drm/i915/vlv_dsi: Add DMI quirk for backlight control issues on Lenovo Yoga Tab 3 (v2)

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On the Lenovo Yoga Tab 3 Pro YT3-X90F there are 2 issues with the backlight
on/off MIPI sequences:

1. The backlight on sequence has an I2C MIPI sequence element which uses
   bus 0, but there is a bogus I2cSerialBus resource under the GPU in
   the DSDT which causes i2c_acpi_find_adapter() to pick the wrong bus.

2. There is no backlight off sequence, causing the backlight to stay on.

Add a DMI quirk fixing both issues.

v2:
- Add Closes tag to gitlab issue with drm.debug=0xe, VBT info

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/9380
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230920195613.304091-4-hdegoede@redhat.com

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This commit is contained in:

Hans de Goede 2023-09-20 21:56:12 +02:00

parent 2cac4ed99f

commit f6f4a0862b

1 changed files with 34 additions and 0 deletions

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drivers/gpu/drm/i915/display/vlv_dsi.c

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