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[media] vivid: SDR cap: add control for FM deviation 

Add user control to adjust generated FM deviation.
Default it to 75kHz like public FM radio broadcast.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Antti Palosaari 2015-09-01 20:04:50 -03:00 committed by Mauro Carvalho Chehab
parent 655e9780ab
commit f335c3f229
3 changed files with 42 additions and 2 deletions
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1
drivers/media/platform/vivid/vivid-core.h
View File

@ -451,6 +451,7 @@ struct vivid_dev {
unsigned sdr_buffersize;
unsigned sdr_adc_freq;
unsigned sdr_fm_freq;
unsigned sdr_fm_deviation;
int sdr_fixp_src_phase;
int sdr_fixp_mod_phase;

37
drivers/media/platform/vivid/vivid-ctrls.c
View File

@ -99,6 +99,7 @@
#define VIVID_CID_RADIO_TX_RDS_BLOCKIO (VIVID_CID_VIVID_BASE + 94)
#define VIVID_CID_SDR_CAP_FM_DEVIATION (VIVID_CID_VIVID_BASE + 110)
/* General User Controls */
@ -1257,6 +1258,36 @@ static const struct v4l2_ctrl_config vivid_ctrl_radio_tx_rds_blockio = {
};
/* SDR Capture Controls */
static int vivid_sdr_cap_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct vivid_dev *dev = container_of(ctrl->handler, struct vivid_dev, ctrl_hdl_sdr_cap);
switch (ctrl->id) {
case VIVID_CID_SDR_CAP_FM_DEVIATION:
dev->sdr_fm_deviation = ctrl->val;
break;
}
return 0;
}
static const struct v4l2_ctrl_ops vivid_sdr_cap_ctrl_ops = {
.s_ctrl = vivid_sdr_cap_s_ctrl,
};
static const struct v4l2_ctrl_config vivid_ctrl_sdr_cap_fm_deviation = {
.ops = &vivid_sdr_cap_ctrl_ops,
.id = VIVID_CID_SDR_CAP_FM_DEVIATION,
.name = "FM Deviation",
.type = V4L2_CTRL_TYPE_INTEGER,
.min = 100,
.max = 200000,
.def = 75000,
.step = 1,
};
static const struct v4l2_ctrl_config vivid_ctrl_class = {
.ops = &vivid_user_gen_ctrl_ops,
.flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
@ -1314,7 +1345,7 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
v4l2_ctrl_new_custom(hdl_radio_rx, &vivid_ctrl_class, NULL);
v4l2_ctrl_handler_init(hdl_radio_tx, 17);
v4l2_ctrl_new_custom(hdl_radio_tx, &vivid_ctrl_class, NULL);
v4l2_ctrl_handler_init(hdl_sdr_cap, 18);
v4l2_ctrl_handler_init(hdl_sdr_cap, 19);
v4l2_ctrl_new_custom(hdl_sdr_cap, &vivid_ctrl_class, NULL);
/* User Controls */
@ -1545,6 +1576,10 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
&vivid_radio_tx_ctrl_ops,
V4L2_CID_RDS_TX_MUSIC_SPEECH, 0, 1, 1, 1);
}
if (dev->has_sdr_cap) {
v4l2_ctrl_new_custom(hdl_sdr_cap,
&vivid_ctrl_sdr_cap_fm_deviation, NULL);
}
if (hdl_user_gen->error)
return hdl_user_gen->error;
if (hdl_user_vid->error)

6
drivers/media/platform/vivid/vivid-sdr-cap.c
View File

@ -22,6 +22,7 @@
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/math64.h>
#include <linux/videodev2.h>
#include <linux/v4l2-dv-timings.h>
#include <media/v4l2-common.h>
@ -488,12 +489,14 @@ int vidioc_try_fmt_sdr_cap(struct file *file, void *fh, struct v4l2_format *f)
#define FIXP_N (15)
#define FIXP_FRAC (1 << FIXP_N)
#define FIXP_2PI ((int)(2 * 3.141592653589 * FIXP_FRAC))
#define M_100000PI (3.14159 * 100000)
void vivid_sdr_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
{
u8 *vbuf = vb2_plane_vaddr(&buf->vb, 0);
unsigned long i;
unsigned long plane_size = vb2_plane_size(&buf->vb, 0);
s64 s64tmp;
s32 src_phase_step;
s32 mod_phase_step;
s32 fixp_i;
@ -515,7 +518,8 @@ void vivid_sdr_cap_process(struct vivid_dev *dev, struct vivid_buffer *buf)
FIXP_2PI) >> (31 - FIXP_N);
dev->sdr_fixp_src_phase += src_phase_step;
dev->sdr_fixp_mod_phase += mod_phase_step / 4;
s64tmp = (s64) mod_phase_step * dev->sdr_fm_deviation;
dev->sdr_fixp_mod_phase += div_s64(s64tmp, M_100000PI);
/*
* Transfer phases to [0 / 2xPI] in order to avoid variable