kernel/linux.git/drivers/platform/x86/intel, branch v6.18.34

platform/x86: intel-vbtn: Check ACPI_HANDLE() against NULL

2026-06-01T15:51:04+00:00

[ Upstream commit a9f305c5a355efeb240d406d378491d9eec02d07 ] Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence. Accordingly, add a requisite ACPI_HANDLE() check against NULL to the platform/x86 intel-vbtn driver. Fixes: 26173179fae1 ("platform/x86: intel-vbtn: Eval VBDL after registering our notifier") Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/3426431.aeNJFYEL58@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: intel-hid: Check ACPI_HANDLE() against NULL

2026-06-01T15:51:04+00:00

[ Upstream commit 5c69e090ae5dd93d910f70db0796357080707d26 ] Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence. Accordingly, add a requisite ACPI_HANDLE() check against NULL to the platform/x86 intel-hid driver. Fixes: ecc83e52b28c ("intel-hid: new hid event driver for hotkeys") Signed-off-by: Rafael J. Wysocki Reviewed-by: Andy Shevchenko Link: https://patch.msgid.link/1971512.tdWV9SEqCh@rafael.j.wysocki Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: intel: Move debugfs register before creating devices

2026-05-23T11:07:17+00:00

commit ad3bff944c0f4f2e913298a9664391af32f87491 upstream. It is possible that the driver handling device is enumerated before registering debugfs. If the driver wants to access debugfs by calling tpmi_get_debugfs_dir(), this will return error in this case. Hence register debugfs before creating devices. Fixes: 811f67c51636 ("platform/x86/intel/tpmi: Add new auxiliary driver for performance limits") Signed-off-by: Srinivas Pandruvada Cc: Stable@vger.kernel.org Link: https://patch.msgid.link/20260430151103.1549733-2-srinivas.pandruvada@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Greg Kroah-Hartman

platform/x86/intel-uncore-freq: Handle autonomous UFS status bit

2026-04-18T08:44:58+00:00

commit 4ab604b3f3aa8dcccc7505f5d310016682a99d5f upstream. When the AUTONOMOUS_UFS_DISABLED bit is set in the header, the ELC (Efficiency Latency Control) feature is non-functional. Hence, return error for read or write to ELC attributes. Fixes: bb516dc79c4a ("platform/x86/intel-uncore-freq: Add support for efficiency latency control") Signed-off-by: Srinivas Pandruvada Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260325192909.3417322-1-srinivas.pandruvada@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Greg Kroah-Hartman

platform/x86: ISST: Reset core count to 0

2026-04-18T08:44:58+00:00

commit e1415b9418eb22b4a7a1ef4b4aec9dd0a49e3fa7 upstream. Based on feature revision, number of buckets can be less than the TRL_MAX_BUCKETS. In that case core counts in the remaining buckets can be set to some invalid values. Hence reset core count to 0 for all buckets before assigning correct values. Fixes: 885d1c2a30b7 ("platform/x86: ISST: Support SST-TF revision 2") Signed-off-by: Srinivas Pandruvada Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260325192638.3417281-1-srinivas.pandruvada@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Greg Kroah-Hartman

platform/x86: ISST: Correct locked bit width

2026-04-02T11:23:18+00:00

commit fbddf68d7b4e1e6da7a78dd7fbd8ec376536584a upstream. SST-PP locked bit width is set to three bits. It should be only one bit. Use SST_PP_LOCK_WIDTH define instead of SST_PP_LEVEL_WIDTH. Fixes: ea009e4769fa ("platform/x86: ISST: Add SST-PP support via TPMI") Signed-off-by: Srinivas Pandruvada Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260323153635.3263828-1-srinivas.pandruvada@linux.intel.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Greg Kroah-Hartman

platform/x86: intel-hid: disable wakeup_mode during hibernation

2026-04-02T11:23:06+00:00

[ Upstream commit e02ea3ae8ee40d5835a845884c7b161a27c10bcb ] Add a freeze handler which clears wakeup_mode. This fixes aborted hibernation on Dell Precision 3880. Wakeup event detected during hibernation, rolling back This system sends power button events during hibernation, even when triggered by software. Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218634 Fixes: 0c4cae1bc00d ("PM: hibernate: Avoid missing wakeup events during hibernation") Signed-off-by: David McFarland Link: https://patch.msgid.link/20260205231629.1336348-1-corngood@gmail.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: ISST: Check HWP support before MSR access

2026-04-02T11:23:06+00:00

[ Upstream commit 9f11d9b15efb5f77e810b6dfbeb01b4650a79eae ] On some systems, HWP can be explicitly disabled in the BIOS settings When HWP is disabled by firmware, the HWP CPUID bit is not set, and attempting to read MSR_PM_ENABLE will result in a General Protection (GP) fault. unchecked MSR access error: RDMSR from 0x770 at rIP: 0xffffffffc33db92e (disable_dynamic_sst_features+0xe/0x50 [isst_tpmi_core]) Call Trace: ? ex_handler_msr+0xf6/0x150 ? fixup_exception+0x1ad/0x340 ? gp_try_fixup_and_notify+0x1e/0xb0 ? exc_general_protection+0xc9/0x390 ? terminate_walk+0x64/0x100 ? asm_exc_general_protection+0x22/0x30 ? disable_dynamic_sst_features+0xe/0x50 [isst_tpmi_core] isst_if_def_ioctl+0xece/0x1050 [isst_tpmi_core] ? ioctl_has_perm.constprop.42+0xe0/0x130 isst_if_def_ioctl+0x10d/0x1a0 [isst_if_common] __se_sys_ioctl+0x86/0xc0 do_syscall_64+0x8a/0x100 entry_SYSCALL_64_after_hwframe+0x78/0xe2 RIP: 0033:0x7f36eaef54a7 Add a check for X86_FEATURE_HWP before accessing the MSR. If HWP is not available, return true safely. Fixes: 12a7d2cb811d ("platform/x86: ISST: Add SST-CP support via TPMI") Signed-off-by: Li RongQing Acked-by: Srinivas Pandruvada Link: https://patch.msgid.link/20260303074635.2218-1-lirongqing@baidu.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: intel-hid: Enable 5-button array on ThinkPad X1 Fold 16 Gen 1

2026-04-02T11:22:56+00:00

[ Upstream commit b38d478dad79e61e8a65931021bdfd7a71741212 ] The Lenovo ThinkPad X1 Fold 16 Gen 1 has physical volume up/down buttons that are handled through the intel-hid 5-button array interface. The firmware does not advertise 5-button array support via HEBC, so the driver relies on a DMI allowlist to enable it. Add the ThinkPad X1 Fold 16 Gen 1 to the button_array_table so the volume buttons work out of the box. Signed-off-by: Leif Skunberg Reviewed-by: Hans de Goede Link: https://patch.msgid.link/20260210085625.34380-1-diamondback@cohunt.app Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

platform/x86: intel-hid: Add Dell 14 Plus 2-in-1 to dmi_vgbs_allow_list

2026-04-02T11:22:55+00:00

[ Upstream commit 6b3fa0615cd8432148581de62a52f83847af3d70 ] The Dell 14 Plus 2-in-1 (model DB04250) requires the VGBS allow list entry to correctly enable the tablet mode switch. Without this, the chassis state is not reported, and the hinge rotation only emits unknown scancodes. Verified on Dell 14 Plus 2-in-1 DB04250. Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221090 Signed-off-by: Peter Metz Reviewed-by: Hans de Goede Link: https://patch.msgid.link/20260213044627.203638-1-peter.metz@unarin.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin