PCI Radeon RV100 detection hang on sparc64

[Michel Dänzer]

On Don, 2012-09-06 at 17:41 +0300, Meelis Roos wrote: 
> This is with initialyy unmodified 3.6.0-rc4-00101-g0809095 kernel in 
> Ultra 10 (clean, without my "Video RAM" hack that I talked in other 
> sparclinux posts). When I saw that Sun XVR-100 was detected fine by the 
> kernel, I compiled radeon drm driver with modesetting enabled and tried 
> it:
> 
> [drm] radeon defaulting to kernel modesetting.
> [drm] radeon kernel modesetting enabled.
> PCI: Enabling device: (0000:02:02.0), cmd 82
> [drm] initializing kernel modesetting (RV100 0x1002:0x5159 0x1002:0x0908).
> [drm] register mmio base: 0x10000000
> [drm] register mmio size: 32768
> [drm:radeon_device_init] *ERROR* Unable to find PCI I/O BAR
> 
> And here the machine hangs. Debugging printk-s reveal that it does not 
> find any active I/O port resources and then continues into initializing 
> the card. Down in igp_read_bios_from_vram() it successfully ioremaps 
> memory region 0 (vram_base=1ff08000000 and size=40000) and tries to read 
> 2 bytes from there and hangs on reading bios[0].

Is the card initialized by OpenFirmware? E.g., does it display anything
before the kernel boots?


> With radeon.modeset=0, it boots [...]

Does X work with DRI enabled then?


-- 
Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer