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Subject[PATCH] dmaengine: ti: omap-dma: Configure LCH_TYPE for OMAP1
Date
When the channel is configured for slave operation the LCH_TYPE needs to be
set to LCh-P. For memcpy channels the LCH_TYPE must be set to LCh-2D.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
drivers/dma/ti/omap-dma.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/dma/ti/omap-dma.c b/drivers/dma/ti/omap-dma.c
index a4a931ddf6f6..a18cfd497f04 100644
--- a/drivers/dma/ti/omap-dma.c
+++ b/drivers/dma/ti/omap-dma.c
@@ -185,6 +185,10 @@ enum {

CLNK_CTRL_ENABLE_LNK = BIT(15),

+ /* OMAP1 only */
+ LCH_CTRL_LCH_2D = 0,
+ LCH_CTRL_LCH_P = 2,
+
CDP_DST_VALID_INC = 0 << 0,
CDP_DST_VALID_RELOAD = 1 << 0,
CDP_DST_VALID_REUSE = 2 << 0,
@@ -529,6 +533,7 @@ static void omap_dma_start_sg(struct omap_chan *c, struct omap_desc *d)

static void omap_dma_start_desc(struct omap_chan *c)
{
+ struct omap_dmadev *od = to_omap_dma_dev(c->vc.chan.device);
struct virt_dma_desc *vd = vchan_next_desc(&c->vc);
struct omap_desc *d;
unsigned cxsa, cxei, cxfi;
@@ -570,6 +575,12 @@ static void omap_dma_start_desc(struct omap_chan *c)
omap_dma_chan_write(c, CSDP, d->csdp);
omap_dma_chan_write(c, CLNK_CTRL, d->clnk_ctrl);

+ if (dma_omap1() && !__dma_omap15xx(od->plat->dma_attr)) {
+ if (is_slave_direction(d->dir))
+ omap_dma_chan_write(c, LCH_CTRL, LCH_CTRL_LCH_P);
+ else
+ omap_dma_chan_write(c, LCH_CTRL, LCH_CTRL_LCH_2D);
+ }
omap_dma_start_sg(c, d);
}

--
Peter
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

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