V4L/DVB (3300): Add standard for South Korean NTSC-M using A2 audio.

South Korea uses NTSC-M but with A2 audio instead of BTSC. Several audio
chips need this information in order to set the correct audio processing
registers.

Acked-by: Mauro Carvalho Chehab <mauro_chehab@yahoo.com.br>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 20 insertions, 30 deletions

diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c
index 3acd587b160c..8d8aa8ec8304 100644
--- a/drivers/media/video/cx25840/cx25840-core.c
+++ b/drivers/media/video/cx25840/cx25840-core.c
@@ -220,33 +220,23 @@ static void input_change(struct i2c_client *client)
                 cx25840_write(client, 0x808, 0xff);
                 cx25840_write(client, 0x80b, 0x10);
         } else if (std & V4L2_STD_NTSC) {
-                /* NTSC */
-                if (state->pvr150_workaround) {
-                        /* Certain Hauppauge PVR150 models have a hardware bug
-                           that causes audio to drop out. For these models the
-                           audio standard must be set explicitly.
-                           To be precise: it affects cards with tuner models
-                           85, 99 and 112 (model numbers from tveeprom). */
-                        if (std == V4L2_STD_NTSC_M_JP) {
-                                /* Japan uses EIAJ audio standard */
-                                cx25840_write(client, 0x808, 0x2f);
-                        } else {
-                                /* Others use the BTSC audio standard */
-                                cx25840_write(client, 0x808, 0x1f);
-                        }
-                        /* South Korea uses the A2-M (aka Zweiton M) audio
-                           standard, and should set 0x808 to 0x3f, but I don't
-                           know how to detect this. */
-                } else if (std == V4L2_STD_NTSC_M_JP) {
+                /* Certain Hauppauge PVR150 models have a hardware bug
+                   that causes audio to drop out. For these models the
+                   audio standard must be set explicitly.
+                   To be precise: it affects cards with tuner models
+                   85, 99 and 112 (model numbers from tveeprom). */
+                int hw_fix = state->pvr150_workaround;
+
+                if (std == V4L2_STD_NTSC_M_JP) {
                         /* Japan uses EIAJ audio standard */
-                        cx25840_write(client, 0x808, 0xf7);
+                        cx25840_write(client, 0x808, hw_fix ? 0x2f : 0xf7);
+                } else if (std == V4L2_STD_NTSC_M_KR) {
+                        /* South Korea uses A2 audio standard */
+                        cx25840_write(client, 0x808, hw_fix ? 0x3f : 0xf8);
                 } else {
                         /* Others use the BTSC audio standard */
-                        cx25840_write(client, 0x808, 0xf6);
+                        cx25840_write(client, 0x808, hw_fix ? 0x1f : 0xf6);
                 }
-                /* South Korea uses the A2-M (aka Zweiton M) audio standard,
-                   and should set 0x808 to 0xf8, but I don't know how to
-                   detect this. */
                 cx25840_write(client, 0x80b, 0x00);
         }
 
@@ -330,17 +320,17 @@ static int set_v4lstd(struct i2c_client *client, v4l2_std_id std)
         u8 fmt=0;       /* zero is autodetect */
 
         /* First tests should be against specific std */
-        if (std & V4L2_STD_NTSC_M_JP) {
+        if (std == V4L2_STD_NTSC_M_JP) {
                 fmt=0x2;
-        } else if (std & V4L2_STD_NTSC_443) {
+        } else if (std == V4L2_STD_NTSC_443) {
                 fmt=0x3;
-        } else if (std & V4L2_STD_PAL_M) {
+        } else if (std == V4L2_STD_PAL_M) {
                 fmt=0x5;
-        } else if (std & V4L2_STD_PAL_N) {
+        } else if (std == V4L2_STD_PAL_N) {
                 fmt=0x6;
-        } else if (std & V4L2_STD_PAL_Nc) {
+        } else if (std == V4L2_STD_PAL_Nc) {
                 fmt=0x7;
-        } else if (std & V4L2_STD_PAL_60) {
+        } else if (std == V4L2_STD_PAL_60) {
                 fmt=0x8;
         } else {
                 /* Then, test against generic ones */
@@ -369,7 +359,7 @@ v4l2_std_id cx25840_get_v4lstd(struct i2c_client * client)
         }
 
         switch (fmt) {
-        case 0x1: return V4L2_STD_NTSC_M;
+        case 0x1: return V4L2_STD_NTSC_M | V4L2_STD_NTSC_M_KR;
         case 0x2: return V4L2_STD_NTSC_M_JP;
         case 0x3: return V4L2_STD_NTSC_443;
         case 0x4: return V4L2_STD_PAL;