);
+ panel_simple_unprepare(&panel->base);

if (panel->ddc)
put_device(&panel->ddc->dev);
@@ -384,6 +385,7 @@ static void panel_simple_shutdown(struct
struct panel_simple *panel = dev_get_drvdata(dev);

panel_simple_disable(&panel->base);
+ panel_simple_unprepare(&panel->base);
}

static const struct drm_display_mode ampire_am800480r3tmqwa1h_mode = {