Hi,
On 25-12-14 10:48, [email protected] wrote:
I'll check this on Monday and post the results.
3.19 has this patch:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/ata/ahci_sunxi.c?id=35c16a8f0b994461d49ce2479c67903f95045159
Which allows you to specify ahci_sunxi.enable_pmp=1 on the kernel
commandline for use with port multipliers.
I've been running my own tests with a port multiplier, and the reason why
the original allwinner code has the AHCI_HFLAG_NO_PMP flag is because
while port multipliers will work without it, normal disks will break if
that flag is not set. So I've added a module option which
will remove the flag when set for use with port multipliers.
Regards,
Hans
Am Mittwoch, 24. Dezember 2014 15:37:26 UTC+1 schrieb arete74:
hi, you can report the speed transfer with sata pm?
regards
2014-12-23 22:03 GMT+01:00 <[email protected] <javascript:>>:
The A20 supports PMP, just remove the Flag AHCI_HFLAG_NO_PMP in the sunxi
ahci driver.
Please take a look in the Manual of the A20 (6.15.1). The SATA interface
has the following specification:
Comply with SATA Spec. 2.6, and AHCI Revision 1.3 specifications
This includes the PMP support.
We are using a Marvel PMP and it works fine - both disks are detected and
work.
Regards
Tobias
Am Dienstag, 23. Dezember 2014 11:55:58 UTC+1 schrieb bruce bushby:
Any progress on this? I found this thread:
http://forum.lemaker.org/thread-9207-1-1-.html
Which states:
"....the patch seems to work with the latest 3.18 kernel from Torvalds'
git (3.18.0.-rc5) possibly with some earlier versions..."
1. [ 1.735879] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl
300)
2. [ 1.742372] ata1.15: Port Multiplier 1.2, 0x197b:0x0325 r0, 5
ports, feat 0x5/0xf
But apparently it's very slow ...although no figures given. Guess there
is also the fear of data corruption given the lack of uptake/testing of
AllWinner PMP
Bruce
On Monday, 5 May 2014 22:22:48 UTC+1, hase nase wrote:
Hi,
is it possible to use an sata multiplier with a A20 ? I tried it on a
cubieboard, but i only got access to sda and no other connected drive
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