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media: ov5640: Add LINK_FREQ control

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Add the V4L2_CID_LINK_FREQ control to the ov5640 driver.
Make the control read-only for the moment.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Jacopo Mondi
2022-05-13 15:13:53 +01:00
committed by Mauro Carvalho Chehab
parent 2d7671f609
commit 7a3b8d4bda
1 changed files with 26 additions and 0 deletions
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26
drivers/media/i2c/ov5640.c
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@ -141,6 +141,24 @@ static const u32 ov5640_pixel_rates[] = {
[OV5640_PIXEL_RATE_48M] = 48000000,
};
/*
* MIPI CSI-2 link frequencies.
*
* Derived from the above defined pixel rate for bpp = (8, 16, 24) and
* data_lanes = (1, 2)
*
* link_freq = (pixel_rate * bpp) / (2 * data_lanes)
*/
static const s64 ov5640_csi2_link_freqs[] = {
992000000, 888000000, 768000000, 744000000, 672000000, 672000000,
592000000, 592000000, 576000000, 576000000, 496000000, 496000000,
384000000, 384000000, 384000000, 336000000, 296000000, 288000000,
248000000, 192000000, 192000000, 192000000, 96000000,
};
/* Link freq for default mode: UYVY 16 bpp, 2 data lanes. */
#define OV5640_DEFAULT_LINK_FREQ 13
enum ov5640_format_mux {
OV5640_FMT_MUX_YUV422 = 0,
OV5640_FMT_MUX_RGB,
@ -258,6 +276,7 @@ struct ov5640_mode_info {
struct ov5640_ctrls {
struct v4l2_ctrl_handler handler;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *link_freq;
struct {
struct v4l2_ctrl *auto_exp;
struct v4l2_ctrl *exposure;
@ -2855,6 +2874,12 @@ static int ov5640_init_controls(struct ov5640_dev *sensor)
ov5640_pixel_rates[0], 1,
ov5640_pixel_rates[mode->pixel_rate]);
ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, ops,
V4L2_CID_LINK_FREQ,
ARRAY_SIZE(ov5640_csi2_link_freqs) - 1,
OV5640_DEFAULT_LINK_FREQ,
ov5640_csi2_link_freqs);
/* Auto/manual white balance */
ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
V4L2_CID_AUTO_WHITE_BALANCE,
@ -2903,6 +2928,7 @@ static int ov5640_init_controls(struct ov5640_dev *sensor)
}
ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;