V4L/DVB (6605): Add a modprobe option to manually select audio standard
While there's no public API to define audio standard, adds a hack option for
select them. This is needed only for NICAM and A2 firmwares, since AM, BTSC and
EAIJ are already properly handled, on firmware version 2.7.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/tuner-xc2028.c b/drivers/media/video/tuner-xc2028.c
index 492181d..371e822 100644
--- a/drivers/media/video/tuner-xc2028.c
+++ b/drivers/media/video/tuner-xc2028.c
@@ -28,6 +28,20 @@
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");
+static char audio_std[8];
+module_param_string(audio_std, audio_std, sizeof(audio_std), 0);
+MODULE_PARM_DESC(audio_std,
+ "Audio standard. XC3028 audio decoder explicitly "
+ "needs to know what audio\n"
+ "standard is needed for some video standards with audio A2 or NICAM.\n"
+ "The valid values are:\n"
+ "A2\n"
+ "A2/A\n"
+ "A2/B\n"
+ "NICAM\n"
+ "NICAM/A\n"
+ "NICAM/B\n");
+
static LIST_HEAD(xc2028_list);
/* struct for storing firmware table */
struct firmware_description {
@@ -180,6 +194,24 @@
printk("SCODE ");
}
+static v4l2_std_id parse_audio_std_option(void)
+{
+ if (strcasecmp(audio_std, "A2"))
+ return V4L2_STD_A2;
+ if (strcasecmp(audio_std, "A2/A"))
+ return V4L2_STD_A2_A;
+ if (strcasecmp(audio_std, "A2/B"))
+ return V4L2_STD_A2_B;
+ if (strcasecmp(audio_std, "NICAM"))
+ return V4L2_STD_NICAM;
+ if (strcasecmp(audio_std, "NICAM/A"))
+ return V4L2_STD_NICAM_A;
+ if (strcasecmp(audio_std, "NICAM/B"))
+ return V4L2_STD_NICAM_B;
+
+ return 0;
+}
+
static void free_firmware(struct xc2028_data *priv)
{
int i;
@@ -613,6 +645,9 @@
return 0;
}
+ /* Add audio hack to std mask */
+ std |= parse_audio_std_option();
+
rc = load_firmware(fe, type, &std);
if (rc < 0)
return rc;