On 02/19/2015 12:21 PM, Antti Seppälä wrote:
On 19 February 2015 at 11:43, Benjamin Larsson <benjamin@xxxxxxxxxxxx> wrote:
On 2015-02-19 10:13, Antti Seppälä wrote:
It seems that currently the firmware download on the mn88472 is
somehow wrong for my Astrometa HD-901T2.
Reducing the download chunk size (mn88472_config.i2c_wr_max) to 2
makes the firmware download consistently succeed.
Hi, try adding the workaround patch I sent for this.
[PATCH 1/3] rtl28xxu: lower the rc poll time to mitigate i2c transfer errors
I now see that it hasn't been merged. But I have been running with this
patch for a few months now without any major issues.
The patch really did improve firmware loading. Weird...
Even with it I still get occasional i2c errors from r820t:
[ 15.874402] r820t 8-003a: r820t_write: i2c wr failed=-32 reg=0a len=1: da
[ 81.455517] r820t 8-003a: r820t_read: i2c rd failed=-32 reg=00
len=4: 69 74 e6 df
[ 99.949702] r820t 8-003a: r820t_read: i2c rd failed=-32 reg=00
len=4: 69 74 e6 df
These errors seem to appear more often if I'm reading the signal
strength values using e.g. femon.
Could you disable whole IR polling and test
modprobe dvb_usb_v2 disable_rc_polling=1
It is funny that *increasing* RC polling makes things better, though...
regards
Antti
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