Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-08-22 11:32 GMT+03:00 Matwey V. Kornilov : > 2016-08-22 1:00 GMT+03:00 Alan Stern : >> On Sun, 21 Aug 2016, Matwey V. Kornilov wrote: >> >>> In both cases (with or without HCD_BH), usb_hcd_giveback_urb is called >>> every 0.01 sec. It is not clear

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-08-22 1:00 GMT+03:00 Alan Stern : > On Sun, 21 Aug 2016, Matwey V. Kornilov wrote: > >> In both cases (with or without HCD_BH), usb_hcd_giveback_urb is called >> every 0.01 sec. It is not clear why behavior is so different. > > What behavior are you asking about?

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

On Sun, 21 Aug 2016, Matwey V. Kornilov wrote: > In both cases (with or without HCD_BH), usb_hcd_giveback_urb is called > every 0.01 sec. It is not clear why behavior is so different. What behavior are you asking about? The difference between HCD_BH set and not set? Alan Stern -- To

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

In both cases (with or without HCD_BH), usb_hcd_giveback_urb is called every 0.01 sec. It is not clear why behavior is so different. 2016-08-21 17:02 GMT+03:00 Matwey V. Kornilov : > I've just measured that > > it takes 150 us in average for pwc_isoc_handler to run > 350 us -

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

I've just measured that it takes 150 us in average for pwc_isoc_handler to run 350 us - __usb_hcd_giveback_urb So, it takes either 50 us (with HCD_BH) or 400 us (without) for usb_hcd_giveback_urb to run. 2016-08-20 21:09 GMT+03:00 Matwey V. Kornilov : > I've just checked

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

I've just checked 4.8-rc2 - same behaviour. 2016-08-18 16:31 GMT+03:00 Matwey V. Kornilov : > Any ideas? > > 2016-08-04 23:08 GMT+03:00 Matwey V. Kornilov : >> When DMA is not used, I see the same behavior: lots of zero-length >> packages received. >> >> Can

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

Any ideas? 2016-08-04 23:08 GMT+03:00 Matwey V. Kornilov : > When DMA is not used, I see the same behavior: lots of zero-length > packages received. > > Can It be related to some kind of USB overflow due to long input data > processing with disabled IRQ? > When HCD_BC is used

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

When DMA is not used, I see the same behavior: lots of zero-length packages received. Can It be related to some kind of USB overflow due to long input data processing with disabled IRQ? When HCD_BC is used then part of processing is postponed and this can explain greater throughput due to better

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

I've just found that in such cases, when DMA actual length is zero, both cppi41_channel->prog_len and txstate.residue equal 960 at musb_cppi41 line 225: http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/drivers/usb/musb/musb_cppi41.c#n225 2016-08-04 22:08 GMT+03:00 Matwey V.

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

I've just found that dma->actual_len equals to zero in most cases at musb_host.c line 1946. And this produces zero-length packages. http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/tree/drivers/usb/musb/musb_host.c#n1946 Any ideas why? 2016-08-04 19:57 GMT+03:00 Matwey V.

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

I've just found that many packages in URBs have zero actual_length (It is a question why). Then the following end of frame criteria leads to `frame underflow' message: if (flen < pdev->vlast_packet_size) { /* Shorter packet... end of frame */

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-08-01 20:06 GMT+03:00 Viresh Kumar : > On 01-08-16, 20:01, Matwey V. Kornilov wrote: >> With this patch, there is no cpufreq directory here. >> >> Without this patch, the output is the following: >> >> nohostname:~ # uname -a >> Linux nohostname

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

pwc module output with trace=511 is the following: [ 24.793109] usbcore: registered new interface driver Philips webcam [ 29.276979] pwc: Unsupported pixel format [ 29.277055] pwc: pwc_vidioc_fill_fmt() width=640, height=480, bytesperline=640, sizeimage=460800, pixelformat=YU12 [

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

On 01-08-16, 20:01, Matwey V. Kornilov wrote: > With this patch, there is no cpufreq directory here. > > Without this patch, the output is the following: > > nohostname:~ # uname -a > Linux nohostname 4.6.4-3.gecd9058-default #1 SMP PREEMPT Fri Jul 15 > 08:08:50 UTC 2016 (ecd9058) armv7l armv7l

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-08-01 19:50 GMT+03:00 Viresh Kumar : > On 31-07-16, 23:31, Matwey V. Kornilov wrote: >> Hello, >> >> I've also just found that the same commit breaks cpufreq on BeagleBone Black >> :) >> >> So, probably without HCD_BH flag musb works correctly only at 1Ghz CPU >>

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

On 31-07-16, 23:31, Matwey V. Kornilov wrote: > Hello, > > I've also just found that the same commit breaks cpufreq on BeagleBone Black > :) > > So, probably without HCD_BH flag musb works correctly only at 1Ghz CPU > frequency, which is unlisted and being set to 720Mhz by cpufreq driver > (as

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

Hello, I've also just found that the same commit breaks cpufreq on BeagleBone Black :) So, probably without HCD_BH flag musb works correctly only at 1Ghz CPU frequency, which is unlisted and being set to 720Mhz by cpufreq driver (as it did whet there was cpufreq driver). 2016-07-29 21:01

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

Hello, I've found that the following commit fixes the issue: commit 7694ca6e1d6f01122f05039b81f70f64b1ec4063 Author: Viresh Kumar Date: Fri Apr 22 16:58:42 2016 +0530 cpufreq: omap: Use generic platdev driver The cpufreq-dt-platdev driver supports creation

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

Hello, I've just bisected commit, which fixed the issue in v4.7 commit 9fa64d6424adabf0e3a546ae24d01a62a927b342 Merge: f55532a febce40 Author: Rafael J. Wysocki Date: Sat Apr 2 01:07:17 2016 +0200 Merge back intel_pstate fixes for v4.6. * pm-cpufreq:

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

Hello, I've just biseced commit, which introduced this issue commit f551e13529833e052f75ec628a8af7b034af20f9 Author: Bin Liu Date: Mon Apr 25 15:53:30 2016 -0500 Revert "usb: musb: musb_host: Enable HCD_BH flag to handle urb return in bottom half" I have not checked yet,

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-07-20 21:56 GMT+03:00 Matwey V. Kornilov : > 2016-07-20 18:06 GMT+03:00 Bin Liu : >> Hi, >> >> On Wed, Jul 20, 2016 at 05:44:56PM +0300, Matwey V. Kornilov wrote: >>> 2016-07-20 17:13 GMT+03:00 Bin Liu : >>> > Hi, >>> > >>> > On Wed, Jul 20, 2016

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-07-20 18:06 GMT+03:00 Bin Liu : > Hi, > > On Wed, Jul 20, 2016 at 05:44:56PM +0300, Matwey V. Kornilov wrote: >> 2016-07-20 17:13 GMT+03:00 Bin Liu : >> > Hi, >> > >> > On Wed, Jul 20, 2016 at 09:09:42AM +0300, Matwey V. Kornilov wrote: >> >> 2016-07-20 0:34

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

Hi, On Wed, Jul 20, 2016 at 05:44:56PM +0300, Matwey V. Kornilov wrote: > 2016-07-20 17:13 GMT+03:00 Bin Liu : > > Hi, > > > > On Wed, Jul 20, 2016 at 09:09:42AM +0300, Matwey V. Kornilov wrote: > >> 2016-07-20 0:34 GMT+03:00 Bin Liu : > >> > Hi, > >> > > >> > On Wed,

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-07-20 17:13 GMT+03:00 Bin Liu : > Hi, > > On Wed, Jul 20, 2016 at 09:09:42AM +0300, Matwey V. Kornilov wrote: >> 2016-07-20 0:34 GMT+03:00 Bin Liu : >> > Hi, >> > >> > On Wed, Jul 20, 2016 at 12:25:44AM +0300, Matwey V. Kornilov wrote: >> >> 2016-07-19 23:56

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

Hi, On Wed, Jul 20, 2016 at 09:09:42AM +0300, Matwey V. Kornilov wrote: > 2016-07-20 0:34 GMT+03:00 Bin Liu : > > Hi, > > > > On Wed, Jul 20, 2016 at 12:25:44AM +0300, Matwey V. Kornilov wrote: > >> 2016-07-19 23:56 GMT+03:00 Bin Liu : > >> > Hi, > >> > > >> > On Tue,

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-07-20 9:09 GMT+03:00 Matwey V. Kornilov : > 2016-07-20 0:34 GMT+03:00 Bin Liu : >> Hi, >> >> On Wed, Jul 20, 2016 at 12:25:44AM +0300, Matwey V. Kornilov wrote: >>> 2016-07-19 23:56 GMT+03:00 Bin Liu : >>> > Hi, >>> > >>> > On Tue, Jul 19, 2016

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-07-20 0:34 GMT+03:00 Bin Liu : > Hi, > > On Wed, Jul 20, 2016 at 12:25:44AM +0300, Matwey V. Kornilov wrote: >> 2016-07-19 23:56 GMT+03:00 Bin Liu : >> > Hi, >> > >> > On Tue, Jul 19, 2016 at 11:21:17PM +0300, mat...@sai.msu.ru wrote: >> >> Hello, >> >> >> >> I

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

Hi, On Wed, Jul 20, 2016 at 12:25:44AM +0300, Matwey V. Kornilov wrote: > 2016-07-19 23:56 GMT+03:00 Bin Liu : > > Hi, > > > > On Tue, Jul 19, 2016 at 11:21:17PM +0300, mat...@sai.msu.ru wrote: > >> Hello, > >> > >> I have Philips SPC 900 camera (0471:0329) connected to my AM335x

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

2016-07-19 23:56 GMT+03:00 Bin Liu : > Hi, > > On Tue, Jul 19, 2016 at 11:21:17PM +0300, mat...@sai.msu.ru wrote: >> Hello, >> >> I have Philips SPC 900 camera (0471:0329) connected to my AM335x based >> BeagleBoneBlack SBC. >> I am sure that both of them are fine and work properly.

Re: pwc over musb: 100% frame drop (lost) on high resolution stream

Hi, On Tue, Jul 19, 2016 at 11:21:17PM +0300, mat...@sai.msu.ru wrote: > Hello, > > I have Philips SPC 900 camera (0471:0329) connected to my AM335x based > BeagleBoneBlack SBC. > I am sure that both of them are fine and work properly. > I am running Linux 4.6.4 (my kernel config is available

pwc over musb: 100% frame drop (lost) on high resolution stream

Hello, I have Philips SPC 900 camera (0471:0329) connected to my AM335x based BeagleBoneBlack SBC. I am sure that both of them are fine and work properly. I am running Linux 4.6.4 (my kernel config is available at https://clck.ru/A2kQs ) and I've just discovered, that there is an issue with