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| author |   Chen-Yu Tsai <wens@csie.org> | 2017-10-12 16:37:02 +0800 |
|---|---|---|
| committer |   Maxime Ripard <maxime.ripard@free-electrons.com> | 2017-10-13 09:27:23 +0200 |
| commit | de344851919493033cdaa5736b2bfbcb05b50038 (patch) | |
| tree | f76d8db4d91acbe968285a6b47615ffbebbc645c /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | clk: sunxi-ng: sun8i: h3: Use sigma-delta modulation for audio PLL (diff) | |
| download | linux-dev-de344851919493033cdaa5736b2bfbcb05b50038.tar.xz linux-dev-de344851919493033cdaa5736b2bfbcb05b50038.zip | |
clk: sunxi-ng: sun4i: 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 A10 and A20.
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