[media] au8522: Handle differences in comb filter config for s-video input

Tweak the comb filter config when in s-video mode to match the Hauppauge
Windows driver values (based on register dumps).

This work was sponsored by GetWellNetwork Inc.
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/au8522_decoder.c

@@ -278,10 +278,18 @@ static void setup_decoder_defaults(struct au8522_state *state, u8 input_mode)
 			AU8522_TVDEC_COMB_HDIF_THR2_REG06AH_CVBS);
 	au8522_writereg(state, AU8522_TVDEC_COMB_HDIF_THR3_REG06BH,
 			AU8522_TVDEC_COMB_HDIF_THR3_REG06BH_CVBS);
+	if (input_mode == AU8522_INPUT_CONTROL_REG081H_SVIDEO_CH13 ||
+	    input_mode == AU8522_INPUT_CONTROL_REG081H_SVIDEO_CH24) {
+		au8522_writereg(state, AU8522_TVDEC_COMB_DCDIF_THR1_REG06CH,
+				AU8522_TVDEC_COMB_DCDIF_THR1_REG06CH_SVIDEO);
+		au8522_writereg(state, AU8522_TVDEC_COMB_DCDIF_THR2_REG06DH,
+				AU8522_TVDEC_COMB_DCDIF_THR2_REG06DH_SVIDEO);
+	} else {
 		au8522_writereg(state, AU8522_TVDEC_COMB_DCDIF_THR1_REG06CH,
 				AU8522_TVDEC_COMB_DCDIF_THR1_REG06CH_CVBS);
 		au8522_writereg(state, AU8522_TVDEC_COMB_DCDIF_THR2_REG06DH,
 				AU8522_TVDEC_COMB_DCDIF_THR2_REG06DH_CVBS);
+	}
 	au8522_writereg(state, AU8522_TVDEC_COMB_DCDIF_THR3_REG06EH,
 			AU8522_TVDEC_COMB_DCDIF_THR3_REG06EH_CVBS);
 	au8522_writereg(state, AU8522_TVDEC_UV_SEP_THR_REG06FH,

drivers/media/dvb/frontends/au8522_priv.h

@@ -397,7 +397,9 @@ void au8522_release_state(struct au8522_state *state);
 #define AU8522_TVDEC_COMB_HDIF_THR2_REG06AH_CVBS		0x0A
 #define AU8522_TVDEC_COMB_HDIF_THR3_REG06BH_CVBS		0x32
 #define AU8522_TVDEC_COMB_DCDIF_THR1_REG06CH_CVBS		0x34
+#define AU8522_TVDEC_COMB_DCDIF_THR1_REG06CH_SVIDEO		0x2a
 #define AU8522_TVDEC_COMB_DCDIF_THR2_REG06DH_CVBS		0x05
+#define AU8522_TVDEC_COMB_DCDIF_THR2_REG06DH_SVIDEO		0x15
 #define AU8522_TVDEC_COMB_DCDIF_THR3_REG06EH_CVBS		0x6E
 #define AU8522_TVDEC_UV_SEP_THR_REG06FH_CVBS			0x0F
 #define AU8522_TVDEC_COMB_DC_THR1_NTSC_REG070H_CVBS		0x80