Commit f8435bef authored by Claudiu Beznea's avatar Claudiu Beznea Committed by Vinod Koul
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dmaengine: at_xdmac: do not enable all cyclic channels 



Do not global enable all the cyclic channels in at_xdmac_resume(). Instead
save the global status in at_xdmac_suspend() and re-enable the cyclic
channel only if it was active before suspend.

Fixes: e1f7c9ee ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver")
Signed-off-by: default avatarClaudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230214151827.1050280-6-claudiu.beznea@microchip.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 7c5eb63d

drivers/dma/at_xdmac.c

+4 −1
Original line number Diff line number Diff line
@@ -246,6 +246,7 @@ struct at_xdmac { 
	int			irq;

	struct clk		*clk;

	u32			save_gim;

	u32			save_gs;

	struct dma_pool		*at_xdmac_desc_pool;

	const struct at_xdmac_layout	*layout;

	struct at_xdmac_chan	chan[];
@@ -2162,6 +2163,7 @@ static int __maybe_unused atmel_xdmac_suspend(struct device *dev) 
		}

	}

	atxdmac->save_gim = at_xdmac_read(atxdmac, AT_XDMAC_GIM);

	atxdmac->save_gs = at_xdmac_read(atxdmac, AT_XDMAC_GS);



	at_xdmac_off(atxdmac, false);

	pm_runtime_mark_last_busy(atxdmac->dev);
@@ -2224,6 +2226,7 @@ static int __maybe_unused atmel_xdmac_resume(struct device *dev) 
			at_xdmac_chan_write(atchan, AT_XDMAC_CNDC, atchan->save_cndc);

			at_xdmac_chan_write(atchan, AT_XDMAC_CIE, atchan->save_cim);

			wmb();

			if (atxdmac->save_gs & atchan->mask)

				at_xdmac_write(atxdmac, AT_XDMAC_GE, atchan->mask);

		}

	}