Re: [PATCH v2] platform/x86: int3472: Use actual clock frequency for DSM method

[Sergey Lebedev]

Hi Hao,

This fixes a camera on the Surface Pro 11 with Intel (Lunar Lake), for
your v2:
https://lore.kernel.org/all/20251208035122.2147678-1-hao.yao@xxxxxxxxx/

Its infrared sensor, an ST VD55G0 (SMO55F0), has 24 MHz in its SSDB,
and INT3472 turns its clock on through the _DSM with 1, 19.2 MHz. The
sensor driver sets the sensor up for 24 MHz, so everything the sensor
derives runs at four fifths: it streamed at 47.31 fps where its
configuration gives 59.14, which also puts its MIPI output at 633.6
Mbps, below the sensor's minimum of 750. With your v2 on media next and
my vd55g0 driver, the sensor runs at 59.14 fps in every mode, as computed.
A value of 0 did not change the clock here either, as you saw on the
oscilloscope.

Tested-by: Sergey Lebedev <lsa.uz@xxxxx> # Surface Pro 11 (Intel), VD55G0

Would you send a v3 with the Fixes tag and the note on 0 and 2 that Ilpo
asked for? I will repeat the Tested-by on it. If you are busy, I can
resend it with your authorship.

Sergey