When using multiple capture cards, it migth be necessary to identify a specific device with an ALSA one. If not, the order of the ALSA devices might have no relation to the id of the radio or video device.
Signed-off-by: Nicolas Sugino <nsugino@xxxxxxxxxxx>
---
Changelog:
v2:
Shortened line size
Fixed logging
---
drivers/media/pci/ivtv/ivtv-alsa-main.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/media/pci/ivtv/ivtv-alsa-main.c b/drivers/media/pci/ivtv/ivtv-alsa-main.c
index 41fa215..8a86b61 100644
--- a/drivers/media/pci/ivtv/ivtv-alsa-main.c
+++ b/drivers/media/pci/ivtv/ivtv-alsa-main.c
@@ -41,6 +41,7 @@
#include "ivtv-alsa-pcm.h"
int ivtv_alsa_debug;
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
#define IVTV_DEBUG_ALSA_INFO(fmt, arg...) \
do { \
@@ -54,6 +55,10 @@ MODULE_PARM_DESC(debug,
"\t\t\t 1/0x0001: warning\n"
"\t\t\t 2/0x0002: info\n");
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index,
+ "Index value for IVTV ALSA capture interface(s).\n");
+
MODULE_AUTHOR("Andy Walls");
MODULE_DESCRIPTION("CX23415/CX23416 ALSA Interface");
MODULE_SUPPORTED_DEVICE("CX23415/CX23416 MPEG2 encoder");
@@ -137,7 +142,7 @@ static int snd_ivtv_init(struct v4l2_device *v4l2_dev)
struct ivtv *itv = to_ivtv(v4l2_dev);
struct snd_card *sc = NULL;
struct snd_ivtv_card *itvsc;
- int ret;
+ int ret, idx;
/* Numbrs steps from "Writing an ALSA Driver" by Takashi Iwai */
@@ -145,8 +150,10 @@ static int snd_ivtv_init(struct v4l2_device *v4l2_dev)
/* This is a no-op for us. We'll use the itv->instance */
/* (2) Create a card instance */
+ /* use first available id if not specified otherwise*/
+ idx = index[itv->instance] == -1 ? SNDRV_DEFAULT_IDX1 : index[itv->instance];
ret = snd_card_new(&itv->pdev->dev,
- SNDRV_DEFAULT_IDX1, /* use first available id */
+ idx,
SNDRV_DEFAULT_STR1, /* xid from end of shortname*/
THIS_MODULE, 0, &sc);
if (ret) {
@@ -196,6 +203,9 @@ static int snd_ivtv_init(struct v4l2_device *v4l2_dev)
goto err_exit_free;
}
+ IVTV_ALSA_INFO("%s: Instance %d registered as ALSA card %d\n",
+ __func__, itv->instance, sc->number);
+
return 0;
err_exit_free:
--
2.1.4
--
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