media: ipu-bridge: Add DMI quirk for Dell XPS laptops with upside down sensors

The Dell XPS 13 9350 and XPS 16 9640 both have an upside-down mounted
OV02C10 sensor. This rotation of 180° is reported in neither the SSDB nor
the _PLD for the sensor (both report a rotation of 0°).

Add a DMI quirk mechanism for upside-down sensors and add 2 initial entries
to the DMI quirk list for these 2 laptops.

Note the OV02C10 driver was originally developed on a XPS 16 9640 which
resulted in inverted vflip + hflip settings making it look like the sensor
was upright on the XPS 16 9640 and upside down elsewhere this has been
fixed in commit d5ebe3f ("media: ov02c10: Fix default vertical flip").
This makes this commit a regression fix since now the video is upside down
on these Dell XPS models where it was not before.

Fixes: d5ebe3f ("media: ov02c10: Fix default vertical flip")
Cc: [email protected]
Reviewed-by: Bryan O'Donoghue <[email protected]>
Reviewed-by: Sebastian Reichel <[email protected]>
Signed-off-by: Hans de Goede <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>

Author: Hans de Goede

drivers/media/pci/intel/Kconfig

@@ -6,7 +6,7 @@ source "drivers/media/pci/intel/ivsc/Kconfig"
 
 config IPU_BRIDGE
 	tristate "Intel IPU Bridge"
-	depends on ACPI || COMPILE_TEST
+	depends on ACPI
 	depends on I2C
 	help
 	  The IPU bridge is a helper library for Intel IPU drivers to

drivers/media/pci/intel/ipu-bridge.c

@@ -5,6 +5,7 @@
 #include <acpi/acpi_bus.h>
 #include <linux/cleanup.h>
 #include <linux/device.h>
+#include <linux/dmi.h>
 #include <linux/i2c.h>
 #include <linux/mei_cl_bus.h>
 #include <linux/platform_device.h>
@@ -98,6 +99,28 @@ static const struct ipu_sensor_config ipu_supported_sensors[] = {
 	IPU_SENSOR_CONFIG("XMCC0003", 1, 321468000),
 };
 
+/*
+ * DMI matches for laptops which have their sensor mounted upside-down
+ * without reporting a rotation of 180° in neither the SSDB nor the _PLD.
+ */
+static const struct dmi_system_id upside_down_sensor_dmi_ids[] = {
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS 13 9350"),
+		},
+		.driver_data = "OVTI02C1",
+	},
+	{
+		.matches = {
+			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "XPS 16 9640"),
+		},
+		.driver_data = "OVTI02C1",
+	},
+	{} /* Terminating entry */
+};
+
 static const struct ipu_property_names prop_names = {
 	.clock_frequency = "clock-frequency",
 	.rotation = "rotation",
@@ -248,6 +271,12 @@ static int ipu_bridge_read_acpi_buffer(struct acpi_device *adev, char *id,
 static u32 ipu_bridge_parse_rotation(struct acpi_device *adev,
 				     struct ipu_sensor_ssdb *ssdb)
 {
+	const struct dmi_system_id *dmi_id;
+
+	dmi_id = dmi_first_match(upside_down_sensor_dmi_ids);
+	if (dmi_id && acpi_dev_hid_match(adev, dmi_id->driver_data))
+		return 180;
+
 	switch (ssdb->degree) {
 	case IPU_SENSOR_ROTATION_NORMAL:
 		return 0;