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Wed, 30 Sep 2026 14:43:38 -0700 (PDT) From: Thierry Chatard To: linux-kernel@vger.kernel.org Cc: 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, andriy.shevchenko@intel.com, v.vitovt@gmail.com, dmanresa@gmail.com, Hans de Goede , Thierry Chatard Subject: [PATCH v11 2/9] mfd: intel-lpss: add Dell Latitude 7275 to the resource conflict quirk Date: Wed, 30 Sep 2026 14:43:14 -0700 Message-ID: <20260930214321.600863-3-tchatard@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260930214321.600863-1-tchatard@gmail.com> References: <20260930214321.600863-1-tchatard@gmail.com> Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: "D. Manresa" 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 Reviewed-by: Hans de Goede Reviewed-by: Sakari Ailus Signed-off-by: D. Manresa Signed-off-by: Thierry Chatard --- drivers/mfd/intel-lpss-acpi.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mfd/intel-lpss-acpi.c b/drivers/mfd/intel-lpss-acpi.c index 9d7d0ad62..f49ce3bb8 100644 --- 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"), + }, + }, { } }; -- 2.53.0