From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 43AC0580387; Tue, 8 Sep 2026 16:23:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788884609; cv=none; b=cGsm2qnikbAePFjvCyu+7Da2pi12R13ilrUt9WhFS1LJwM04871ylxPIXp6XZf5wjTdnu5QsV1m0cGUmddxFv5cTCCIwGjQlS1wcFnt2GJzt1ceCNuLaKErRG+Jq890PWGM/hzsg2gHNWhpP+HxDDqUV4ziYf3MxBTu0/tMh9+Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788884609; c=relaxed/simple; bh=hub5blECutfizzP3hRGexeRhZ5of1o9nSPjFK5WWoKU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=VcRTQSlkMeixWk6IOFye04/0BNFO3dxnEjq+2HQyQjhcZ0ExV9/rMCsuYMLdEX6iHF8fBiRQUhw54aA2nQPLeEjCOyjDZT2vtSfxW+OQOWI/h0TQJ0c1caQpe5pk8qURYyDOJ6zYUmyQTc/5AG1MSqg1G747hkzGpBd0Hxb44RM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YG4Y+Wt3; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YG4Y+Wt3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7139C1F00A3E; Tue, 8 Sep 2026 16:23:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788884607; bh=/HXYrbgclYu58RuX0QSm6jSDZFolOyDdWjKM7pSOK80=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=YG4Y+Wt3V5bhywm4t3ehe2TVwNWw8ZKVGEMXVpEq7x9UhJmXsHXEm7cZP9mO2b6N1 SGN2Ep555PkW8ZNGjU83f9gLxMbcGYPboa+pTcIH0ip1UliNWbOFMHxOf6HOfrRya/ 6gImKNIxC525JNsQEFp15RhmAdaIIodt2yCkUwY1GiUFP1wbVBWy8n0RikTBzhaPxq +WgAQDCEUqyDC8XlOWaR8Y8uBQiI2lPb2xcbzC9qjPWLnGUY3HenmwB3mE74Ay5Wjm dlCh5DUmR1hvN0M9j7fSk2kg1McJLVWoTEqvMqt6MDEoc5JT3ZkkYGwt9tGPNr9GLD 1cwQoaHVn0EQw== Message-ID: <331c0f09-5d81-4cb8-9728-5b13c252540e@kernel.org> Date: Tue, 8 Sep 2026 18:23:23 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mfd: intel-lpss: add Dell Latitude 7275 to the resource conflict quirk To: "D. Manresa" , Lee Jones Cc: Thierry Chatard , Andy Shevchenko , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Sakari Ailus , Daniel Scally , linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-media@vger.kernel.org References: <20260831160754.9857-2-tchatard@gmail.com> <20260908161629.335223-1-dmanresa@gmail.com> From: Hans de Goede Content-Language: en-US, nl In-Reply-To: <20260908161629.335223-1-dmanresa@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi, On 8-Sep-26 18:16, D. Manresa wrote: > The Dell Latitude 7275 2-in-1 has the same BIOS bug as the Latitude 5285: > the ACPI GEXP device declares an OperationRegion (BAR0) on the GNVS > variable SB04 and the I2C4 controller (INT3446) builds its _CRS from that > same variable, so intel_lpss_acpi fails to bind the controller with > -EBUSY and the front camera sensor (OV5670, INT3479) is never registered > unless acpi_enforce_resources=lax is passed. > > Add the machine to the DMI table so QUIRK_IGNORE_RESOURCE_CONFLICTS is > applied to INT3446 on it as well. > > Assisted-by: Claude Code:claude-fable-5-1 > Signed-off-by: D. Manresa Thanks, patch looks good to me: Reviewed-by: Hans de Goede Regards, Hans > --- > Applies on top of "mfd: intel-lpss: add resource conflict quirk for Dell > Latitude 5285" from Thierry Chatard's v10 series [1]. Thierry, feel free > to fold this into v11 instead if you prefer. > > The conflict was verified in the 7275 DSDT (BIOS 1.18.0): GEXP has > OperationRegion (BAR0, SystemMemory, SB04, 0x0208) and INT3446._CRS > returns LCRS (SMD4, SB04, SIR4). With acpi_enforce_resources=lax, which > has the same effect as the quirk, the controller binds and the camera > works with the board data from "platform/x86: int3472: Add TPS68470 board > data for Dell Latitude 7275" [2]. The distribution kernel here builds > intel-lpss-acpi in, so this exact patch has not been run yet. > > [1] https://lore.kernel.org/linux-media/20260831160754.9857-2-tchatard@gmail.com/ > [2] https://lore.kernel.org/platform-driver-x86/20260908161445.334910-1-dmanresa@gmail.com/ > > drivers/mfd/intel-lpss-acpi.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > --- a/drivers/mfd/intel-lpss-acpi.c > +++ b/drivers/mfd/intel-lpss-acpi.c > @@ -191,6 +191,12 @@ static const struct dmi_system_id intel_lpss_quirk_dmi[] = { > DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude 5285"), > }, > }, > + { > + .matches = { > + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."), > + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Latitude 7275"), > + }, > + }, > { } > }; >