Re: working LCD driver

Andrew Zabolotny wrote:

>On Thu, 26 Feb 2004 20:15:55 +0100
>alain2210@free.fr wrote:
>
>
>
>>I have tried this. Of course the SET GPLR(67) 1 does nothing when the
>>ipaq is on, but the SET GPLR(67) 0 just freeze the LCD on with the
>>backlight on and the last image of haret, but the touchscreen does
>>not answer anymore. Does it mean that it is the power of the MediaQ ?
>>
>>
>Perhaps. Does iPAQ freeze in general or just the screen? Can you enter
>any more commands via telnet?
>
>In fact, an easier way is to ask jamey what is GPIO67 exactly - the
>power to the LCD panel or to the MediaQ chip? The problem is that in
>description of GPIO_NR_H2200_LCD_IRQ_N LCD here means really "MediaQ",
>and it's natural to expect that GPIO_NR_H2200_LCD_POWER_ON also means
>"power to MediaQ chip", but it could mean "power to LCD panel" as well.
>
>
That is poorly named. I based the name on the signal name, not on where
it connects. Please rename it to GPIO_NR_H2200_MQ1178_PWDN_N or
something like that.

There are 3 GPIO's on the MQ1178 that are used to control LCD power.
 MQ GPIO60 controls LCD DVDD (active high)
 MQ GPIO61 controls LCD 5V (active high)
 MQ GPIO62 is XDON to the lcd panel

MQ PWM1 seems to connect to the backlight on the lcd panel.

Jamey
Received on Thu Feb 26 20:08:48 2004