kevin/linux
1
Fork 0
Code
3e0ac6717b
linux/drivers/media/video
History
Al Cooper 3e0ac6717b [media] media: Fix a UVC performance problem on systems with non-coherent DMA 
The UVC driver uses usb_alloc_coherent() to allocate DMA data buffers.
On systems without coherent DMA this ends up allocating buffers in
uncached memory. The subsequent memcpy's done to coalesce the DMA
chunks into contiguous buffers then run VERY slowly. On a MIPS test
system the memcpy is about 200 times slower. This issue prevents the
system from keeping up with 720p YUYV data at 10fps.

The following patch uses kmalloc to alloc the DMA buffers instead of
usb_alloc_coherent on systems without coherent DMA. With this patch
the system was easily able to keep up with 720p at 10fps.

Signed-off-by: Al Cooper <alcooperx@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-09-23 20:07:47 -03:00
..
au0828 [media] drivers/media: do not use EXTRA_CFLAGS 2011-09-03 18:50:59 -03:00
bt8xx [media] bt8xx: Use current logging styles 2011-09-03 21:02:52 -03:00
cpia2 [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
cx18 [media] cx18: Fix videobuf capture 2011-09-18 08:03:39 -03:00
cx88 [media] drivers/media: do not use EXTRA_CFLAGS 2011-09-03 18:50:59 -03:00
cx231xx [media] drivers/media: do not use EXTRA_CFLAGS 2011-09-03 18:50:59 -03:00
cx23885 [media] altera-stapl: it is time to move out from staging 2011-09-23 15:00:57 -03:00
cx25840 [media] drivers/media: do not use EXTRA_CFLAGS 2011-09-03 18:50:59 -03:00
davinci [media] davinci vpbe: Use resource_size() 2011-09-21 14:10:34 -03:00
em28xx [media] em28xx: Fix em28xx_devused cleanup logic on error 2011-09-21 16:45:54 -03:00
et61x251 [media] et61x251: Use current logging styles 2011-09-03 21:11:59 -03:00
gspca [media] gspca - sonixj: Fix the darkness of sensor om6802 in 320x240 2011-09-11 09:33:37 -03:00
hdpvr [media] drivers/media: do not use EXTRA_CFLAGS 2011-09-03 18:50:59 -03:00
ivtv [media] ivtv: fill in service_set 2011-09-06 14:51:27 -03:00
m5mols [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
marvell-ccic [media] mmp_camera: add MODULE_ALIAS 2011-09-18 08:05:43 -03:00
omap [media] V4l2: OMAP: VOUT: Minor Cleanup, removing the unnecessary code 2011-07-27 17:56:06 -03:00
omap3isp [media] omap3isp: video: Avoid crashes when pipeline set stream operation fails 2011-09-21 15:30:13 -03:00
pvrusb2 [media] drivers/media: do not use EXTRA_CFLAGS 2011-09-03 18:50:59 -03:00
pwc [media] pwc: add support for VIDIOC_LOG_STATUS 2011-09-21 10:51:20 -03:00
s5p-fimc [media] s5p-fimc: Remove single-planar capability flags 2011-09-06 17:51:18 -03:00
s5p-mfc [media] media: s5p-mfc: fix section mismatch 2011-09-21 14:53:37 -03:00
s5p-tv [media] media: vb2: change queue initialization order 2011-09-06 15:07:20 -03:00
saa7134 [media] drivers/media: do not use EXTRA_CFLAGS 2011-09-03 18:50:59 -03:00
saa7164 [media] saa7164: Adding support for HVR2200 card id 0x8953 2011-09-21 10:16:31 -03:00
sn9c102 [media] return -ENOTTY for unsupported ioctl's at legacy drivers 2011-07-27 17:53:38 -03:00
tlg2300 [media] drivers/media: do not use EXTRA_CFLAGS 2011-09-03 18:50:59 -03:00
tm6000 [media] move tm6000 to drivers/media/video 2011-09-23 09:32:35 -03:00
usbvision [media] drivers/media: do not use EXTRA_CFLAGS 2011-09-03 18:50:59 -03:00
uvc [media] media: Fix a UVC performance problem on systems with non-coherent DMA 2011-09-23 20:07:47 -03:00
zoran [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
adp1653.c [media] adp1653: set media entity type 2011-09-22 10:26:46 -03:00
adv7170.c
adv7175.c
adv7180.c
adv7343_regs.h
adv7343.c
ak881x.c
arv.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
atmel-isi.c [media] media: vb2: change queue initialization order 2011-09-06 15:07:20 -03:00
bt819.c [media] vpx3220, bt819: fix compiler warnings 2011-09-06 14:46:17 -03:00
bt856.c
bt866.c
btcx-risc.c
btcx-risc.h
bw-qcam.c [media] drivers/media/video: add missing kfree 2011-07-27 17:55:55 -03:00
c-qcam.c [media] drivers/media/video: add missing kfree 2011-07-27 17:55:55 -03:00
cs53l32a.c
cs5345.c
cs8420.h
cx2341x.c
fsl-viu.c [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
hexium_gemini.c [media] saa7146: Use current logging styles 2011-09-03 20:54:14 -03:00
hexium_orion.c [media] saa7146: Use current logging styles 2011-09-03 20:54:14 -03:00
ibmmpeg2.h
imx074.c [media] imx074: return a meaningful error code instead of -1 2011-04-13 09:54:35 -03:00
indycam.c
indycam.h
ir-kbd-i2c.c [media] ir-kbd-i2c: pass device code w/key in hauppauge case 2011-03-22 19:24:18 -03:00
Kconfig [media] move tm6000 to drivers/media/video 2011-09-23 09:32:35 -03:00
ks0127.c
ks0127.h
m52790.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
Makefile [media] move tm6000 to drivers/media/video 2011-09-23 09:32:35 -03:00
mem2mem_testdev.c [media] media: vb2: change plane sizes array to unsigned int[] 2011-09-06 15:04:27 -03:00
meye.c [media] v4l2-ioctl: add priority handling support 2011-03-22 16:37:59 -03:00
meye.h
msp3400-driver.c [media] msp3400: fill in v4l2_tuner based on vt->type field 2011-07-07 17:28:30 -03:00
msp3400-driver.h
msp3400-kthreads.c Fix common misspellings 2011-03-31 11:26:23 -03:00
mt9m001.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
mt9m111.c [media] mt9m111: move lastpage to struct mt9m111 for multi instances 2011-09-21 14:03:24 -03:00
mt9p031.c [media] mt9p031: Aptina (Micron) MT9P031 5MP sensor driver 2011-09-11 09:49:28 -03:00
mt9t001.c [media] mt9t001: Aptina (Micron) MT9T001 3MP sensor driver 2011-09-21 15:31:08 -03:00
mt9t031.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
mt9t112.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
mt9v011.c [media] mt9v011: Fixed gain calculation 2011-07-27 17:52:25 -03:00
mt9v022.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
mt9v032.c [media] v4l: mt9v032: Fix Bayer pattern 2011-07-27 17:56:10 -03:00
mx1_camera.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
mx2_camera.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
mx3_camera.c [media] media: vb2: dma contig allocator: use dma_addr instread of paddr 2011-09-06 15:05:10 -03:00
mxb.c [media] saa7146: Use current logging styles 2011-09-03 20:54:14 -03:00
mxb.h
noon010pc30.c [media] noon010pc30: Remove g_chip_ident operation handler 2011-09-21 14:31:34 -03:00
omap1_camera.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
omap24xxcam-dma.c
omap24xxcam.c Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2011-07-30 00:08:53 -07:00
omap24xxcam.h
ov772x.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
ov2640.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
ov5642.c [media] ov5642: include module.h for its facilities 2011-07-29 12:54:36 -03:00
ov6650.c Fix common misspellings 2011-03-31 11:26:23 -03:00
ov7670.c [media] marvell-cam: Move cafe-ccic into its own directory 2011-07-27 17:53:00 -03:00
ov9640.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
ov9640.h
ov9740.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
pms.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
pxa_camera.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
rj54n1cb0c.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
s2255drv.c [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
saa711x_regs.h
saa717x.c
saa6588.c
saa7110.c
saa7115.c [media] saa7115: use the new auto cluster support 2011-09-21 10:51:49 -03:00
saa7121.h
saa7127.c
saa7146.h
saa7146reg.h
saa7185.c
saa7191.c
saa7191.h
sh_mobile_ceu_camera.c [media] media: vb2: dma contig allocator: use dma_addr instread of paddr 2011-09-06 15:05:10 -03:00
sh_mobile_csi2.c [media] V4L: sh_mobile_csi2: switch away from using the soc-camera bus notifier 2011-07-27 17:56:08 -03:00
sh_vou.c [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
soc_camera_platform.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
soc_camera.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
soc_mediabus.c [media] V4L: soc-camera: add more format look-up entries 2011-05-20 12:05:27 -03:00
sr030pc30.c [media] sr030pc30: Remove empty s_stream op 2011-09-21 12:48:45 -03:00
stk-sensor.c
stk-webcam.c [media] drivers/media/video/stk-webcam.c: coding style issue 2011-09-18 08:13:10 -03:00
stk-webcam.h
tcm825x.c Fix common misspellings 2011-03-31 11:26:23 -03:00
tcm825x.h
tda7432.c [media] Correct and add some parameter descriptions 2011-07-27 17:52:59 -03:00
tda9840.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
tea6415c.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
tea6415c.h
tea6420.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
tea6420.h
ths7303.c
timblogiw.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
tlv320aic23b.c
tuner-core.c [media] xc4000: removed card_type 2011-07-27 17:52:40 -03:00
tvaudio.c [media] tvaudio: fix compiler warnings 2011-09-06 14:44:30 -03:00
tveeprom.c [media] tveeprom: update hauppauge tuner list thru 174 2011-05-20 09:27:15 -03:00
tvp514x_regs.h
tvp514x.c
tvp5150_reg.h
tvp5150.c
tvp7002_reg.h
tvp7002.c [media] TVP7002: Changed register values 2011-09-22 10:25:38 -03:00
tw9910.c [media] V4L: soc-camera: remove soc-camera bus and devices on it 2011-07-27 17:56:08 -03:00
upd64031a.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
upd64083.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
v4l2-common.c [media] v4l2-ctrls: add new bitmask control type 2011-07-27 17:55:38 -03:00
v4l2-compat-ioctl32.c [media] v4l2-compat-ioctl32: add VIDIOC_DQEVENT support 2011-07-27 17:53:20 -03:00
v4l2-ctrls.c [media] v4l2-ctrls: implement new volatile autocluster scheme 2011-09-21 10:48:30 -03:00
v4l2-dev.c [media] v4l: Don't access media entity after is has been destroyed 2011-06-30 23:12:36 -03:00
v4l2-device.c [media] v4l2: uvcvideo use after free bug fix 2011-09-21 16:52:52 -03:00
v4l2-event.c [media] v4l2-ctrls/v4l2-events: small coding style cleanups 2011-07-27 17:53:34 -03:00
v4l2-fh.c [media] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 2011-07-27 17:53:31 -03:00
v4l2-int-device.c
v4l2-ioctl.c [media] media: v4l: remove single to multiplane conversion 2011-09-06 15:03:10 -03:00
v4l2-mem2mem.c [media] media: mem2mem: eliminate possible NULL pointer dereference 2011-09-06 15:03:26 -03:00
v4l2-subdev.c [media] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 2011-07-27 17:53:31 -03:00
via-camera.c [media] [Resend] viacam: Don't explode if pci_find_bus() returns NULL 2011-09-11 09:33:39 -03:00
via-camera.h
videobuf2-core.c [media] media: vb2: change queue initialization order 2011-09-06 15:07:20 -03:00
videobuf2-dma-contig.c [media] media: vb2: dma contig allocator: use dma_addr instread of paddr 2011-09-06 15:05:10 -03:00
videobuf2-dma-sg.c [media] videobuf2: Do not unconditionally map S/G buffers into kernel space 2011-09-03 10:57:33 -03:00
videobuf2-memops.c [media] media: vb2: fix userptr VMA release seq 2011-09-06 15:05:21 -03:00
videobuf2-vmalloc.c [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
videobuf-core.c
videobuf-dma-contig.c Revert "[media] V4L: videobuf, don't use dma addr as physical" 2011-04-19 10:54:44 -07:00
videobuf-dma-sg.c [media] videobuf_pages_to_sg: sglist[0] length problem 2011-07-27 17:52:19 -03:00
videobuf-dvb.c
videobuf-vmalloc.c
vino.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
vino.h
vivi.c [media] vivi: add support for VIDIOC_LOG_STATUS 2011-09-21 10:51:10 -03:00
vp27smpx.c
vpx3220.c [media] vpx3220, bt819: fix compiler warnings 2011-09-06 14:46:17 -03:00
w9966.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
wm8739.c
wm8775.c
zr364xx.c [media] drivers/media/video/zr364xx.c: add missing cleanup code 2011-09-03 18:43:58 -03:00