diff options
Diffstat (limited to 'target/linux/at91/patches-5.10/132-dmaengine-at_xdmac-adapt-perid-for-mem2mem-operation.patch')
| -rw-r--r-- | target/linux/at91/patches-5.10/132-dmaengine-at_xdmac-adapt-perid-for-mem2mem-operation.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/target/linux/at91/patches-5.10/132-dmaengine-at_xdmac-adapt-perid-for-mem2mem-operation.patch b/target/linux/at91/patches-5.10/132-dmaengine-at_xdmac-adapt-perid-for-mem2mem-operation.patch new file mode 100644 index 0000000000..27c95082e3 --- /dev/null +++ b/target/linux/at91/patches-5.10/132-dmaengine-at_xdmac-adapt-perid-for-mem2mem-operation.patch @@ -0,0 +1,55 @@ +From 1dccaa4c1e99cd8bd27684a2c87ec806d426c088 Mon Sep 17 00:00:00 2001 +From: Eugen Hristev <eugen.hristev@microchip.com> +Date: Fri, 16 Oct 2020 12:37:25 +0300 +Subject: [PATCH 132/247] 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: Eugen Hristev <eugen.hristev@microchip.com> +Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com> +Link: https://lore.kernel.org/r/20201016093725.289880-1-eugen.hristev@microchip.com +Signed-off-by: Vinod Koul <vkoul@kernel.org> +--- + drivers/dma/at_xdmac.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c +index 90afba0b36fe..85fe260ccd07 100644 +--- a/drivers/dma/at_xdmac.c ++++ b/drivers/dma/at_xdmac.c +@@ -865,7 +865,7 @@ 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 +@@ -1047,7 +1047,7 @@ 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) +@@ -1153,7 +1153,7 @@ 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) +-- +2.32.0 + |