Re: [PATCH v3 09/13] dmaengine: tegra-apb: Remove runtime PM usage

[Jon Hunter]

On 06/01/2020 01:17, Dmitry Osipenko wrote:
> There is no benefit from runtime PM usage for the APB DMA driver because
> it enables clock at the time of channel's allocation and thus clock stays
> enabled all the time in practice, secondly there is benefit from manually
> disabled clock because hardware auto-gates it during idle by itself.

This assumes that the channel is allocated during a driver
initialisation. That may not always be the case. I believe audio is one
case where channels are requested at the start of audio playback.

Jon

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