[PATCH v4 4/4] arm64: dts: qcom: add HDMI nodes for msm8998

Jeffrey Hugo quic_jhugo at quicinc.com
Mon Jun 17 17:14:16 UTC 2024


On 6/15/2024 5:35 AM, Konrad Dybcio wrote:
> On 14.06.2024 12:33 PM, Dmitry Baryshkov wrote:
>> On Fri, Jun 14, 2024 at 01:55:46AM GMT, Konrad Dybcio wrote:
>>>
>>>
> 
> [...]
> 
>>> GCC_HDMI_CLKREF_CLK is a child of xo, so you can drop the latter.
>>> It would also be worth confirming whether it's really powering the
>>> PHY and not the TX.. You can test that by trying to only power on the
>>> phy (e.g. call the phy_power_on or whatever APIs) with and without the
>>> clock
>>
>> I'd prefer to keep it. I think the original DT used one of LN_BB clocks
>> here, so it might be that the HDMI uses CXO2 / LN_BB instead of the main
>> CXO.
>>
>> If somebody can check, which clock is actually used for the HDMI, it
>> would be really great.
> 
> +CC jhugo - could you please take a look?
> 
> Konrad

Documentation is not great but it looks like CXO from what little I can 
find.

-Jeff


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