Re: radeonfb: BAR 0: can't reserve [mem 0x98000000-0x9fffffff pref]

["Christian König" <deathsimple@vodafone.de>]

Am 07.06.2016 um 14:19 schrieb Mathieu Malaterre:
> On Tue, Jun 7, 2016 at 8:05 AM, Mathieu Malaterre <malat@debian.org> wrote:
>> Hi Alex,
>>
>> On Mon, Jun 6, 2016 at 7:20 PM, Alex Deucher <alexdeucher@gmail.com> wrote:
>>> On Mon, Jun 6, 2016 at 1:16 PM, Marek Olšák <maraeo@gmail.com> wrote:
>>>> [+ dri-devel]
>>>>
>>>> On Mon, Jun 6, 2016 at 8:42 AM, Mathieu Malaterre <malat@debian.org> wrote:
>>>>> Hi,
>>>>>
>>>>> Before reporting a possible invalid bug report. Does anyone knows why
>>>>> radeaonfb is not configured the same way radeon is ? For instance on a
>>>>> PowerPC machine, when Open Firmware Frame Buffer is used (OFfb), I
>>>>> cannot `modprobe radeonfb` (but I can load `radeon`). It fails with:
>>>>>
>>>>> [   96.551486] radeonfb 0000:00:10.0: enabling device (0006 -> 0007)
>>>>> [   96.551526] radeonfb 0000:00:10.0: BAR 0: can't reserve [mem
>>>>> 0x98000000-0x9fffffff pref]
>>>>> [   96.551531] radeonfb (0000:00:10.0): cannot request region 0.
>>>>> [   96.551545] radeonfb: probe of 0000:00:10.0 failed with error -16
>>>>>
>>>>> It seems (to me) that it should be possible to add something like this
>>>>> to `radeonfb`:
>>>>>
>>>>> https://github.com/torvalds/linux/blob/master/drivers/gpu/drm/radeon/radeon_drv.c#L353
>>>>>
>>>>> Is the above correct ?
>>> Yes, probably.  But is there any reason why you'd want to use radeonfb
>>> rather than radeon?
>> I'll check with the debian-installer team if this is possible. Right
>> now the debian-installer is setup to use `radeonfb` (at least on
>> PowerPC) during the text-based installation.
>>
>> ref: https://bugs.debian.org/825840#77
> [between a rock and a hard place]
>
> So it seems there would be a risk moving from radeonfb to radeon, esp.
> since Debian does not distribute (at least by default) the firmware
> during installation: https://bugs.debian.org/826629#12.
>
> I'll report the bug against radeonfb and see if I can provide a patch.

radeon should be able to offer the same functionality as radeonfb even 
without firmware.

But saying so that functionality is usually rarely tested.

Regards,
Christian.

>
> -M
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