commit_discard_dcache_range() is used in sd, lcd and pcm drivers
to handle transfers form/to data buffers so this should not introduce
any problems. It is reported to fix pop noise observed on some hifimans.
We apparently don't fully understand cache handling on this platform.
Change-Id: I436d291509f91d16a13d10965a28171fb27574ab
If interrupts trigger during cache invalidation this could cause memory
corruption. This should be right fix for commit_discard_idcache in
contrast to 72ebcbf and c1ec1ec.
Change-Id: I141fb585004d4a1967b0a03bc37db3964d886564
Reviewed-on: http://gerrit.rockbox.org/345
Tested-by: Andrew Ryabinin <ryabinin.a.a@gmail.com>
Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>
It seems something wrong with cache handling in rk27xx. OF always disable cache
before invalidating cache ways, therefore, now we do the same.
Hopefully this will fix cache handling, but I couldn't contend that it's really so.
Change-Id: I967c18211f0ddff689b6a17579fbe8685277f132
This version resembles how OF handle cache invalidates.
This seems to fix mysterious data aborts on plugin/codec loading
after introducing frequency scaling.
Credit goes to mortalis for pinpointing the reason of aborts.
Change-Id: I3477b3f65d593d7b43c36a0b06d863f71f000812
Implemented scheme:
ARM AHB APB
Normal 50 50 50 MHz
Max 200 100 50 MHz
Frequency scaling is disabled on rk27generic due to too
slow lcd updates when running with 50MHz AHB.
battery_bench shows ~1h runtime improvement on hifiman.
Change-Id: I2c6f8acf6d4570c4e14f5bcc72280b51ce13c408
For now it contains explicit SDRAM setup, cutting clock for unused
modules and turning off unused PLLs. This improves slightly mem
throughput as well as saves quite a bit of power.
Change-Id: I19a2827ac90a6868856c676fbe1e051c42f0d608
