Mailinglist Archive: radeonhd (312 mails)

[Alex Deucher <alexdeucher@xxxxxxxxx>]

On Sat, Apr 18, 2009 at 10:42 PM, dariemp <dariemp@xxxxxx> wrote:
> Hello everybody,
> I have an ATI Radeon Xpress 1250 (RS600). Previous version of kernel
> Linux did not support DRM for it (/dev/dri/card0 was never created).
> Recently, I update it to version 2.6.30-rc2 and driver radeonhd 1.2.5.
> Now, /dev/dri/card0 is created and Xorg says DRI is available, but it
> fails to open a screen, it just remains black. Xorg logs shows this
> error:
>
> (EE) RADEONHD(0): RHDMCSetupFBLocation: Cannot setup MC: not idle!!!
>
> As I was a little curious about this error, I checked the source code
> and found this comment in rhd_mc.c about MC idling:
>
> "* Likely suspect registers for when the Idle fails:
>  *   DxVGA_CONTROL & D1VGA_MODE_ENABLE (run RHDVGADisable beforehand)
>  *   DxCRTC_CONTROL & 0x1 (run DxCRTCDisable beforehand)
>  *   (... Add more here...) "
>
> But looking for calls to functions RHDVGADisable(), DxCRTCDisable(),
> etc, before the call to RHDMCSetupFBLocation() in rhd_driver.c, I just
> found a call to the first one, so I think maybe some calls to other
> functions are missing. Besides, I can see a code like this before the
> call to RHDMCSetupFBLocation():
>
> if (!rhdAllIdle(rhdPtr))
>        return FALSE;
>
> So, this function, rhdAllIdle(), is not working exactly as expected,
> because is letting RHDMCSetupFBLocation() to be executed. All of this
> are just especulations from my part, I'm not an expert.
>
> Please, any help to solve this problem or any workaround to make
> acceleration work till all the problems are solved, will be very
> appreciated.

The MC setup may need to be adjusted for RS600.  It's working in
radeon (xf86-video-ati), so you could use that code as a reference.

Alex
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