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drivers: dma: dma_nxp_edma: allow channel re-configuration

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Currently, the state transition function doesn't allow
the re-configuration of an already configured channel
(i.e: CHAN_CONFIGURED -> CHAN_CONFIGURED transition). This
causes problems when using `pulseaudio` and `SOF` because
the same channel ends up being configured multiple times
in the beginning due to how pulse seems to work. Logically
speaking, re-configuring an already configured channel is
not wrong so this commit solves the issue by allowing
the CHAN_CONFIGURED -> CHAN_CONFIGURED transition.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
This commit is contained in:
Laurentiu Mihalcea 2024-02-08 17:26:06 +02:00 committed by Henrik Brix Andersen
parent 894503c758
commit 705d579685
1 changed files with 2 additions and 1 deletions
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3
drivers/dma/dma_nxp_edma.h
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@ -241,7 +241,8 @@ static inline int channel_change_state(struct edma_channel *chan,
}
break;
case CHAN_STATE_CONFIGURED:
if (next != CHAN_STATE_STARTED) {
if (next != CHAN_STATE_STARTED &&
next != CHAN_STATE_CONFIGURED) {
return -EPERM;
}
break;