From: Raag Jadav <raag.jadav@intel.com>
To: Zhan Wei <zhanwei919@gmail.com>
Cc: matthew.brost@intel.com, thomas.hellstrom@linux.intel.com,
rodrigo.vivi@intel.com, corbet@lwn.net,
skhan@linuxfoundation.org, intel-xe@lists.freedesktop.org,
dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] drm/xe/hwmon: document DG2 fan speed reporting quirk
Date: Sat, 30 May 2026 09:12:48 +0200 [thread overview]
Message-ID: <ahqN8Esjz9SmGofH@black.igk.intel.com> (raw)
In-Reply-To: <20260529172449.41504-1-zhanwei919@gmail.com>
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 <zhanwei919@gmail.com>
Reviewed-by: Raag Jadav <raag.jadav@intel.com>
prev parent reply other threads:[~2026-05-30 7:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260527115311.13398-1-zhanwei919@gmail.com>
2026-05-29 13:50 ` [PATCH v2] drm/xe/hwmon: document DG2 fan speed reporting quirk Zhan Wei
2026-05-29 14:05 ` 占wei
2026-05-29 16:12 ` Raag Jadav
2026-05-29 17:24 ` [PATCH v3] " Zhan Wei
2026-05-30 7:12 ` Raag Jadav [this message]
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