Commit be8cb7df authored by Jonas Aaberg's avatar Jonas Aaberg Committed by Dan Williams
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DMAENGINE: ste_dma40: Fix failed to restart logical channel bug 



A transfer that runs in the different direction on the same
channel will now be resumed when the other is suspend/stopped.

Signed-off-by: default avatarJonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 0747c7ba

drivers/dma/ste_dma40.c

+8 −12
Original line number Diff line number Diff line
@@ -640,17 +640,13 @@ static void d40_config_set_event(struct d40_chan *d40c, bool do_enable) 


static u32 d40_chan_has_events(struct d40_chan *d40c)

{

	u32 val = 0;

	u32 val;



	/* If SSLNK or SDLNK is zero all events are disabled */

	if ((d40c->dma_cfg.dir ==  STEDMA40_PERIPH_TO_MEM) ||

	    (d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_PERIPH))

	val = readl(d40c->base->virtbase + D40_DREG_PCBASE +

		    d40c->phy_chan->num * D40_DREG_PCDELTA +

		    D40_CHAN_REG_SSLNK);



	if (d40c->dma_cfg.dir !=  STEDMA40_PERIPH_TO_MEM)

		val = readl(d40c->base->virtbase + D40_DREG_PCBASE +

	val |= readl(d40c->base->virtbase + D40_DREG_PCBASE +

		     d40c->phy_chan->num * D40_DREG_PCDELTA +

		     D40_CHAN_REG_SDLNK);

	return val;