Re: [PATCH 2.6.19-rc1 full] drivers: add LCD support

Franck Bui-Huu
2006-10-31T08:10:40Z

Paulo Marques wrote:
> Franck Bui-Huu wrote:
>> Miguel Ojeda wrote:
>>> [...]
>>> Anyway, an animation of 10 Hz wouldn't be fine at this
>>> kind of LCDs, so it is pointless which the refresh rate of the driver
>>> is, as it is not useful to display images as fast as the driver
>>> refresh the LCD.
>>
>> An application might want to display quickly a set of images, not for
>> doing animations but rather displaying 'fake' greyscale images.
>
> To do "fake" greyscale you would need to synchronize with the actual
> refresh of the controller or you will have very ugly aliasing artifacts.
>
> Since there is no hardware interface to know when the controller is
> refreshing, I don't think this is one viable usage scenario.
>

eh ?? Did you read my email before ? That was the point I was trying
to raise... and starting the refresh stuff _only_ when the device is
mmaped seems to me a good trade off.

Aynywas it seems that the discusion about the design is closed and
won't lead to interesting things...

bye
Franck