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[media] tw686x: Support VIDIOC_{S,G}_PARM ioctls 

Now that the frame rate can be properly set, this commit adds support
for S_PARM and G_PARM.

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Ezequiel Garcia 2016-06-28 23:17:35 -03:00 committed by Mauro Carvalho Chehab
parent fb66852d4c
commit 85c30a7272
1 changed files with 43 additions and 3 deletions
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46
drivers/media/pci/tw686x/tw686x-video.c
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@ -408,9 +408,6 @@ static void tw686x_set_framerate(struct tw686x_video_channel *vc,
{
unsigned int i;
if (vc->fps == fps)
return;
i = tw686x_fps_idx(fps, TW686X_MAX_FPS(vc->video_standard));
reg_write(vc->dev, VIDEO_FIELD_CTRL[vc->ch], fps_map[i]);
vc->fps = tw686x_real_fps(i, TW686X_MAX_FPS(vc->video_standard));
@ -813,6 +810,12 @@ static int tw686x_s_std(struct file *file, void *priv, v4l2_std_id id)
ret = tw686x_g_fmt_vid_cap(file, priv, &f);
if (!ret)
tw686x_s_fmt_vid_cap(file, priv, &f);
/*
* Frame decimation depends on the chosen standard,
* so reset it to the current value.
*/
tw686x_set_framerate(vc, vc->fps);
return 0;
}
@ -882,6 +885,40 @@ static int tw686x_g_std(struct file *file, void *priv, v4l2_std_id *id)
return 0;
}
static int tw686x_g_parm(struct file *file, void *priv,
struct v4l2_streamparm *sp)
{
struct tw686x_video_channel *vc = video_drvdata(file);
struct v4l2_captureparm *cp = &sp->parm.capture;
if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
sp->parm.capture.readbuffers = 3;
cp->capability = V4L2_CAP_TIMEPERFRAME;
cp->timeperframe.numerator = 1;
cp->timeperframe.denominator = vc->fps;
return 0;
}
static int tw686x_s_parm(struct file *file, void *priv,
struct v4l2_streamparm *sp)
{
struct tw686x_video_channel *vc = video_drvdata(file);
struct v4l2_captureparm *cp = &sp->parm.capture;
unsigned int denominator = cp->timeperframe.denominator;
unsigned int numerator = cp->timeperframe.numerator;
unsigned int fps;
if (vb2_is_busy(&vc->vidq))
return -EBUSY;
fps = (!numerator || !denominator) ? 0 : denominator / numerator;
if (vc->fps != fps)
tw686x_set_framerate(vc, fps);
return tw686x_g_parm(file, priv, sp);
}
static int tw686x_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
@ -968,6 +1005,9 @@ static const struct v4l2_ioctl_ops tw686x_video_ioctl_ops = {
.vidioc_g_std = tw686x_g_std,
.vidioc_s_std = tw686x_s_std,
.vidioc_g_parm = tw686x_g_parm,
.vidioc_s_parm = tw686x_s_parm,
.vidioc_enum_input = tw686x_enum_input,
.vidioc_g_input = tw686x_g_input,
.vidioc_s_input = tw686x_s_input,