[meta-freescale] Use FIQ instead of dma for ssi audio

[J U]

Hello,

I would like to disable the dma transfers on ssi1 using FIQ instead.  I am
able to transfer data out successfully to an SGTL5000 codec (using
imx-sgtl5000.c as machine driver) with dma enabled.  The imx6 is the
bitclock and frame sync slave.  In the devicetree I added
"fsl,fiq-stream-filter" which I see in fsl_ssi.c is checked for and set's
the variable use_dma to false.  Are there any additional things to do
besides changing the devicetree to get this to work?


When I run aplay I get continuous underrun errors, no sound.  Any advice
would be appreciated, thanks!



I'm using freescale linux version 3.14.28



imx6qdl.dtsi =


ssi1: ssi at 02028000 {compatible = "fsl,imx6q-ssi","fsl,imx21-ssi";reg =
<0x02028000 0x4000>;interrupts = <0 46 IRQ_TYPE_LEVEL_HIGH>;clocks = <&clks
IMX6QDL_CLK_SSI1_IPG>,              <&clks IMX6QDL_CLK_SSI1>;clock-names =
"ipg", "baud";*fsl,fiq-stream-filter;*dmas = <&sdma 37 1 0>,       <&sdma
38 1 0>;dma-names = "rx", "tx";fsl,fifo-depth = <15>;fsl,ssi-dma-events =
<38 37>;status = "okay";};

Thank you,
Joseph
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