drivers: media: arducam_64mp: Add V4L2_CID_LINK_FREQ control

Add V4L2_CID_LINK_FREQ as a read-only control with a value of 456 Mhz.
This will be used by the CFE driver to corretly setup the DPHY timing
parameters in the CSI-2 block.

Signed-off-by: Lee Jackson <lee.jackson@arducam.com>

diff --git a/drivers/media/i2c/arducam_64mp.c b/drivers/media/i2c/arducam_64mp.c
index d4261af..0d6a2c4 100644 (file)
--- a/drivers/media/i2c/arducam_64mp.c
+++ b/drivers/media/i2c/arducam_64mp.c
@@ -143,6 +143,10 @@ struct arducam_64mp_mode {
        struct arducam_64mp_reg_list reg_list;
 };
 
+static const s64 arducam_64mp_link_freq_menu[] = {
+       ARDUCAM_64MP_DEFAULT_LINK_FREQ,
+};
+
 static const struct arducam_64mp_reg mode_common_regs[] = {
        {0x0100, 0x00},
        {0x0136, 0x18},
@@ -2272,9 +2276,11 @@ static int arducam_64mp_init_controls(struct arducam_64mp *arducam_64mp)
        struct v4l2_ctrl_handler *ctrl_hdlr;
        struct i2c_client *client = v4l2_get_subdevdata(&arducam_64mp->sd);
        struct v4l2_fwnode_device_properties props;
+       struct v4l2_ctrl *link_freq;
        unsigned int i;
        int ret;
        u8 test_pattern_max;
+       u8 link_freq_max;
 
        ctrl_hdlr = &arducam_64mp->ctrl_handler;
        ret = v4l2_ctrl_handler_init(ctrl_hdlr, 16);
@@ -2292,6 +2298,16 @@ static int arducam_64mp_init_controls(struct arducam_64mp *arducam_64mp)
                                                     ARDUCAM_64MP_PIXEL_RATE, 1,
                                                     ARDUCAM_64MP_PIXEL_RATE);
 
+       /* LINK_FREQ is also read only */
+       link_freq_max = ARRAY_SIZE(arducam_64mp_link_freq_menu) - 1;
+       link_freq =
+               v4l2_ctrl_new_int_menu(ctrl_hdlr, &arducam_64mp_ctrl_ops,
+                                      V4L2_CID_LINK_FREQ,
+                                      link_freq_max, 0,
+                                      arducam_64mp_link_freq_menu);
+       if (link_freq)
+               link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
        /*
         * Create the controls here, but mode specific limits are setup
         * in the arducam_64mp_set_framing_limits() call below.