From: Nicolin Chen <nicoleotsuka@gmail.com> To: broonie@kernel.org, timur@tabi.org Cc: caleb@crome.org, mail@maciej.szmigiero.name, fabio.estevam@nxp.com, alsa-devel@alsa-project.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, lgirdwood@gmail.com, arnaud.mouiche@invoxia.com, lukma@denx.de, kernel@pengutronix.de Subject: [PATCH v6 06/17] ASoC: fsl_ssi: Clear FIFO directly in fsl_ssi_config() Date: Mon, 12 Feb 2018 14:03:14 -0800 [thread overview] Message-ID: <1518473005-14090-7-git-send-email-nicoleotsuka@gmail.com> (raw) In-Reply-To: <1518473005-14090-1-git-send-email-nicoleotsuka@gmail.com> The FIFO clear helper function is just one line of code now. So it could be cleaned up by removing it and calling regmap directly. Meanwhile, FIFO clear could be applied to all use cases, not confined to AC97. So this patch also moves FIFO clear in the trigger() to fsl_ssi_config() and removes the AC97 check. Note that SOR register is safe from offline_config HW limit. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> Tested-by: Caleb Crome <caleb@crome.org> Tested-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Reviewed-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> --- sound/soc/fsl/fsl_ssi.c | 33 ++++++++++----------------------- 1 file changed, 10 insertions(+), 23 deletions(-) diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 0d8c800..d276b78 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -410,17 +410,6 @@ static void fsl_ssi_rxtx_config(struct fsl_ssi *ssi, bool enable) } /** - * Clear remaining data in the FIFO to avoid dirty data or channel slipping - */ -static void fsl_ssi_fifo_clear(struct fsl_ssi *ssi, bool is_rx) -{ - bool tx = !is_rx; - - regmap_update_bits(ssi->regs, REG_SSI_SOR, - SSI_SOR_xX_CLR(tx), SSI_SOR_xX_CLR(tx)); -} - -/** * Exclude bits that are used by the opposite stream * * When both streams are active, disabling some bits for the current stream @@ -446,10 +435,11 @@ static void fsl_ssi_fifo_clear(struct fsl_ssi *ssi, bool is_rx) static void fsl_ssi_config(struct fsl_ssi *ssi, bool enable, struct fsl_ssi_regvals *vals) { - int adir = (&ssi->regvals[TX] == vals) ? RX : TX; - int dir = (&ssi->regvals[TX] == vals) ? TX : RX; + bool tx = &ssi->regvals[TX] == vals; struct regmap *regs = ssi->regs; struct fsl_ssi_regvals *avals; + int adir = tx ? RX : TX; + int dir = tx ? TX : RX; bool aactive; /* Check if the opposite stream is active */ @@ -489,7 +479,9 @@ static void fsl_ssi_config(struct fsl_ssi *ssi, bool enable, /* Online configure single direction while SSI is running */ if (enable) { - fsl_ssi_fifo_clear(ssi, vals->scr & SSI_SCR_RE); + /* Clear FIFO to prevent dirty data or channel slipping */ + regmap_update_bits(ssi->regs, REG_SSI_SOR, + SSI_SOR_xX_CLR(tx), SSI_SOR_xX_CLR(tx)); regmap_update_bits(regs, REG_SSI_SRCR, vals->srcr, vals->srcr); regmap_update_bits(regs, REG_SSI_STCR, vals->stcr, vals->stcr); @@ -511,6 +503,10 @@ static void fsl_ssi_config(struct fsl_ssi *ssi, bool enable, regmap_update_bits(regs, REG_SSI_SRCR, srcr, 0); regmap_update_bits(regs, REG_SSI_STCR, stcr, 0); regmap_update_bits(regs, REG_SSI_SIER, sier, 0); + + /* Clear FIFO to prevent dirty data or channel slipping */ + regmap_update_bits(ssi->regs, REG_SSI_SOR, + SSI_SOR_xX_CLR(tx), SSI_SOR_xX_CLR(tx)); } config_done: @@ -1091,7 +1087,6 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(rtd->cpu_dai); - struct regmap *regs = ssi->regs; switch (cmd) { case SNDRV_PCM_TRIGGER_START: @@ -1116,14 +1111,6 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, return -EINVAL; } - /* Clear corresponding FIFO */ - if (fsl_ssi_is_ac97(ssi)) { - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - regmap_write(regs, REG_SSI_SOR, SSI_SOR_TX_CLR); - else - regmap_write(regs, REG_SSI_SOR, SSI_SOR_RX_CLR); - } - return 0; } -- 2.1.4
WARNING: multiple messages have this Message-ID (diff)
From: Nicolin Chen <nicoleotsuka@gmail.com> To: broonie@kernel.org, timur@tabi.org Cc: mail@maciej.szmigiero.name, kernel@pengutronix.de, lgirdwood@gmail.com, alsa-devel@alsa-project.org, caleb@crome.org, linux-kernel@vger.kernel.org, arnaud.mouiche@invoxia.com, lukma@denx.de, fabio.estevam@nxp.com, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v6 06/17] ASoC: fsl_ssi: Clear FIFO directly in fsl_ssi_config() Date: Mon, 12 Feb 2018 14:03:14 -0800 [thread overview] Message-ID: <1518473005-14090-7-git-send-email-nicoleotsuka@gmail.com> (raw) In-Reply-To: <1518473005-14090-1-git-send-email-nicoleotsuka@gmail.com> The FIFO clear helper function is just one line of code now. So it could be cleaned up by removing it and calling regmap directly. Meanwhile, FIFO clear could be applied to all use cases, not confined to AC97. So this patch also moves FIFO clear in the trigger() to fsl_ssi_config() and removes the AC97 check. Note that SOR register is safe from offline_config HW limit. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> Tested-by: Caleb Crome <caleb@crome.org> Tested-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Reviewed-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> --- sound/soc/fsl/fsl_ssi.c | 33 ++++++++++----------------------- 1 file changed, 10 insertions(+), 23 deletions(-) diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 0d8c800..d276b78 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -410,17 +410,6 @@ static void fsl_ssi_rxtx_config(struct fsl_ssi *ssi, bool enable) } /** - * Clear remaining data in the FIFO to avoid dirty data or channel slipping - */ -static void fsl_ssi_fifo_clear(struct fsl_ssi *ssi, bool is_rx) -{ - bool tx = !is_rx; - - regmap_update_bits(ssi->regs, REG_SSI_SOR, - SSI_SOR_xX_CLR(tx), SSI_SOR_xX_CLR(tx)); -} - -/** * Exclude bits that are used by the opposite stream * * When both streams are active, disabling some bits for the current stream @@ -446,10 +435,11 @@ static void fsl_ssi_fifo_clear(struct fsl_ssi *ssi, bool is_rx) static void fsl_ssi_config(struct fsl_ssi *ssi, bool enable, struct fsl_ssi_regvals *vals) { - int adir = (&ssi->regvals[TX] == vals) ? RX : TX; - int dir = (&ssi->regvals[TX] == vals) ? TX : RX; + bool tx = &ssi->regvals[TX] == vals; struct regmap *regs = ssi->regs; struct fsl_ssi_regvals *avals; + int adir = tx ? RX : TX; + int dir = tx ? TX : RX; bool aactive; /* Check if the opposite stream is active */ @@ -489,7 +479,9 @@ static void fsl_ssi_config(struct fsl_ssi *ssi, bool enable, /* Online configure single direction while SSI is running */ if (enable) { - fsl_ssi_fifo_clear(ssi, vals->scr & SSI_SCR_RE); + /* Clear FIFO to prevent dirty data or channel slipping */ + regmap_update_bits(ssi->regs, REG_SSI_SOR, + SSI_SOR_xX_CLR(tx), SSI_SOR_xX_CLR(tx)); regmap_update_bits(regs, REG_SSI_SRCR, vals->srcr, vals->srcr); regmap_update_bits(regs, REG_SSI_STCR, vals->stcr, vals->stcr); @@ -511,6 +503,10 @@ static void fsl_ssi_config(struct fsl_ssi *ssi, bool enable, regmap_update_bits(regs, REG_SSI_SRCR, srcr, 0); regmap_update_bits(regs, REG_SSI_STCR, stcr, 0); regmap_update_bits(regs, REG_SSI_SIER, sier, 0); + + /* Clear FIFO to prevent dirty data or channel slipping */ + regmap_update_bits(ssi->regs, REG_SSI_SOR, + SSI_SOR_xX_CLR(tx), SSI_SOR_xX_CLR(tx)); } config_done: @@ -1091,7 +1087,6 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(rtd->cpu_dai); - struct regmap *regs = ssi->regs; switch (cmd) { case SNDRV_PCM_TRIGGER_START: @@ -1116,14 +1111,6 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, return -EINVAL; } - /* Clear corresponding FIFO */ - if (fsl_ssi_is_ac97(ssi)) { - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) - regmap_write(regs, REG_SSI_SOR, SSI_SOR_TX_CLR); - else - regmap_write(regs, REG_SSI_SOR, SSI_SOR_RX_CLR); - } - return 0; } -- 2.1.4
next prev parent reply other threads:[~2018-02-12 22:06 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-02-12 22:03 [PATCH v6 00/17] ASoC: fsl_ssi: Clean up - program flow level Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 01/17] ASoC: fsl_ssi: Redefine RX and TX macros Nicolin Chen 2018-02-12 22:03 ` Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 02/17] ASoC: fsl_ssi: Keep ssi->i2s_net updated Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 03/17] ASoC: fsl_ssi: Clean up set_dai_tdm_slot() Nicolin Chen 2018-02-12 22:03 ` Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 04/17] ASoC: fsl_ssi: Maintain a mask of active streams Nicolin Chen 2018-02-12 22:03 ` Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 05/17] ASoC: fsl_ssi: Rename fsl_ssi_disable_val macro Nicolin Chen 2018-02-12 22:03 ` Nicolin Chen 2018-02-12 22:03 ` Nicolin Chen [this message] 2018-02-12 22:03 ` [PATCH v6 06/17] ASoC: fsl_ssi: Clear FIFO directly in fsl_ssi_config() Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 07/17] ASoC: fsl_ssi: Clean up helper functions of trigger() Nicolin Chen 2018-02-12 22:03 ` Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 08/17] ASoC: fsl_ssi: Add DAIFMT define for AC97 Nicolin Chen 2018-02-12 22:03 ` Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 09/17] ASoC: fsl_ssi: Clean up fsl_ssi_setup_regvals() Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 10/17] ASoC: fsl_ssi: Set xFEN0 and xFEN1 together Nicolin Chen 2018-02-12 22:03 ` Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 11/17] ASoC: fsl_ssi: Use snd_soc_init_dma_data instead Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 12/17] ASoC: fsl_ssi: Move one-time configurations to probe() Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 13/17] ASoC: fsl_ssi: Setup AC97 in fsl_ssi_hw_init() Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 14/17] ASoC: fsl_ssi: Clean up _fsl_ssi_set_dai_fmt() Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 15/17] ASoC: fsl_ssi: Add bool synchronous to mark synchronous mode Nicolin Chen 2018-02-12 22:03 ` [PATCH v6 16/17] ASoC: fsl_ssi: Move DT related code to a separate probe() Nicolin Chen 2018-02-22 13:16 ` Applied "ASoC: fsl_ssi: Move DT related code to a separate probe()" to the asoc tree Mark Brown 2018-02-22 13:16 ` Mark Brown 2018-02-12 22:03 ` [PATCH v6 17/17] ASoC: fsl_ssi: Use ssi->streams instead of reading register Nicolin Chen
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