> The linux bootup logo is green, and LCD is dark. It looks like backlight
> disabled.
>
> I commented the following two sentences in lcd_2430.c, there is still
> the same thing. It seems these two sentences doesn't work.
>
> 96 omap_set_gpio_dataout(enable_gpio, 1);
> 97 omap_set_gpio_dataout(backlight_gpio, 1);
>
> Both the the latest kernels from omapzoom.org and linux-omap-2.6 have
> this problem. However, the old version in linux-omap-2.6, 2.6.21,
> doesn't have this problem.
>
> Stanley.
If I use this piece of code in panel suspend and resume, I see that the panel
backlight is going off on suspend and comes back while calling resume. Give a
try .
static int sdp2430_panel_suspend(struct platform_device *pdev, pm_message_t
mesg)
{
+ omap_set_gpio_dataout(backlight_gpio, 0);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,0x0,
+ TWL4030_VPLL2_DEDICATED);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,0x0,
+ TWL4030_VPLL2_DEV_GRP);
+ mdelay(4);
return 0;
}
static int sdp2430_panel_resume(struct platform_device *pdev)
{
+ if (lcd_in_use)
+ return 0;
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+ ENABLE_VPLL2_DEDICATED,TWL4030_VPLL2_DEDICATED);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+ ENABLE_VPLL2_DEV_GRP,TWL4030_VPLL2_DEV_GRP);
+ omap_set_gpio_dataout(backlight_gpio, 1);
+
return 0;
}
>
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