From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Thierry Chatard <tchatard@gmail.com>
Cc: linux-kernel@vger.kernel.org, hansg@kernel.org, lee@kernel.org,
platform-driver-x86@vger.kernel.org,
ilpo.jarvinen@linux.intel.com, djrscally@gmail.com,
dan.scally@ideasonboard.com, linux-media@vger.kernel.org,
mchehab@kernel.org, sakari.ailus@linux.intel.com,
jacopo.mondi@ideasonboard.com, nicholas@rothemail.net,
v.vitovt@gmail.com, dmanresa@gmail.com
Subject: Re: [PATCH v11 1/9] mfd: intel-lpss: add resource conflict quirk for Dell Latitude 5285
Date: Thu, 1 Oct 2026 10:05:05 +0300 [thread overview]
Message-ID: <ar4GIfvaxGiykYKX@ashevche-desk.local> (raw)
In-Reply-To: <20260930214321.600863-2-tchatard@gmail.com>
On Wed, Sep 30, 2026 at 02:43:13PM -0700, Thierry Chatard wrote:
> The Dell Latitude 5285 2-in-1 has a BIOS bug where the ACPI GEXP device
> and the I2C4 controller (INT3446) both claim the same MMIO region via the
> shared SB04 variable. This causes intel_lpss_acpi to fail binding to I2C4
> with -EBUSY, preventing the front camera (OV5670) sensor from being
> registered.
>
> Match the affected machine by DMI and the affected device by ACPI ID,
> carrying QUIRK_IGNORE_RESOURCE_CONFLICTS in the ACPI match data and
> applying it to the per-device info in probe. This follows the quirk
> organisation used by the PCI counterpart.
> Assisted-by: Claude Code:claude-opus-4-8
Assisted-by: LLM
...
> +/*
> + * Devices that need a quirk applied only on the machines matched by
> + * intel_lpss_quirk_dmi[] below. The quirk to apply is carried in the
> + * matching entry's driver_data.
> + */
> +static const struct acpi_device_id intel_lpss_acpi_quirk_ids[] = {
> + /* Dell Latitude 5285: ACPI GEXP device conflicts with I2C4 (INT3446) */
> + { "INT3446", QUIRK_IGNORE_RESOURCE_CONFLICTS },
While at it, please move to use C99 initialisers.
> + { }
> +};
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-10-01 7:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-30 21:43 [PATCH v11 0/9] Enable cameras on Dell Latitude 5285 2-in-1 Thierry Chatard
2026-09-30 21:43 ` [PATCH v11 1/9] mfd: intel-lpss: add resource conflict quirk for Dell Latitude 5285 Thierry Chatard
2026-10-01 5:32 ` Sakari Ailus
2026-10-01 7:05 ` Andy Shevchenko [this message]
2026-10-01 7:24 ` Sakari Ailus
2026-09-30 21:43 ` [PATCH v11 2/9] mfd: intel-lpss: add Dell Latitude 7275 to the resource conflict quirk Thierry Chatard
2026-10-01 7:06 ` Andy Shevchenko
2026-09-30 21:43 ` [PATCH v11 3/9] platform/x86: int3472: tps68470: use unsigned int for GPIO lookup loop counters Thierry Chatard
2026-09-30 21:43 ` [PATCH v11 4/9] platform/x86: int3472: tps68470: move Windows MFD setup below the device-type switch Thierry Chatard
2026-09-30 21:43 ` [PATCH v11 5/9] platform/x86: int3472: tps68470: add static clock consumer support Thierry Chatard
2026-09-30 21:43 ` [PATCH v11 6/9] platform/x86: int3472: tps68470: use a common always-on VIO regulator init_data Thierry Chatard
2026-09-30 21:43 ` [PATCH v11 7/9] platform/x86: int3472: tps68470: add board data for Dell Latitude 5285 Thierry Chatard
2026-09-30 21:43 ` [PATCH v11 8/9] media: ipu-bridge: add sensor configuration for OV8858 (INT3477) Thierry Chatard
2026-09-30 21:43 ` [PATCH v11 9/9] media: ov8858: add ACPI device ID INT3477 Thierry Chatard
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