[PATCH] Big endian support for RV730

[Alex Deucher]

On Fri, Feb 11, 2011 at 4:52 AM, Cédric Cano <ccano at interfaceconcept.com> wrote:
> Hi
>
> Here are a couple of patches that enable support for RV730 on big endian
> architectures. The following items will work :
> * KMS
>  - correct color in framebuffer
>  - interrupts
>  - kms blit
>  - power management
> * DDX
>  - kms enabled
>  - exa
>  - video textures
>  - hardware cursor
>
> For the BE modifications, the AMD Linux Engineering team advised me to focus
> on :
> - make sure all the atombios data table accesses are endian safe
> - set the display controller swappers
> properly(http://lists.freedesktop.org/archives/dri-devel/2011-January/007486.html)
> - make sure the appropriate endian swapper is enabled in the texture and
> vertex fetch constants (see SQ_TEX_RESOURCE_WORD* and SQ_VTX_RESOURCE_WORD*
> regs)
> - make sure the shaders are stored in LE order
> - make sure shader constant buffers are stored in LE order
> - endian swap IH (interrupt handler) packets
> - endian swap the CP command buffers
> - endian swap WB (write back) buffers
>

That was me :)

> That's what I tried to do and so far, I have KMS and DDX (with EXA) drivers
> working. Drivers have been tested on a MPC8640 custom design, with a custom
> graphics board based on E4690 (RV730). I'm using a custom linux distribution
> with Xorg 7.6 (xf86-video-ati 6.13.2). The latest kernel available for my
> board is 2.6.35.6 so I haven't tested with upstream kernel.

I'll review and commit your patches this weekend.  I'll probably break
them up into smaller commits if that's ok with you.

>
> I'd also like to test more the ddx driver in order to check the EXA
> functions do a correct rendering. Is there a driver framework testing, or
> some kind of unit test you, ddx driver writers, are using ?

cairo has some tests.  Also, rendercheck.

Alex

>
> Regards,
> Cedric Cano
>
>
>
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