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SubjectRe: [PATCH 2/2] framebuffer: Remove pmag-aa-fb
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On Sat, 2013-10-12 at 14:08 +0100, Maciej W. Rozycki wrote:
[]
> So I think I've got all the basic stuff covered now, including a change
> similar to your proposal as well as a conversion to the driver model/new
> TURBOchannel support infrastructure. But what I remembered is actually
> right, the issue is wiring hardware cursor support into fbcon. The driver
> uses its own display_switch structure with its own aafbcon_cursor handler
> to use the twin onboard Bt431 chips for cursor generation (there's also
> aafbcon_set_font that pokes at the Bt431s for cursor dimension changes).
> I need to figure out what the best way will be to make the fbcon subsystem
> support such an arrangement and that'll take me a little bit yet, so
> please be patient.
>
> Note that the board is weird enough to have a 1-bit (true monochrome)
> graphics plane, however the Bt455 used by the MX graphics adapter for
> screen image generation is a 4-bit grey-scale video RAMDAC (only the LSB
> inputs of its pixel port are wired to the graphics plane) and the twin
> Bt431s use the overlay plane to produce a 2-bit grey-scale cursor. So we
> do want to use the hardware cursor to be able to make it prominent among
> the characters displayed throughout the screen and a software-generated
> cursor cannot really substitute what hardware provides.

I hope you're enjoying tinkering with old toys.

Best of luck getting it going.




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