[media] Add proper audio support for Nova-S Plus with wm8775 ADC

This patch adds audio DMA capture and ALSA mixer elements for the line
input jack of the Hauppauge Nova-S-plus DVB-S PCI card.  The Nova-S-plus
has a WM8775 ADC that is currently not detected.  This patch enables
this chip and exports volume, balance mute and ALC elements for ALSA
mixer controls.

[mchehab@redhat.com: Changed the patch to only talk with wm8775 if board
info says so. Also, added platform_data support, to avoid changing the
behaviour for other boards, and fixed CodingStyle]

[awalls@md.metrocast.net: Changed patch to make the WM8775_GID defintion
bridge driver private and let the bridge driver set the value of
v4l2_subdev.grp_id.]

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Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Andy Walls <awalls@md.metrocast.net>

1 files changed, 11 insertions, 2 deletions

diff --git a/drivers/media/video/cx88/cx88.h b/drivers/media/video/cx88/cx88.h
index c9981e77416..aaf7d12b77d 100644
--- a/drivers/media/video/cx88/cx88.h
+++ b/drivers/media/video/cx88/cx88.h
@@ -33,6 +33,7 @@
 #include <media/cx2341x.h>
 #include <media/videobuf-dvb.h>
 #include <media/ir-kbd-i2c.h>
+#include <media/wm8775.h>
 
 #include "btcx-risc.h"
 #include "cx88-reg.h"
@@ -273,6 +274,9 @@ struct cx88_board {
 	enum cx88_board_type    mpeg;
 	unsigned int            audio_chip;
 	int			num_frontends;
+
+	/* Used for I2S devices */
+	int			i2sinputcntl;
 };
 
 struct cx88_subid {
@@ -379,6 +383,7 @@ struct cx88_core {
 
 	/* I2C remote data */
 	struct IR_i2c_init_data    init_data;
+	struct wm8775_platform_data wm8775_data;
 
 	struct mutex               lock;
 	/* various v4l controls */
@@ -398,17 +403,21 @@ static inline struct cx88_core *to_core(struct v4l2_device *v4l2_dev)
 	return container_of(v4l2_dev, struct cx88_core, v4l2_dev);
 }
 
-#define call_all(core, o, f, args...) 				\
+#define WM8775_GID	(1 << 0)
+
+#define call_hw(core, grpid, o, f, args...) \
 	do {							\
 		if (!core->i2c_rc) {				\
 			if (core->gate_ctrl)			\
 				core->gate_ctrl(core, 1);	\
-			v4l2_device_call_all(&core->v4l2_dev, 0, o, f, ##args); \
+			v4l2_device_call_all(&core->v4l2_dev, grpid, o, f, ##args); \
 			if (core->gate_ctrl)			\
 				core->gate_ctrl(core, 0);	\
 		}						\
 	} while (0)
 
+#define call_all(core, o, f, args...) call_hw(core, 0, o, f, ##args)
+
 struct cx8800_dev;
 struct cx8802_dev;