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Commit e2513b3f authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Tomi Valkeinen
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drm/omap: panel-dpi: make (limited) use of a reset gpio 



Some displays have a reset input. To assert that the display is
functional the reset gpio must be deasserted.

Teach the driver to get and drive such a gpio accordingly.

Reviewed-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent 24fe2386

drivers/gpu/drm/omapdrm/displays/panel-dpi.c

+10 −0
Original line number Diff line number Diff line
@@ -213,6 +213,16 @@ static int panel_dpi_probe_of(struct platform_device *pdev) 


	ddata->enable_gpio = gpio;



	/*

	 * Many different panels are supported by this driver and there are

	 * probably very different needs for their reset pins in regards to

	 * timing and order relative to the enable gpio. So for now it's just

	 * ensured that the reset line isn't active.

	 */

	gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);

	if (IS_ERR(gpio))

		return PTR_ERR(gpio);



	ddata->backlight_gpio = -ENOENT;



	r = of_get_display_timing(node, "panel-timing", &timing);