linux-kernel - [PATCH 6/8] USB: serial: ftdi_sio: enable NDI speed hack consistently

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Message-ID: <20251110111212.32702-7-johan@kernel.org>
Date: Mon, 10 Nov 2025 12:12:10 +0100
From: Johan Hovold <johan@...nel.org>
To: Johan Hovold <johan@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ryan Mann <rmann@...gital.com>,
	Andreas Messer <andi@...telmap.de>,
	linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/8] USB: serial: ftdi_sio: enable NDI speed hack consistently

The original submission adding support for NDI EMGUIDE Gemini enabled
the existing NDI speed hack which remaps the 19200 line speed to 1.2
Mbps, but this silently fell out during resubmission.

Enable the speed hack also for the new NDI product for consistency. This
will also allow for cleaning up the implementation without resorting to
overengineering.

Link: https://lore.kernel.org/all/YQXPR01MB49870CB7B3075ADDF88A3FD4DF43A@YQXPR01MB4987.CANPRD01.PROD.OUTLOOK.COM/
Link: https://lore.kernel.org/all/YQXPR01MB4987F1E0DA41E689779E6958DF48A@YQXPR01MB4987.CANPRD01.PROD.OUTLOOK.COM/
Cc: Ryan Mann <rmann@...gital.com>
Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/usb/serial/ftdi_sio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index d583b39b64cc..f5786689697c 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1312,7 +1312,8 @@ static u32 get_ftdi_divisor(struct tty_struct *tty,
 			     (product_id == FTDI_NDI_SPECTRA_SCU_PID)	||
 			     (product_id == FTDI_NDI_FUTURE_2_PID)	||
 			     (product_id == FTDI_NDI_FUTURE_3_PID)	||
-			     (product_id == FTDI_NDI_AURORA_SCU_PID))	&&
+			     (product_id == FTDI_NDI_AURORA_SCU_PID)	||
+			     (product_id == FTDI_NDI_EMGUIDE_GEMINI_PID)) &&
 			    (baud == 19200)) {
 				baud = 1200000;
 			}
-- 
2.51.0