V4L/DVB (10435): cx18: Normalize APU after second APU firmware load

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

drivers/media/video/cx18/cx18-driver.c

@@ -1080,6 +1080,19 @@ int cx18_init_on_first_open(struct cx18 *cx)
 		return -ENXIO;
 	}
 
+	/*
+	 * The second firmware load requires us to normalize the APU state,
+	 * or the audio for the first analog capture will be badly incorrect.
+	 *
+	 * I can't seem to call APU_RESETAI and have it succeed without the
+	 * APU capturing audio, so we start and stop it here to do the reset
+	 */
+
+	/* MPEG Encoding, 224 kbps, MPEG Layer II, 48 ksps */
+	cx18_vapi(cx, CX18_APU_START, 2, CX18_APU_ENCODING_METHOD_MPEG|0xb9, 0);
+	cx18_vapi(cx, CX18_APU_RESETAI, 0);
+	cx18_vapi(cx, CX18_APU_STOP, 1, CX18_APU_ENCODING_METHOD_MPEG);
+
 	vf.tuner = 0;
 	vf.type = V4L2_TUNER_ANALOG_TV;
 	vf.frequency = 6400; /* the tuner 'baseline' frequency */