AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-19 17:13:40 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

platform/x86: intel-vbtn: Fix SW_TABLET_MODE always reporting 1 on some HP x360 models

Browse Source 
[ Upstream commit a4327979a19e8734ddefbd8bcbb73bd9905b69cd ]

Some HP x360 models have an ACPI VGBS method which sets bit 4 instead of
bit 6 when NOT in tablet mode at boot. Inspecting all the DSDTs in my DSDT
collection shows only one other model, the Medion E1239T ever setting bit 4
and it always sets this together with bit 6.

So lets treat bit 4 as a second bit which when set indicates the device not
being in tablet-mode, as we already do for bit 6.

While at it also prefix all VGBS constant defines with "VGBS_".

Note this wrokaround was first added to the kernel as
commit d823346876 ("platform/x86: intel-vbtn: Fix SW_TABLET_MODE always
reporting 1 on the HP Pavilion 11 x360").
After commit 8169bd3e6e ("platform/x86: intel-vbtn: Switch to an
allow-list for SW_TABLET_MODE reporting") got added to the kernel this
was reverted, because with the new allow-list approach the workaround
was no longer necessary for the model on which the issue was first
reported.

But it turns out that the workaround is still necessary because some
affected models report a chassis-type of 31 which is on the allow-list.

BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1894017
Fixes: 21d64817c7 ("platform/x86: intel-vbtn: Revert "Fix SW_TABLET_MODE always reporting 1 on the HP Pavilion 11 x360"")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hans de Goede 2020-09-12 11:35:32 +02:00 committed by Greg Kroah-Hartman
parent 6af7b5ab2a
commit 9488824795
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/platform/x86/intel-vbtn.c
View File

@ -15,9 +15,13 @@
#include <linux/platform_device.h>
#include <linux/suspend.h>
/* Returned when NOT in tablet mode on some HP Stream x360 11 models */
#define VGBS_TABLET_MODE_FLAG_ALT 0x10
/* When NOT in tablet mode, VGBS returns with the flag 0x40 */
#define TABLET_MODE_FLAG 0x40
#define DOCK_MODE_FLAG 0x80
#define VGBS_TABLET_MODE_FLAG 0x40
#define VGBS_DOCK_MODE_FLAG 0x80
#define VGBS_TABLET_MODE_FLAGS (VGBS_TABLET_MODE_FLAG | VGBS_TABLET_MODE_FLAG_ALT)
MODULE_LICENSE("GPL");
MODULE_AUTHOR("AceLan Kao");
@ -72,9 +76,9 @@ static void detect_tablet_mode(struct platform_device *device)
if (ACPI_FAILURE(status))
return;
m = !(vgbs & TABLET_MODE_FLAG);
m = !(vgbs & VGBS_TABLET_MODE_FLAGS);
input_report_switch(priv->input_dev, SW_TABLET_MODE, m);
m = (vgbs & DOCK_MODE_FLAG) ? 1 : 0;
m = (vgbs & VGBS_DOCK_MODE_FLAG) ? 1 : 0;
input_report_switch(priv->input_dev, SW_DOCK, m);
}