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| author | Hans de Goede <hdegoede@redhat.com> | 2024-09-18 18:38:49 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2024-10-01 21:51:26 +0300 |
| commit | ac78288fe062b64e45a479eaae74aaaafcc8ecdd (patch) | |
| tree | 51261ad3fc63a8d01414aa93fb4e2b676830c863 /drivers/cdx/controller/cdx_controller.c | |
| parent | 9852d85ec9d492ebef56dc5f229416c925758edc (diff) | |
| download | linux-ac78288fe062b64e45a479eaae74aaaafcc8ecdd.tar.xz | |
ACPI: video: Add backlight=native quirk for Dell OptiPlex 5480 AIO
Dell All In One (AIO) models released after 2017 may use a backlight
controller board connected to an UART.
In DSDT this uart port will be defined as:
Name (_HID, "DELL0501")
Name (_CID, EisaId ("PNP0501")
The Dell OptiPlex 5480 AIO has an ACPI device for one of its UARTs with
the above _HID + _CID. Loading the dell-uart-backlight driver fails with
the following errors:
[ 18.261353] dell_uart_backlight serial0-0: Timed out waiting for response.
[ 18.261356] dell_uart_backlight serial0-0: error -ETIMEDOUT: getting firmware version
[ 18.261359] dell_uart_backlight serial0-0: probe with driver dell_uart_backlight failed with error -110
Indicating that there is no backlight controller board attached to
the UART, while the GPU's native backlight control method does work.
Add a quirk to use the GPU's native backlight control method on this model.
Fixes: cd8e468efb4f ("ACPI: video: Add Dell UART backlight controller detection")
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patch.msgid.link/20240918153849.37221-1-hdegoede@redhat.com
[ rjw: Changelog edit ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cdx/controller/cdx_controller.c')
0 files changed, 0 insertions, 0 deletions