From 3ccc646b56a3f03029a259c6a8affd9cecc6020e Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Thu, 24 Dec 2009 13:06:08 -0300 Subject: V4L/DVB: cx25840, v4l2-subdev, ivtv, pvrusb2: Fix ivtv/cx25840 tinny audio This change attempts to fix the ivtv tinny audio problem by keeping digitizer to encoder audio clocks running, while disabling the video clocks as needed to avoid unpredictable PCI bus hangs. To accomplish this, for the cx25840 module enabling of audio streaming had to be separated from enabling video streaming, requiring an additional v4l2_subdev_audio_op and calls to this new op in the pvrusb2 and ivtv drivers. The cx231xx and cx23885 driver use the cx25840 module for affecting only video on s_stream calls, so those drivers needed no change. The CX23418 hardware does not exhibit either the tinny audio problem nor the PCI bus hang, so the cx18 driver did not need corresponding changes. CX2341[56] based cards that are not using the CX2584x family of chips do not seem to be affected by the tinny audio problem, and this change should not affect how they are configured. It will delay their first capture by starting by another 300 msec though. Many thanks go to Argus and Martin Dauskardt whose persistent testing and investigation of this problem will hopefully fix this problem once and for all for many ivtv users. Reported-by: Martin Dauskardt Reported-by: Argus Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx25840/cx25840-core.c | 48 ++++++++++++++++++++++++------ 1 file changed, 39 insertions(+), 9 deletions(-) (limited to 'drivers/media/video/cx25840') diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c index 385ecd58f1c..796f12d59da 100644 --- a/drivers/media/video/cx25840/cx25840-core.c +++ b/drivers/media/video/cx25840/cx25840-core.c @@ -1347,30 +1347,59 @@ static int cx25840_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register * } #endif +static int cx25840_s_audio_stream(struct v4l2_subdev *sd, int enable) +{ + struct cx25840_state *state = to_state(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + u8 v; + + if (is_cx2583x(state) || is_cx2388x(state) || is_cx231xx(state)) + return 0; + + v4l_dbg(1, cx25840_debug, client, "%s audio output\n", + enable ? "enable" : "disable"); + + if (enable) { + v = cx25840_read(client, 0x115) | 0x80; + cx25840_write(client, 0x115, v); + v = cx25840_read(client, 0x116) | 0x03; + cx25840_write(client, 0x116, v); + } else { + v = cx25840_read(client, 0x115) & ~(0x80); + cx25840_write(client, 0x115, v); + v = cx25840_read(client, 0x116) & ~(0x03); + cx25840_write(client, 0x116, v); + } + return 0; +} + static int cx25840_s_stream(struct v4l2_subdev *sd, int enable) { struct cx25840_state *state = to_state(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); + u8 v; - v4l_dbg(1, cx25840_debug, client, "%s output\n", + v4l_dbg(1, cx25840_debug, client, "%s video output\n", enable ? "enable" : "disable"); if (enable) { if (is_cx2388x(state) || is_cx231xx(state)) { - u8 v = (cx25840_read(client, 0x421) | 0x0b); + v = cx25840_read(client, 0x421) | 0x0b; cx25840_write(client, 0x421, v); } else { - cx25840_write(client, 0x115, - is_cx2583x(state) ? 0x0c : 0x8c); - cx25840_write(client, 0x116, - is_cx2583x(state) ? 0x04 : 0x07); + v = cx25840_read(client, 0x115) | 0x0c; + cx25840_write(client, 0x115, v); + v = cx25840_read(client, 0x116) | 0x04; + cx25840_write(client, 0x116, v); } } else { if (is_cx2388x(state) || is_cx231xx(state)) { - u8 v = cx25840_read(client, 0x421) & ~(0x0b); + v = cx25840_read(client, 0x421) & ~(0x0b); cx25840_write(client, 0x421, v); } else { - cx25840_write(client, 0x115, 0x00); - cx25840_write(client, 0x116, 0x00); + v = cx25840_read(client, 0x115) & ~(0x0c); + cx25840_write(client, 0x115, v); + v = cx25840_read(client, 0x116) & ~(0x04); + cx25840_write(client, 0x116, v); } } return 0; @@ -1601,6 +1630,7 @@ static const struct v4l2_subdev_tuner_ops cx25840_tuner_ops = { static const struct v4l2_subdev_audio_ops cx25840_audio_ops = { .s_clock_freq = cx25840_s_clock_freq, .s_routing = cx25840_s_audio_routing, + .s_stream = cx25840_s_audio_stream, }; static const struct v4l2_subdev_video_ops cx25840_video_ops = { -- cgit v1.2.2