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. Br, -Antti -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
