Hi Quentin,
On 11/19/2025 5:52 PM, Quentin Schulz wrote:
Hi Chaoyi Chen,
On 11/19/25 2:55 AM, Chaoyi Chen wrote:
From: Chaoyi Chen <[email protected]>
Some pmdomains rely on RK806 PMIC for power supply. If we don't
enable them in U-Boot, random panic may occur during the Kernel
boot process.
The kernel shouldn't rely on U-Boot doing something to work, so please fix this
with upstream Linux kernel.
Can you tell us what's the issue?
The issue with this patch here is that we probably would need **all** RK3588
boards to have the PMIC enabled, and all the appropriate regulators brought up
before booting into the kernel. It'd be *much* better this is fixed in Linux
(and depending on what we're talking about, it may need another fix in U-Boot
so that whatever depends on the PM domain works as well).
Also, why the PMIC in SPL but not the regulators?
It make sense, but I haven't thought of a specific solution for Kernel yet.
To be specific, I'm trying to get RKVENC to work. It uses an independent power
domain. If RK806 is not enabled in U-Boot, the first power-up attempt for the
pmdomain corresponding to RKVENC will fail in the Kernel.
And essentially, the operations of pmdomains in the Kernel are dependent on
regulators. But it seems that pmdomains driver haven't dealt with this. I have
seen some cases, but it seems that the dependency issue has not been fully
resolved [0].
[0]: https://lore.kernel.org/all/[email protected]/
Cheers,
Quentin
--
Best,
Chaoyi
