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| author | Trent Piepho <xyzzy@speakeasy.org> | 2007-07-18 01:29:45 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-07-30 23:26:26 +0400 |
| commit | 9896bbc1972e3a0595f06c23692a20150a789308 (patch) | |
| tree | 1dc4b82182251bc747c8f40b3a791607124c39dd /drivers/media/video/zoran_device.c | |
| parent | 603d6f2c8f9f3604f9c6c1f8903efc2df30a000f (diff) | |
| download | linux-9896bbc1972e3a0595f06c23692a20150a789308.tar.xz | |
V4L/DVB (5891): zr36067: Turn off raw capture properly
When raw capture was turned off, the current capturing frame (v4l_grab_frame)
wasn't reset to NO_GRAB_ACTIVE. If capture was turned back on, the driver
would think this frame was currently being captured, and wait for it to
complete before starting a new frame. The hardware on the other hand would
not be actively capturing a frame. The result was the driver would wait
forever for v4l_grab_frame to be captured.
Some calls to zr36057_set_memgrab(0) were missing spin-locks, which have been
added.
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Acked-by: Ronald S. Bultje <rbultje@ronald.bitfreak.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/zoran_device.c')
| -rw-r--r-- | drivers/media/video/zoran_device.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/media/video/zoran_device.c b/drivers/media/video/zoran_device.c index d9640ec4b9b0..ba2f4ed29483 100644 --- a/drivers/media/video/zoran_device.c +++ b/drivers/media/video/zoran_device.c @@ -620,11 +620,17 @@ zr36057_set_memgrab (struct zoran *zr, int mode) { if (mode) { - if (btread(ZR36057_VSSFGR) & - (ZR36057_VSSFGR_SnapShot | ZR36057_VSSFGR_FrameGrab)) + /* We only check SnapShot and not FrameGrab here. SnapShot==1 + * means a capture is already in progress, but FrameGrab==1 + * doesn't necessary mean that. It's more correct to say a 1 + * to 0 transition indicates a capture completed. If a + * capture is pending when capturing is tuned off, FrameGrab + * will be stuck at 1 until capturing is turned back on. + */ + if (btread(ZR36057_VSSFGR) & ZR36057_VSSFGR_SnapShot) dprintk(1, KERN_WARNING - "%s: zr36057_set_memgrab(1) with SnapShot or FrameGrab on!?\n", + "%s: zr36057_set_memgrab(1) with SnapShot on!?\n", ZR_DEVNAME(zr)); /* switch on VSync interrupts */ @@ -641,11 +647,12 @@ zr36057_set_memgrab (struct zoran *zr, zr->v4l_memgrab_active = 1; } else { - zr->v4l_memgrab_active = 0; - /* switch off VSync interrupts */ btand(~zr->card.vsync_int, ZR36057_ICR); // SW + zr->v4l_memgrab_active = 0; + zr->v4l_grab_frame = NO_GRAB_ACTIVE; + /* reenable grabbing to screen if it was running */ if (zr->v4l_overlay_active) { zr36057_overlay(zr, 1); |