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| author | Mike Isely <isely@pobox.com> | 2006-12-27 20:05:19 -0600 |
|---|---|---|
| committer | Mike Isely <isely@pobox.com> | 2006-12-27 20:05:19 -0600 |
| commit | 9cb0dc1a11d13622b9bca84b946d3ce0e1aa1f9b (patch) | |
| tree | 5ee74f5797712f325b68ab4fc0e4f10c16834ddf /linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c | |
| parent | 3a6b5dfd2270a9ddcdf2b81e4dfa9388a343b0cd (diff) | |
| download | mediapointer-dvb-s2-9cb0dc1a11d13622b9bca84b946d3ce0e1aa1f9b.tar.gz mediapointer-dvb-s2-9cb0dc1a11d13622b9bca84b946d3ce0e1aa1f9b.tar.bz2 | |
pvrusb2: Enable radio mode round #1
From: Pantelis Koukousoulas <pakt223@freemail.gr>
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).
--Pantelis
Signed-off-by: Pantelis Koukousoulas <pakt223@freemail.gr>
Signed-off-by: Mike Isely <isely@pobox.com>
Diffstat (limited to 'linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c')
| -rw-r--r-- | linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c b/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c index dbd2466ef..071e55a60 100644 --- a/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c +++ b/linux/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c @@ -40,6 +40,7 @@ #define OP_AUDIORATE 4 #define OP_SIZE 5 #define OP_LOG 6 +#define OP_RADIO 7 static const struct pvr2_i2c_op * const ops[] = { [OP_STANDARD] = &pvr2_i2c_op_v4l2_standard, @@ -48,6 +49,7 @@ static const struct pvr2_i2c_op * const ops[] = { [OP_FREQ] = &pvr2_i2c_op_v4l2_frequency, [OP_SIZE] = &pvr2_i2c_op_v4l2_size, [OP_LOG] = &pvr2_i2c_op_v4l2_log, + [OP_RADIO] = &pvr2_i2c_op_v4l2_radio, }; void pvr2_i2c_probe(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp) @@ -59,7 +61,8 @@ void pvr2_i2c_probe(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp) (1 << OP_VOLUME) | (1 << OP_FREQ) | (1 << OP_SIZE) | - (1 << OP_LOG)); + (1 << OP_LOG) | + (1 << OP_RADIO)); if (id == I2C_DRIVERID_MSP3400) { if (pvr2_i2c_msp3400_setup(hdw,cp)) { |