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05b2723387
android_kernel_xiaomi_sm8350/drivers/media/video
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Trent Piepho 05b2723387 V4L/DVB (6083): cx88-alsa: Rework buffer handling 
Rework the way the DMA buffer is handled and IRQs are generated.

ALSA uses a ring-buffer of multiple periods.  Each period is supposed to
corrispond to one IRQ.

The existing driver was generating one interrupt per ring-buffer, as opposed
to per period.  This meant that as soon as the IRQ was generated, the hardware
was already starting to re-write the beginning of the buffer.  Since the DMA
happens on a per-line basis, there was only a narrow window to copy the data
out before the buffer was overwritten.

The cx88 core RISC program generator is modified so that it can set the IRQ
and counter flags to count every X lines of DMA transfer.  This way we can
generate an interrupt every period instead of every full ring-buffer.  Right
now only period of one line are supported, but it should be possible to
support longer periods.  Note that a WRITE instruction generates an IRQ when
it starts, not when the transfer is finished.  Thus to generate an IRQ when
line X is done, one must set the IRQ flag on the instruction that starts line
X+1, not the one that ends line X.

Change the line size so that there are four lines in the SRAM FIFO.  If there
are not four lines, the analog output from the cx88's internal DACs is full of
clicks and pops.

Try to handle FIFO sync errors.  Sometimes the chip generates many of these
errors before audio data starts.  Up to 50 sync errors will be ignored and the
counter reset.

Have the IRQ handler save the RISC counter to the chip struct, and then have
the pointer callback use this to calculate the pointer position.  We could
read the counter from the pointer callback, but sometimes the sync errors on
start up cause the counter to go crazy.  ALSA sees this and thinks there has
been an overrun.  The IRQ hander can avoid saving the counter position on
sync errors.

The chip "opened" flag wasn't necessary.  ALSA won't try to open the same
substream multiple times.  Probably this code was cut&pasted from the bt87x
driver, which has multiple sub-streams for one chip.

Do error checking for the videobuf mapping functions.

snd_card_cx88_runtime_free() is useless and can be deleted.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2007-10-09 22:06:34 -03:00
..
bt8xx V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
cpia2 V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
cx88 V4L/DVB (6083): cx88-alsa: Rework buffer handling 2007-10-09 22:06:34 -03:00
cx25840 V4L/DVB (6051): cx25840: make proper use of SOFT_RESET 2007-10-09 22:05:38 -03:00
em28xx V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
et61x251 V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
ivtv V4L/DVB (6081): ivtv: Fix static structure initialization 2007-10-09 22:06:24 -03:00
ovcamchip V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
pvrusb2 V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
pwc V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
saa7134 V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
sn9c102 V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
usbvideo some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
usbvision V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
zc0301 V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
adv7170.c V4L/DVB (5819): Cleanup: reorder some includes 2007-07-18 14:24:35 -03:00
adv7175.c V4L/DVB (5819): Cleanup: reorder some includes 2007-07-18 14:24:35 -03:00
arv.c V4L/DVB (5983): Arv.c: fix memset in ioctl 2007-10-09 22:04:40 -03:00
bt819.c V4L/DVB (5819): Cleanup: reorder some includes 2007-07-18 14:24:35 -03:00
bt856.c V4L/DVB (5819): Cleanup: reorder some includes 2007-07-18 14:24:35 -03:00
bt866.c V4L/DVB (5858): Use msecs_to_jiffies instead of HZ on media/video I2C drivers 2007-07-20 17:35:49 -03:00
btcx-risc.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
btcx-risc.h
bw-qcam.c
bw-qcam.h
c-qcam.c V4L/DVB (5860): Use msecs_to_jiffies instead of HZ on some webcam drivers 2007-07-20 17:35:50 -03:00
cafe_ccic-regs.h V4L/DVB (5690): Cafe_ccic: Properly power down the sensor 2007-05-22 16:16:27 -03:00
cafe_ccic.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
compat_ioctl32.c V4L/DVB (5989): V4L: Add additional ioctls to compat_ioctl32 2007-10-09 22:04:45 -03:00
cpia_pp.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
cpia_usb.c
cpia.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
cpia.h header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
cs53l32a.c V4L/DVB (5355): Add VIDIOC_G_CHIP_IDENT to various i2c modules 2007-04-27 15:43:50 -03:00
cs8420.h
cx2341x.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
dabfirmware.h
dabusb.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
dabusb.h
dpc7146.c
font.h
hexium_gemini.c
hexium_orion.c
ibmmpeg2.h
indycam.c
indycam.h
ir-kbd-i2c.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
Kconfig V4L/DVB (5929): Add vp27smpx driver 2007-10-09 22:03:25 -03:00
ks0127.c
ks0127.h
Makefile V4L/DVB (5929): Add vp27smpx driver 2007-10-09 22:03:25 -03:00
meye.c PCI: Change all drivers to use pci_device->revision 2007-07-11 16:02:10 -07:00
meye.h meye: make meye use sony-laptop instead of sonypi 2007-04-28 22:06:02 -04:00
msp3400-driver.c V4L/DVB (5953): msp3400-driver.c: kmalloc + memset conversion to kzalloc 2007-10-09 22:03:40 -03:00
msp3400-driver.h V4L/DVB (5355): Add VIDIOC_G_CHIP_IDENT to various i2c modules 2007-04-27 15:43:50 -03:00
msp3400-kthreads.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
mt20xx.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
mxb.c
mxb.h
ov511.c
ov511.h header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
ov7670.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
planb.c some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
planb.h V4L/DVB (5551): Plan-b: header change 2007-04-27 15:45:53 -03:00
pms.c
saa711x_regs.h
saa711x.c PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
saa5246a.c
saa5246a.h
saa5249.c V4L/DVB (5858): Use msecs_to_jiffies instead of HZ on media/video I2C drivers 2007-07-20 17:35:49 -03:00
saa6588.c
saa7110.c V4L/DVB (5858): Use msecs_to_jiffies instead of HZ on media/video I2C drivers 2007-07-20 17:35:49 -03:00
saa7111.c V4L/DVB (5819): Cleanup: reorder some includes 2007-07-18 14:24:35 -03:00
saa7114.c V4L/DVB (5819): Cleanup: reorder some includes 2007-07-18 14:24:35 -03:00
saa7115.c V4L/DVB (5414): Add missing kfree in early exit of saa7115. 2007-04-27 15:44:31 -03:00
saa7121.h
saa7127.c V4L/DVB (5306): Add support for VIDIOC_G_CHIP_IDENT 2007-04-27 15:43:27 -03:00
saa7146.h
saa7146reg.h
saa7185.c V4L/DVB (5819): Cleanup: reorder some includes 2007-07-18 14:24:35 -03:00
saa7191.c V4L/DVB (6148): Fix a warning at saa7191_probe 2007-09-14 13:13:42 -03:00
saa7191.h
saa7196.h
se401.c V4L/DVB (5490): Drivers/media/video/se401.c: check kmalloc() return value. 2007-04-27 15:45:21 -03:00
se401.h header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
stradis.c V4L/DVB (5831): stradis: use ARRAY_SIZE 2007-07-18 14:24:42 -03:00
stv680.c V4L/DVB (5790): Fix error handling for stv680 2007-07-18 14:24:21 -03:00
stv680.h
tcm825x.c V4L/DVB (5863): TCM825x: Add driver. 2007-10-09 22:02:53 -03:00
tcm825x.h V4L/DVB (5863): TCM825x: Add driver. 2007-10-09 22:02:53 -03:00
tda7432.c V4L/DVB (5492): Remove useless includes of i2c-algo-bit.h 2007-04-27 15:45:23 -03:00
tda8290.c V4L/DVB (6075): tuner: kernel headers go above subsystem headers 2007-10-09 22:06:04 -03:00
tda9840.c
tda9840.h
tda9875.c V4L/DVB (5492): Remove useless includes of i2c-algo-bit.h 2007-04-27 15:45:23 -03:00
tda9887.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
tea5761.c V4L/DVB (6075): tuner: kernel headers go above subsystem headers 2007-10-09 22:06:04 -03:00
tea5767.c V4L/DVB (6075): tuner: kernel headers go above subsystem headers 2007-10-09 22:06:04 -03:00
tea6415c.c
tea6415c.h
tea6420.c
tea6420.h
tlv320aic23b.c
tuner-3036.c
tuner-core.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
tuner-driver.h V4L/DVB (6074): tuner: fix ifdef tags to match actual file name 2007-10-09 22:06:04 -03:00
tuner-simple.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
tuner-types.c V4L/DVB (5978): tuner: Better tuner radio support 2007-10-09 22:04:34 -03:00
tvaudio.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
tveeprom.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
tvmixer.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
tvp5150_reg.h
tvp5150.c V4L/DVB (5739): Replace C code with calls to ARRAY_SIZE macro. 2007-07-18 14:23:52 -03:00
upd64031a.c V4L/DVB (5355): Add VIDIOC_G_CHIP_IDENT to various i2c modules 2007-04-27 15:43:50 -03:00
upd64083.c V4L/DVB (5355): Add VIDIOC_G_CHIP_IDENT to various i2c modules 2007-04-27 15:43:50 -03:00
v4l1-compat.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
v4l2-common.c V4L/DVB (5869): Add check for valid control ID to v4l2_ctrl_next. 2007-07-20 17:35:53 -03:00
v4l2-int-device.c V4L/DVB (5940): Export v4l2_int_device_{, un}register 2007-10-09 22:03:30 -03:00
video-buf-dvb.c V4L/DVB (5988): Fix OOP on videobuf-dvb when hibernating 2007-10-09 22:04:45 -03:00
video-buf.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
videocodec.c V4L/DVB (5489): Codec.c: check kmalloc() return value. 2007-04-27 15:45:20 -03:00
videocodec.h
videodev.c V4L/DVB (5982): Dev.c: memset fix 2007-10-09 22:04:39 -03:00
vino.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
vino.h
vivi.c V4L/DVB (6014): vivi: use videobuf_read_stream() 2007-10-09 22:05:10 -03:00
vp27smpx.c V4L/DVB (6044): vp27smpx: clarify history of this source. 2007-10-09 22:05:30 -03:00
vpx3220.c
w9966.c
w9968cf_decoder.h
w9968cf_vpp.h
w9968cf.c V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files 2007-10-09 22:06:17 -03:00
w9968cf.h
wm8739.c V4L/DVB (5880): wm8775/wm8739: Fix memory leak when unloading module 2007-07-20 17:35:57 -03:00
wm8775.c V4L/DVB (5880): wm8775/wm8739: Fix memory leak when unloading module 2007-07-20 17:35:57 -03:00
zoran_card.c V4L/DVB (5885): zr36067: Fix problems with module parameters 2007-10-09 22:02:58 -03:00
zoran_card.h V4L/DVB (5884): zr36067: clean up debug function 2007-10-09 22:02:57 -03:00
zoran_device.c V4L/DVB (5885): zr36067: Fix problems with module parameters 2007-10-09 22:02:58 -03:00
zoran_device.h
zoran_driver.c V4L/DVB (5981): Zoran_driver.c: fix memset in ioctl 2007-10-09 22:04:38 -03:00
zoran_procfs.c V4L/DVB (5884): zr36067: clean up debug function 2007-10-09 22:02:57 -03:00
zoran_procfs.h
zoran.h V4L/DVB (5890): zr36067: Add UYVY, RGB555X, RGB565X, and RGB32 formats 2007-07-30 16:26:26 -03:00
zr364xx.c V4L/DVB (5792): Zr364xx: add support for Trust Powerc@m 970Z 2007-07-18 14:24:23 -03:00
zr36016.c V4L/DVB (6078): Coding style fix drivers/media/video/zr36016.c 2007-10-09 22:06:07 -03:00
zr36016.h
zr36050.c V4L/DVB (6077): Coding style fix drivers/media/video/zr36050.c 2007-10-09 22:06:06 -03:00
zr36050.h
zr36057.h
zr36060.c V4L/DVB (6076): Coding style fix drivers/media/video/zr36060.c 2007-10-09 22:06:05 -03:00
zr36060.h