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| author | Pantelis Koukousoulas <pakt223@freemail.gr> | 2006-12-28 05:05:19 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-02-21 18:34:21 +0300 |
| commit | 275b2e283b139bee19e7de5929d01484b8e3ee51 (patch) | |
| tree | dbef39c440161762a14d119486dbc1fcd99c4455 /drivers/media/video/pvrusb2/pvrusb2-encoder.c | |
| parent | 0b600512860cab5a0bb4647f5f726a91bce2633c (diff) | |
| download | linux-275b2e283b139bee19e7de5929d01484b8e3ee51.tar.xz | |
V4L/DVB (5034): Pvrusb2: Enable radio mode round #1
This is the logic that supports switching modes via e.g.,
echo radio > /sys/class/pvrusb2/sn-*/ctl_input/cur_val.
To do the mode switching we need to:
a) broadcast AUDC_SET_RADIO and
b) issue the CX2341X_ENC_MUTE_VIDEO command to the encoder.
The first is done by adding a new pvr2_i2c_op and having it trigger on
input change, the second by adding this command in pvr2_encoder_start()
and requesting an encoder restart on input change by setting
stale_subsys_mask appropriately.
The clues about AUDC_SET_RADIO and CX2341X_ENC_MUTE_VIDEO were kindly
provided by Hans Verkuil on the pvrusb2 mailing list. The idea to
implement mode switching this way (on input change) is due to Mike Isely.
Why AUDC_SET_RADIO/VIDIOC_S_STD are used for switching? I can 't be sure,
but I think this can be traced to a cornell student being the first to
implement radio support in ivtv "as a different standard". I think the
rest just evolved from there (it 's in the ivtv ML archives).
Signed-off-by: Pantelis Koukousoulas <pakt223@freemail.gr>
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-encoder.c')
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-encoder.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-encoder.c b/drivers/media/video/pvrusb2/pvrusb2-encoder.c index c94f97b79392..d094cac9f7a5 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-encoder.c +++ b/drivers/media/video/pvrusb2/pvrusb2-encoder.c @@ -360,6 +360,9 @@ int pvr2_encoder_start(struct pvr2_hdw *hdw) pvr2_hdw_gpio_chg_dir(hdw,0xffffffff,0x00000481); pvr2_hdw_gpio_chg_out(hdw,0xffffffff,0x00000000); + pvr2_encoder_vcmd(hdw,CX2341X_ENC_MUTE_VIDEO,1, + hdw->input_val == PVR2_CVAL_INPUT_RADIO ? 1 : 0); + if (hdw->config == pvr2_config_vbi) { status = pvr2_encoder_vcmd(hdw,CX2341X_ENC_START_CAPTURE,2, 0x01,0x14); |