From: Hans de Goede hdegoede@redhat.com
commit b3b3519c04bdff91651d0a6deb79dbd4516b5d7b upstream.
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.
Fixes: 2d71ee0ce72f ("ACPI / LPSS: Add a device link from the GPU to the BYT I2C5 controller") Tested-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Hans de Goede hdegoede@redhat.com Reviewed-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Cc: 4.20+ stable@vger.kernel.org # 4.20+ Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/acpi/acpi_lpss.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/acpi/acpi_lpss.c +++ b/drivers/acpi/acpi_lpss.c @@ -477,6 +477,8 @@ static const struct lpss_device_links lp {"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) */