Yes, thats right. Forgot this to mention. Our custom A20 board has always a port multiplier on it.
2014-12-25 10:59 GMT+01:00 Hans de Goede <[email protected]>: > 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 >>>>>> >>>>>> -- >>>>> >>>> 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 [email protected] <javascript:>. >>>> 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 [email protected]. > 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
