V4L/DVB (3514): SAA7113 doesn't have auto std chroma detection mode

This patch makes chroma standard selection based at possible values,
according with datasheet.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/media/video/saa7115.c b/drivers/media/video/saa7115.c
index 7050d81c0242..498d9aaec1e5 100644
--- a/drivers/media/video/saa7115.c
+++ b/drivers/media/video/saa7115.c
@@ -713,6 +713,35 @@ static void saa7115_set_v4lstd(struct i2c_client *client, v4l2_std_id std)
                 saa7115_writeregs(client, saa7115_cfg_50hz_video);
         }
 
+        /* Register 0E - Bits D6-D4 on NO-AUTO mode
+                (SAA7113 doesn't have auto mode)
+            50 Hz / 625 lines           60 Hz / 525 lines
+        000 PAL BGDHI (4.43Mhz)         NTSC M (3.58MHz)
+        001 NTSC 4.43 (50 Hz)           PAL 4.43 (60 Hz)
+        010 Combination-PAL N (3.58MHz) NTSC 4.43 (60 Hz)
+        011 NTSC N (3.58MHz)            PAL M (3.58MHz)
+        100 reserved                    NTSC-Japan (3.58MHz)
+        */
+        if (state->ident == V4L2_IDENT_SAA7113) {
+                u8 reg =  saa7115_read(client, 0x0e) & 0x8f;
+
+                if (std & V4L2_STD_PAL) {
+                        if (std == V4L2_STD_PAL_M) {
+                                reg|=0x30;
+                        } else if (std == V4L2_STD_PAL_N) {
+                                reg|=0x20;
+                        } else if (std == V4L2_STD_PAL_60) {
+                                reg|=0x10;
+                        }
+                } else if (std & V4L2_STD_NTSC) {
+                        if (std == V4L2_STD_NTSC_M_JP) {
+                                reg|=0x40;
+                        }
+                }
+                saa7115_write(client, 0x0e, reg);
+        }
+
+
         state->std = std;
 
         /* restart task B if needed */