| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 124/177] ACPI: LPSS: Add LNXVIDEO -> BYT I2C1 to lpss_device_links | Date | Mon, 16 Dec 2019 18:49:40 +0100 |
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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) */
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