[alsa-devel] [PATCH] ASoC: rsnd: fixup SSI clock during suspend/resume modes

[Kuninori Morimoto]

From: Dmytro Prokopchuk <dmytro.prokopchuk at globallogic.com>

Prepare <-> Cleanup functions pair has balanced calls.
But in case of suspend mode no call to rsnd_soc_dai_shutdown()
function, so cleanup isn't called. OTOH during resume mode
function rsnd_soc_dai_prepare() is called, but calling
rsnd_ssi_prepare() is skipped (rsnd_status_update() returns zero,
bacause was not cleanup before).
We need to call rsnd_ssi_prepare(), because it enables SSI clocks
by calling rsnd_ssi_master_clk_start().

This patch allows to call prepare/cleanup functions always.

Signed-off-by: Dmytro Prokopchuk <dmytro.prokopchuk at globallogic.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx at renesas.com>
[kuninori: adjusted to upstream]
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
 sound/soc/sh/rcar/dma.c  |  7 +++----
 sound/soc/sh/rcar/rsnd.h | 14 +++++++-------
 2 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c
index 0bbc4b0..6d19475 100644
--- a/sound/soc/sh/rcar/dma.c
+++ b/sound/soc/sh/rcar/dma.c
@@ -134,10 +134,9 @@ static int rsnd_dmaen_prepare(struct rsnd_mod *mod,
 	struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
 	struct device *dev = rsnd_priv_to_dev(priv);
 
-	if (dmaen->chan) {
-		dev_err(dev, "it already has dma channel\n");
-		return -EIO;
-	}
+	/* maybe suspended */
+	if (dmaen->chan)
+		return 0;
 
 	/*
 	 * DMAEngine request uses mutex lock.
diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h
index e857311..4464d1d 100644
--- a/sound/soc/sh/rcar/rsnd.h
+++ b/sound/soc/sh/rcar/rsnd.h
@@ -318,9 +318,8 @@ struct rsnd_mod {
 /*
  * status
  *
- * 0xH0000CBA
+ * 0xH0000CB0
  *
- * A	0: prepare	1: cleanup
  * B	0: init		1: quit
  * C	0: start	1: stop
  *
@@ -331,9 +330,8 @@ struct rsnd_mod {
  * H	0: hw_params
  * H	0: pointer
  * H	0: prepare
+ * H	0: cleanup
  */
-#define __rsnd_mod_shift_prepare	0
-#define __rsnd_mod_shift_cleanup	0
 #define __rsnd_mod_shift_init		4
 #define __rsnd_mod_shift_quit		4
 #define __rsnd_mod_shift_start		8
@@ -345,11 +343,13 @@ struct rsnd_mod {
 #define __rsnd_mod_shift_fallback	28 /* always called */
 #define __rsnd_mod_shift_hw_params	28 /* always called */
 #define __rsnd_mod_shift_pointer	28 /* always called */
+#define __rsnd_mod_shift_prepare	28 /* always called */
+#define __rsnd_mod_shift_cleanup	28 /* always called */
 
 #define __rsnd_mod_add_probe		0
 #define __rsnd_mod_add_remove		0
-#define __rsnd_mod_add_prepare		 1
-#define __rsnd_mod_add_cleanup		-1
+#define __rsnd_mod_add_prepare		0
+#define __rsnd_mod_add_cleanup		0
 #define __rsnd_mod_add_init		 1
 #define __rsnd_mod_add_quit		-1
 #define __rsnd_mod_add_start		 1
@@ -363,7 +363,7 @@ struct rsnd_mod {
 #define __rsnd_mod_call_probe		0
 #define __rsnd_mod_call_remove		0
 #define __rsnd_mod_call_prepare		0
-#define __rsnd_mod_call_cleanup		1
+#define __rsnd_mod_call_cleanup		0
 #define __rsnd_mod_call_init		0
 #define __rsnd_mod_call_quit		1
 #define __rsnd_mod_call_start		0
-- 
2.7.4