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ASoC: rsnd: call request_irq/free_irq once in MIX case

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Each module's dai callback function availability is controlled
by mod->status. For example "always called", "call once".
In .probe/.remove case, it needs to be called always, because
.probe will call xxx_attach() function on .probe, especially
if platform is using MIXer.
For example, below case, MIX0/DVC0/SSI0 needs to be called twice.

        playback = <&src0 &ctu02 &mix0 &dvc0 &ssi0>;
        playback = <&src2 &ctu03 &mix0 &dvc0 &ssi0>;

But in this case, SSI0 will call request_irq() twice.
This patch add new RSND_SSI_PROBED flag and control it

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto 2017-08-10 00:07:38 +00:00 committed by Mark Brown
parent bf9b29c784
commit b6e58fcacb
1 changed files with 22 additions and 5 deletions
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27
sound/soc/sh/rcar/ssi.c
View file

@ -90,6 +90,7 @@ struct rsnd_ssi {
#define RSND_SSI_NO_BUSIF (1 << 1) /* SSI+DMA without BUSIF */
#define RSND_SSI_HDMI0 (1 << 2) /* for HDMI0 */
#define RSND_SSI_HDMI1 (1 << 3) /* for HDMI1 */
#define RSND_SSI_PROBED (1 << 4)
#define for_each_rsnd_ssi(pos, priv, i) \
for (i = 0; \
@ -103,6 +104,7 @@ struct rsnd_ssi {
#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
#define rsnd_ssi_flags_has(p, f) ((p)->flags & f)
#define rsnd_ssi_flags_set(p, f) ((p)->flags |= f)
#define rsnd_ssi_flags_del(p, f) ((p)->flags = ((p)->flags & ~f))
#define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io))
#define rsnd_ssi_is_multi_slave(mod, io) \
(rsnd_ssi_multi_slaves(io) & (1 << rsnd_mod_id(mod)))
@ -784,11 +786,22 @@ static int rsnd_ssi_common_probe(struct rsnd_mod *mod,
/*
* SSI might be called again as PIO fallback
* It is easy to manual handling for IRQ request/free
*
* OTOH, this function might be called many times if platform is
* using MIX. It needs xxx_attach() many times on xxx_probe().
* Because of it, we can't control .probe/.remove calling count by
* mod->status.
* But it don't need to call request_irq() many times.
* Let's control it by RSND_SSI_PROBED flag.
*/
ret = request_irq(ssi->irq,
rsnd_ssi_interrupt,
IRQF_SHARED,
dev_name(dev), mod);
if (!rsnd_ssi_flags_has(ssi, RSND_SSI_PROBED)) {
ret = request_irq(ssi->irq,
rsnd_ssi_interrupt,
IRQF_SHARED,
dev_name(dev), mod);
rsnd_ssi_flags_set(ssi, RSND_SSI_PROBED);
}
return ret;
}
@ -805,7 +818,11 @@ static int rsnd_ssi_common_remove(struct rsnd_mod *mod,
return 0;
/* PIO will request IRQ again */
free_irq(ssi->irq, mod);
if (rsnd_ssi_flags_has(ssi, RSND_SSI_PROBED)) {
free_irq(ssi->irq, mod);
rsnd_ssi_flags_del(ssi, RSND_SSI_PROBED);
}
return 0;
}