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ASoC: rsnd: don't fallback to PIO mode when -EPROBE_DEFER 

[ Upstream commit 6c92d5a274 ]

Current rsnd driver will fallback to PIO mode if it can't get DMA
handler. But, DMA might return -EPROBE_DEFER when probe timing.
This driver always fallback to PIO mode especially from
commit ac6bbf0cdf ("iommu: Remove IOMMU_OF_DECLARE") because
of this reason.

The DMA driver will be probed later, but sound driver might be
probed as PIO mode in such case. This patch fixup this issue.
Then, -EPROBE_DEFER is not error. Thus, let's don't indicate error
message in such case.
And it needs to call rsnd_adg_remove() individually if probe failed,
because it registers clk which should be unregister.

Maybe PIO fallback feature itself is not needed,
but let's keep it so far.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Kuninori Morimoto 2018-09-06 03:21:47 +00:00 committed by Greg Kroah-Hartman
parent ad9ad950a3
commit bac5611371
2 changed files with 13 additions and 1 deletions
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10
sound/soc/sh/rcar/core.c
View File

@ -486,7 +486,7 @@ static int rsnd_status_update(u32 *status,
(func_call && (mod)->ops->fn) ? #fn : ""); \
if (func_call && (mod)->ops->fn) \
tmp = (mod)->ops->fn(mod, io, param); \
if (tmp) \
if (tmp && (tmp != -EPROBE_DEFER)) \
dev_err(dev, "%s[%d] : %s error %d\n", \
rsnd_mod_name(mod), rsnd_mod_id(mod), \
#fn, tmp); \
@ -1469,6 +1469,14 @@ exit_snd_probe:
rsnd_dai_call(remove, &rdai->capture, priv);
}
/*
* adg is very special mod which can't use rsnd_dai_call(remove),
* and it registers ADG clock on probe.
* It should be unregister if probe failed.
* Mainly it is assuming -EPROBE_DEFER case
*/
rsnd_adg_remove(priv);
return ret;
}

4
sound/soc/sh/rcar/dma.c
View File

@ -330,6 +330,10 @@ static int rsnd_dmaen_attach(struct rsnd_dai_stream *io,
/* try to get DMAEngine channel */
chan = rsnd_dmaen_request_channel(io, mod_from, mod_to);
if (IS_ERR_OR_NULL(chan)) {
/* Let's follow when -EPROBE_DEFER case */
if (PTR_ERR(chan) == -EPROBE_DEFER)
return PTR_ERR(chan);
/*
* DMA failed. try to PIO mode
* see