media: atomisp_gmin_platform: Add DMI quirk to not turn AXP ELDO2 regulator off on some boards

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The TrekStor SurfTab duo W1 10.1 has a hw bug where turning eldo2 back on
after having turned it off causes the CPLM3218 ambient-light-sensor on
the front camera sensor's I2C bus to crash, hanging the bus.

Add a DMI quirk table for systems on which to leave eldo2 on.

Note an alternative fix is to turn off the CPLM3218 ambient-light-sensor
as long as the camera sensor is being used, this is what Windows seems
to do as a workaround (based on analyzing the DSDT). But that is not
easy to do cleanly under Linux.

Link: https://lore.kernel.org/linux-media/20220116215204.307649-10-hdegoede@redhat.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

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Hans de Goede 2022-01-16 22:52:04 +01:00 • committed by Mauro Carvalho Chehab

parent f88fba1a41

commit 2c39a01154

1 changed files with 18 additions and 0 deletions

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drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c

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