51 lines
1.9 KiB
Diff
51 lines
1.9 KiB
Diff
From 1dccaa4c1e99cd8bd27684a2c87ec806d426c088 Mon Sep 17 00:00:00 2001
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From: Eugen Hristev <eugen.hristev@microchip.com>
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Date: Fri, 16 Oct 2020 12:37:25 +0300
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Subject: [PATCH 132/247] dmaengine: at_xdmac: adapt perid for mem2mem
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operations
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The PERID in the CC register for mem2mem operations must match an unused
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PERID.
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The PERID field is 7 bits, but the selected value is 0x3f.
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On later products we can have more reserved PERIDs for actual peripherals,
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thus this needs to be increased to maximum size.
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Changing the value to 0x7f, which is the maximum for 7 bits field.
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Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
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Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
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Link: https://lore.kernel.org/r/20201016093725.289880-1-eugen.hristev@microchip.com
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Signed-off-by: Vinod Koul <vkoul@kernel.org>
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---
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drivers/dma/at_xdmac.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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--- a/drivers/dma/at_xdmac.c
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+++ b/drivers/dma/at_xdmac.c
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@@ -865,7 +865,7 @@ at_xdmac_interleaved_queue_desc(struct d
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* match the one of another channel. If not, it could lead to spurious
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* flag status.
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*/
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- u32 chan_cc = AT_XDMAC_CC_PERID(0x3f)
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+ u32 chan_cc = AT_XDMAC_CC_PERID(0x7f)
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| AT_XDMAC_CC_DIF(0)
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| AT_XDMAC_CC_SIF(0)
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| AT_XDMAC_CC_MBSIZE_SIXTEEN
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@@ -1047,7 +1047,7 @@ at_xdmac_prep_dma_memcpy(struct dma_chan
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* match the one of another channel. If not, it could lead to spurious
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* flag status.
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*/
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- u32 chan_cc = AT_XDMAC_CC_PERID(0x3f)
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+ u32 chan_cc = AT_XDMAC_CC_PERID(0x7f)
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| AT_XDMAC_CC_DAM_INCREMENTED_AM
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| AT_XDMAC_CC_SAM_INCREMENTED_AM
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| AT_XDMAC_CC_DIF(0)
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@@ -1153,7 +1153,7 @@ static struct at_xdmac_desc *at_xdmac_me
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* match the one of another channel. If not, it could lead to spurious
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* flag status.
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*/
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- u32 chan_cc = AT_XDMAC_CC_PERID(0x3f)
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+ u32 chan_cc = AT_XDMAC_CC_PERID(0x7f)
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| AT_XDMAC_CC_DAM_UBS_AM
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| AT_XDMAC_CC_SAM_INCREMENTED_AM
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| AT_XDMAC_CC_DIF(0)
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