[PATCH v5 4/8] drm/cma-helper: Use the generic fbdev emulation

[John Stultz]

On Thu, Aug 23, 2018 at 12:46 AM, Laurent Pinchart
<laurent.pinchart at ideasonboard.com> wrote:
> Hi John,
>
> On Thursday, 23 August 2018 07:14:08 EEST John Stultz wrote:
>> On Mon, Aug 20, 2018 at 11:44 PM, John Stultz wrote:
>> > Hey Noralf, all,
>> >
>> >   I've been digging for a bit on the regression that this patch has
>> >
>> > tripped on the HiKey board as reported here:
>> > https://lkml.org/lkml/2018/8/16/81
>> >
>> > The first issue was that the kirin driver was setting
>> > mode_config.max_width/height = 2048, which was causing errors as the
>> > the requested resolution was 1920x2160 (due to surfaceflinger
>> > requesting y*2 for page flipping).
>>
>> Hey Noralf,
>>   Sorry, I know your probably sick of me. But I just wanted to circle
>> around on this little bit. So part of the issue I found earlier, was
>> that I'm running w/ CONFIG_DRM_FBDEV_OVERALLOC=200, to support
>> Surfaceflinger's request for page flipping.
>
> Possibly slightly out of topic, but we're in 2018, is there any plan to make
> SurfaceFlinger move away from FBDEV ?

Yes. That is actually work-in-progress for both HiKey and HiKey960,
switching to use the drm_hwcomposer once we can get upstream project
into a sane state.

thanks
-john