From 468288726a315ae0b97a847f5e40fe9c9b8ffd22 Mon Sep 17 00:00:00 2001
From: Naushir Patuck <naush@raspberrypi.com>
Date: Mon, 6 Nov 2023 09:40:50 +0000
Subject: [PATCH 0706/1085] drivers: media: imx477: Add V4L2_CID_LINK_FREQ
 control

Add V4L2_CID_LINK_FREQ as a read-only control with a value of 450 Mhz.
This will be used by the CFE driver to corretly setup the DPHY timing
parameters in the CSI-2 block.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
---
 drivers/media/i2c/imx477.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

--- a/drivers/media/i2c/imx477.c
+++ b/drivers/media/i2c/imx477.c
@@ -164,6 +164,10 @@ struct imx477_mode {
 	struct imx477_reg_list reg_list;
 };
 
+static const s64 imx477_link_freq_menu[] = {
+	IMX477_DEFAULT_LINK_FREQ,
+};
+
 static const struct imx477_reg mode_common_regs[] = {
 	{0x0136, 0x18},
 	{0x0137, 0x00},
@@ -1110,6 +1114,7 @@ struct imx477 {
 	struct v4l2_ctrl_handler ctrl_handler;
 	/* V4L2 Controls */
 	struct v4l2_ctrl *pixel_rate;
+	struct v4l2_ctrl *link_freq;
 	struct v4l2_ctrl *exposure;
 	struct v4l2_ctrl *vflip;
 	struct v4l2_ctrl *hflip;
@@ -1997,6 +2002,15 @@ static int imx477_init_controls(struct i
 					       IMX477_PIXEL_RATE, 1,
 					       IMX477_PIXEL_RATE);
 
+	/* LINK_FREQ is also read only */
+	imx477->link_freq =
+		v4l2_ctrl_new_int_menu(ctrl_hdlr, &imx477_ctrl_ops,
+				       V4L2_CID_LINK_FREQ,
+				       ARRAY_SIZE(imx477_link_freq_menu) - 1, 0,
+				       imx477_link_freq_menu);
+	if (imx477->link_freq)
+		imx477->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
 	/*
 	 * Create the controls here, but mode specific limits are setup
 	 * in the imx477_set_framing_limits() call below.
