[PATCH v5 11/13] drm/panel: st7703: Assert reset prior to powering down the regulators
From: Ondrej Jirman <hidden>
Date: 2020-06-26 00:56:22
Also in:
dri-devel, linux-arm-kernel, lkml
Subsystem:
drm driver for sitronix st7703 panels, drm drivers, drm drivers and misc gpu patches, drm panel drivers, the rest · Maintainers:
Guido Günther, David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Neil Armstrong, Linus Torvalds
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 <redacted> --- 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 e771281eb547..92930e127559 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c@@ -416,6 +416,7 @@ 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