On Sun, Mar 24, 2013 at 1:51 PM, Mauro Carvalho Chehab
<mchehab@xxxxxxxxxx> wrote:
> drivers/media/dvb-frontends/au8522_decoder.c:static int au8522_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
> drivers/media/dvb-frontends/au8522_decoder.c-{
> drivers/media/dvb-frontends/au8522_decoder.c- int val = 0;
> drivers/media/dvb-frontends/au8522_decoder.c- struct au8522_state *state = to_state(sd);
> drivers/media/dvb-frontends/au8522_decoder.c- u8 lock_status;
> drivers/media/dvb-frontends/au8522_decoder.c-
> drivers/media/dvb-frontends/au8522_decoder.c- /* Interrogate the decoder to see if we are getting a real signal */
> drivers/media/dvb-frontends/au8522_decoder.c- lock_status = au8522_readreg(state, 0x00);
> drivers/media/dvb-frontends/au8522_decoder.c- if (lock_status == 0xa2)
> drivers/media/dvb-frontends/au8522_decoder.c- vt->signal = 0xffff;
> drivers/media/dvb-frontends/au8522_decoder.c- else
> drivers/media/dvb-frontends/au8522_decoder.c- vt->signal = 0x00;
> drivers/media/dvb-frontends/au8522_decoder.c-
> drivers/media/dvb-frontends/au8522_decoder.c- vt->capability |=
> drivers/media/dvb-frontends/au8522_decoder.c- V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 |
> drivers/media/dvb-frontends/au8522_decoder.c- V4L2_TUNER_CAP_LANG2 | V4L2_TUNER_CAP_SAP;
> drivers/media/dvb-frontends/au8522_decoder.c-
> drivers/media/dvb-frontends/au8522_decoder.c- val = V4L2_TUNER_SUB_MONO;
> drivers/media/dvb-frontends/au8522_decoder.c- vt->rxsubchans = val;
> drivers/media/dvb-frontends/au8522_decoder.c- vt->audmode = V4L2_TUNER_MODE_STEREO;
> drivers/media/dvb-frontends/au8522_decoder.c- return 0;
>
> As if the i2c gate is on a wrong state, au8522_readreg() won't
> work anymore.
Note that au8522_g_tuner function never actually talks to the tuner.
It's handled entirely within the au8522 driver, which is not behind
the gate. The I2C gate is only required if talking to the xc5000, not
the au8522.
There's something else broken here. I suspect it's probably some
artifact of the conversion to the new control framework (if I had to
guess).
Devin
--
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com
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