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Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6:
  [media] msp3400: fill in v4l2_tuner based on vt->type field
  [media] tuner-core.c: don't change type field in g_tuner or g_frequency
  [media] cx18/ivtv: fix g_tuner support
  [media] tuner-core: power up tuner when called with s_power(1)
  [media] v4l2-ioctl.c: check for valid tuner type in S_HW_FREQ_SEEK
  [media] tuner-core: simplify the standard fixup
  [media] tuner-core/v4l2-subdev: document that the type field has to be filled in
  [media] v4l2-subdev.h: remove unused s_mode tuner op
  [media] feature-removal-schedule: change in how radio device nodes are handled
  [media] bttv: fix s_tuner for radio
  [media] pvrusb2: fix g/s_tuner support
  [media] v4l2-ioctl.c: prefill tuner type for g_frequency and g/s_tuner
  [media] tuner-core: fix tuner_resume: use t->mode instead of t->type
  [media] tuner-core: fix s_std and s_tuner
This commit is contained in:
Linus Torvalds 2011-07-11 16:43:27 -07:00
parent 9ddf7f5058 ddc6ff31cc
commit c15000b40d
9 changed files with 175 additions and 140 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
Documentation/feature-removal-schedule.txt
View File

@ -583,3 +583,25 @@ Why: Superseded by the UVCIOC_CTRL_QUERY ioctl.
Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
----------------------------
What: For VIDIOC_S_FREQUENCY the type field must match the device node's type.
If not, return -EINVAL.
When: 3.2
Why: It makes no sense to switch the tuner to radio mode by calling
VIDIOC_S_FREQUENCY on a video node, or to switch the tuner to tv mode by
calling VIDIOC_S_FREQUENCY on a radio node. This is the first step of a
move to more consistent handling of tv and radio tuners.
Who: Hans Verkuil <hans.verkuil@cisco.com>
----------------------------
What: Opening a radio device node will no longer automatically switch the
tuner mode from tv to radio.
When: 3.3
Why: Just opening a V4L device should not change the state of the hardware
like that. It's very unexpected and against the V4L spec. Instead, you
switch to radio mode by calling VIDIOC_S_FREQUENCY. This is the second
and last step of the move to consistent handling of tv and radio tuners.
Who: Hans Verkuil <hans.verkuil@cisco.com>
----------------------------

2
drivers/media/video/bt8xx/bttv-driver.c
View File

@ -3474,7 +3474,7 @@ static int radio_s_tuner(struct file *file, void *priv,
if (0 != t->index)
return -EINVAL;
bttv_call_all(btv, tuner, g_tuner, t);
bttv_call_all(btv, tuner, s_tuner, t);
return 0;
}

8
drivers/media/video/cx18/cx18-ioctl.c
View File

@ -695,14 +695,10 @@ static int cx18_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
cx18_call_all(cx, tuner, g_tuner, vt);
if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) {
if (vt->type == V4L2_TUNER_RADIO)
strlcpy(vt->name, "cx18 Radio Tuner", sizeof(vt->name));
vt->type = V4L2_TUNER_RADIO;
} else {
else
strlcpy(vt->name, "cx18 TV Tuner", sizeof(vt->name));
vt->type = V4L2_TUNER_ANALOG_TV;
}
return 0;
}

8
drivers/media/video/ivtv/ivtv-ioctl.c
View File

@ -1184,14 +1184,10 @@ static int ivtv_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
ivtv_call_all(itv, tuner, g_tuner, vt);
if (test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) {
if (vt->type == V4L2_TUNER_RADIO)
strlcpy(vt->name, "ivtv Radio Tuner", sizeof(vt->name));
vt->type = V4L2_TUNER_RADIO;
} else {
else
strlcpy(vt->name, "ivtv TV Tuner", sizeof(vt->name));
vt->type = V4L2_TUNER_ANALOG_TV;
}
return 0;
}

12
drivers/media/video/msp3400-driver.c
View File

@ -480,12 +480,14 @@ static int msp_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
struct msp_state *state = to_state(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (state->radio)
if (vt->type != V4L2_TUNER_ANALOG_TV)
return 0;
if (state->opmode == OPMODE_AUTOSELECT)
msp_detect_stereo(client);
vt->audmode = state->audmode;
vt->rxsubchans = state->rxsubchans;
if (!state->radio) {
if (state->opmode == OPMODE_AUTOSELECT)
msp_detect_stereo(client);
vt->rxsubchans = state->rxsubchans;
}
vt->audmode = state->audmode;
vt->capability |= V4L2_TUNER_CAP_STEREO |
V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
return 0;

4
drivers/media/video/pvrusb2/pvrusb2-hdw.c
View File

@ -3046,6 +3046,8 @@ static void pvr2_subdev_update(struct pvr2_hdw *hdw)
if (hdw->input_dirty || hdw->audiomode_dirty || hdw->force_dirty) {
struct v4l2_tuner vt;
memset(&vt, 0, sizeof(vt));
vt.type = (hdw->input_val == PVR2_CVAL_INPUT_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
vt.audmode = hdw->audiomode_val;
v4l2_device_call_all(&hdw->v4l2_dev, 0, tuner, s_tuner, &vt);
}
@ -5171,6 +5173,8 @@ void pvr2_hdw_status_poll(struct pvr2_hdw *hdw)
{
struct v4l2_tuner *vtp = &hdw->tuner_signal_info;
memset(vtp, 0, sizeof(*vtp));
vtp->type = (hdw->input_val == PVR2_CVAL_INPUT_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
hdw->tuner_signal_stale = 0;
/* Note: There apparently is no replacement for VIDIOC_CROPCAP
using v4l2-subdev - therefore we can't support that AT ALL right

231
drivers/media/video/tuner-core.c
View File

@ -724,19 +724,15 @@ static inline int check_mode(struct tuner *t, enum v4l2_tuner_type mode)
}
/**
* set_mode_freq - Switch tuner to other mode.
* @client: struct i2c_client pointer
* set_mode - Switch tuner to other mode.
* @t: a pointer to the module's internal struct_tuner
* @mode: enum v4l2_type (radio or TV)
* @freq: frequency to set (0 means to use the previous one)
*
* If tuner doesn't support the needed mode (radio or TV), prints a
* debug message and returns -EINVAL, changing its state to standby.
* Otherwise, changes the state and sets frequency to the last value, if
* the tuner can sleep or if it supports both Radio and TV.
* Otherwise, changes the mode and returns 0.
*/
static int set_mode_freq(struct i2c_client *client, struct tuner *t,
enum v4l2_tuner_type mode, unsigned int freq)
static int set_mode(struct tuner *t, enum v4l2_tuner_type mode)
{
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
@ -752,19 +748,29 @@ static int set_mode_freq(struct i2c_client *client, struct tuner *t,
t->mode = mode;
tuner_dbg("Changing to mode %d\n", mode);
}
if (t->mode == V4L2_TUNER_RADIO) {
if (freq)
t->radio_freq = freq;
set_radio_freq(client, t->radio_freq);
} else {
if (freq)
t->tv_freq = freq;
set_tv_freq(client, t->tv_freq);
}
return 0;
}
/**
* set_freq - Set the tuner to the desired frequency.
* @t: a pointer to the module's internal struct_tuner
* @freq: frequency to set (0 means to use the current frequency)
*/
static void set_freq(struct tuner *t, unsigned int freq)
{
struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
if (t->mode == V4L2_TUNER_RADIO) {
if (!freq)
freq = t->radio_freq;
set_radio_freq(client, freq);
} else {
if (!freq)
freq = t->tv_freq;
set_tv_freq(client, freq);
}
}
/*
* Functions that are specific for TV mode
*/
@ -817,7 +823,8 @@ static void set_tv_freq(struct i2c_client *c, unsigned int freq)
/**
* tuner_fixup_std - force a given video standard variant
*
* @t: tuner internal struct
* @t: tuner internal struct
* @std: TV standard
*
* A few devices or drivers have problem to detect some standard variations.
* On other operational systems, the drivers generally have a per-country
@ -827,57 +834,39 @@ static void set_tv_freq(struct i2c_client *c, unsigned int freq)
* to distinguish all video standard variations, a modprobe parameter can
* be used to force a video standard match.
*/
static int tuner_fixup_std(struct tuner *t)
static v4l2_std_id tuner_fixup_std(struct tuner *t, v4l2_std_id std)
{
if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) {
if (pal[0] != '-' && (std & V4L2_STD_PAL) == V4L2_STD_PAL) {
switch (pal[0]) {
case '6':
tuner_dbg("insmod fixup: PAL => PAL-60\n");
t->std = V4L2_STD_PAL_60;
break;
return V4L2_STD_PAL_60;
case 'b':
case 'B':
case 'g':
case 'G':
tuner_dbg("insmod fixup: PAL => PAL-BG\n");
t->std = V4L2_STD_PAL_BG;
break;
return V4L2_STD_PAL_BG;
case 'i':
case 'I':
tuner_dbg("insmod fixup: PAL => PAL-I\n");
t->std = V4L2_STD_PAL_I;
break;
return V4L2_STD_PAL_I;
case 'd':
case 'D':
case 'k':
case 'K':
tuner_dbg("insmod fixup: PAL => PAL-DK\n");
t->std = V4L2_STD_PAL_DK;
break;
return V4L2_STD_PAL_DK;
case 'M':
case 'm':
tuner_dbg("insmod fixup: PAL => PAL-M\n");
t->std = V4L2_STD_PAL_M;
break;
return V4L2_STD_PAL_M;
case 'N':
case 'n':
if (pal[1] == 'c' || pal[1] == 'C') {
tuner_dbg("insmod fixup: PAL => PAL-Nc\n");
t->std = V4L2_STD_PAL_Nc;
} else {
tuner_dbg("insmod fixup: PAL => PAL-N\n");
t->std = V4L2_STD_PAL_N;
}
break;
case '-':
/* default parameter, do nothing */
break;
if (pal[1] == 'c' || pal[1] == 'C')
return V4L2_STD_PAL_Nc;
return V4L2_STD_PAL_N;
default:
tuner_warn("pal= argument not recognised\n");
break;
}
}
if ((t->std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
if (secam[0] != '-' && (std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
switch (secam[0]) {
case 'b':
case 'B':
@ -885,63 +874,42 @@ static int tuner_fixup_std(struct tuner *t)
case 'G':
case 'h':
case 'H':
tuner_dbg("insmod fixup: SECAM => SECAM-BGH\n");
t->std = V4L2_STD_SECAM_B |
V4L2_STD_SECAM_G |
V4L2_STD_SECAM_H;
break;
return V4L2_STD_SECAM_B |
V4L2_STD_SECAM_G |
V4L2_STD_SECAM_H;
case 'd':
case 'D':
case 'k':
case 'K':
tuner_dbg("insmod fixup: SECAM => SECAM-DK\n");
t->std = V4L2_STD_SECAM_DK;
break;
return V4L2_STD_SECAM_DK;
case 'l':
case 'L':
if ((secam[1] == 'C') || (secam[1] == 'c')) {
tuner_dbg("insmod fixup: SECAM => SECAM-L'\n");
t->std = V4L2_STD_SECAM_LC;
} else {
tuner_dbg("insmod fixup: SECAM => SECAM-L\n");
t->std = V4L2_STD_SECAM_L;
}
break;
case '-':
/* default parameter, do nothing */
break;
if ((secam[1] == 'C') || (secam[1] == 'c'))
return V4L2_STD_SECAM_LC;
return V4L2_STD_SECAM_L;
default:
tuner_warn("secam= argument not recognised\n");
break;
}
}
if ((t->std & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
if (ntsc[0] != '-' && (std & V4L2_STD_NTSC) == V4L2_STD_NTSC) {
switch (ntsc[0]) {
case 'm':
case 'M':
tuner_dbg("insmod fixup: NTSC => NTSC-M\n");
t->std = V4L2_STD_NTSC_M;
break;
return V4L2_STD_NTSC_M;
case 'j':
case 'J':
tuner_dbg("insmod fixup: NTSC => NTSC_M_JP\n");
t->std = V4L2_STD_NTSC_M_JP;
break;
return V4L2_STD_NTSC_M_JP;
case 'k':
case 'K':
tuner_dbg("insmod fixup: NTSC => NTSC_M_KR\n");
t->std = V4L2_STD_NTSC_M_KR;
break;
case '-':
/* default parameter, do nothing */
break;
return V4L2_STD_NTSC_M_KR;
default:
tuner_info("ntsc= argument not recognised\n");
break;
}
}
return 0;
return std;
}
/*
@ -1058,10 +1026,9 @@ static void tuner_status(struct dvb_frontend *fe)
static int tuner_s_radio(struct v4l2_subdev *sd)
{
struct tuner *t = to_tuner(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (set_mode_freq(client, t, V4L2_TUNER_RADIO, 0) == -EINVAL)
return 0;
if (set_mode(t, V4L2_TUNER_RADIO) == 0)
set_freq(t, 0);
return 0;
}
@ -1072,16 +1039,20 @@ static int tuner_s_radio(struct v4l2_subdev *sd)
/**
* tuner_s_power - controls the power state of the tuner
* @sd: pointer to struct v4l2_subdev
* @on: a zero value puts the tuner to sleep
* @on: a zero value puts the tuner to sleep, non-zero wakes it up
*/
static int tuner_s_power(struct v4l2_subdev *sd, int on)
{
struct tuner *t = to_tuner(sd);
struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
/* FIXME: Why this function don't wake the tuner if on != 0 ? */
if (on)
if (on) {
if (t->standby && set_mode(t, t->mode) == 0) {
tuner_dbg("Waking up tuner\n");
set_freq(t, 0);
}
return 0;
}
tuner_dbg("Putting tuner to sleep\n");
t->standby = true;
@ -1093,28 +1064,36 @@ static int tuner_s_power(struct v4l2_subdev *sd, int on)
static int tuner_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct tuner *t = to_tuner(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (set_mode_freq(client, t, V4L2_TUNER_ANALOG_TV, 0) == -EINVAL)
if (set_mode(t, V4L2_TUNER_ANALOG_TV))
return 0;
t->std = std;
tuner_fixup_std(t);
t->std = tuner_fixup_std(t, std);
if (t->std != std)
tuner_dbg("Fixup standard %llx to %llx\n", std, t->std);
set_freq(t, 0);
return 0;
}
static int tuner_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
{
struct tuner *t = to_tuner(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (set_mode_freq(client, t, f->type, f->frequency) == -EINVAL)
return 0;
if (set_mode(t, f->type) == 0)
set_freq(t, f->frequency);
return 0;
}
/**
* tuner_g_frequency - Get the tuned frequency for the tuner
* @sd: pointer to struct v4l2_subdev
* @f: pointer to struct v4l2_frequency
*
* At return, the structure f will be filled with tuner frequency
* if the tuner matches the f->type.
* Note: f->type should be initialized before calling it.
* This is done by either video_ioctl2 or by the bridge driver.
*/
static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
{
struct tuner *t = to_tuner(sd);
@ -1122,8 +1101,7 @@ static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
if (check_mode(t, f->type) == -EINVAL)
return 0;
f->type = t->mode;
if (fe_tuner_ops->get_frequency && !t->standby) {
if (f->type == t->mode && fe_tuner_ops->get_frequency && !t->standby) {
u32 abs_freq;
fe_tuner_ops->get_frequency(&t->fe, &abs_freq);
@ -1131,12 +1109,22 @@ static int tuner_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
DIV_ROUND_CLOSEST(abs_freq * 2, 125) :
DIV_ROUND_CLOSEST(abs_freq, 62500);
} else {
f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
f->frequency = (V4L2_TUNER_RADIO == f->type) ?
t->radio_freq : t->tv_freq;
}
return 0;
}
/**
* tuner_g_tuner - Fill in tuner information
* @sd: pointer to struct v4l2_subdev
* @vt: pointer to struct v4l2_tuner
*
* At return, the structure vt will be filled with tuner information
* if the tuner matches vt->type.
* Note: vt->type should be initialized before calling it.
* This is done by either video_ioctl2 or by the bridge driver.
*/
static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct tuner *t = to_tuner(sd);
@ -1145,48 +1133,58 @@ static int tuner_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
if (check_mode(t, vt->type) == -EINVAL)
return 0;
vt->type = t->mode;
if (analog_ops->get_afc)
if (vt->type == t->mode && analog_ops->get_afc)
vt->afc = analog_ops->get_afc(&t->fe);
if (t->mode == V4L2_TUNER_ANALOG_TV)
if (vt->type == V4L2_TUNER_ANALOG_TV)
vt->capability |= V4L2_TUNER_CAP_NORM;
if (t->mode != V4L2_TUNER_RADIO) {
if (vt->type != V4L2_TUNER_RADIO) {
vt->rangelow = tv_range[0] * 16;
vt->rangehigh = tv_range[1] * 16;
return 0;
}
/* radio mode */
vt->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
if (fe_tuner_ops->get_status) {
u32 tuner_status;
if (vt->type == t->mode) {
vt->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
if (fe_tuner_ops->get_status) {
u32 tuner_status;
fe_tuner_ops->get_status(&t->fe, &tuner_status);
vt->rxsubchans =
(tuner_status & TUNER_STATUS_STEREO) ?
V4L2_TUNER_SUB_STEREO :
V4L2_TUNER_SUB_MONO;
fe_tuner_ops->get_status(&t->fe, &tuner_status);
vt->rxsubchans =
(tuner_status & TUNER_STATUS_STEREO) ?
V4L2_TUNER_SUB_STEREO :
V4L2_TUNER_SUB_MONO;
}
if (analog_ops->has_signal)
vt->signal = analog_ops->has_signal(&t->fe);
vt->audmode = t->audmode;
}
if (analog_ops->has_signal)
vt->signal = analog_ops->has_signal(&t->fe);
vt->capability |= V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
vt->audmode = t->audmode;
vt->rangelow = radio_range[0] * 16000;
vt->rangehigh = radio_range[1] * 16000;
return 0;
}
/**
* tuner_s_tuner - Set the tuner's audio mode
* @sd: pointer to struct v4l2_subdev
* @vt: pointer to struct v4l2_tuner
*
* Sets the audio mode if the tuner matches vt->type.
* Note: vt->type should be initialized before calling it.
* This is done by either video_ioctl2 or by the bridge driver.
*/
static int tuner_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct tuner *t = to_tuner(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (set_mode_freq(client, t, vt->type, 0) == -EINVAL)
if (set_mode(t, vt->type))
return 0;
if (t->mode == V4L2_TUNER_RADIO)
t->audmode = vt->audmode;
set_freq(t, 0);
return 0;
}
@ -1221,7 +1219,8 @@ static int tuner_resume(struct i2c_client *c)
tuner_dbg("resume\n");
if (!t->standby)
set_mode_freq(c, t, t->type, 0);
if (set_mode(t, t->mode) == 0)
set_freq(t, 0);
return 0;
}

18
drivers/media/video/v4l2-ioctl.c
View File

@ -1822,6 +1822,8 @@ static long __video_do_ioctl(struct file *file,
if (!ops->vidioc_g_tuner)
break;
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
ret = ops->vidioc_g_tuner(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, type=%d, "
@ -1840,6 +1842,8 @@ static long __video_do_ioctl(struct file *file,
if (!ops->vidioc_s_tuner)
break;
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
dbgarg(cmd, "index=%d, name=%s, type=%d, "
"capability=0x%x, rangelow=%d, "
"rangehigh=%d, signal=%d, afc=%d, "
@ -1858,6 +1862,8 @@ static long __video_do_ioctl(struct file *file,
if (!ops->vidioc_g_frequency)
break;
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
ret = ops->vidioc_g_frequency(file, fh, p);
if (!ret)
dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
@ -1940,13 +1946,19 @@ static long __video_do_ioctl(struct file *file,
case VIDIOC_S_HW_FREQ_SEEK:
{
struct v4l2_hw_freq_seek *p = arg;
enum v4l2_tuner_type type;
if (!ops->vidioc_s_hw_freq_seek)
break;
type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
dbgarg(cmd,
"tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
p->tuner, p->type, p->seek_upward, p->wrap_around);
ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
"tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u\n",
p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing);
if (p->type != type)
ret = -EINVAL;
else
ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
break;
}
case VIDIOC_ENUM_FRAMESIZES:

10
include/media/v4l2-subdev.h
View File

@ -173,16 +173,20 @@ struct v4l2_subdev_core_ops {
struct v4l2_event_subscription *sub);
};
/* s_mode: switch the tuner to a specific tuner mode. Replacement of s_radio.
/* s_radio: v4l device was opened in radio mode.
s_radio: v4l device was opened in Radio mode, to be replaced by s_mode.
g_frequency: freq->type must be filled in. Normally done by video_ioctl2
or the bridge driver.
g_tuner:
s_tuner: vt->type must be filled in. Normally done by video_ioctl2 or the
bridge driver.
s_type_addr: sets tuner type and its I2C addr.
s_config: sets tda9887 specific stuff, like port1, port2 and qss
*/
struct v4l2_subdev_tuner_ops {
int (*s_mode)(struct v4l2_subdev *sd, enum v4l2_tuner_type);
int (*s_radio)(struct v4l2_subdev *sd);
int (*s_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq);
int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq);