Re: Fixing the devicetree of Rock 5 Model B (and possibly others)

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Hello Pratham,

On 2024-03-23 18:02, Pratham Patel wrote:
Since the introduction of the `of: property: fw_devlink: Fix stupid
bug in remote-endpoint parsing` patch, an issue with the device-tree
of the Rock 5 Model B has been detected. All the stable kernels (6.7.y
and 6.8.y) work on the Orange Pi 5, which has the Rockchip RK3588S SoC
(same as the RK3588, but less I/O basically). So, being an owner of
only two SBCs which use the RK3588* SoC, it appears that the Rock 5
Model B's DT is incorrect.

I looked at the patch and tried several things, neither resulted in
anything that would point me to the core issue. Then I tried this:

Could you, please, clarify a bit what's the actual issue you're
experiencing on your Rock 5B?

```
$ grep -C 3 remote-endpoint arch/arm64/boot/dts/rockchip/rk3588-rock-5b.dts

                port {
                        es8316_p0_0: endpoint {
                                remote-endpoint = <&i2s0_8ch_p0_0>;
                        };
                };
        };
--
                i2s0_8ch_p0_0: endpoint {
                        dai-format = "i2s";
                        mclk-fs = <256>;
                        remote-endpoint = <&es8316_p0_0>;
                };
        };
};
```

So, from a cursory look, the issue seems to be related to either the
DT node for the audio codec or related to the es8316's binding itself.
Though I doubt that the later is the issue because if that were the
issue, _someone_ with a Pine64 Pinebook Pro would've raised alarms. So
far, this seems to be related to the `rk3588-rock-5b.dts` and possibly
with the `rk3588s-rock-5a.dts` too.

I would **love** to help but I'm afraid I device-trees are not
something that I am at-all familiar with. That said, I am open to
methods of debugging this issue to provide a fix myself.

I would have replied to the patch's link but unfortunately, I haven't
yet setup neomutt and my email provider's web UI doesn't have a
[straightforward] way to reply using the 'In-Reply-To' header, hence a
new thread. Apologies for the inconvenience caused.

  -- Pratham Patel
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