On some Cherry Trail systems the GPU ACPI fwnode has power-resources which
point to the PMIC, which is connected over a LPSS I2C controller. The GPU
is a PCI device and PCI devices are powered-on at the resume_noirq resume
phase.
Since the GPU power-resources need the I2C controller, recent acpi_lpss.c
changes now also power-up the LPSS I2C controllers on BYT and CHT devices
in the resume_noirq resume phase. But during this phase the IRQ of the
controller is disabled leading to these errors:
i2c_designware 808622C1:06: controller timed out
ACPI Error: AE_ERROR, Returned by Handler for [UserDefinedRegion]
ACPI Error: Method parse/execution failed \_SB.P18W._ON, AE_ERROR
video LNXVIDEO:00: Failed to change power state to D0
This commit makes the i2c-designware controller set the IRQF_NO_SUSPEND
flag when requesting the interrupt on BYT and CHT devices, so that the IRQ
is left enabled during the noirq phase, fixing this.
Tested-by: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>
Acked-by: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/i2c/busses/i2c-designware-core.h | 1 +
drivers/i2c/busses/i2c-designware-master.c | 2 +-
drivers/i2c/busses/i2c-designware-platdrv.c | 4 ++--
3 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
index 69b8a5df3866..450a4135af63 100644
--- a/drivers/i2c/busses/i2c-designware-core.h
+++ b/drivers/i2c/busses/i2c-designware-core.h
@@ -276,6 +276,7 @@ struct dw_i2c_dev {
#define ACCESS_SWAP 0x00000001
#define ACCESS_16BIT 0x00000002
#define ACCESS_INTR_MASK 0x00000004
+#define ACCESS_NO_IRQ_SUSPEND 0x00000008
#define MODEL_CHERRYTRAIL 0x00000100
diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
index 2ccb527735f9..2a630ac35ba2 100644
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -707,7 +707,7 @@ int i2c_dw_probe(struct dw_i2c_dev *dev)
adap->dev.parent = dev->dev;
i2c_set_adapdata(adap, dev);
- if (dev->shared_with_punit) {
+ if (dev->flags & ACCESS_NO_IRQ_SUSPEND) {
irq_flags = IRQF_NO_SUSPEND;
} else {
irq_flags = IRQF_SHARED | IRQF_COND_SUSPEND;
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index e92fdb46b5a0..3f0289a8233d 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -123,8 +123,8 @@ static const struct acpi_device_id dw_i2c_acpi_match[] = {
{ "INT33C3", 0 },
{ "INT3432", 0 },
{ "INT3433", 0 },
- { "80860F41", 0 },
- { "808622C1", MODEL_CHERRYTRAIL },
+ { "80860F41", ACCESS_NO_IRQ_SUSPEND },
+ { "808622C1", ACCESS_NO_IRQ_SUSPEND | MODEL_CHERRYTRAIL },
{ "AMD0010", ACCESS_INTR_MASK },
{ "AMDI0010", ACCESS_INTR_MASK },
{ "AMDI0510", 0 },
--
2.19.0.rc1
