diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/806-dma-0020-MLK-22798-1-dmaengine-fsl-edma-v3-do-not-enable-inte.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/806-dma-0020-MLK-22798-1-dmaengine-fsl-edma-v3-do-not-enable-inte.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/806-dma-0020-MLK-22798-1-dmaengine-fsl-edma-v3-do-not-enable-inte.patch b/target/linux/layerscape/patches-5.4/806-dma-0020-MLK-22798-1-dmaengine-fsl-edma-v3-do-not-enable-inte.patch new file mode 100644 index 0000000000..fbfb95e8c9 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/806-dma-0020-MLK-22798-1-dmaengine-fsl-edma-v3-do-not-enable-inte.patch @@ -0,0 +1,42 @@ +From dcb4deb92738a2fd3981550dbf18ae96e22bbe80 Mon Sep 17 00:00:00 2001 +From: Robin Gong <yibin.gong@nxp.com> +Date: Wed, 23 Oct 2019 00:33:42 +0800 +Subject: [PATCH] MLK-22798-1: dmaengine: fsl-edma-v3: do not enable interrupt + in dev_2_dev + +Do not enable interrupt in dev_2_dev with cyclic case, since in such +case no any interrupt needed. Otherwise many interrupt will come in +every 64 words transfered in ASRC case, which cause heavy system +loading. + +Signed-off-by: Robin Gong <yibin.gong@nxp.com> +Reviewed-by: Shengjiu Wang <shengjiu.wang@nxp.com> +(cherry picked from commit f0a3172e1ceb04c46377160486ad7dc6ee022850) +--- + drivers/dma/fsl-edma-v3.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +--- a/drivers/dma/fsl-edma-v3.c ++++ b/drivers/dma/fsl-edma-v3.c +@@ -560,6 +560,7 @@ static struct dma_async_tx_descriptor *f + int sg_len, i; + u32 src_addr, dst_addr, last_sg, nbytes; + u16 soff, doff, iter; ++ bool major_int = true; + + sg_len = buf_len / period_len; + fsl_desc = fsl_edma3_alloc_desc(fsl_chan, sg_len); +@@ -600,11 +601,12 @@ static struct dma_async_tx_descriptor *f + dst_addr = fsl_chan->fsc.dev_addr; + soff = 0; + doff = 0; ++ major_int = false; + } + + fsl_edma3_fill_tcd(fsl_chan, fsl_desc->tcd[i].vtcd, src_addr, + dst_addr, fsl_chan->fsc.attr, soff, nbytes, 0, +- iter, iter, doff, last_sg, true, false, true); ++ iter, iter, doff, last_sg, major_int, false, true); + dma_buf_next += period_len; + } + |