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-rw-r--r--target/linux/apm821xx/patches-4.14/302-dw-dma-hprot-fix-and-equal-priortiy.patch25
1 files changed, 25 insertions, 0 deletions
diff --git a/target/linux/apm821xx/patches-4.14/302-dw-dma-hprot-fix-and-equal-priortiy.patch b/target/linux/apm821xx/patches-4.14/302-dw-dma-hprot-fix-and-equal-priortiy.patch
new file mode 100644
index 0000000000..c6e4331aa9
--- /dev/null
+++ b/target/linux/apm821xx/patches-4.14/302-dw-dma-hprot-fix-and-equal-priortiy.patch
@@ -0,0 +1,25 @@
+--- a/drivers/dma/dw/core.c
++++ b/drivers/dma/dw/core.c
+@@ -167,6 +167,8 @@ static void dwc_initialize_chan_dw(struc
+ cfghi |= DWC_CFGH_DST_PER(dwc->dws.dst_id);
+ cfghi |= DWC_CFGH_SRC_PER(dwc->dws.src_id);
+
++ cfghi |= DWC_CFGH_PROTCTL(3); /* bufferable + privileged access */
++
+ /* Set polarity of handshake interface */
+ cfglo |= hs_polarity ? DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL : 0;
+
+@@ -1293,11 +1295,8 @@ int dw_dma_probe(struct dw_dma_chip *chi
+ else
+ list_add(&dwc->chan.device_node, &dw->dma.channels);
+
+- /* 7 is highest priority & 0 is lowest. */
+- if (pdata->chan_priority == CHAN_PRIORITY_ASCENDING)
+- dwc->priority = pdata->nr_channels - i - 1;
+- else
+- dwc->priority = i;
++ /* set all channels to the same priority */
++ dwc->priority = pdata->nr_channels - 1;
+
+ dwc->ch_regs = &__dw_regs(dw)->CHAN[i];
+ spin_lock_init(&dwc->lock);