V4L/DVB (10278): cx18: Fix bad audio in first analog capture.

Normalize the APU state before the second firmware load so that audio
for the first analog capture is correct.

Many thanks to Conexant for supporting me in finding a solution for this
problem.

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

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/media/video/cx18/cx23418.h b/drivers/media/video/cx18/cx23418.h
index 601f3a2ab742..9956abf576c5 100644
--- a/drivers/media/video/cx18/cx23418.h
+++ b/drivers/media/video/cx18/cx23418.h
@@ -56,6 +56,22 @@
 #define APU_CMD_MASK                            0x10000000
 #define APU_CMD_MASK_ACK                        (APU_CMD_MASK | 0x80000000)
 
+#define CX18_APU_ENCODING_METHOD_MPEG           (0 << 28)
+#define CX18_APU_ENCODING_METHOD_AC3            (1 << 28)
+
+/* Description: Command APU to start audio
+   IN[0] - audio parameters (same as CX18_CPU_SET_AUDIO_PARAMETERS?)
+   IN[1] - caller buffer address, or 0
+   ReturnCode - ??? */
+#define CX18_APU_START                          (APU_CMD_MASK | 0x01)
+
+/* Description: Command APU to stop audio
+   IN[0] - encoding method to stop
+   ReturnCode - ??? */
+#define CX18_APU_STOP                           (APU_CMD_MASK | 0x02)
+
+/* Description: Command APU to reset the AI
+   ReturnCode - ??? */
 #define CX18_APU_RESETAI                        (APU_CMD_MASK | 0x05)
 
 /* Description: This command indicates that a Memory Descriptor List has been