Messages in this thread | | | Date | Mon, 2 Mar 2015 16:11:22 +0000 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH] video: ARM CLCD: Added support for FBIOPAN_DISPLAY and virtual y resolution |
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On Mon, Mar 02, 2015 at 04:08:29PM +0000, Pawel Moll wrote: > I'm not sure about this... The word "virtual" never works well with > device tree nodes defined as "hardware description". > > I understand what you're doing, but adding this property to the display > controller's node doesn't sound right. How does this describe hardware? > If anywhere, it's more like a job for the panel node?
A better description (and implementation) would be to describe the size of the RAM available for video purposes. The driver can then use the requested virtual X resolution to limit (and/or compute) the virtual Y resolution to allow Y panning/wrapping of the display.
This would match some hardware where the video RAM is indeed a separate physical set of RAM (such as the IM-PD/1).
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