[Intel-gfx] [PATCH 4/4] drm/i915/bios: do not discard address space

[Jani Nikula]

On Fri, 08 Nov 2019, Lucas De Marchi <lucas.demarchi at intel.com> wrote:
> On Fri, Nov 08, 2019 at 01:14:03PM +0200, Jani Nikula wrote:
>>Follow-up: store pointer to the oprom vbt somewhere under i915->vbt, and
>>have debugfs i915_vbt() handle that properly.
>
> I don't think this is needed. The thing I'm doing here is the same as
> what can be accomplished by reading the rom from sysfs:
>
> find /sys/bus/pci/devices/*/ -name rom
> ... choose one
>
> echo 1 > rom # to allow reading the rom
> hexdump -C rom

I think it'll eventually be needed because using debugfs i915_vbt is how
we tell people to dump the VBT for debugging, and that's what they're
accustomed to. (And yeah, we're missing that for pre-opregion machines.)

BR,
Jani.


-- 
Jani Nikula, Intel Open Source Graphics Center