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Commit 2da35193 authored by Tomi Valkeinen's avatar Tomi Valkeinen
Browse files

OMAPDSS: panel-dvi: add PD gpio handling 



The driver for the TFP410 chip should handle the power-down signal of
the chip, instead of the current way of handling it in the board files.

This patch adds power_down_gpio into the device's platform data, and
adds the necessary code in the driver to request and handle the GPIO.

Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent 66f75a5d

drivers/video/omap2/displays/panel-dvi.c

+31 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/slab.h>

#include <video/omapdss.h>

#include <linux/i2c.h>

#include <linux/gpio.h>

#include <drm/drm_edid.h>



#include <video/omap-panel-dvi.h>
@@ -44,6 +45,8 @@ struct panel_drv_data { 
	struct omap_dss_device *dssdev;



	struct mutex lock;



	int pd_gpio;

};



static inline struct panel_dvi_platform_data
@@ -54,6 +57,7 @@ static inline struct panel_dvi_platform_data 


static int panel_dvi_power_on(struct omap_dss_device *dssdev)

{

	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);

	struct panel_dvi_platform_data *pdata = get_pdata(dssdev);

	int r;
@@ -70,6 +74,9 @@ static int panel_dvi_power_on(struct omap_dss_device *dssdev) 
			goto err1;

	}



	if (gpio_is_valid(ddata->pd_gpio))

		gpio_set_value(ddata->pd_gpio, 1);



	return 0;

err1:

	omapdss_dpi_display_disable(dssdev);
@@ -79,11 +86,15 @@ static int panel_dvi_power_on(struct omap_dss_device *dssdev) 


static void panel_dvi_power_off(struct omap_dss_device *dssdev)

{

	struct panel_drv_data *ddata = dev_get_drvdata(&dssdev->dev);

	struct panel_dvi_platform_data *pdata = get_pdata(dssdev);



	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)

		return;



	if (gpio_is_valid(ddata->pd_gpio))

		gpio_set_value(ddata->pd_gpio, 0);



	if (pdata->platform_disable)

		pdata->platform_disable(dssdev);
@@ -92,7 +103,9 @@ static void panel_dvi_power_off(struct omap_dss_device *dssdev) 


static int panel_dvi_probe(struct omap_dss_device *dssdev)

{

	struct panel_dvi_platform_data *pdata = get_pdata(dssdev);

	struct panel_drv_data *ddata;

	int r;



	ddata = kzalloc(sizeof(*ddata), GFP_KERNEL);

	if (!ddata)
@@ -104,6 +117,21 @@ static int panel_dvi_probe(struct omap_dss_device *dssdev) 
	ddata->dssdev = dssdev;

	mutex_init(&ddata->lock);



	if (pdata)

		ddata->pd_gpio = pdata->power_down_gpio;

	else

		ddata->pd_gpio = -1;



	if (gpio_is_valid(ddata->pd_gpio)) {

		r = gpio_request_one(ddata->pd_gpio, GPIOF_OUT_INIT_LOW,

				"tfp410 pd");

		if (r) {

			dev_err(&dssdev->dev, "Failed to request PD GPIO %d\n",

					ddata->pd_gpio);

			ddata->pd_gpio = -1;

		}

	}



	dev_set_drvdata(&dssdev->dev, ddata);



	return 0;
@@ -115,6 +143,9 @@ static void __exit panel_dvi_remove(struct omap_dss_device *dssdev) 


	mutex_lock(&ddata->lock);



	if (gpio_is_valid(ddata->pd_gpio))

		gpio_free(ddata->pd_gpio);



	dev_set_drvdata(&dssdev->dev, NULL);



	mutex_unlock(&ddata->lock);

include/video/omap-panel-dvi.h

+2 −0
Original line number Diff line number Diff line
@@ -27,11 +27,13 @@ struct omap_dss_device; 
 * @platform_enable: platform specific panel enable function

 * @platform_disable: platform specific panel disable function

 * @i2c_bus_num: i2c bus id for the panel

 * @power_down_gpio: gpio number for PD pin (or -1 if not available)

 */

struct panel_dvi_platform_data {

	int (*platform_enable)(struct omap_dss_device *dssdev);

	void (*platform_disable)(struct omap_dss_device *dssdev);

	u16 i2c_bus_num;

	int power_down_gpio;

};



#endif /* __OMAP_PANEL_DVI_H */