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Commit 1a895578 authored by Nicolin Chen's avatar Nicolin Chen Committed by Vinod Koul
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dma: imx-sdma: Add new dma type for ssi dual fifo script 



This patch adds a new DMA_TYPE for SSI dual FIFO script, included
in SDMA firmware version 2. This script would allow SSI use dual
fifo mode to transimit/receive data without occasional hardware
underrun/overrun.

Signed-off-by: default avatarNicolin Chen <b42378@freescale.com>
Acked-by: default avatarKumar Gala <galak@codeaurora.org>
Acked-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent cd72b846

Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt

+1 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ The full ID of peripheral types can be found below. 
	19	IPU Memory

	20	ASRC

	21	ESAI

	22	SSI Dual FIFO	(needs firmware ver >= 2)



The third cell specifies the transfer priority as below.

drivers/dma/imx-sdma.c

+4 −0
Original line number Diff line number Diff line
@@ -725,6 +725,10 @@ static void sdma_get_pc(struct sdma_channel *sdmac, 
		per_2_emi = sdma->script_addrs->app_2_mcu_addr;

		emi_2_per = sdma->script_addrs->mcu_2_app_addr;

		break;

	case IMX_DMATYPE_SSI_DUAL:

		per_2_emi = sdma->script_addrs->ssish_2_mcu_addr;

		emi_2_per = sdma->script_addrs->mcu_2_ssish_addr;

		break;

	case IMX_DMATYPE_SSI_SP:

	case IMX_DMATYPE_MMC:

	case IMX_DMATYPE_SDHC:

include/linux/platform_data/dma-imx.h

+1 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ enum sdma_peripheral_type { 
	IMX_DMATYPE_IPU_MEMORY,	/* IPU Memory */

	IMX_DMATYPE_ASRC,	/* ASRC */

	IMX_DMATYPE_ESAI,	/* ESAI */

	IMX_DMATYPE_SSI_DUAL,	/* SSI Dual FIFO */

};



enum imx_dma_prio {