drm/i915/vlv_dsi: Add DMI quirk for backlight control issues on Lenovo Yoga Tab 3...
authorHans de Goede <hdegoede@redhat.com>
Wed, 20 Sep 2023 19:56:12 +0000 (21:56 +0200)
committerHans de Goede <hdegoede@redhat.com>
Thu, 12 Oct 2023 10:41:48 +0000 (12:41 +0200)
commitf6f4a0862bde6c2a15654da624dc8509bf66d87e
treea83078bc4cf03cc1b2edbb889ccfdf65a5b66081
parent2cac4ed99f9e798df8a4c34a8399adf3c587ccba
drm/i915/vlv_dsi: Add DMI quirk for backlight control issues on Lenovo Yoga Tab 3 (v2)

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