On Sat, May 30, 2026 at 01:24:49AM +0800, Zhan Wei wrote:
> On DG2 the driver always shows two fan channels, because the
> FSC_READ_NUM_FANS command does not work on some cards. OEMs decide how
> the fans map to tach channels, so two fans can share one tach line.
> When that happens, the second channel reads 0 RPM even though the fan
> is spinning.
>
> Note this on the fan2_input ABI entry so the steady 0 RPM is not
> mistaken for a driver bug.
Fixes: 28f79ac609de ("drm/xe/hwmon: expose fan speed")
> Signed-off-by: Zhan Wei <[email protected]>
Reviewed-by: Raag Jadav <[email protected]>
