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Re: [RESEND PATCH 0/5] platform/x86: bitland-mifs-wmi: MIFS v2 firmware support (Xiaomi Book Pro 14 2026) To: KentoNion , platform-driver-x86@vger.kernel.org Cc: Hans de Goede , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Mingyou Chen , Gladyshev Ilya , linux-kernel@vger.kernel.org, Nabil Danial , Nika Krasnova References: <20260728180944.51356-1-wolf109909@outlook.com> <20260826132922.179563-1-kento@kekto.ru> Content-Language: en-US From: Armin Wolf In-Reply-To: <20260826132922.179563-1-kento@kekto.ru> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:IUChQb03IzJ9wA8hFXYY2/dGBIRhn85uOxde7AWs/TFuJ4rwD0v cDzZ5Him7eSW2ZmLobOVbQggpK1O7gUfQH9oEQkL9hhEwxDwi89A+KBhY44CLLsgSWE4Aqq WX5H0nXOf6rZ3yvQl59qsJ/OuRCFKAn8nrQNbCJFuzMwiE4KKlimg8DVc1B/4yAjt2HvCgi 96UtrMlUpYPZ3kYJ3Hz4A== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:ejhzFvH8fsQ=;HW45xVfzt0a0aKxSGHDxXdfHuSY c4MC40Y2shh4JBOK+OfLkRSXcCaSytmG1ztz4kS1ZXov74d/q1EenP88RkAB0ONo4SmxEK3Mb 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4dIXzldg4vEnY7zuzcSagy5onQBfQHHIFhDYMnkg9ZIBKlJ+ntRe5HXEryg97ECFQET332smz PFzLSzKkOvI= Am 26.08.26 um 15:29 schrieb KentoNion: > Hi Armin, > > On Thu, Jul 30, 2026 at 11:24:14 +0200, Armin Wolf wrote: >> can you share the output of "acpidump" on your machine? Missing Lid >> events usually indicate a deeper problem with the ACPI handling on a >> given machine. > Same product as 4/5 (Xiaomi Book Pro 14 2026, DMI board_name=TM2424, > SKU TM2424-77080, BIOS XMAPT4B0P0707 03/12/2026). acpidump.dat.xz is > 416K, too large for vger; I can send it off-list or put it on GitHub. > Decoded DSDT excerpts below. > > ECON is declared External in the DSDT and is not defined in any of > the 34 SSDTs. The only references are _STA on Q_EC, ADP1 and LID0: > > External (ECON, IntObj) > > Device (Q_EC) /* _HID PNP0C09 */ > { > Method (_STA, 0, NotSerialized) > { > If ((ECON == One)) > { > Return (0x0F) > } > Return (Zero) > } > > OperationRegion (ERAM, SystemMemory, 0xFE0B0300, 0x0100) > /* LSTE is bit 0 at offset 0x14 of ERAM */ > > Method (_GPE, 0, NotSerialized) > { > If (ESPI) > { > Local0 = 0x6E > } > Return (Local0) > } > > Method (_Q0C, 0, NotSerialized) /* lid close */ > { > LIDS = Zero > ^^^GFX0.CLID = Zero > Notify (LID0, 0x80) > } > > Method (_Q0D, 0, NotSerialized) /* lid open */ > { > LIDS = One > ^^^GFX0.CLID = 0x03 > Notify (LID0, 0x80) > } > > Device (LID0) /* _HID PNP0C0D */ > { > Method (_STA, 0, NotSerialized) > { > If ((ECON == One)) > { > Return (0x0F) > } > Return (Zero) > } > } > } > > So _STA would return 0 even if ECON existed and were zero, and today > it AE_NOT_FOUNDs: > > ACPI BIOS Error (bug): Could not resolve symbol > [\_SB.PC00.LPCB.Q_EC._STA.ECON], AE_NOT_FOUND > (same for Q_EC.ADP1._STA and Q_EC.LID0._STA) > > That does not stop the boot DSDT EC or the lid button on this BIOS: > > ACPI: EC: EC started > ACPI: \_SB_.PC00.LPCB.Q_EC: Boot DSDT EC used to handle transactions > ACPI: EC: interrupt unblocked > ACPI: EC: event unblocked > ACPI: EC: GPE=0x6e > ACPI: \_SB_.PC00.LPCB.Q_EC: EC: Used to handle transactions and events > input: Lid Switch as .../PNP0C09:00/PNP0C0D:00/input/input0 > ACPI: button: Lid Switch [LID0] > > LID0 is \_SB_.PC00.LPCB.Q_EC.LID0. > /proc/acpi/button/lid/LID0/state reads "open" (SW_LID on event0). > I have not yet captured a close/open pair under acpi_listen; I can > if that is useful. > > 4/5's claim that "the ACPI EC driver therefore never binds" is not > true here. Polling LSTE and evaluating _Q0C/_Q0D from bitland-mifs-wmi > would be the wrong layer. I am not putting that in the TM2424 > follow-up on Mingyou's v5. The remaining bug is the missing ECON > object used by _STA. > > Thanks, > Kento Interesting, i would suggest a BIOS update. Unfortunately this would likely require you to also install Windows on this machine, because Xiaomi distributes BIOS updates thru Windows Update :/. Thanks, Armin Wolf