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OMAP: LCD LS037V7DW01: Add Backlight driver support

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Tested on OMAP3EVM for OMAP3530 and AM/DM 3730.

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
[tomi.valkeinen@nokia.com: added slab.h include]
[tomi.valkeinen@nokia.com: added dependency to BACKLIGHT_CLASS_DEVICE]
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
This commit is contained in:
Vaibhav Hiremath 2010-04-15 16:00:00 +02:00 committed by Tomi Valkeinen
parent 6df37271f8
commit 2b88c5bc31
2 changed files with 79 additions and 0 deletions
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1
drivers/video/omap2/displays/Kconfig
View File

@ -10,6 +10,7 @@ config PANEL_GENERIC
config PANEL_SHARP_LS037V7DW01 config PANEL_SHARP_LS037V7DW01
tristate "Sharp LS037V7DW01 LCD Panel" tristate "Sharp LS037V7DW01 LCD Panel"
depends on OMAP2_DSS depends on OMAP2_DSS
select BACKLIGHT_CLASS_DEVICE
help help
LCD Panel used in TI's SDP3430 and EVM boards LCD Panel used in TI's SDP3430 and EVM boards

78
drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
View File

@ -20,10 +20,17 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/device.h> #include <linux/device.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/slab.h>
#include <plat/display.h> #include <plat/display.h>
struct sharp_data {
struct backlight_device *bl;
};
static struct omap_video_timings sharp_ls_timings = { static struct omap_video_timings sharp_ls_timings = {
.x_res = 480, .x_res = 480,
.y_res = 640, .y_res = 640,
@ -39,18 +46,89 @@ static struct omap_video_timings sharp_ls_timings = {
.vbp = 1, .vbp = 1,
}; };
static int sharp_ls_bl_update_status(struct backlight_device *bl)
{
struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);
int level;
if (!dssdev->set_backlight)
return -EINVAL;
if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
bl->props.power == FB_BLANK_UNBLANK)
level = bl->props.brightness;
else
level = 0;
return dssdev->set_backlight(dssdev, level);
}
static int sharp_ls_bl_get_brightness(struct backlight_device *bl)
{
if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
bl->props.power == FB_BLANK_UNBLANK)
return bl->props.brightness;
return 0;
}
static const struct backlight_ops sharp_ls_bl_ops = {
.get_brightness = sharp_ls_bl_get_brightness,
.update_status = sharp_ls_bl_update_status,
};
static int sharp_ls_panel_probe(struct omap_dss_device *dssdev) static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
{ {
struct backlight_properties props;
struct backlight_device *bl;
struct sharp_data *sd;
int r;
dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
OMAP_DSS_LCD_IHS; OMAP_DSS_LCD_IHS;
dssdev->panel.acb = 0x28; dssdev->panel.acb = 0x28;
dssdev->panel.timings = sharp_ls_timings; dssdev->panel.timings = sharp_ls_timings;
sd = kzalloc(sizeof(*sd), GFP_KERNEL);
if (!sd)
return -ENOMEM;
dev_set_drvdata(&dssdev->dev, sd);
memset(&props, 0, sizeof(struct backlight_properties));
props.max_brightness = dssdev->max_backlight_level;
bl = backlight_device_register("sharp-ls", &dssdev->dev, dssdev,
&sharp_ls_bl_ops, &props);
if (IS_ERR(bl)) {
r = PTR_ERR(bl);
kfree(sd);
return r;
}
sd->bl = bl;
bl->props.fb_blank = FB_BLANK_UNBLANK;
bl->props.power = FB_BLANK_UNBLANK;
bl->props.brightness = dssdev->max_backlight_level;
r = sharp_ls_bl_update_status(bl);
if (r < 0)
dev_err(&dssdev->dev, "failed to set lcd brightness\n");
return 0; return 0;
} }
static void sharp_ls_panel_remove(struct omap_dss_device *dssdev) static void sharp_ls_panel_remove(struct omap_dss_device *dssdev)
{ {
struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
struct backlight_device *bl = sd->bl;
bl->props.power = FB_BLANK_POWERDOWN;
sharp_ls_bl_update_status(bl);
backlight_device_unregister(bl);
kfree(sd);
} }
static int sharp_ls_power_on(struct omap_dss_device *dssdev) static int sharp_ls_power_on(struct omap_dss_device *dssdev)