2019-08-23 23:19:38

by Peter Ujfalusi

[permalink] [raw]
Subject: [PATCH 1/5] dmaengine: ti: edma: Do not reset reserved paRAM slots

Skip resetting paRAM slots marked as reserved as they might be used by
other cores.

Signed-off-by: Peter Ujfalusi <[email protected]>
---
drivers/dma/ti/edma.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
index 54895112ba59..1aae95cc0d4b 100644
--- a/drivers/dma/ti/edma.c
+++ b/drivers/dma/ti/edma.c
@@ -2338,9 +2338,6 @@ static int edma_probe(struct platform_device *pdev)

ecc->default_queue = info->default_queue;

- for (i = 0; i < ecc->num_slots; i++)
- edma_write_slot(ecc, i, &dummy_paramset);
-
if (info->rsv) {
/* Set the reserved slots in inuse list */
rsv_slots = info->rsv->rsv_slots;
@@ -2353,6 +2350,12 @@ static int edma_probe(struct platform_device *pdev)
}
}

+ for (i = 0; i < ecc->num_slots; i++) {
+ /* Reset only unused - not reserved - paRAM slots */
+ if (!test_bit(i, ecc->slot_inuse))
+ edma_write_slot(ecc, i, &dummy_paramset);
+ }
+
/* Clear the xbar mapped channels in unused list */
xbar_chans = info->xbar_chans;
if (xbar_chans) {
--
Peter

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