[media] cx25840 / cx23885: Fixing audio/volume regression

Since the conversion to subdev in Oct 2010 the audio controls have
not functioned correctly in the cx23885 driver. Passing values of
0-3f did not translate into meaningfull register writes. I've
converted the cx23885 driver to match the cx25840 volume control
definition and now audio is working reliably again.

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx23885/cx23885-video.c

@@ -253,9 +253,9 @@ static struct cx23885_ctrl cx23885_ctls[] = {
 			.id            = V4L2_CID_AUDIO_VOLUME,
 			.name          = "Volume",
 			.minimum       = 0,
-			.maximum       = 0x3f,
-			.step          = 1,
-			.default_value = 0x3f,
+			.maximum       = 65535,
+			.step          = 65535 / 100,
+			.default_value = 65535,
 			.type          = V4L2_CTRL_TYPE_INTEGER,
 		},
 		.reg                   = PATH1_VOL_CTL,

drivers/media/video/cx25840/cx25840-audio.c

@@ -480,7 +480,6 @@ void cx25840_audio_set_path(struct i2c_client *client)
 
 static void set_volume(struct i2c_client *client, int volume)
 {
-	struct cx25840_state *state = to_state(i2c_get_clientdata(client));
 	int vol;
 
 	/* Convert the volume to msp3400 values (0-127) */
@@ -496,14 +495,7 @@ static void set_volume(struct i2c_client *client, int volume)
 	}
 
 	/* PATH1_VOLUME */
-	if (is_cx2388x(state)) {
-		/* for cx23885 volume doesn't work,
-		 * the calculation always results in
-		 * e4 regardless.
-		 */
-		cx25840_write(client, 0x8d4, volume);
-	} else
-		cx25840_write(client, 0x8d4, 228 - (vol * 2));
+	cx25840_write(client, 0x8d4, 228 - (vol * 2));
 }
 
 static void set_balance(struct i2c_client *client, int balance)