Re: [PATCH] arm64: dts: qcom: glymur: Drop fake PCIe phy 3B
From: Krzysztof Kozlowski
Date: Thu Apr 23 2026 - 03:18:24 EST
On 22/04/2026 22:08, Dmitry Baryshkov wrote:
> On Tue, Apr 21, 2026 at 08:41:14AM +0200, Krzysztof Kozlowski wrote:
>> On 20/04/2026 20:02, Dmitry Baryshkov wrote:
>>> On Mon, Apr 20, 2026 at 03:36:17PM +0200, Krzysztof Kozlowski wrote:
>>>> According to user manual / programming guide there is no separate PCIe
>>>> phy 3A and 3B, but one 8-lane QMP PCIe Gen5 PHY which consists of two
>>>> 4-lane blocks. This is also visible in memory map, where the 0xf00000
>>>> is marked as the main block with additional sub blocks for each 4-lane
>>>> phys.
>>>>
>>>> Describing the sub phys without the rest is not correct from hardware
>>>> description, even if it works.
>>>
>>> Is this the case for the other bifurcated PHYs?
>>>
>>
>> There's more? Oh damn...
>
> In the previous generations. I think Hamoa had one.
Ah, I did not check the others and there is little we can do there -
it's released DTS. This cannot be easily changed while keeping DTS
compatible with users, because probably two PHY nodes will be replaced
by one with different compatible.
Therefore I want to change only the platforms freshly added, where any
incompatibility impact will be minimal.
Best regards,
Krzysztof