ACPI: LPSS: Add LNXVIDEO -> BYT I2C1 to lpss_device_links

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>

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index e7a4504f0fbfe9ec5898549bc20192dbb42af7c2..cd8cf3333f04c207792453d16d2e39ea668363f0 100644 (file)
--- 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) */