Re: [Linux-fbdev-devel] [REVIEW PATCH 8/9] DSS: support for Beagle Board

[Koen K. <k....@st...>]

Op 5 nov 2008, om 11:05 heeft Tomi Valkeinen het volgende geschreven:

> On Tue, 2008-11-04 at 18:28 +0100, ext Koen Kooi wrote:
>> Op 4 nov 2008, om 17:10 heeft Tomi Valkeinen het volgende geschreven:
>>
>>> Signed-off-by: Tomi Valkeinen <tom...@no...>
>>> ---
>>>
>>> arch/arm/mach-omap2/board-omap3beagle.c |  121 ++++++++++++++++++++ 
>>> ++
>>> ++++++---
>>> 1 files changed, 108 insertions(+), 13 deletions(-)
>>>
>>> +static struct omap_display_data beagle_display_data_dvi = {
>>> +	.type = OMAP_DISPLAY_TYPE_DPI,
>>> +	.name = "dvi",
>>> +	.panel_name = "panel-dvi",
>>> +	.u.dpi.data_lines = 24,
>>> +	.panel_reset_gpio = 170,
>>> +	.panel_enable = beagle_enable_dvi,
>>> +	.panel_disable = beagle_disable_dvi,
>>
>> gpio 170 is the enable (or disable, I forget which) for the DVI  
>> framer
>> (TFP410), not a reset gpio. It would be nice to have a way to enable/
>> disable the framer  from userspace since it burns 60-100mA.
>
> Well, is there a big difference between reset and enable?

Reset implies that power stays on (like the reset button on a  
desktop), while enable and disable imply power on and power off. Maybe  
that's just me :)

regards,

Koen


> Anyway, you
> can do
>
> echo "dvi e:0" > /sys/devices/platform/omapfb/displays
>
> and it will turn off the power.
>
> Or, alternatively, use the framebuffer blanking, although that has not
> been implemented to the panel-dvi.c (it's in panel-sdp3430.c).
>
>> regards,
>>
>> Koen
>
> Tom
>
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