Re: Rockchip RK3328 Rock64 HDMI

Well, … estimation ...,
To say it in short:
While RK3399 HDMI even worked with fbsd-efifb on an old installation on my Rock960(which is the same gpu as the RockPro64) ,
this will not happen for the RK3328/ Rock64.

In longer but simple  words :
Needed 5 minutes to hack u-boot`s current version  to get HDMI - output on the RK3328/ Rock64..
It works because u-boot(and linux) has built in driver for the hdmi-inno phy.
So the dts devicetree- entries for the hdmi_phy point to that driver ( which is glued in their drm).
So u-boot sets up it’s framebuffer based on this driver while it cannot be handed over to FreeBSD 
because it`s not implemented FreeBSD (as Manu said) .
So from u-boot`s framebuffer(or whatever hdmi-output) the screen turns back to dark black exactly in the moment of the 
handover to fbsd kernel,  no automatically efifb.
 I don`t assume that a dedicated developer will port/write the necessary hdmi-drivers 
for the outdated RK3328/Rock64 because (e.g in this thread) currently exactly 1 person(not me) is known to need the glass console for that Soc...but you never know….



> Am 21.09.2024 um 19:36 schrieb Emmanuel Vadot <[email protected]>:
> 
> On Sat, 21 Sep 2024 15:49:51 +0200
> Klaus Küchemann <[email protected]> wrote:
> 
>> Hi Manu,
>> 
>> thanks for letting me know. It`s the first time I looked deeper into this issue.
>> So you mean that adding RK3328 codes to your DRM-subtree is even necessary 
>> to get efifb console output ?

> No, efifb will automagically works if u-boot setup the display (which
> it should and did iirc but it's been a while)
> 
>> The current state of (at least my) Rock64 is a complete HDMI blank screen without any electrical reaction at boot .
>> Can`t find any specific  Rockchip frame buffer code at first view, so for now I`m a bit confused where to start 
>> to get any HDMI-output.u-boot or firmware or your drm-subtree, or is there a specific Rockchip bug somewhere??? 
> 
> As said above for efifb u-boot needs to setup hdmi etc ... If it's not
> done right now maybe some config is needed.
> drm-subtree is needed if one wants 2D accel (but needs code), for 3D we
> will need lima ported as this GPU isn't supported by panfrost iirc.