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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: Tomi Valkeinen <tomi.valkeinen@ti.com>
hifive-unleashed-5.1
Tomi Valkeinen 2011-12-22 10:37:33 +02:00
parent 66f75a5d02
commit 2da35193dc
2 changed files with 33 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/video/omap2/displays/panel-dvi.c
View File

@ -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 @@ err0:
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);

2
include/video/omap-panel-dvi.h
View File

@ -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 */