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>
diff --git a/drivers/video/omap2/displays/panel-dvi.c b/drivers/video/omap2/displays/panel-dvi.c
index 03eb14a..876b798 100644
--- a/drivers/video/omap2/displays/panel-dvi.c
+++ b/drivers/video/omap2/displays/panel-dvi.c
@@ -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 omap_dss_device *dssdev;
struct mutex lock;
+
+ int pd_gpio;
};
static inline struct panel_dvi_platform_data
@@ -54,6 +57,7 @@
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 @@
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 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 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 @@
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 @@
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);