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authorPantelis Koukousoulas <pakt223@freemail.gr>2006-12-28 03:05:19 +0100
committerMauro Carvalho Chehab <mchehab@infradead.org>2007-02-21 16:34:21 +0100
commit275b2e283b139bee19e7de5929d01484b8e3ee51 (patch)
treedbef39c440161762a14d119486dbc1fcd99c4455 /drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c
parentV4L/DVB (5074): Some fixes at stream waitqueue on vivi (diff)
downloadlinux-275b2e283b139bee19e7de5929d01484b8e3ee51.tar.xz
linux-275b2e283b139bee19e7de5929d01484b8e3ee51.zip
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-i2c-chips-v4l2.c')
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c b/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c
index 05121666b9ba..93b8d077c11e 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-i2c-chips-v4l2.c
@@ -39,6 +39,7 @@
#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,
@@ -47,6 +48,7 @@ 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)
@@ -58,7 +60,8 @@ 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)) {