at91: add kernel support for sama7g5 soc

[openwrt/staging/mkresin.git] / target / linux / at91 / patches-5.10 / 132-dmaengine-at_xdmac-adapt-perid-for-mem2mem-operation.patch

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 (file)
index 0000000..27c9508
--- /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
+