From a122a116fc6d8fcf2f202dcd185173a54268f239 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Thu, 8 Apr 2021 13:28:38 +0900 Subject: [PATCH 1/5] ASoC: rsnd: call rsnd_ssi_master_clk_start() from rsnd_ssi_init() Current rsnd needs to call .prepare (P) for clock settings, .trigger for playback start (S) and stop (E). It should be called as below from SSI point of view. P -> S -> E -> P -> S -> E -> ... But, if you used MIXer, below case might happen (2) 1: P -> S ---> E -> ... 2: P ----> S -> ... (1) (3) P(1) setups clock, but E(2) resets it. and starts playback (3). In such case, it will reports "SSI parent/child should use same rate". rsnd_ssi_master_clk_start() which is the main function at (P) was called from rsnd_ssi_init() (= S) before, but was moved by below patch to rsnd_soc_dai_prepare() (= P) to avoid using clk_get_rate() which shouldn't be used under atomic context. commit 4d230d1271064 ("ASoC: rsnd: fixup not to call clk_get/set under non-atomic") Because of above patch, rsnd_ssi_master_clk_start() is now called at (P) which is for non atomic context. But (P) is assuming that spin lock is *not* used. One issue now is rsnd_ssi_master_clk_start() is checking ssi->xxx which should be protected by spin lock. After above patch, adg.c had below patch for other reasons. commit 06e8f5c842f2d ("ASoC: rsnd: don't call clk_get_rate() under atomic context") clk_get_rate() is used at probe() timing by this patch. In other words, rsnd_ssi_master_clk_start() is no longer using clk_get_rate() any more. This means we can call it from rsnd_ssi_init() (= S) again which is protected by spin lock. This patch re-move it to under spin lock, and solves 1. checking ssi->xxx without spin lock issue. 2. clk setting / device start / device stop race condition. Reported-by: Linh Phung T. Y. Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/875z0x1jt5.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/ssi.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c index d071cec25f71..048d53566127 100644 --- a/sound/soc/sh/rcar/ssi.c +++ b/sound/soc/sh/rcar/ssi.c @@ -506,10 +506,15 @@ static int rsnd_ssi_init(struct rsnd_mod *mod, struct rsnd_priv *priv) { struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + int ret; if (!rsnd_ssi_is_run_mods(mod, io)) return 0; + ret = rsnd_ssi_master_clk_start(mod, io); + if (ret < 0) + return ret; + ssi->usrcnt++; rsnd_mod_power_on(mod); @@ -1060,13 +1065,6 @@ static int rsnd_ssi_pio_pointer(struct rsnd_mod *mod, return 0; } -static int rsnd_ssi_prepare(struct rsnd_mod *mod, - struct rsnd_dai_stream *io, - struct rsnd_priv *priv) -{ - return rsnd_ssi_master_clk_start(mod, io); -} - static struct rsnd_mod_ops rsnd_ssi_pio_ops = { .name = SSI_NAME, .probe = rsnd_ssi_common_probe, @@ -1079,7 +1077,6 @@ static struct rsnd_mod_ops rsnd_ssi_pio_ops = { .pointer = rsnd_ssi_pio_pointer, .pcm_new = rsnd_ssi_pcm_new, .hw_params = rsnd_ssi_hw_params, - .prepare = rsnd_ssi_prepare, .get_status = rsnd_ssi_get_status, }; @@ -1166,7 +1163,6 @@ static struct rsnd_mod_ops rsnd_ssi_dma_ops = { .pcm_new = rsnd_ssi_pcm_new, .fallback = rsnd_ssi_fallback, .hw_params = rsnd_ssi_hw_params, - .prepare = rsnd_ssi_prepare, .get_status = rsnd_ssi_get_status, }; From a4856e15e58b54977f1c0c0299309ad4d1f13365 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Thu, 8 Apr 2021 13:28:47 +0900 Subject: [PATCH 2/5] ASoC: rsnd: check all BUSIF status when error commit 66c705d07d784 ("SoC: rsnd: add interrupt support for SSI BUSIF buffer") adds __rsnd_ssi_interrupt() checks for BUSIF status, but is using "break" at for loop. This means it is not checking all status. Let's check all BUSIF status. Fixes: commit 66c705d07d784 ("SoC: rsnd: add interrupt support for SSI BUSIF buffer") Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/874kgh1jsw.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/ssi.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c index 048d53566127..9a3310393989 100644 --- a/sound/soc/sh/rcar/ssi.c +++ b/sound/soc/sh/rcar/ssi.c @@ -797,7 +797,6 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, SSI_SYS_STATUS(i * 2), 0xf << (id * 4)); stop = true; - break; } } break; @@ -815,7 +814,6 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, SSI_SYS_STATUS((i * 2) + 1), 0xf << 4); stop = true; - break; } } break; From 691b379cbe348fbead33e49d1c1d0f045a2e3446 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Thu, 8 Apr 2021 13:28:55 +0900 Subject: [PATCH 3/5] ASoC: rsnd: add rsnd_ssi_busif_err_status_clear() Current ssi.c clears BUSIF error status at __rsnd_ssi_interrupt(), but its code is verbose. This patch off-load it to rsnd_ssi_busif_err_status_clear(). Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/8735w11jso.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/ssi.c | 97 ++++++++++++++++++++++------------------- 1 file changed, 51 insertions(+), 46 deletions(-) diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c index 9a3310393989..4af024917f03 100644 --- a/sound/soc/sh/rcar/ssi.c +++ b/sound/soc/sh/rcar/ssi.c @@ -359,6 +359,55 @@ static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod, rsnd_adg_ssi_clk_stop(mod); } +static bool rsnd_ssi_busif_err_status_clear(struct rsnd_mod *mod) +{ + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct device *dev = rsnd_priv_to_dev(priv); + u32 status; + bool stop = false; + int id = rsnd_mod_id(mod); + int i; + + switch (id) { + case 0: + case 1: + case 2: + case 3: + case 4: + for (i = 0; i < 4; i++) { + status = rsnd_mod_read(mod, SSI_SYS_STATUS(i * 2)); + status &= 0xf << (id * 4); + + if (status) { + rsnd_dbg_irq_status(dev, "%s err status : 0x%08x\n", + rsnd_mod_name(mod), status); + rsnd_mod_write(mod, + SSI_SYS_STATUS(i * 2), + 0xf << (id * 4)); + stop = true; + } + } + break; + case 9: + for (i = 0; i < 4; i++) { + status = rsnd_mod_read(mod, SSI_SYS_STATUS((i * 2) + 1)); + status &= 0xf << 4; + + if (status) { + rsnd_dbg_irq_status(dev, "%s err status : 0x%08x\n", + rsnd_mod_name(mod), status); + rsnd_mod_write(mod, + SSI_SYS_STATUS((i * 2) + 1), + 0xf << 4); + stop = true; + } + } + break; + } + + return stop; +} + static void rsnd_ssi_config_init(struct rsnd_mod *mod, struct rsnd_dai_stream *io) { @@ -748,8 +797,6 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, u32 status; bool elapsed = false; bool stop = false; - int id = rsnd_mod_id(mod); - int i; int is_tdm, is_tdm_split; is_tdm = rsnd_runtime_is_tdm(io); @@ -775,50 +822,8 @@ static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, stop = true; } - status = 0; - - if (is_tdm || is_tdm_split) { - switch (id) { - case 0: - case 1: - case 2: - case 3: - case 4: - for (i = 0; i < 4; i++) { - status = rsnd_mod_read(mod, - SSI_SYS_STATUS(i * 2)); - status &= 0xf << (id * 4); - - if (status) { - rsnd_dbg_irq_status(dev, - "%s err status : 0x%08x\n", - rsnd_mod_name(mod), status); - rsnd_mod_write(mod, - SSI_SYS_STATUS(i * 2), - 0xf << (id * 4)); - stop = true; - } - } - break; - case 9: - for (i = 0; i < 4; i++) { - status = rsnd_mod_read(mod, - SSI_SYS_STATUS((i * 2) + 1)); - status &= 0xf << 4; - - if (status) { - rsnd_dbg_irq_status(dev, - "%s err status : 0x%08x\n", - rsnd_mod_name(mod), status); - rsnd_mod_write(mod, - SSI_SYS_STATUS((i * 2) + 1), - 0xf << 4); - stop = true; - } - } - break; - } - } + if (is_tdm || is_tdm_split) + stop |= rsnd_ssi_busif_err_status_clear(mod); rsnd_ssi_status_clear(mod); rsnd_ssi_interrupt_out: From 15c57ce07ce207069f1cd57ec117b11871f3afa6 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Thu, 8 Apr 2021 13:29:08 +0900 Subject: [PATCH 4/5] ASoC: rsnd: add rsnd_ssi_busif_err_irq_enable/disable() Current ssi.c has duplicated code to control BUSIF over/under run interrupt. This patch adds new rsnd_ssi_busif_err_irq_enable/disable() and share the code. Signed-off-by: Kuninori Morimoto Cc: Yongbo Zhang Cc: Chen Li Link: https://lore.kernel.org/r/871rbl1jsb.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/ssi.c | 112 ++++++++++++++++------------------------ 1 file changed, 45 insertions(+), 67 deletions(-) diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c index 4af024917f03..e29482c26d6a 100644 --- a/sound/soc/sh/rcar/ssi.c +++ b/sound/soc/sh/rcar/ssi.c @@ -359,6 +359,47 @@ static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod, rsnd_adg_ssi_clk_stop(mod); } +/* enable busif buffer over/under run interrupt. */ +#define rsnd_ssi_busif_err_irq_enable(mod) rsnd_ssi_busif_err_irq_ctrl(mod, 1) +#define rsnd_ssi_busif_err_irq_disable(mod) rsnd_ssi_busif_err_irq_ctrl(mod, 0) +static void rsnd_ssi_busif_err_irq_ctrl(struct rsnd_mod *mod, int enable) +{ + u32 sys_int_enable = 0; + int id = rsnd_mod_id(mod); + int i; + + switch (id) { + case 0: + case 1: + case 2: + case 3: + case 4: + for (i = 0; i < 4; i++) { + sys_int_enable = rsnd_mod_read(mod, SSI_SYS_INT_ENABLE(i * 2)); + if (enable) + sys_int_enable |= 0xf << (id * 4); + else + sys_int_enable &= ~(0xf << (id * 4)); + rsnd_mod_write(mod, + SSI_SYS_INT_ENABLE(i * 2), + sys_int_enable); + } + break; + case 9: + for (i = 0; i < 4; i++) { + sys_int_enable = rsnd_mod_read(mod, SSI_SYS_INT_ENABLE((i * 2) + 1)); + if (enable) + sys_int_enable |= 0xf << 4; + else + sys_int_enable &= ~(0xf << 4); + rsnd_mod_write(mod, + SSI_SYS_INT_ENABLE((i * 2) + 1), + sys_int_enable); + } + break; + } +} + static bool rsnd_ssi_busif_err_status_clear(struct rsnd_mod *mod) { struct rsnd_priv *priv = rsnd_mod_to_priv(mod); @@ -421,9 +462,6 @@ static void rsnd_ssi_config_init(struct rsnd_mod *mod, u32 wsr = ssi->wsr; int width; int is_tdm, is_tdm_split; - int id = rsnd_mod_id(mod); - int i; - u32 sys_int_enable = 0; is_tdm = rsnd_runtime_is_tdm(io); is_tdm_split = rsnd_runtime_is_tdm_split(io); @@ -499,36 +537,8 @@ static void rsnd_ssi_config_init(struct rsnd_mod *mod, } /* enable busif buffer over/under run interrupt. */ - if (is_tdm || is_tdm_split) { - switch (id) { - case 0: - case 1: - case 2: - case 3: - case 4: - for (i = 0; i < 4; i++) { - sys_int_enable = rsnd_mod_read(mod, - SSI_SYS_INT_ENABLE(i * 2)); - sys_int_enable |= 0xf << (id * 4); - rsnd_mod_write(mod, - SSI_SYS_INT_ENABLE(i * 2), - sys_int_enable); - } - - break; - case 9: - for (i = 0; i < 4; i++) { - sys_int_enable = rsnd_mod_read(mod, - SSI_SYS_INT_ENABLE((i * 2) + 1)); - sys_int_enable |= 0xf << 4; - rsnd_mod_write(mod, - SSI_SYS_INT_ENABLE((i * 2) + 1), - sys_int_enable); - } - - break; - } - } + if (is_tdm || is_tdm_split) + rsnd_ssi_busif_err_irq_enable(mod); init_end: ssi->cr_own = cr_own; @@ -585,8 +595,6 @@ static int rsnd_ssi_quit(struct rsnd_mod *mod, struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); struct device *dev = rsnd_priv_to_dev(priv); int is_tdm, is_tdm_split; - int id = rsnd_mod_id(mod); - u32 sys_int_enable = 0; is_tdm = rsnd_runtime_is_tdm(io); is_tdm_split = rsnd_runtime_is_tdm_split(io); @@ -612,38 +620,8 @@ static int rsnd_ssi_quit(struct rsnd_mod *mod, } /* disable busif buffer over/under run interrupt. */ - if (is_tdm || is_tdm_split) { - int i; - - switch (id) { - case 0: - case 1: - case 2: - case 3: - case 4: - for (i = 0; i < 4; i++) { - sys_int_enable = rsnd_mod_read(mod, - SSI_SYS_INT_ENABLE(i * 2)); - sys_int_enable &= ~(0xf << (id * 4)); - rsnd_mod_write(mod, - SSI_SYS_INT_ENABLE(i * 2), - sys_int_enable); - } - - break; - case 9: - for (i = 0; i < 4; i++) { - sys_int_enable = rsnd_mod_read(mod, - SSI_SYS_INT_ENABLE((i * 2) + 1)); - sys_int_enable &= ~(0xf << 4); - rsnd_mod_write(mod, - SSI_SYS_INT_ENABLE((i * 2) + 1), - sys_int_enable); - } - - break; - } - } + if (is_tdm || is_tdm_split) + rsnd_ssi_busif_err_irq_disable(mod); return 0; } From 63346d3d2f7cd96746149b9710a4cc5401c0cb5c Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Thu, 8 Apr 2021 13:29:15 +0900 Subject: [PATCH 5/5] ASoC: rsnd: add usage for SRC This patch add missing usage comment for SRC. Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87zgy9z9es.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/src.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c index 585ffba0244b..628af8f3920d 100644 --- a/sound/soc/sh/rcar/src.c +++ b/sound/soc/sh/rcar/src.c @@ -5,6 +5,15 @@ // Copyright (C) 2013 Renesas Solutions Corp. // Kuninori Morimoto +/* + * You can use Synchronous Sampling Rate Convert (if no DVC) + * + * amixer set "SRC Out Rate" on + * aplay xxx.wav & + * amixer set "SRC Out Rate" 96000 // convert rate to 96000Hz + * amixer set "SRC Out Rate" 22050 // convert rate to 22050Hz + */ + /* * you can enable below define if you don't need * SSI interrupt status debug message when debugging