2017-05-08 11:02 GMT+02:00 Bill Kontos <vkontogpls@gmail.com>:

I think arm has open source kernel drivers but there is no way they will get mainlined any time soon. The question is, how much does the userland blob do and how much work needs to be done to get libre 2d accel.

A display pipeline is a complex one which requires multiple drivers. Especially on ARM devices where the display pipeline is a "mix and match" one.

So ARM has released a "driver". What type of driver? What functions does it have?

Is it one for their display encoder, a crtc driver? A framebuffer driver? A clasic DRM driver, A KMS driver? A 2D Accelerator for X? A 3D accelator. A shim to acces the hardware using a BLOB build for one specific version of X relying  and kernel on a specific ARM Core design? Probably the last.

And ARM specific driver without sources is worthless. It's use once and only for short time.

SoC with ARM desing are mix and match. Different ARM core designs. Different and mixed GPU's MALI, Vivante, PowerVR, etc. Output (CRTC etc) from all type of different vendors ARM, Designware, etc. Most of the time the manufacture is not disclosed.

If you look at Allwinner. The community now has two display engine drivers. The drivers only setup output and change video modes. GPU type is MALI.

Bealebone has TI SoC for which a KMS/DRM driver was written by Rob clark, tilcdc, which has support for a NXP HDMI controller/encoder. It also has a 2d accelerator from vivante and a 3d accelatror from Imation(powerVR).

With the recent release of the etnaviv driver the BB community wrote a patch to have 2d acceleration. 

Etnaviv and Freedreno had a hard time being included into the Linux projects because of their mix and match nature. A single driver was impossible.

I've once had bought an Atom mini laptop (Dell Mini 1010). Which I explicitly bought because of the most powerful Intel ATOM GPU at the time. Intel has a reasonable Opensource GPU track record. Poulsbo turned out to be an Imation PowerVR licenced design. Boy was I misled: no opensource drivers only blob's compatible with aging and broken kernels and X-servers. So no upgrades for me or anyone else.

So a perfectly capable laptop to the trash.

Intel did release a Opensource driver. A KMS driver. So that means modesetting and nothing more. No 2d acceleration no 3d acceleration nog hardware video decoding. Intel could not build anything better because Imation did not let them. The Intel engineer said that there was enough code and documentation available to create decoder though. But he didn't write it.

This is way closed source drivers a bad idea. They limit the use and lifetime of your devices. 

On May 8, 2017 7:47 AM, "Luke Kenneth Casson Leighton" <lkcl@lkcl.net> wrote:

---
crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68


On Sun, May 7, 2017 at 10:10 PM, zap <zapper@openmailbox.org> wrote:
>
>
> On 05/07/2017 04:29 PM, ronwirring@Safe-mail.net wrote:
>> All software for the mali-t860 is open source?

 none.  MALI is proprietary.

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