KMS and TTM questions

[Jerome Glisse]

On Mon, Oct 3, 2011 at 3:01 PM, James Simmons <jsimmons at infradead.org> wrote:
>
> Hi!
>
>        I been working on updating the VIA kernel driver to using KMS
> and TTM. So this weekend I started to implement a couple of buffer
> allocations internally to the driver from the video ram. So the first
> buffer I allocated was not the front buffer from the video vram but a
> virtual queue buffer of about 256K in size. The second allocation was
> the front buffer. The problem was the buffer offset for the second
> allocation was the same as the VQ buffer. I'm stump to what I'm doing
> wrong, so does anyone have a idea?

Without code to look at we all can start guessing :) my guess is either
you are not using the proper offset field or you are allocating from
different memory pool.

>        Second question I have is how are monochrome cursor images
> handled with KMS. Yes we need to support CLE266 which is used in a lot
> of POS devices. That chipset only supports monochrome cursors.

You can hide the cursor limitation from userspace and pretend supporting
rgb cursor.

Cheers,
Jerome