[PATCH 0/3] ASoC: sh: rz-ssi: Trivial changes

[PATCH 0/3] ASoC: sh: rz-ssi: Trivial changes

[Lad Prabhakar]

Hi All,

This patch series has trivial changes for rz-ssi driver. Patches 1
(partial) & 2 are from series [3].

patch 1/3 is just a cosmetic change which was part of patch [0] where it
uses a do-while instead of while-do. Patch 2/3 is from series [1] where a
helper function is added and patch 3/3 is a new patch which removes
duplicate macros.

All the patches apply to [2] (sound -next)

[0] https://patchwork.kernel.org/project/alsa-devel/patch/
20220115012303.29651-2-prabhakar.mahadev-lad.rj@bp.renesas.com/
[1] https://patchwork.kernel.org/project/alsa-devel/patch/
20220115012303.29651-6-prabhakar.mahadev-lad.rj@bp.renesas.com/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git/log/
[3] https://patchwork.kernel.org/project/alsa-devel/list/?series=605672

Cheers,
Prabhakar

Lad Prabhakar (3):
  ASoC: sh: rz-ssi: Use a do-while loop in rz_ssi_pio_recv()
  ASoC: sh: rz-ssi: Add rz_ssi_set_substream() helper function
  ASoC: sh: rz-ssi: Remove duplicate macros

 sound/soc/sh/rz-ssi.c | 31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

-- 
2.17.1

[PATCH 1/3] ASoC: sh: rz-ssi: Use a do-while loop in rz_ssi_pio_recv()

[Lad Prabhakar]

Use a do-while loop while reading the samples from RX FIFO. The "done"
flag was only changed as an outcome of the last if-statement (last step)
in this entire procedure. This patch moves the condition from if
statement to while and drops the "done" variable for readability.

While at it, also drop the unneeded parentheses around runtime->dma_area.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
Hi All,

This change was part of patch [0], as v1 series was applied I am just
sending the cosmetic changes from v2 for readability.

[0] https://patchwork.kernel.org/project/alsa-devel/patch/
20220115012303.29651-6-prabhakar.mahadev-lad.rj@bp.renesas.com/

Cheers,
Prabhakar
---
 sound/soc/sh/rz-ssi.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/sound/soc/sh/rz-ssi.c b/sound/soc/sh/rz-ssi.c
index 81e1786b827d..2c8775d37f50 100644
--- a/sound/soc/sh/rz-ssi.c
+++ b/sound/soc/sh/rz-ssi.c
@@ -408,7 +408,6 @@ static int rz_ssi_pio_recv(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm)
 {
 	struct snd_pcm_substream *substream = strm->substream;
 	struct snd_pcm_runtime *runtime;
-	bool done = false;
 	u16 *buf;
 	int fifo_samples;
 	int frames_left;
@@ -420,7 +419,7 @@ static int rz_ssi_pio_recv(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm)
 
 	runtime = substream->runtime;
 
-	while (!done) {
+	do {
 		/* frames left in this period */
 		frames_left = runtime->period_size -
 			      (strm->buffer_pos % runtime->period_size);
@@ -444,7 +443,7 @@ static int rz_ssi_pio_recv(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm)
 			break;
 
 		/* calculate new buffer index */
-		buf = (u16 *)(runtime->dma_area);
+		buf = (u16 *)runtime->dma_area;
 		buf += strm->buffer_pos * runtime->channels;
 
 		/* Note, only supports 16-bit samples */
@@ -453,11 +452,7 @@ static int rz_ssi_pio_recv(struct rz_ssi_priv *ssi, struct rz_ssi_stream *strm)
 
 		rz_ssi_reg_mask_setl(ssi, SSIFSR, SSIFSR_RDF, 0);
 		rz_ssi_pointer_update(strm, samples / runtime->channels);
-
-		/* check if there are no more samples in the RX FIFO */
-		if (!(!frames_left && fifo_samples >= runtime->channels))
-			done = true;
-	}
+	} while (!frames_left && fifo_samples >= runtime->channels);
 
 	return 0;
 }
-- 
2.17.1

[PATCH 2/3] ASoC: sh: rz-ssi: Add rz_ssi_set_substream() helper function

[Lad Prabhakar]

A copy of substream pointer is stored in priv structure during
rz_ssi_dai_trigger() callback ie in SNDRV_PCM_TRIGGER_START case
and the pointer is assigned to NULL in case of SNDRV_PCM_TRIGGER_STOP.

The driver used the locks only in rz_ssi_stream_is_valid() and assigned
the local substream pointer to NULL in rz_ssi_dai_trigger() callback but
never locked it while making a local copy.

This patch adds the rz_ssi_set_substream() helper function to set the
substream pointer with locks acquired and replaces the instances of
setting the local substream pointer with the rz_ssi_set_substream()
function.

Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
---
 sound/soc/sh/rz-ssi.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/sound/soc/sh/rz-ssi.c b/sound/soc/sh/rz-ssi.c
index 2c8775d37f50..1a46c9f3c4e5 100644
--- a/sound/soc/sh/rz-ssi.c
+++ b/sound/soc/sh/rz-ssi.c
@@ -188,6 +188,17 @@ static inline bool rz_ssi_is_dma_enabled(struct rz_ssi_priv *ssi)
 	return (ssi->playback.dma_ch && (ssi->dma_rt || ssi->capture.dma_ch));
 }
 
+static void rz_ssi_set_substream(struct rz_ssi_stream *strm,
+				 struct snd_pcm_substream *substream)
+{
+	struct rz_ssi_priv *ssi = strm->priv;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ssi->lock, flags);
+	strm->substream = substream;
+	spin_unlock_irqrestore(&ssi->lock, flags);
+}
+
 static bool rz_ssi_stream_is_valid(struct rz_ssi_priv *ssi,
 				   struct rz_ssi_stream *strm)
 {
@@ -206,7 +217,7 @@ static void rz_ssi_stream_init(struct rz_ssi_stream *strm,
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 
-	strm->substream = substream;
+	rz_ssi_set_substream(strm, substream);
 	strm->sample_width = samples_to_bytes(runtime, 1);
 	strm->dma_buffer_pos = 0;
 	strm->period_counter = 0;
@@ -224,11 +235,8 @@ static void rz_ssi_stream_quit(struct rz_ssi_priv *ssi,
 			       struct rz_ssi_stream *strm)
 {
 	struct snd_soc_dai *dai = rz_ssi_get_dai(strm->substream);
-	unsigned long flags;
 
-	spin_lock_irqsave(&ssi->lock, flags);
-	strm->substream = NULL;
-	spin_unlock_irqrestore(&ssi->lock, flags);
+	rz_ssi_set_substream(strm, NULL);
 
 	if (strm->oerr_num > 0)
 		dev_info(dai->dev, "overrun = %d\n", strm->oerr_num);
-- 
2.17.1

[PATCH 3/3] ASoC: sh: rz-ssi: Remove duplicate macros

[Lad Prabhakar]

Remove SSICR_MST and SSICR_CKDV macros which are defined more than once.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 sound/soc/sh/rz-ssi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/sound/soc/sh/rz-ssi.c b/sound/soc/sh/rz-ssi.c
index 1a46c9f3c4e5..e8edaed05d4c 100644
--- a/sound/soc/sh/rz-ssi.c
+++ b/sound/soc/sh/rz-ssi.c
@@ -28,8 +28,6 @@
 /* SSI REGISTER BITS */
 #define SSICR_DWL(x)		(((x) & 0x7) << 19)
 #define SSICR_SWL(x)		(((x) & 0x7) << 16)
-#define SSICR_MST		BIT(14)
-#define SSICR_CKDV(x)		(((x) & 0xf) << 4)
 
 #define SSICR_CKS		BIT(30)
 #define SSICR_TUIEN		BIT(29)
-- 
2.17.1

RE: [PATCH 3/3] ASoC: sh: rz-ssi: Remove duplicate macros

[Biju Das]

Hi Prabhakar,

Thanks for the patch

> -----Original Message-----
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Sent: 25 January 2022 13:25
> To: Mark Brown <broonie@kernel.org>; Liam Girdwood <lgirdwood@gmail.com>;
> Jaroslav Kysela <perex@perex.cz>; Takashi Iwai <tiwai@suse.com>; alsa-
> devel@alsa-project.org; Pavel Machek <pavel@denx.de>
> Cc: linux-kernel@vger.kernel.org; linux-renesas-soc@vger.kernel.org; Biju
> Das <biju.das.jz@bp.renesas.com>; Prabhakar <prabhakar.csengg@gmail.com>;
> Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Subject: [PATCH 3/3] ASoC: sh: rz-ssi: Remove duplicate macros
> 
> Remove SSICR_MST and SSICR_CKDV macros which are defined more than once.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>

Cheers,
Biju

> ---
>  sound/soc/sh/rz-ssi.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/sound/soc/sh/rz-ssi.c b/sound/soc/sh/rz-ssi.c index
> 1a46c9f3c4e5..e8edaed05d4c 100644
> --- a/sound/soc/sh/rz-ssi.c
> +++ b/sound/soc/sh/rz-ssi.c
> @@ -28,8 +28,6 @@
>  /* SSI REGISTER BITS */
>  #define SSICR_DWL(x)		(((x) & 0x7) << 19)
>  #define SSICR_SWL(x)		(((x) & 0x7) << 16)
> -#define SSICR_MST		BIT(14)
> -#define SSICR_CKDV(x)		(((x) & 0xf) << 4)
> 
>  #define SSICR_CKS		BIT(30)
>  #define SSICR_TUIEN		BIT(29)
> --
> 2.17.1

Re: [PATCH 0/3] ASoC: sh: rz-ssi: Trivial changes

[Mark Brown]

On Tue, 25 Jan 2022 13:24:54 +0000, Lad Prabhakar wrote:
> This patch series has trivial changes for rz-ssi driver. Patches 1
> (partial) & 2 are from series [3].
> 
> patch 1/3 is just a cosmetic change which was part of patch [0] where it
> uses a do-while instead of while-do. Patch 2/3 is from series [1] where a
> helper function is added and patch 3/3 is a new patch which removes
> duplicate macros.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/3] ASoC: sh: rz-ssi: Use a do-while loop in rz_ssi_pio_recv()
      commit: 7276d3f329c633340f3c539ce35ed254d2fe467b
[2/3] ASoC: sh: rz-ssi: Add rz_ssi_set_substream() helper function
      commit: 962ff7ecb60b684fe15b135ccbe07628b8bb522a
[3/3] ASoC: sh: rz-ssi: Remove duplicate macros
      commit: acfa1e2c2ff5cd7fb7948b0c5c2057acd9dceb14

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark