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V4L/DVB (6833): Don't limit cx88 audio routing to blackbird boards 

All cx2388 boards need the line-in audio to be routed from an external ADC
(refered to as "ADC mode" in the spec sheet), since the chip is uncapable
of dealing with baseband audio directly.
So... this patch enables normal mode when using the tuner (TV or Radio), and
enables ADC mode with any other source. It'll probably only work with boards
that have supported ADCs (such as the Wolfson wm9775)

Signed-off-by: Ricardo Cerqueira <v4l@cerqueira.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Ricardo Cerqueira 2007-10-16 20:52:08 -03:00 committed by Mauro Carvalho Chehab
parent 6a0bc9a016
commit 66e6fbdf99
1 changed files with 30 additions and 14 deletions
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26
drivers/media/video/cx88/cx88-video.c
View File

@ -392,9 +392,26 @@ int cx88_video_mux(struct cx88_core *core, unsigned int input)
break;
}
if (core->board.mpeg & CX88_MPEG_BLACKBIRD) {
/* sets sound input from external adc */
/* if there are audioroutes defined, we have an external
ADC to deal with audio */
if (INPUT(input).audioroute) {
/* cx2388's C-ADC is connected to the tuner only.
When used with S-Video, that ADC is busy dealing with
chroma, so an external must be used for baseband audio */
if (INPUT(input).type != CX88_VMUX_TELEVISION &&
INPUT(input).type != CX88_RADIO) {
/* "ADC mode" */
cx_write(AUD_I2SCNTL, 0x1);
cx_set(AUD_CTL, EN_I2SIN_ENABLE);
} else {
/* Normal mode */
cx_write(AUD_I2SCNTL, 0x0);
cx_clear(AUD_CTL, EN_I2SIN_ENABLE);
}
/* The wm8775 module has the "2" route hardwired into
the initialization. Some boards may use different
routes for different inputs. HVR-1300 surely does */
@ -405,12 +422,11 @@ int cx88_video_mux(struct cx88_core *core, unsigned int input)
route.input = INPUT(input).audioroute;
cx88_call_i2c_clients(core,
VIDIOC_INT_S_AUDIO_ROUTING,&route);
}
cx_set(AUD_CTL, EN_I2SIN_ENABLE);
} else
cx_clear(AUD_CTL, EN_I2SIN_ENABLE);
}
return 0;
}
EXPORT_SYMBOL(cx88_video_mux);