diff options
| author | Mauro Carvalho Chehab | 2006-12-17 23:30:47 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab | 2006-12-27 14:19:26 -0200 |
| commit | 315eb962d2e9438bc10da2488b604f04a1c0006f (patch) | |
| tree | dc72d7f95e3b69cf5955fa3eeaeafcb0e4ae873d /drivers/media | |
| parent | ed00b41dc8bc286682d31ad64060ccc70513e90b (diff) | |
V4L/DVB (4980): Fixes bug 7267: PAL/60 is not working
On cx88 driver, sampling rate should be at chroma subcarrier freq (FSC).
However, driver were programming wrong values for PAL/60, PAL/Nc and
NTSC 4.43. This patch do the proper calculation. It also calculates
htotal, hdelay and hactive constants, according with the sampling
rate.
It is tested with PAL/60 by Piotr Maksymuk and Olivier. Also tested with
the already-supported standards.
Test is still required for PAL/Nc.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/cx88/cx88-core.c | 35 | ||||
| -rw-r--r-- | drivers/media/video/cx88/cx88.h | 2 |
2 files changed, 23 insertions, 14 deletions
diff --git a/drivers/media/video/cx88/cx88-core.c b/drivers/media/video/cx88/cx88-core.c index 453af5e943ff..18997361c75a 100644 --- a/drivers/media/video/cx88/cx88-core.c +++ b/drivers/media/video/cx88/cx88-core.c @@ -633,12 +633,12 @@ int cx88_reset(struct cx88_core *core) static unsigned int inline norm_swidth(struct cx88_tvnorm *norm) { - return (norm->id & V4L2_STD_625_50) ? 922 : 754; + return (norm->id & (V4L2_STD_MN & ~V4L2_STD_PAL_Nc)) ? 754 : 922; } static unsigned int inline norm_hdelay(struct cx88_tvnorm *norm) { - return (norm->id & V4L2_STD_625_50) ? 186 : 135; + return (norm->id & (V4L2_STD_MN & ~V4L2_STD_PAL_Nc)) ? 135 : 186; } static unsigned int inline norm_vdelay(struct cx88_tvnorm *norm) @@ -648,24 +648,33 @@ static unsigned int inline norm_vdelay(struct cx88_tvnorm *norm) static unsigned int inline norm_fsc8(struct cx88_tvnorm *norm) { - static const unsigned int ntsc = 28636360; - static const unsigned int pal = 35468950; - static const unsigned int palm = 28604892; - if (norm->id & V4L2_STD_PAL_M) - return palm; + return 28604892; // 3.575611 MHz + + if (norm->id & (V4L2_STD_PAL_Nc)) + return 28656448; // 3.582056 MHz + + if (norm->id & V4L2_STD_NTSC) // All NTSC/M and variants + return 28636360; // 3.57954545 MHz +/- 10 Hz - return (norm->id & V4L2_STD_625_50) ? pal : ntsc; + /* SECAM have also different sub carrier for chroma, + but step_db and step_dr, at cx88_set_tvnorm already handles that. + + The same FSC applies to PAL/BGDKIH, PAL/60, NTSC/4.43 and PAL/N + */ + + return 35468950; // 4.43361875 MHz +/- 5 Hz } static unsigned int inline norm_htotal(struct cx88_tvnorm *norm) { - /* Should always be Line Draw Time / (4*FSC) */ - if (norm->id & V4L2_STD_PAL_M) - return 909; + unsigned int fsc4=norm_fsc8(norm)/2; - return (norm->id & V4L2_STD_625_50) ? 1135 : 910; + /* returns 4*FSC / vtotal / frames per seconds */ + return (norm->id & V4L2_STD_625_50) ? + ((fsc4+312)/625+12)/25 : + ((fsc4+262)/525*1001+15000)/30000; } static unsigned int inline norm_vbipack(struct cx88_tvnorm *norm) @@ -692,7 +701,7 @@ int cx88_set_scale(struct cx88_core *core, unsigned int width, unsigned int heig value &= 0x3fe; cx_write(MO_HDELAY_EVEN, value); cx_write(MO_HDELAY_ODD, value); - dprintk(1,"set_scale: hdelay 0x%04x\n", value); + dprintk(1,"set_scale: hdelay 0x%04x (width %d)\n", value,swidth); value = (swidth * 4096 / width) - 4096; cx_write(MO_HSCALE_EVEN, value); diff --git a/drivers/media/video/cx88/cx88.h b/drivers/media/video/cx88/cx88.h index 7054e941f1d7..a9575ad8ca27 100644 --- a/drivers/media/video/cx88/cx88.h +++ b/drivers/media/video/cx88/cx88.h @@ -91,7 +91,7 @@ struct cx88_tvnorm { static unsigned int inline norm_maxw(struct cx88_tvnorm *norm) { - return (norm->id & V4L2_STD_625_50) ? 768 : 640; + return (norm->id & (V4L2_STD_MN & ~V4L2_STD_PAL_Nc)) ? 720 : 768; } |