Re: [linux-sunxi] Re: Allwinner strips symbols from latest cedar binaries.
Am 26.03.2015 11:59 schrieb "Jens Lucius" : > > > Am Donnerstag, 26. März 2015 10:58:17 UTC+1 schrieb Simon Kenyon: >> >> On 03/26/15 09:44, Michal Suchanek wrote: >> > It was only worth having this list while decent Allwinner hardware was >> > produced and Allwinner was somewhat cooperative with respect to >> > development. It seems that period of both decent hardware based on >> > Allwinner chips and Allwinner cooperation has ceased so there is not >> > much point anymore except using the existing somewhat obsolete >> > devices. Thanks Michal >> +1 > > >> >> +1 > > > But whats the alternative? Who is better supporting linux? Rockchip? Mediatek? > > For declining quality see > https://olimex.wordpress.com/2015/03/23/adafruit-ranked-11-from-top-20-us-manufacturers/#comment-18201 > > -- > You received this message because you are subscribed to the Google Groups "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. That quality stuff is bitter. Stripping symbols is pretty headless, especially when a lot of people with reverse engineering watching those source pernickety :) Amlogic have a lot stuff released a lot of code. But some of it lacks appropriate licence information in my opinion. But some kernel modules are binary only like NAND. Seems freescale does at the moment the best job. Regards, Christian -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [linux-sunxi] Re: [PATCH][RFC] Add standalone driver for the A20 Soc TP embedded temperature sensor
Am 05.11.2014 12:44 schrieb : > > clabbe.montjoie wrote: > > For the temperature value, I cannot found any document on how to transform the raw value in °C. > > [...] > > Under heavy loads, the temperature of both sensors rise linearly. > > But based on a series of tests with and without heatsinks applied to the A20 I came to the conclusion that the values reported here must be already pre-calibrated. The base idle temperatures reported without an applied heatsink are way higher compared to the value of the very same A20 with heatsink: > > http://forum.lemaker.org/forum.php?mod=redirect&goto=findpost&ptid=8137&pid=40817 > > Does anyone have a clue how the A20's CHOP_TEMP_EN register (according to the A20's user manual: "Chop temperature calibration enable: 0: Disable, 1: Enable") can be read/set? For read write access from user space you can try to use devmem2 with the address given in the user manual. http://manpages.ubuntu.com/manpages/natty/man1/devmem2.1.html Regards, Christian > > -- > You received this message because you are subscribed to the Google Groups "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [linux-sunxi] ICplus IP101A
Am 24.10.2014 22:34 schrieb "Tim Tisdall" : > > On Fri, Oct 24, 2014 at 3:51 PM, Christian Ege wrote: >> >> Am 23.10.2014 20:17 schrieb "Tim Tisdall" : >> > >> > Does anyone have a device with an ICplus IP101A PHYceiver that's properly working? I've had it working intermittently but not consistently. I'm at a loss as to what the issue could be. >> > >> I do not own one. But maybe this is an issue with clock skew. Some Phy's allow the setting of a clock skew. We had stability issues with a micrel phy and fixed them by tuning clock skew. > > How does one do that? Did you have to modify the kernel driver source code to make those changes? > We did this for a different platform I.mx6 based. As a first approach we patched u-boot and kernel a second one was using device tree. As I remember there had been patches to tweak this from user space as well. The values itself have been calculated be some h/w eng. We used the dived and concur approach which resulted in the same values. Regards, Christian > -- > You received this message because you are subscribed to the Google Groups "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [linux-sunxi] ICplus IP101A
Am 23.10.2014 20:17 schrieb "Tim Tisdall" : > > Does anyone have a device with an ICplus IP101A PHYceiver that's properly working? I've had it working intermittently but not consistently. I'm at a loss as to what the issue could be. > I do not own one. But maybe this is an issue with clock skew. Some Phy's allow the setting of a clock skew. We had stability issues with a micrel phy and fixed them by tuning clock skew. > Of course, it seems to have no issues with the stock Android ROM that comes with the device. > regards, Christian > -- > You received this message because you are subscribed to the Google Groups "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [linux-sunxi] Are there any HDMI-CEC related information for A10/A20 available?
Hi,
Am 03.10.2014 um 09:56 schrieb Vladimir Komendantskiy:
The Allwinner SoCs that have an HDMI pin, also have a memory-mapped
HDMI-CEC register located at HDMI base 0xf1c16000 plus the offset
0x214. This register provides the following bits
#define CEC_RX 0x0100 /* phys. line value, either high or low */
#define CEC_TX 0x0200
#define CEC_ENABLE 0x0800
Other bits are unused.
I asked Allwinner about CEC once but they only replied that A10s
doesn't have a hardware CEC core.
You can find examples of using the CEC register in some unfinished CEC
code in the 3.4 linux-sunxi kernel.
Thx, a lot I found this PATCH
https://groups.google.com/forum/#!msg/linux-sunxi/cNbMiwzgGJ0/tK-KvXkn-pQJ
And the source
https://github.com/linux-sunxi/linux-sunxi/blob/sunxi-3.4/drivers/video/sunxi/hdmi/hdmi_cec.c
I'll take a closer look on this. It looks like they do bitbanging on
those two bits.
regards,
Christian
--Vladimir
On 3 October 2014 07:33, Chen-Yu Tsai <mailto:w...@csie.org>> wrote:
Hi,
On Fri, Oct 3, 2014 at 3:29 AM, jonsm...@gmail.com
<mailto:jonsm...@gmail.com> mailto:jonsm...@gmail.com>> wrote:
> I
>
> On Thu, Oct 2, 2014 at 1:19 PM, Christian Ege mailto:k423...@gmail.com>> wrote:
>> During a quick search I had not been able to find any HDMI CEC
driver. In
>> the docs available there is only one Register about CEC.
>>
>> I thought about implementation of an driver and libcec support
for the A20.
>
> I believe CEC is just I2C on the HDMI connector.
>
> So maybe --- it is one of the I2C devices. Then that bit enables it
> onto the HDMI pin? Just a guess.
>
> EDID works the same way. How is it implemented?
You are referring to DDC. The HDMI block has a separate DDC
controller.
IIRC, the DDC pins also have standard TWI muxed on them, so you could
use either one.
But this is entirely irrelevant to the original question.
As Christian stated, the HDMI block does have a register named
HDMI_HDP_CEC. However it does not contain any useful descriptions.
Also the SoC does have a pin for HDMI CEC.
Best ask Allwinner for some help.
ChenYu
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[linux-sunxi] Are there any HDMI-CEC related information for A10/A20 available?
During a quick search I had not been able to find any HDMI CEC driver. In the docs available there is only one Register about CEC. I thought about implementation of an driver and libcec support for the A20. Regards, Christian -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
