The new DMA descriptor auto-loading feature (referred to
as sglist in the code) uses new registers. Ensure they
are cleared.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
CC: Venkatraman S <svenkatr@xxxxxx>
CC: Madhusudhan C <madhu.cr@xxxxxx>
CC: Shilimkar Santosh <santosh.shilimkar@xxxxxx>
CC: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm/plat-omap/dma.c | 11 ++++++-----
1 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 32a923a..a8264a0 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -1914,13 +1914,14 @@ void omap_clear_dma_sglist_mode(int lch)
{
/* Clear entire CDP which is related to sglist handling */
p->dma_write(0, CDP, lch);
+ p->dma_write(0, CNDP, lch);
p->dma_write(0, CCDN, lch);
- /**
- * Put back the original enabled irqs, which
- * could have been overwritten by type 1 or type 2
- * descriptors
+ /*
+ * CICR could have been overwritten by type 1 or type 2
+ * descriptors. It is set up in omap_start_dma() anyway
+ * so just clear it to be on the safe side.
*/
- p->dma_write(dma_chan[lch].enabled_irqs, CICR, lch);
+ p->dma_write(0, CICR, lch);
return;
}
EXPORT_SYMBOL(omap_clear_dma_sglist_mode);
--
1.7.0.4
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