Re: Rockchip RK3328 Rock64 HDMI

 Hi Klaus,

On Sat, 21 Sep 2024 01:06:21 +0200
Klaus Küchemann <maciphone2@googlemail.com> wrote:

> First time since years I switched the dusty Rock64 on :-)
> yes, you?re right, still not fixed :
> dmesg:
> ..
> clknode_link_recalc: Attempt to use unresolved linked clock: hdmi_phy
> Cannot get frequency for clk: hdmi_phy, error: 9
> ?
> So you can file a bug report to: https://bugs.freebsd.org <https://bugs.freebsd.org/>
> You can attach dmesg there (or what I would prefer:  send dmesg to https://dmesgd.nycbug.org<https://dmesgd.nycbug.org/>)

 This isn't a bug, the hdmi_phy clock is supposed to be exported by
the hdmi-phy driver (see the hdmiphy: phy@ff430000 in the DTS), since we
don't have a driver for this, it's not exported and we warn about this.

> I guess you don`t want to port any linux drivers at first attempt :-) but instead fix the issue 
> to get the framebuffer driver working( with it`s restrictions e.g. no 4K)
> 
> Regards
> K.

 Cheers,

> 
> > Am 20.09.2024 um 19:22 schrieb Christoph Pfaller <pfaller@protonmail.com>:
> > 
> > Hello!
> > 
> > I recently switched to FreeBSD on my Rock64 due to appearing kernel panics when running the board with Linux. So far I enjoy the operating system. However; there is one little annoyance - the integrated HDMI output does not work. So I want to change that.
> > 
> > As we are on ARM my first intention was looking into the device tree for the rk3328. I compared it to Linux device tree and also found some missing parts. My next step was looking into the drivers itself and as the Linux drivers sources are available here https://github.com/torvalds/linux/tree/master/drivers/gpu/drm/rockchip I got some idea how the corresponding driver should look like.
> > 
> > However, I am unsure how I should proceed getting HDMI to work. Accodring to https://wiki.freebsd.org/arm/RockChip HDMI works for the rockchip rk3399 but I could not find any drivers  neither in the freebsd-src or drm-kmod (I am new to FreeBSD so i don't know if this is even the right place to look for). I hope someone with more technical knowledge about FreeBSD or HDMI can provide me with some guidance on where I have to look and work on.
> > 
> > Greetings
> > pf0
> > 
> > 
> 
> 


-- 
Emmanuel Vadot <manu@bidouilliste.com> <manu@freebsd.org>