patches/0925-ASoC-rsnd-indicate-IRQ-error-status-for-debug.patch

From 1c0d545fd8308c1ba27e0f99d9ef4131b8319f1b Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Tue, 13 Feb 2018 02:08:53 +0000
Subject: [PATCH 0925/1795] ASoC: rsnd: indicate IRQ error status for debug

SSI/SRC have under/over flow error handling, and its status is useful
for debuging. But sometimes it might be too much message,
and it might blocks necessity other information.

To avoid such situation, basically this patch indicates interrupt
status debug message if DEBUG was defined, but it will be suppressed
if RSND_DEBUG_NO_IRQ_STATUS was defined.

Reported-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit 2b62786951ca38cc9fd0bd9273de0aae1b45134d)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 sound/soc/sh/rcar/rsnd.h | 10 ++++++++++
 sound/soc/sh/rcar/src.c  | 22 ++++++++++++++++++++--
 sound/soc/sh/rcar/ssi.c  | 16 +++++++++++++++-
 3 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h
index ad6523595b0a..5241ea7cf153 100644
--- a/sound/soc/sh/rcar/rsnd.h
+++ b/sound/soc/sh/rcar/rsnd.h
@@ -788,4 +788,14 @@ void rsnd_mod_make_sure(struct rsnd_mod *mod, enum rsnd_mod_type type);
 #define rsnd_mod_confirm_dvc(mdvc)
 #endif
 
+/*
+ * If you don't need interrupt status debug message,
+ * define RSND_DEBUG_NO_IRQ_STATUS as 1 on top of src.c/ssi.c
+ *
+ * #define RSND_DEBUG_NO_IRQ_STATUS 1
+ */
+#define rsnd_dbg_irq_status(dev, param...)		\
+	if (!IS_BUILTIN(RSND_DEBUG_NO_IRQ_STATUS))	\
+		dev_dbg(dev, param)
+
 #endif
diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c
index 510b68a483b4..a727e71587b6 100644
--- a/sound/soc/sh/rcar/src.c
+++ b/sound/soc/sh/rcar/src.c
@@ -8,6 +8,15 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+
+/*
+ * you can enable below define if you don't need
+ * SSI interrupt status debug message when debugging
+ * see rsnd_dbg_irq_status()
+ *
+ * #define RSND_DEBUG_NO_IRQ_STATUS 1
+ */
+
 #include "rsnd.h"
 
 #define SRC_NAME "src"
@@ -325,7 +334,10 @@ static void rsnd_src_status_clear(struct rsnd_mod *mod)
 
 static bool rsnd_src_error_occurred(struct rsnd_mod *mod)
 {
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
 	u32 val0, val1;
+	u32 status0, status1;
 	bool ret = false;
 
 	val0 = val1 = OUF_SRC(rsnd_mod_id(mod));
@@ -338,9 +350,15 @@ static bool rsnd_src_error_occurred(struct rsnd_mod *mod)
 	if (rsnd_src_sync_is_enabled(mod))
 		val0 = val0 & 0xffff;
 
-	if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val0) ||
-	    (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val1))
+	status0 = rsnd_mod_read(mod, SCU_SYS_STATUS0);
+	status1 = rsnd_mod_read(mod, SCU_SYS_STATUS1);
+	if ((status0 & val0) || (status1 & val1)) {
+		rsnd_dbg_irq_status(dev, "%s[%d] err status : 0x%08x, 0x%08x\n",
+			rsnd_mod_name(mod), rsnd_mod_id(mod),
+			status0, status1);
+
 		ret = true;
+	}
 
 	return ret;
 }
diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index 97a9db892a8f..333b802681ad 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -11,6 +11,15 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+
+/*
+ * you can enable below define if you don't need
+ * SSI interrupt status debug message when debugging
+ * see rsnd_dbg_irq_status()
+ *
+ * #define RSND_DEBUG_NO_IRQ_STATUS 1
+ */
+
 #include <sound/simple_card_utils.h>
 #include <linux/delay.h>
 #include "rsnd.h"
@@ -603,6 +612,7 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
 				 struct rsnd_dai_stream *io)
 {
 	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
 	int is_dma = rsnd_ssi_is_dma_mode(mod);
 	u32 status;
 	bool elapsed = false;
@@ -621,8 +631,12 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
 		elapsed = rsnd_ssi_pio_interrupt(mod, io);
 
 	/* DMA only */
-	if (is_dma && (status & (UIRQ | OIRQ)))
+	if (is_dma && (status & (UIRQ | OIRQ))) {
+		rsnd_dbg_irq_status(dev, "%s[%d] err status : 0x%08x\n",
+			rsnd_mod_name(mod), rsnd_mod_id(mod), status);
+
 		stop = true;
+	}
 
 	rsnd_ssi_status_clear(mod);
 rsnd_ssi_interrupt_out:
-- 
2.19.0