On Thu, Oct 24, 2019 at 11:57:22PM +0200, Hans de Goede wrote:
> Various Asus Bay Trail devices (T100TA, T100CHI, T200TA) have an embedded
> controller connected to I2C1 and the iGPU (LNXVIDEO) _PS0/_PS3 methods
> access it, so we need to add a consumer link from LNXVIDEO to I2C1 on
> these devices to avoid suspend/resume ordering problems.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 2d71ee0ce72f ("ACPI / LPSS: Add a device link from the GPU to the BYT I2C5 controller")
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> ---
> Changes in v2:
> -Add Fixes: tag
>
> Changes in v3:
> -Point Fixes tag to a more apropriate commit
> ---
> drivers/acpi/acpi_lpss.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
> index e7a4504f0fbf..cd8cf3333f04 100644
> --- a/drivers/acpi/acpi_lpss.c
> +++ b/drivers/acpi/acpi_lpss.c
> @@ -477,6 +477,8 @@ static const struct lpss_device_links lpss_device_links[] = {
> {"808622C1", "7", "80860F14", "3", DL_FLAG_PM_RUNTIME},
> /* CHT iGPU depends on PMIC I2C controller */
> {"808622C1", "7", "LNXVIDEO", NULL, DL_FLAG_PM_RUNTIME},
> + /* BYT iGPU depends on the Embedded Controller I2C controller (UID 1) */
> + {"80860F41", "1", "LNXVIDEO", NULL, DL_FLAG_PM_RUNTIME},
> /* BYT CR iGPU depends on PMIC I2C controller (UID 5 on CR) */
> {"80860F41", "5", "LNXVIDEO", NULL, DL_FLAG_PM_RUNTIME},
> /* BYT iGPU depends on PMIC I2C controller (UID 7 on non CR) */
> --
> 2.23.0
>
--
With Best Regards,
Andy Shevchenko
