[Mesa-dev] [PATCH v1 0/7] Implement commont gralloc_handle_t in libdrm

[Robert Foss]

Hey Chih-Wei,

On 03/23/2018 03:43 AM, Chih-Wei Huang wrote:
> 2018-03-22 16:23 GMT+08:00 Tomasz Figa <tfiga at chromium.org>:
>> Hi Chih-Wei,
>>
>> On Thu, Feb 22, 2018 at 2:53 PM, Chih-Wei Huang <cwhuang at linux.org.tw> wrote:
>>> 2018-02-21 3:03 GMT+08:00 Rob Herring <robh at kernel.org>:
>>>>
>>>> Perhaps worth revisiting. Given we've failed to progress at all since
>>>> then may change opinions some. We already have to handle multiple
>>>> opens share the same pipe_screen, so I don't think reusing the fd buys
>>>> us anything.
>>>>
>>>> Maybe we're close to the point of removing the flink name support too.
>>>> The android-x86 folks have been working to get dma-bufs working.
>>>> Chih-Wei, any comments on this?
>>>
>>> Ah! Sorry. I didn't catch or understand the details.
>>> Did you mean the attempts to use drm_hwcomposer
>>> in android-x86?
>>> My understanding so far is most x86 GPUs won't work
>>> except some very limited models.
>>> It's due to kernel driver issues which may never be solved.
>>> So we can't drop the flink name support.
>>> Please correct me if I am wrong.
>>
>> Could you elaborate a bit more on those GPUs that won't work and
>> corresponding driver issues? We're running cros_gralloc on Intel and
>> AMD GPUs, with DMA-buf and render-node only setup and we haven't seen
>> any problems.
> 
> Hi Tomasz,
> I remember (in our previous discussion) you said
> CrOS uses your own hwcomposer (proprietary?) so
> the story may be different.
> 
> What we have tried is gbm_gralloc + drm_hwcomposer
> and I reported the issues here:
> https://lists.freedesktop.org/archives/dri-devel/2017-September/153580.html

I took the liberty of moving you nouveau issue into the drm_hwc gitlab bugtracker.

https://gitlab.freedesktop.org/drm-hwcomposer/drm-hwcomposer/issues/1

> 
> Sorry I didn't make more tests recently.
> I CC Mauro to comment. He should have made more tests
> with newer kernel and mesa.
>