Commit 60f88c03 authored by Eugen Hristev's avatar Eugen Hristev Committed by Vinod Koul
Browse files

dmaengine: at_xdmac: adapt perid for mem2mem operations 



The PERID in the CC register for mem2mem operations must match an unused
PERID.
The PERID field is 7 bits, but the selected value is 0x3f.
On later products we can have more reserved PERIDs for actual peripherals,
thus this needs to be increased to maximum size.
Changing the value to 0x7f, which is the maximum for 7 bits field.

Signed-off-by: default avatarEugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: default avatarTudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20201016093725.289880-1-eugen.hristev@microchip.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent cb0362b6

drivers/dma/at_xdmac.c

+3 −3
Original line number Diff line number Diff line
@@ -867,7 +867,7 @@ at_xdmac_interleaved_queue_desc(struct dma_chan *chan, 
	 * match the one of another channel. If not, it could lead to spurious

	 * flag status.

	 */

	u32			chan_cc = AT_XDMAC_CC_PERID(0x3f)

	u32			chan_cc = AT_XDMAC_CC_PERID(0x7f)

					| AT_XDMAC_CC_DIF(0)

					| AT_XDMAC_CC_SIF(0)

					| AT_XDMAC_CC_MBSIZE_SIXTEEN
@@ -1049,7 +1049,7 @@ at_xdmac_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, 
	 * match the one of another channel. If not, it could lead to spurious

	 * flag status.

	 */

	u32			chan_cc = AT_XDMAC_CC_PERID(0x3f)

	u32			chan_cc = AT_XDMAC_CC_PERID(0x7f)

					| AT_XDMAC_CC_DAM_INCREMENTED_AM

					| AT_XDMAC_CC_SAM_INCREMENTED_AM

					| AT_XDMAC_CC_DIF(0)
@@ -1155,7 +1155,7 @@ static struct at_xdmac_desc *at_xdmac_memset_create_desc(struct dma_chan *chan, 
	 * match the one of another channel. If not, it could lead to spurious

	 * flag status.

	 */

	u32			chan_cc = AT_XDMAC_CC_PERID(0x3f)

	u32			chan_cc = AT_XDMAC_CC_PERID(0x7f)

					| AT_XDMAC_CC_DAM_UBS_AM

					| AT_XDMAC_CC_SAM_INCREMENTED_AM

					| AT_XDMAC_CC_DIF(0)