> Date: Sat, 17 Jun 2006 09:52:40 +0200
> From: Hans Verkuil <[EMAIL PROTECTED]>
> Subject: Re: [ivtv-devel] Potential fix for DMA problems
> To: Discussion list for development of the IVTV driver
> <[email protected]>
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset="iso-8859-1"
>
> On Saturday 17 June 2006 02:39, Brian Bustin wrote:
>> I made 3 changes recently that seem to have made all the difference
>> in the world. The system has been up for a little over 17 hours and
>> it seems pretty solid.
>>
>> The three changes that I made were:
>> 1. In General Settings I removed Optimize for size
>> * I had not realized that this option was selected in the
>> first place. It very clearly notes that it may cause problems with
>> certain compilers.
>
> Which gcc version do you have? (gcc --version) If you have a recent
> gcc
> I don't think this is the cause of the problem.
>
>>
>> 2. In Bus Options and then PCI Support I removed Unordered IO
>> Mapping
>> * I had also not realized that this was selected. The help
>> text clearly notes that it is experimental code, and will only work
>> properly for drivers that have been coded for specific platforms.
>
> I don't have that option in my vanilla kernel. Seems to be a patch
> gentoo added. Actually, this sounds like something that can cause
> problems. What does it do?
>
>> 3. I am now using the kernelspace ondemand cpu frequency scaler
>> instead of using cpudyn
>
> I personally am running powernowd and I never had any problems with
> that
> cpu scaler.
>
>>
>> System:
>> Athlon 64 3000+
>> 1 Gig of Ram
>> ASUS A8N-SLI
>> SATA hard drives using libata
>> 2 PVR-150
>> 1 HD3000
>> Gentoo Linux
>> IVTV 0.6.2
>> kernel: linux-2.6.16-gentoo-r9
>> MythTV 0.19
>>
>> There is more information about this on my blog:
>> http://www.morph3ous.net/2006/06/16/solution-to-ivtv-drivers-ivtv0-
>> warning-enc-0-dma-error-0x0000000b/
>>
>> I hope that this is helpful.
>
> Certainly. Can you also post your INIT IVTV messages from the kernel
> log?
>
> Thanks,
>
> Hans
I apologize in advance for sending 3 emails. I realized that the
other 2 emails did not get connected with this thread. Must be
because I subscribe to the digests and actually created a new message
with the same subject thinking it would work.
I have gcc version:
gcc (GCC) 3.4.5 (Gentoo 3.4.5, ssp-3.4.5-1.0, pie-8.7.9)
The unordered IO mapping gives this information in its help text:
CONFIG_UNORDERED_IO:
Use unordered stores to access IO memory mappings in device drivers.
Still very experimental. When a driver works on IA64/ppc64/pa-
risc it should
work with this option, but it makes the drivers behave differently
from i386. Requires that the driver writer used memory barriers
properly.
Symbol: UNORDERED_IO [=n]
Prompt: Unordered IO mapping access
Defined at arch/x86_64/Kconfig:515
Depends on: EXPERIMENTAL
Location:
-> Bus options (PCI etc.)
My IVTV INIT is:
ivtv: ==================== START INIT IVTV ====================
ivtv: version 0.6.2 (tagged release) loading
ivtv: Linux version: 2.6.16-gentoo-r9 gcc-3.4
ivtv: In case of problems please include the debug info between
ivtv: the START INIT IVTV and END INIT IVTV lines, along with
ivtv: any module options, when mailing the ivtv-users mailinglist.
ivtv0: Autodetected Hauppauge WinTV PVR-150 card (cx23416 based)
ACPI: PCI Interrupt Link [APC1] enabled at IRQ 16
GSI 21 sharing vector 0xD9 and IRQ 21
ACPI: PCI Interrupt 0000:05:06.0[A] -> Link [APC1] -> GSI 16 (level,
low) -> IRQ 21
ivtv0: Unreasonably low latency timer, setting to 64 (was 32)
tveeprom 2-0050: Hauppauge model 26052, rev C199, serial# 8165771
tveeprom 2-0050: tuner model is TCL 2002N 5H (idx 99, type 50)
tveeprom 2-0050: TV standards NTSC(M) (eeprom 0x08)
tveeprom 2-0050: audio processor is CX25843 (idx 37)
tveeprom 2-0050: decoder processor is CX25843 (idx 30)
tveeprom 2-0050: has no radio, has IR remote
tuner 2-0061: chip found @ 0xc2 (ivtv i2c driver #0)
cx25840 2-0044: cx25843-23 found @ 0x88 (ivtv i2c driver #0)
cx25840 2-0044: loaded v4l-cx25840.fw firmware (14264 bytes)
wm8775 2-001b: chip found @ 0x36 (ivtv i2c driver #0)
ivtv0: loaded v4l-cx2341x-enc.fw firmware (262144 bytes)
ivtv0: Encoder revision: 0x02050032
ivtv0: Allocate DMA encoder MPEG stream: 128 x 32768 buffers (4096KB
total)
ivtv0: Allocate DMA encoder YUV stream: 194 x 10800 buffers (2048KB
total)
ivtv0: Allocate DMA encoder VBI stream: 120 x 17472 buffers (2048KB
total)
ivtv0: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers
(2048KB total)
tuner 2-0061: type set to 50 (TCL 2002N)
ivtv0: Initialized Hauppauge WinTV PVR-150, card #0
ivtv: ====================== NEXT CARD ======================
ivtv1: Autodetected Hauppauge WinTV PVR-150 card (cx23416 based)
ACPI: PCI Interrupt 0000:05:08.0[A] -> Link [APC3] -> GSI 18 (level,
low) -> IRQ 20
ivtv1: Unreasonably low latency timer, setting to 64 (was 32)
tuner 3-0061: chip found @ 0xc2 (ivtv i2c driver #1)
cx25840 3-0044: cx25841-23 found @ 0x88 (ivtv i2c driver #1)
cx25840 3-0044: loaded v4l-cx25840.fw firmware (14264 bytes)
wm8775 3-001b: chip found @ 0x36 (ivtv i2c driver #1)
tveeprom 3-0050: Hauppauge model 26032, rev C199, serial# 7841418
tveeprom 3-0050: tuner model is TCL 2002N 5H (idx 99, type 50)
tveeprom 3-0050: TV standards NTSC(M) (eeprom 0x08)
tveeprom 3-0050: audio processor is CX25841 (idx 35)
tveeprom 3-0050: decoder processor is CX25841 (idx 28)
tveeprom 3-0050: has no radio, has IR remote
ivtv1: loaded v4l-cx2341x-enc.fw firmware (262144 bytes)
ivtv1: Encoder revision: 0x02050032
ivtv1: Allocate DMA encoder MPEG stream: 128 x 32768 buffers (4096KB
total)
ivtv1: Allocate DMA encoder YUV stream: 194 x 10800 buffers (2048KB
total)
ivtv1: Allocate DMA encoder VBI stream: 120 x 17472 buffers (2048KB
total)
ivtv1: Allocate DMA encoder PCM audio stream: 455 x 4608 buffers
(2048KB total)
tuner 3-0061: type set to 50 (TCL 2002N)
ivtv1: Initialized Hauppauge WinTV PVR-150, card #1
ivtv: ==================== END INIT IVTV ====================
Hope this is helpful.
Thanks,
Brian
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