On Tue Sep 29 12:26:59 2026 +0300, Ruslan Koreev wrote:
> Add the ACPI HID Lenovo uses for the ST VD55G1 IR camera of the ThinkPad
> X1 Carbon Gen 14. The firmware describes one CSI-2 data lane and, as
> usual, no link frequency, so the value has to come from this table; the
> vd55g1 driver requires exactly one.
>
> Use 402 MHz (804 Mbps). The sensor derives its MIPI rate and clock tree
> from this value and the IPU7 CSI-2 receiver reads the same value back
> through V4L2_CID_LINK_FREQ, so both ends agree by construction. At
> 804 Mbps a full-width 10-bit line takes about 11 us on the link, which
> allows well over 100 fps at full resolution; lower rates lengthen every
> line proportionally. The rate is in the lower half of the 250 to
> 1200 Mbps range the sensor supports and is the one validated on the
> hardware, where 804x704 streams at 58 fps.
>
> Signed-off-by: Ruslan Koreev <[email protected]>
> Acked-by: Benjamin Mugnier <[email protected]>
> Signed-off-by: Sakari Ailus <[email protected]>
Patch committed.
Thanks,
Sakari Ailus
drivers/media/pci/intel/ipu-bridge.c | 2 ++
1 file changed, 2 insertions(+)
---
diff --git a/drivers/media/pci/intel/ipu-bridge.c
b/drivers/media/pci/intel/ipu-bridge.c
index e476e269a50a..8bd20089636e 100644
--- a/drivers/media/pci/intel/ipu-bridge.c
+++ b/drivers/media/pci/intel/ipu-bridge.c
@@ -122,6 +122,8 @@ static const struct ipu_sensor_config
ipu_supported_sensors[] = {
IPU_SENSOR_CONFIG("SONY471A", 1, 200000000),
/* Sony IMX471 (found on Lenovo X1 Carbon G14) */
IPU_SENSOR_CONFIG("TBE20A0", 1, 200000000),
+ /* STMicroelectronics VD55G1 (found on Lenovo X1 Carbon G14) */
+ IPU_SENSOR_CONFIG("TBE20A1", 1, 402000000),
/* Toshiba T4KA3 */
IPU_SENSOR_CONFIG("XMCC0003", 1, 321468000),
};
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