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| author |   Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2017-11-16 04:36:51 +0000 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2017-11-16 11:02:04 +0000 |
| commit | c20c6704bf2dafaba0d90c8310ef9e919fe4d2e2 (patch) | |
| tree | 3a97c9f15ca9dbde6f98b5822f71682219386711 /sound/soc/rockchip | |
| parent | Merge remote-tracking branches 'asoc/topic/tfa9879', 'asoc/topic/ts3a277e', 'asoc/topic/wm8741', 'asoc/topic/wm97xx' and 'asoc/topic/zte' into asoc-next (diff) | |
| download | linux-dev-c20c6704bf2dafaba0d90c8310ef9e919fe4d2e2.tar.xz linux-dev-c20c6704bf2dafaba0d90c8310ef9e919fe4d2e2.zip | |
ASoC: rcar: revert IOMMU support so far
commit 4821d914fe74 ("ASoC: rsnd: use dma_sync_single_for_xxx() for
IOMMU") had supported IOMMU, but it breaks normal sound "recorde"
and both PulseAudio's "playback/recorde". The sound will be noisy.
That commit was using dma_sync_single_for_xxx(), and driver should
make sure memory is protected during CPU or Device are using it.
But if driver returns current "residue" data size correctly on pointer
function, player/recorder will access to protected memory.
IOMMU feature should be supported, but I don't know how to handle it
without memory cache problem at this point.
Thus, this patch simply revert it to avoid current noisy sound.
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Tested-by: Ryo Kodama <ryo.kodama.vz@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/rockchip')
0 files changed, 0 insertions, 0 deletions