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drm/xe/i2c: Fix the interrupt handling

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The platforms that support the interrupt from the I2C
adapter can not handle the amount of interrupts the adapter
generates because of the way the IRQ is routed in the
hardware. The I2C controller driver has to be kept in
polling mode because of that.

The AMC MCU can still generate critical alerts that have to
be handled. The interrupt from SMBus Alert is left enabled
and handled separately in the Xe. The alerts from the AMC
will cause the device to be declared wedged for now.

Fixes: f0e53aadd7 ("drm/xe: Support for I2C attached MCUs")
Cc: stable@vger.kernel.org
Reviewed-by: Raag Jadav <raag.jadav@intel.com>
Co-developed-by: Ramesh Babu B <ramesh.babu.b@intel.com>
Signed-off-by: Ramesh Babu B <ramesh.babu.b@intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260811121008.1493015-3-heikki.krogerus@linux.intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit a55b76b8bc)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Heikki Krogerus 2026-08-11 14:10:07 +02:00 • committed by Rodrigo Vivi
commit f43fa4b852
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6 changed files with 282 additions and 87 deletions
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