Question about sRGB framebuffer support
joculator at gmail.com
Tue May 5 19:17:15 UTC 2020
On Tue, May 5, 2020 at 10:03 PM Sam Ravnborg <sam at ravnborg.org> wrote:
> Hi Artem.
> On Tue, May 05, 2020 at 01:24:16PM +0300, Artem Mygaiev wrote:
> > Hello all
> > I am currently working on DRM/KMS driver for Fresco Logic FL2000 USB display
> > controller . I have already implemented a POC driver  which is working for
> > me, although there are still plenty of things to improve or fix, of course.
> > So far I have one thing that I somehow cannot find in DRM/KMS documentation or
> > existing drivers: how to tell the system that HW expects sRGB (i.e. non-linear)
> > color encoding in framebuffers? This is a HW limitation that I cannot influence
> > by configuration.
> > Any pointers are greatly appreciated.
> No clue, I hope others can help you.
Meanwhile I have implemented conversion to rgb565 in driver, HW seem
to handle it correctly.
> >  www.frescologic.com/product/single/fl2000
> >  https://github.com/klogg/fl2000_drm
> I just visited your github site - and noticed you are using the
> it66121 bridge.
> Phong LE <ple at baylibre.com> have recently submitted a patch to
> add this bridge to the kernel:
Thanks for the pointer, the code looks familiar :)
@Phong, feel free to add me to reviewers, I'll also test it with fl2k later on.
> I did not really looks at your code, awaits that you feel ready to submit
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