From: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
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...@renesas.com>
---
sound/soc/sh/rcar/ssi.c | 27 ++++++++++++++++++++++-----
1 file changed, 22 insertions(+), 5 deletions(-)
diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index ca9355b..8bb4714 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -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;
}
--
1.9.1
