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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 90e13b6d4c
commit e7dcca3471
1 changed files with 31 additions and 1 deletions
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32
drivers/media/i2c/adv7180.c
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@@ -189,6 +189,16 @@
/* Initial number of frames to skip to avoid possible garbage */ /* Initial number of frames to skip to avoid possible garbage */
#define ADV7180_NUM_OF_SKIP_FRAMES 2 #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; static int dbg_input;
module_param(dbg_input, int, 0644); module_param(dbg_input, int, 0644);
MODULE_PARM_DESC(dbg_input, "Input number (0-31)"); MODULE_PARM_DESC(dbg_input, "Input number (0-31)");
@@ -228,6 +238,7 @@ struct adv7180_state {
const struct adv7180_chip_info *chip_info; const struct adv7180_chip_info *chip_info;
enum v4l2_field field; enum v4l2_field field;
bool force_bt656_4; bool force_bt656_4;
struct v4l2_ctrl *link_freq;
}; };
#define to_adv7180_sd(_ctrl) (&container_of(_ctrl->handler, \ #define to_adv7180_sd(_ctrl) (&container_of(_ctrl->handler, \
struct adv7180_state, \ struct adv7180_state, \
@@ -621,6 +632,9 @@ static int adv7180_s_ctrl(struct v4l2_ctrl *ctrl)
if (ret) if (ret)
return ret; return ret;
if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
goto unlock;
val = ctrl->val; val = ctrl->val;
switch (ctrl->id) { switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS: case V4L2_CID_BRIGHTNESS:
@@ -662,6 +676,7 @@ static int adv7180_s_ctrl(struct v4l2_ctrl *ctrl)
ret = -EINVAL; ret = -EINVAL;
} }
unlock:
mutex_unlock(&state->mutex); mutex_unlock(&state->mutex);
return ret; return ret;
} }
@@ -682,7 +697,7 @@ static const struct v4l2_ctrl_config adv7180_ctrl_fast_switch = {
static int adv7180_init_controls(struct adv7180_state *state) 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_ctrl_new_std(&state->ctrl_hdl, &adv7180_ctrl_ops,
V4L2_CID_BRIGHTNESS, ADV7180_BRI_MIN, V4L2_CID_BRIGHTNESS, ADV7180_BRI_MIN,
@@ -704,6 +719,17 @@ static int adv7180_init_controls(struct adv7180_state *state)
0, ARRAY_SIZE(test_pattern_menu) - 1, 0, ARRAY_SIZE(test_pattern_menu) - 1,
test_pattern_menu); 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; state->sd.ctrl_handler = &state->ctrl_hdl;
if (state->ctrl_hdl.error) { if (state->ctrl_hdl.error) {
int err = state->ctrl_hdl.error; int err = state->ctrl_hdl.error;
@@ -836,6 +862,10 @@ static int adv7180_set_pad_format(struct v4l2_subdev *sd,
adv7180_set_power(state, false); adv7180_set_power(state, false);
adv7180_set_field_mode(state); adv7180_set_field_mode(state);
adv7180_set_power(state, true); 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 { } else {
framefmt = v4l2_subdev_get_try_format(sd, sd_state, 0); framefmt = v4l2_subdev_get_try_format(sd, sd_state, 0);