[media] bttv: there may be multiple tvaudio/tda7432 devices

Probe for additional tvaudio devices, and allow tvaudio+tda7432 to
co-exist. My STB TV PCI FM bttv card has a tda7432, a tda9850 and a
tea6420 and with this patch it finally works again (probably for the
first time in many years).

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 10 insertions, 4 deletions

diff --git a/drivers/media/pci/bt8xx/bttv-cards.c b/drivers/media/pci/bt8xx/bttv-cards.c
index 682ed893d718..fa0faaa2a49a 100644
--- a/drivers/media/pci/bt8xx/bttv-cards.c
+++ b/drivers/media/pci/bt8xx/bttv-cards.c
@@ -3547,6 +3547,16 @@ void bttv_init_card2(struct bttv *btv)
         if (btv->sd_msp34xx)
                 return;
 
+        /* Now see if we can find one of the tvaudio devices. */
+        btv->sd_tvaudio = v4l2_i2c_new_subdev(&btv->c.v4l2_dev,
+                &btv->c.i2c_adap, "tvaudio", 0, tvaudio_addrs());
+        if (btv->sd_tvaudio) {
+                /* There may be two tvaudio chips on the card, so try to
+                   find another. */
+                v4l2_i2c_new_subdev(&btv->c.v4l2_dev,
+                        &btv->c.i2c_adap, "tvaudio", 0, tvaudio_addrs());
+        }
+
         /* it might also be a tda7432. */
         if (!bttv_tvcards[btv->c.type].no_tda7432) {
                 static const unsigned short addrs[] = {
@@ -3559,10 +3569,6 @@ void bttv_init_card2(struct bttv *btv)
                 if (btv->sd_tda7432)
                         return;
         }
-
-        /* Now see if we can find one of the tvaudio devices. */
-        btv->sd_tvaudio = v4l2_i2c_new_subdev(&btv->c.v4l2_dev,
-                &btv->c.i2c_adap, "tvaudio", 0, tvaudio_addrs());
         if (btv->sd_tvaudio)
                 return;