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| author | Amaury Pouly <amaury.pouly@gmail.com> | 2017-08-27 17:24:49 +0200 |
|---|---|---|
| committer | Amaury Pouly <amaury.pouly@gmail.com> | 2017-08-27 17:50:59 +0200 |
| commit | c7f897faa4276ade8fb26a3522ff5b3041b4cd56 (patch) | |
| tree | 6e560a2fb38797823817393c4ab917b5a6db6aeb /apps/plugins/SOURCES | |
| parent | b81c1555ef7025a23c8e1e6e27259983adac9e5d (diff) | |
| download | rockbox-c7f897faa4276ade8fb26a3522ff5b3041b4cd56.tar.gz rockbox-c7f897faa4276ade8fb26a3522ff5b3041b4cd56.zip | |
zen/zenxfi: always set EMI frequency to 130MHz
The ZEN/X-Fi (STMP3700) don't handle memory frequency scaling really well, for
this reason we run it at a fixed frequency. That frequency was previously set
to 64Mhz because when the CPU run at its lowest frequency, we set the VDD voltage
to 0.975 V and on STMP3700, VDDD=VDDDMEM and this is too low to run EMI at 130Mhz.
This is not a good solution because under heavy load, running the EMI at 64Mhz
results in frame drops and a sluggish device. Thus we now run the EMI at 130Mhz
all the time now. To do so, increase the minimum VDD voltage to 1.275 V.
This may result is a decreased battery life on those targets but it will also
avoid all sorts of glictches and all the device to truly run at full speed.
Change-Id: Ia8391492c29fe67bc2701aa7d8cfd00a9df349e8
Diffstat (limited to 'apps/plugins/SOURCES')
0 files changed, 0 insertions, 0 deletions