Re: [RFC PATCH 0/3] staging: remove fbdev drivers

From: Tomi Valkeinen
Date: Thu Dec 08 2016 - 03:02:08 EST

On 08/12/16 03:01, Benjamin Herrenschmidt wrote:
> On Wed, 2016-11-23 at 10:03 +0200, Tomi Valkeinen wrote:
>> Hi,
>> Since the fbdev framework is in maintenance mode and all new display drivers
>> should be made with the DRM framework, remove the fbdev drivers from staging.
>> Note: the patches are created with git format-patch -D, so they can't be
>> applied. Only for review.
> I missed the discussion where this decision was made, I admit I am
> unimpressed by it.
> DRM drivers don't strike me as suitable for small/slow cores with dumb
> framebuffers or simple 2D only accel, such as the one found in the ASpeed
> BMCs.

Then the DRM framework should be improved to be suitable.

> With drmfb you basically have to shadow everything into memory & copy
> over everything, and locks you out of simple 2D accel. For a simple text
> console the result is orders of magnitude slower and memory hungry than
> a simple fbdev.

I don't think that's true. You can have a single fbdev buffer and blit
there all you want, afaik.

> Not everything has a powerful 3D GPU.

We don't use GPU on OMAPs (except for 3D).


Attachment: signature.asc
Description: OpenPGP digital signature