From 929a3ad1525895c394cbe97a6b74792da9a865a6 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Sat, 16 May 2009 21:06:57 -0300 Subject: [PATCH] V4L/DVB (11864): cx18: Complete support for Sliced and Raw VBI for 625 line systems Finish changes for sliced and raw VBI for 625 line systems. Tested with VPS and WSS being emitted by a PVR-350 in field 1 lines 16 and 23. Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-av-core.c | 27 +++++++++++++++++-------- drivers/media/video/cx18/cx18-av-vbi.c | 2 +- drivers/media/video/cx18/cx18-streams.c | 9 ++++----- 3 files changed, 24 insertions(+), 14 deletions(-) diff --git a/drivers/media/video/cx18/cx18-av-core.c b/drivers/media/video/cx18/cx18-av-core.c index d98010e0da9..33ec269a0f5 100644 --- a/drivers/media/video/cx18/cx18-av-core.c +++ b/drivers/media/video/cx18/cx18-av-core.c @@ -299,13 +299,13 @@ void cx18_av_std_setup(struct cx18 *cx) if (std & V4L2_STD_625_50) { /* * The following relationships of half line counts should hold: - * 625 = vblank656 + vactive + postvactive + * 625 = vblank656 + vactive * 10 = vblank656 - vblank = vsync pulses + equalization pulses * * vblank656: half lines after line 625/mid-313 of blanked video * vblank: half lines, after line 5/317, of blanked video - * vactive: half lines of active video - * postvactive: 5 half lines after the end of active video + * vactive: half lines of active video + + * 5 half lines after the end of active video * * As far as I can tell: * vblank656 starts counting from the falling edge of the first @@ -316,10 +316,21 @@ void cx18_av_std_setup(struct cx18 *cx) * For 625 line systems the driver will extract VBI information * from lines 6-23 and lines 318-335 (but the slicer can only * handle 17 lines, not the 18 in the vblank region). + * In addition, we need vblank656 and vblank to be one whole + * line longer, to cover line 24 and 336, so the SAV/EAV RP + * codes get generated such that the encoder can actually + * extract line 23 & 335 (WSS). We'll lose 1 line in each field + * at the top of the screen. + * + * It appears the 5 half lines that happen after active + * video must be included in vactive (579 instead of 574), + * otherwise the colors get badly displayed in various regions + * of the screen. I guess the chroma comb filter gets confused + * without them (at least when a PVR-350 is the PAL source). */ - vblank656 = 46; /* lines 1 - 23 & 313 - 335 */ - vblank = 36; /* lines 6 - 23 & 318 - 335 */ - vactive = 574; /* lines 24 - 310 & 336 - 622 */ + vblank656 = 48; /* lines 1 - 24 & 313 - 336 */ + vblank = 38; /* lines 6 - 24 & 318 - 336 */ + vactive = 579; /* lines 24 - 313 & 337 - 626 */ /* * For a 13.5 Mpps clock and 15,625 Hz line rate, a line is @@ -989,9 +1000,9 @@ static int cx18_av_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt) * cx18_av_std_setup(), above standard values: * * 480 + 1 for 60 Hz systems - * 576 - 2 for 50 Hz systems + * 576 + 3 for 50 Hz systems */ - Vlines = pix->height + (is_50Hz ? -2 : 1); + Vlines = pix->height + (is_50Hz ? 3 : 1); /* * Invalid height and width scaling requests are: diff --git a/drivers/media/video/cx18/cx18-av-vbi.c b/drivers/media/video/cx18/cx18-av-vbi.c index 640121448eb..a51732bcca4 100644 --- a/drivers/media/video/cx18/cx18-av-vbi.c +++ b/drivers/media/video/cx18/cx18-av-vbi.c @@ -256,7 +256,7 @@ int cx18_av_vbi_s_fmt(struct cx18 *cx, struct v4l2_format *fmt) cx18_av_write(cx, 0x43c, 0x16); /* Should match vblank set in cx18_av_std_setup() */ - cx18_av_write(cx, 0x474, is_pal ? 36 : 26); + cx18_av_write(cx, 0x474, is_pal ? 38 : 26); return 0; } diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c index a0800393316..54d248e16d8 100644 --- a/drivers/media/video/cx18/cx18-streams.c +++ b/drivers/media/video/cx18/cx18-streams.c @@ -374,12 +374,11 @@ static void cx18_vbi_setup(struct cx18_stream *s) * For 625/50 systems, according to the VIP 2 & BT.656 std: * The EAV RP code's Field bit toggles on line 1, a few lines * after the Vertcal Blank bit has already toggled. - * Tell the encoder to capture 23-1+1=23 lines per field, - * since we want lines 6 through 23. - * - * FIXME - revisit for 625/50 systems + * (We've actually set the digitizer so that the Field bit + * toggles on line 2.) Tell the encoder to capture 23-2+1=22 + * lines per field, since we want lines 6 through 23. */ - lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 1 + 1) * 2; + lines = cx->is_60hz ? (21 - 4 + 1) * 2 : (23 - 2 + 1) * 2; } data[0] = s->handle; -- 2.39.3