[PATCH 0/5] Add DisplayPort support for rk3576

[Chaoyi Chen]

Hi Sebastian,

On 1/14/2026 5:51 AM, Sebastian Reichel wrote:
> Hi,
> 
> On Fri, Jan 09, 2026 at 04:00:43PM +0800, Andy Yan wrote:
>> From: Andy Yan <andy.yan at rock-chips.com>
>>
>> The DisplayPort found on RK3576 is very similar to that of RK3588,
>> but work in qual pixel mode and support for MST.
>>
>> This patch series aims to add basic display output, not include
>> audio and MST, which will be the work for the next stage.
>>
>> Only test with 2 lane standard DP port output now.
> 
> This is a nice minimal series :) I got it working to some degree on
> the RK3576 Sige5 USB-C port. The display connection detection is
> _very_ unstable, but that part is handled by the TypeC Port Manager
> and unrelated to the DP controller (and already an issue on the RK3588
> based Rock 5B). IF the display is detected (i.e. USB-C side worked
> properly), the DP controller managed to do proper output too. Thus
> I believe this should be merged. I plan to look into the TCPM issues
> in the meantime.

Based on experience with other platforms, I suspect that some HPD events
are not being properly propagated to the DP driver. This might be worth 
looking into.

-- 
Best, 
Chaoyi