Attention is currently required from: Matthew Blecker. Hello build bot (Jenkins),
I'd like you to reexamine a change. Please visit
https://review.coreboot.org/c/coreboot/+/56928
to look at the new patch set (#4).
Change subject: mb/google/poppy/variants/atlas: stop setting touchscreen probed=1 ......................................................................
mb/google/poppy/variants/atlas: stop setting touchscreen probed=1
This allows the touchscreen ACPI device in Linux to re-enumerate when rebinding its I2C adapter device.
BUG=b:177350937 TEST=With Atlas DUT running CrOS top-of-tree build, tested new RW and new RO+RW built with this change applied in Atlas CrOS firmware branch.
Without this change, after rebinding the touchscreen's I2C adapter device using sysfs, the touchscreen ACPI and HID devices are absent, and the touchscreen is unresponsive.
With this change, the touchscreen ACPI and HID devices are re-created after rebinding its I2C adapter device, and the touchscreen becomes responsive again.
Test sequence:
1) Boot DUT, verify basic touchscreen functionality.
2) $ cd /sys/bus/platform/drivers/i2c_designware
3) $ ls -ld i2c_designware.0{,/i2c-6{,/i2c-ACPI0C50:00{,/0018:0483:1058.*{,/hidraw{,/hidraw*}}}}} lrwxrwxrwx. 1 root root 0 Aug 12 01:07 i2c_designware.0 -> ../../../../devices/pci0000:00/0000:00:15.0/i2c_designware.0 drwxr-xr-x. 5 root root 0 Aug 12 01:07 i2c_designware.0/i2c-6 drwxr-xr-x. 4 root root 0 Aug 12 01:07 i2c_designware.0/i2c-6/i2c-ACPI0C50:00 drwxr-xr-x. 5 root root 0 Aug 12 01:07 i2c_designware.0/i2c-6/i2c-ACPI0C50:00/0018:0483:1058.0002 drwxr-xr-x. 3 root root 0 Aug 12 01:07 i2c_designware.0/i2c-6/i2c-ACPI0C50:00/0018:0483:1058.0002/hidraw drwxr-xr-x. 3 root root 0 Aug 12 01:07 i2c_designware.0/i2c-6/i2c-ACPI0C50:00/0018:0483:1058.0002/hidraw/hidraw1
4) $ echo i2c_designware.0 > unbind
5) Verify touchscreen is unresponsive.
6) $ ls -ld i2c_designware.0 ls: cannot access 'i2c_designware.0': No such file or directory
7) $ echo i2c_designware.0 > bind
*** Without this change: ***
8) Touchscreen remains unresponsive.
9) $ ls -ld i2c_designware.0{,/i2c-6{,/i2c-ACPI0C50:00}} ls: cannot access 'i2c_designware.0/i2c-6/i2c-ACPI0C50:00': No such file or directory lrwxrwxrwx. 1 root root 0 Aug 12 01:18 i2c_designware.0 -> ../../../../devices/pci0000:00/0000:00:15.0/i2c_designware.0 drwxr-xr-x. 4 root root 0 Aug 12 01:18 i2c_designware.0/i2c-6
*** With this change: ***
8) Touchscreen is functional again.
9) $ ls -ld i2c_designware.0{,/i2c-6{,/i2c-ACPI0C50:00{,/0018:0483:1058.*{,/hidraw{,/hidraw*}}}}} lrwxrwxrwx. 1 root root 0 Aug 12 01:09 i2c_designware.0 -> ../../../../devices/pci0000:00/0000:00:15.0/i2c_designware.0 drwxr-xr-x. 5 root root 0 Aug 12 01:09 i2c_designware.0/i2c-6 drwxr-xr-x. 4 root root 0 Aug 12 01:09 i2c_designware.0/i2c-6/i2c-ACPI0C50:00 drwxr-xr-x. 5 root root 0 Aug 12 01:09 i2c_designware.0/i2c-6/i2c-ACPI0C50:00/0018:0483:1058.0003 drwxr-xr-x. 3 root root 0 Aug 12 01:09 i2c_designware.0/i2c-6/i2c-ACPI0C50:00/0018:0483:1058.0003/hidraw drwxr-xr-x. 3 root root 0 Aug 12 01:09 i2c_designware.0/i2c-6/i2c-ACPI0C50:00/0018:0483:1058.0003/hidraw/hidraw1
Signed-off-by: Matthew Blecker matthewb@chromium.org Change-Id: I7b90690b0591e8748d7a007f8cc9688d393e59db --- M src/mainboard/google/poppy/variants/atlas/devicetree.cb 1 file changed, 0 insertions(+), 1 deletion(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/56928/4