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| author |   Chen-Yu Tsai <wens@csie.org> | 2017-10-12 16:37:04 +0800 |
|---|---|---|
| committer |   Maxime Ripard <maxime.ripard@free-electrons.com> | 2017-10-13 09:27:34 +0200 |
| commit | ee6501d69217a887cb496c42ff97ba43adff4ab1 (patch) | |
| tree | 8cc397672adf7e0adea9b5485fa03d9c32ed7523 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | clk: sunxi-ng: sun5i: Use sigma-delta modulation for audio PLL (diff) | |
| download | linux-dev-ee6501d69217a887cb496c42ff97ba43adff4ab1.tar.xz linux-dev-ee6501d69217a887cb496c42ff97ba43adff4ab1.zip | |
clk: sunxi-ng: sun6i: Use sigma-delta modulation for audio PLL
The audio blocks require specific clock rates. Until now we were using
the closest clock rate possible with integer N-M factors. This resulted
in audio playback being slightly slower than it should be.
The vendor kernel gets around this (for newer SoCs) by using sigma-delta
modulation to generate a fractional-N factor. As the PLL hardware is
identical in most chips, we can back port the settings from the newer
SoC, in this case the H3, onto the A31.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions