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media: i2c: adv7180: Add support for V4L2_CID_LINK_FREQ

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For CSI2 receivers that need to know the link frequency,
add it as a control to the driver.
Interlaced modes are 216Mbp/s or 108MHz, whilst going through
the I2P to deinterlace gives 432Mb/s or 216MHz.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2023-12-21 18:03:34 +00:00
committed by Dom Cobley
parent f4c43c8f9d
commit d704c3160c
1 changed files with 37 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/media/i2c/adv7180.c
View File

@@ -189,6 +189,16 @@
/* Initial number of frames to skip to avoid possible garbage */
#define ADV7180_NUM_OF_SKIP_FRAMES 2
enum adv7180_link_freq_idx {
INTERLACED_IDX,
I2P_IDX,
};
static const s64 adv7180_link_freqs[] = {
[INTERLACED_IDX] = 108000000,
[I2P_IDX] = 216000000,
};
static int dbg_input;
module_param(dbg_input, int, 0644);
MODULE_PARM_DESC(dbg_input, "Input number (0-31)");
@@ -229,6 +239,7 @@ struct adv7180_state {
const struct adv7180_chip_info *chip_info;
enum v4l2_field field;
bool force_bt656_4;
struct v4l2_ctrl *link_freq;
};
#define to_adv7180_sd(_ctrl) (&container_of(_ctrl->handler, \
struct adv7180_state, \
@@ -625,6 +636,9 @@ static int adv7180_s_ctrl(struct v4l2_ctrl *ctrl)
if (ret)
return ret;
if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
goto unlock;
val = ctrl->val;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
@@ -666,6 +680,7 @@ static int adv7180_s_ctrl(struct v4l2_ctrl *ctrl)
ret = -EINVAL;
}
unlock:
mutex_unlock(&state->mutex);
return ret;
}
@@ -686,7 +701,7 @@ static const struct v4l2_ctrl_config adv7180_ctrl_fast_switch = {
static int adv7180_init_controls(struct adv7180_state *state)
{
v4l2_ctrl_handler_init(&state->ctrl_hdl, 4);
v4l2_ctrl_handler_init(&state->ctrl_hdl, 5);
v4l2_ctrl_new_std(&state->ctrl_hdl, &adv7180_ctrl_ops,
V4L2_CID_BRIGHTNESS, ADV7180_BRI_MIN,
@@ -712,6 +727,17 @@ static int adv7180_init_controls(struct adv7180_state *state)
test_pattern_menu);
}
if (state->chip_info->flags & ADV7180_FLAG_MIPI_CSI2) {
state->link_freq =
v4l2_ctrl_new_int_menu(&state->ctrl_hdl,
&adv7180_ctrl_ops,
V4L2_CID_LINK_FREQ,
ARRAY_SIZE(adv7180_link_freqs) - 1,
0, adv7180_link_freqs);
if (state->link_freq)
state->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
}
state->sd.ctrl_handler = &state->ctrl_hdl;
if (state->ctrl_hdl.error) {
int err = state->ctrl_hdl.error;
@@ -839,7 +865,16 @@ static int adv7180_set_pad_format(struct v4l2_subdev *sd,
ret = adv7180_mbus_fmt(sd, &format->format);
if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
state->field = format->format.field;
if (state->field != format->format.field) {
state->field = format->format.field;
adv7180_set_power(state, false);
adv7180_set_field_mode(state);
adv7180_set_power(state, true);
if (state->chip_info->flags & ADV7180_FLAG_MIPI_CSI2)
__v4l2_ctrl_s_ctrl(state->link_freq,
(state->field == V4L2_FIELD_NONE) ?
I2P_IDX : INTERLACED_IDX);
}
} else {
framefmt = v4l2_subdev_state_get_format(sd_state, 0);
*framefmt = format->format;