Hi guys,
The previous RockChip firmware didn't support sectors greater than 32KB.
It caused a USB device respawn and you were not able to mount the
filesystem correctly. Nevertheless, the speed was quite fine, not so
slow. It's weird that you see some very slow transfer rate.
To be honest, I haven't yet test with the latest RockChip firmware and
my devices are broken. Maybe RockChip has corrected this issue and we
can upgrade this entry.
@Andrey, if you make a new test and keep me posted, I will submit a new
patch.
On my side, I try to find a working RockChip based device to upgrade to
latest firmware and make a test.
Regards
JB
Pete Zaitcev wrote:
On Tue, 10 Nov 2009 23:25:14 +0500, Andrey Rahmatullin <wrar@xxxxxxxxxxxx> wrote:
idVendor 0x071b Domain Technologies, Inc.
idProduct 0x3203
bcdDevice 1.00
UNUSUAL_DEV( 0x071b, 0x3203, 0x0100, 0x0100,
"RockChip",
"ROCK MP3",
US_SC_DEVICE, US_PR_DEVICE, NULL,
US_FL_MAX_SECTORS_64),
If I understand correctly, this is the cause of very slow write speed. I
commented out these entries and rebuilt the kernel, now the write speed is
acceptable and I see no problems which could be fixed by
US_FL_MAX_SECTORS_64.
Can I somehow disable this quirk for my device
without patching the kernel?
You should talk to Jean-Baptiste and discover why he needed that
entry. Perhaps you haven't yet ran over the limitation. It's also
possible that Rock changed their firmware without bothering to
update the revision, or Explay patched something. We need to know
what exactly is happening.
Also, what is "very slow"? 32KB is not that bad, it cannot be very
"very". Heck ub always uses that much. Something is "very" fishy here.
-- Pete
--
Jean-Baptiste Onofré
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http://www.nanthrax.net
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jb@xxxxxxxxxxxx
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http://buildprocess.sourceforge.net
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