[PATCH v3 2/2] drm/bridge: imx: add driver for HDMI TX Parallel Video Interface

[Adam Ford]

On Mon, Dec 18, 2023 at 2:59 AM Alexander Stein
<alexander.stein at ew.tq-group.com> wrote:
>
> Hi everybody,
>
> Am Montag, 18. Dezember 2023, 09:48:49 CET schrieb Luca Ceresoli:
> > Hi,
> >
> > On Mon, 18 Dec 2023 04:36:55 +0200
> >
> > Laurent Pinchart <laurent.pinchart at ideasonboard.com> wrote:
> > > On Fri, Dec 15, 2023 at 05:09:41PM -0300, Fabio Estevam wrote:
> > > > On Fri, Dec 15, 2023 at 4:01 PM Adam Ford <aford173 at gmail.com> wrote:
> > > > > Thanks for the list.  I was able to successfully build the stable 6.6
> > > > > branch with those patches applied and I have the HDMI working.
> > > > > Unfortunately, I get build errors on the linux-next, so it's going to
> > > > > take me a little time to sort through all of this.
> > > >
> > > > If you need help to figure this problem out, please let me know.
> > > >
> > > > I haven't tried it against linux-next.
> > > >
> > > > > I am thinking that it would be better to consolidate all these
> > > > > together into one series instead of piecemealing it.  However, there
> > > > > are some items that can be submitted right away without significantly
> > > > > reworking them against linux-next.  Do people have a preference?
> > > >
> > > > I think it makes sense to re-submit the "easy ones" right away.
> > >
> > > Agreed. The more we can merge quickly, the easier it will become to
> > > rebase and upstream the rest.
> >
> > I agree as well, "release early, release often". These patches are
> > around since a long time and lots of people are using them already, and
> > tracking all of them from different threads is time-consuming. I will
> > happily test them early as soon as they are sent.
>
> I lost track of the series well, but I do remember I had to adjust the
> original series to get it running on linux-next.
> Please keep me on CC so I can add my local changes if necessary.

Fabio / Alexander,

I have a pending question to Peng regarding a change I pulled from NXP
[1] which moves the FDCC clock to the power domain and removes it from
the HDMI-TX driver.  I am hoping to get that answered soon.  If not, I
might just push the series again after a few more days.  In the
meantime, I have a git repo [2] if anyone wants to review stuff.
Marek Vasut sent me an offline patch to address some suspend/resume
issues, and I incorporated them into the series.  My suspend-resume
has been broken for a while, so I cannot test that.


> I have a proof of concept for HDMI audio, which is based on the base HDMI
> support. I can continue on that after merge, but I'm lacking an idea how to
> add some kind of "bridge" into the audio pipeline.

Maybe the git repo above will help.  It looks like the xcvr and
audio-tx drivers are there, but they appear to be dependent on custom
NXP sound card drivers which would be nice to replace with standard
audio drivers, so let me know if I can assist in any way.

>
> Best regards
> Alexander
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[1] - https://patchwork.kernel.org/project/linux-pm/patch/20240106223951.387067-2-aford173@gmail.com/
[2] - https://github.com/aford173/linux/tree/for-6.9-imx8mp-hdmi

>