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[media] adv7180: Add fast switch support

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In fast switch mode the adv7180 (and similar) can lock onto a new signal
faster when switching between different inputs. As a downside though it is
no longer able to auto-detect the incoming format.

The fast switch mode is exposed as a boolean v4l control that allows
userspace applications to either enable or disable fast switch mode.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Federico Vaga <federico.vaga@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Lars-Peter Clausen 2015-01-23 12:52:33 -03:00 committed by Mauro Carvalho Chehab
parent 851a54effb
commit 08b717c2ae
2 changed files with 33 additions and 0 deletions
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29
drivers/media/i2c/adv7180.c
View File

@ -127,6 +127,9 @@
#define ADV7180_REG_VPP_SLAVE_ADDR 0xFD
#define ADV7180_REG_CSI_SLAVE_ADDR 0xFE
#define ADV7180_REG_FLCONTROL 0x40e0
#define ADV7180_FLCONTROL_FL_ENABLE 0x1
#define ADV7180_CSI_REG_PWRDN 0x00
#define ADV7180_CSI_PWRDN 0x80
@ -164,6 +167,8 @@
#define ADV7180_DEFAULT_CSI_I2C_ADDR 0x44
#define ADV7180_DEFAULT_VPP_I2C_ADDR 0x42
#define V4L2_CID_ADV_FAST_SWITCH (V4L2_CID_USER_ADV7180_BASE + 0x00)
struct adv7180_state;
#define ADV7180_FLAG_RESET_POWERED BIT(0)
@ -508,6 +513,18 @@ static int adv7180_s_ctrl(struct v4l2_ctrl *ctrl)
break;
ret = adv7180_write(state, ADV7180_REG_SD_SAT_CR, val);
break;
case V4L2_CID_ADV_FAST_SWITCH:
if (ctrl->val) {
/* ADI required write */
adv7180_write(state, 0x80d9, 0x44);
adv7180_write(state, ADV7180_REG_FLCONTROL,
ADV7180_FLCONTROL_FL_ENABLE);
} else {
/* ADI required write */
adv7180_write(state, 0x80d9, 0xc4);
adv7180_write(state, ADV7180_REG_FLCONTROL, 0x00);
}
break;
default:
ret = -EINVAL;
}
@ -520,6 +537,16 @@ static const struct v4l2_ctrl_ops adv7180_ctrl_ops = {
.s_ctrl = adv7180_s_ctrl,
};
static const struct v4l2_ctrl_config adv7180_ctrl_fast_switch = {
.ops = &adv7180_ctrl_ops,
.id = V4L2_CID_ADV_FAST_SWITCH,
.name = "Fast Switching",
.type = V4L2_CTRL_TYPE_BOOLEAN,
.min = 0,
.max = 1,
.step = 1,
};
static int adv7180_init_controls(struct adv7180_state *state)
{
v4l2_ctrl_handler_init(&state->ctrl_hdl, 4);
@ -536,6 +563,8 @@ static int adv7180_init_controls(struct adv7180_state *state)
v4l2_ctrl_new_std(&state->ctrl_hdl, &adv7180_ctrl_ops,
V4L2_CID_HUE, ADV7180_HUE_MIN,
ADV7180_HUE_MAX, 1, ADV7180_HUE_DEF);
v4l2_ctrl_new_custom(&state->ctrl_hdl, &adv7180_ctrl_fast_switch, NULL);
state->sd.ctrl_handler = &state->ctrl_hdl;
if (state->ctrl_hdl.error) {
int err = state->ctrl_hdl.error;

4
include/uapi/linux/v4l2-controls.h
View File

@ -170,6 +170,10 @@ enum v4l2_colorfx {
* We reserve 16 controls for this driver. */
#define V4L2_CID_USER_SAA7134_BASE (V4L2_CID_USER_BASE + 0x1060)
/* The base for the adv7180 driver controls.
* We reserve 16 controls for this driver. */
#define V4L2_CID_USER_ADV7180_BASE (V4L2_CID_USER_BASE + 0x1070)
/* MPEG-class control IDs */
/* The MPEG controls are applicable to all codec controls
* and the 'MPEG' part of the define is historical */