The following patch adds a new control that makes it possible to set the
luma notch filter type to finetune picture quality.
Signed-off-by: Istvan Varga <istvan_v@xxxxxxxxxx>
diff -uNr xc4000_orig/drivers/media/video/cx88/cx88-core.c xc4000/drivers/media/video/cx88/cx88-core.c
--- xc4000_orig/drivers/media/video/cx88/cx88-core.c 2011-07-11 15:34:50.000000000 +0200
+++ xc4000/drivers/media/video/cx88/cx88-core.c 2011-07-11 15:44:35.000000000 +0200
@@ -636,6 +636,9 @@
cx_write(MO_PCI_INTSTAT, 0xFFFFFFFF); // Clear PCI int
cx_write(MO_INT1_STAT, 0xFFFFFFFF); // Clear RISC int
+ /* set default notch filter */
+ cx_andor(MO_HTOTAL, 0x1800, (HLNotchFilter4xFsc << 11));
+
/* Reset on-board parts */
cx_write(MO_SRST_IO, 0);
msleep(10);
@@ -994,10 +997,10 @@
// htotal
tmp64 = norm_htotal(norm) * (u64)vdec_clock;
do_div(tmp64, fsc8);
- htotal = (u32)tmp64 | (HLNotchFilter4xFsc << 11);
+ htotal = (u32)tmp64;
dprintk(1,"set_tvnorm: MO_HTOTAL 0x%08x [old=0x%08x,htotal=%d]\n",
htotal, cx_read(MO_HTOTAL), (u32)tmp64);
- cx_write(MO_HTOTAL, htotal);
+ cx_andor(MO_HTOTAL, 0x07ff, htotal);
// vbi stuff, set vbi offset to 10 (for 20 Clk*2 pixels), this makes
// the effective vbi offset ~244 samples, the same as the Bt8x8
diff -uNr xc4000_orig/drivers/media/video/cx88/cx88-video.c xc4000/drivers/media/video/cx88/cx88-video.c
--- xc4000_orig/drivers/media/video/cx88/cx88-video.c 2011-07-11 15:34:50.000000000 +0200
+++ xc4000/drivers/media/video/cx88/cx88-video.c 2011-07-11 15:49:29.000000000 +0200
@@ -262,6 +262,20 @@
.mask = 1 << 9,
.shift = 9,
}, {
+ .v = {
+ .id = V4L2_CID_BAND_STOP_FILTER,
+ .name = "Notch filter",
+ .minimum = 0,
+ .maximum = 3,
+ .step = 1,
+ .default_value = 0x0,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ },
+ .off = 0,
+ .reg = MO_HTOTAL,
+ .mask = 3 << 11,
+ .shift = 11,
+ }, {
/* --- audio --- */
.v = {
.id = V4L2_CID_AUDIO_MUTE,
@@ -320,6 +334,7 @@
V4L2_CID_SHARPNESS,
V4L2_CID_CHROMA_AGC,
V4L2_CID_COLOR_KILLER,
+ V4L2_CID_BAND_STOP_FILTER,
0
};
EXPORT_SYMBOL(cx88_user_ctrls);
--
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