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| author | Viorel Suman <viorel.suman@nxp.com> | 2018-08-27 14:40:45 +0300 |
|---|---|---|
| committer | Viorel Suman <viorel.suman@nxp.com> | 2018-09-05 10:43:48 +0300 |
| commit | 26be34a709a1fea299674d567c221e586bf58313 (patch) | |
| tree | bb22f52b3e0e17d4d53a91460c3ad25b1b138740 /Documentation/devicetree/bindings | |
| parent | 193755e4d0c62a89349ee6de06041b173ae3d62f (diff) | |
MLK-18898-5: ARM64: dts: imx8mq: change the sdma script for SAI
The IMX_DMATYPE_SAI(24) performance is not enough to support high
sample rate/channels of audio case, there is a lot of underrun and
the sound is noise, the reason is that with this script, sdma copy data
through a long path (SDMA->pl301_audio -> pl301_display -> … ->
pl301_wakeup -> AIPS1 -> SPBA2 -> SAI).
The IMX_DMATYPE_SSI_SP(2) performance is better, which go through a shorter
path (SDMA -> SPBA2 -> SAI).
So we switch to use the IMX_DMATYPE_SSI_SP script, then 384k/32b/16c is
supported well.
Cloned from commit d5b70e923221 ("MLK-18643: ARM64: dts: imx8mm: change the
sdma script for SAI").
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
(cherry picked from commit 390620091748db98216c2f95fe95fb4ac3284564)
Diffstat (limited to 'Documentation/devicetree/bindings')
0 files changed, 0 insertions, 0 deletions