From 2cdfe6520c939aff60bf78be2fc682e7635d0618 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Wed, 2 Jun 2021 08:43:28 +0900 Subject: [PATCH 1/5] ASoC: rsnd: adg: supply __printf(x, y) formatting for dbg_msg() Fixes the following W=1 kernel build warning(s): sound/soc/sh/rcar/adg.c: In function 'dbg_msg': sound/soc/sh/rcar/adg.c:594:2: warning: function 'dbg_msg' might \ be a candidate for 'gnu_printf' format attribute\ [-Wsuggest-attribute=format] Fixes: 1f9c82b5ab83 ("ASoC: rsnd: add debugfs support") Reported-by: kernel test robot Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87tumhi21r.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/adg.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c index 78916332c22f..390d5e22fbb8 100644 --- a/sound/soc/sh/rcar/adg.c +++ b/sound/soc/sh/rcar/adg.c @@ -584,6 +584,7 @@ rsnd_adg_get_clkout_end: } #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) +__printf(3, 4) static void dbg_msg(struct device *dev, struct seq_file *m, const char *fmt, ...) { From b48e4aa48931030382d26c624cf4ae1c68d15666 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Wed, 2 Jun 2021 08:43:36 +0900 Subject: [PATCH 2/5] ASoC: rsnd: adg: tidyup rsnd_adg_get_clkin/out() parameter set priv->adg before rsnd_adg_get_clkin/out() to be more simple code. Nothing is changed, but is preparation for next "ASoC: rsnd: adg: use more simple method for null_clk" patch Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87sg21i21j.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/adg.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c index 390d5e22fbb8..af6132479593 100644 --- a/sound/soc/sh/rcar/adg.c +++ b/sound/soc/sh/rcar/adg.c @@ -412,9 +412,9 @@ static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv) return clk_hw_get_clk(priv->null_hw, NULL_CLK); } -static void rsnd_adg_get_clkin(struct rsnd_priv *priv, - struct rsnd_adg *adg) +static void rsnd_adg_get_clkin(struct rsnd_priv *priv) { + struct rsnd_adg *adg = priv->adg; struct device *dev = rsnd_priv_to_dev(priv); int i; @@ -430,9 +430,9 @@ static void rsnd_adg_get_clkin(struct rsnd_priv *priv, } } -static void rsnd_adg_get_clkout(struct rsnd_priv *priv, - struct rsnd_adg *adg) +static void rsnd_adg_get_clkout(struct rsnd_priv *priv) { + struct rsnd_adg *adg = priv->adg; struct clk *clk; struct device *dev = rsnd_priv_to_dev(priv); struct device_node *np = dev->of_node; @@ -644,11 +644,11 @@ int rsnd_adg_probe(struct rsnd_priv *priv) if (ret) return ret; - rsnd_adg_get_clkin(priv, adg); - rsnd_adg_get_clkout(priv, adg); - priv->adg = adg; + rsnd_adg_get_clkin(priv); + rsnd_adg_get_clkout(priv); + rsnd_adg_clk_enable(priv); rsnd_adg_clk_dbg_info(priv, NULL); From cb2f97d89f383dafa822bce66f0c3514dfb135b8 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Wed, 2 Jun 2021 08:43:50 +0900 Subject: [PATCH 3/5] ASoC: rsnd: adg: use more simple method for null_clk commit 965386c97616c ("ASoC: rsnd: call unregister for null_hw when removed") tried unregister null_clk, but it has some issues. 1st issue is kernel will indicate below message when unregistering, because of its timing. unregistering should be happen after clk_disable(). clk_unregister: unregistering prepared clock: rsnd_adg_null 2nd issue is, it is using priv->null_clk, but it should be adg->null_clk. 3rd issue is it is using very complex clk registering method. more simple clk_register/unregister_fixed_rate() should be OK. This patch fixes these. Fixes: 965386c97616c ("ASoC: rsnd: call unregister for null_hw when removed") Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87r1hli215.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/adg.c | 58 +++++++++++++++++++++------------------- sound/soc/sh/rcar/rsnd.h | 1 - 2 files changed, 30 insertions(+), 29 deletions(-) diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c index af6132479593..3dfd07c8a7e3 100644 --- a/sound/soc/sh/rcar/adg.c +++ b/sound/soc/sh/rcar/adg.c @@ -28,6 +28,7 @@ static struct rsnd_mod_ops adg_ops = { struct rsnd_adg { struct clk *clk[CLKMAX]; struct clk *clkout[CLKOUTMAX]; + struct clk *null_clk; struct clk_onecell_data onecell; struct rsnd_mod mod; int clk_rate[CLKMAX]; @@ -363,53 +364,52 @@ int rsnd_adg_ssi_clk_try_start(struct rsnd_mod *ssi_mod, unsigned int rate) void rsnd_adg_clk_control(struct rsnd_priv *priv, int enable) { struct rsnd_adg *adg = rsnd_priv_to_adg(priv); - struct device *dev = rsnd_priv_to_dev(priv); struct clk *clk; int i; for_each_rsnd_clk(clk, adg, i) { if (enable) { - int ret = clk_prepare_enable(clk); + clk_prepare_enable(clk); /* * We shouldn't use clk_get_rate() under * atomic context. Let's keep it when * rsnd_adg_clk_enable() was called */ - adg->clk_rate[i] = 0; - if (ret < 0) - dev_warn(dev, "can't use clk %d\n", i); - else - adg->clk_rate[i] = clk_get_rate(clk); + adg->clk_rate[i] = clk_get_rate(clk); } else { - if (adg->clk_rate[i]) - clk_disable_unprepare(clk); - adg->clk_rate[i] = 0; + clk_disable_unprepare(clk); } } } -#define NULL_CLK "rsnd_adg_null" -static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv) +static struct clk *rsnd_adg_create_null_clk(struct rsnd_priv *priv, + const char * const name, + const char *parent) { struct device *dev = rsnd_priv_to_dev(priv); + struct clk *clk; - if (!priv->null_hw) { - struct clk_hw *_hw; - int ret; - - _hw = clk_hw_register_fixed_rate_with_accuracy(dev, NULL_CLK, NULL, 0, 0, 0); - if (IS_ERR(_hw)) - return NULL; - - ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get, _hw); - if (ret < 0) - clk_hw_unregister_fixed_rate(_hw); - - priv->null_hw = _hw; + clk = clk_register_fixed_rate(dev, name, parent, 0, 0); + if (IS_ERR(clk)) { + dev_err(dev, "create null clk error\n"); + return NULL; } - return clk_hw_get_clk(priv->null_hw, NULL_CLK); + return clk; +} + +static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv) +{ + struct rsnd_adg *adg = priv->adg; + + if (!adg->null_clk) { + static const char * const name = "rsnd_adg_null"; + + adg->null_clk = rsnd_adg_create_null_clk(priv, name, NULL); + } + + return adg->null_clk; } static void rsnd_adg_get_clkin(struct rsnd_priv *priv) @@ -666,10 +666,12 @@ void rsnd_adg_remove(struct rsnd_priv *priv) for_each_rsnd_clkout(clk, adg, i) if (adg->clkout[i]) clk_unregister_fixed_rate(adg->clkout[i]); - if (priv->null_hw) - clk_hw_unregister_fixed_rate(priv->null_hw); of_clk_del_provider(np); rsnd_adg_clk_disable(priv); + + /* It should be called after rsnd_adg_clk_disable() */ + if (adg->null_clk) + clk_unregister_fixed_rate(adg->null_clk); } diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h index b2fbe3bbaabd..0182ea5b31d2 100644 --- a/sound/soc/sh/rcar/rsnd.h +++ b/sound/soc/sh/rcar/rsnd.h @@ -646,7 +646,6 @@ struct rsnd_priv { * below value will be filled on rsnd_adg_probe() */ void *adg; - struct clk_hw *null_hw; /* * below value will be filled on rsnd_dma_probe() From d668a5e2409b2ff9291493b70c961ecbe883bfb2 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Wed, 2 Jun 2021 08:44:09 +0900 Subject: [PATCH 4/5] ASoC: rsnd: adg: check return value for rsnd_adg_get_clkin/out() Current rsnd_adg_get_clkin/out() are void function, thus adg->clk/clkout[i] might be NULL. But, for_each_rsnd_clk/clkout() macros are assuming all clks are non NULL. Because of this mismatch, code can be complex and/or buggy. These functions return error by this patch, and make sure all clks are non NULL. Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87pmx5i20m.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/adg.c | 84 ++++++++++++++++++++++++++++++----------- 1 file changed, 61 insertions(+), 23 deletions(-) diff --git a/sound/soc/sh/rcar/adg.c b/sound/soc/sh/rcar/adg.c index 3dfd07c8a7e3..0ebee1ed06a9 100644 --- a/sound/soc/sh/rcar/adg.c +++ b/sound/soc/sh/rcar/adg.c @@ -412,25 +412,53 @@ static struct clk *rsnd_adg_null_clk_get(struct rsnd_priv *priv) return adg->null_clk; } -static void rsnd_adg_get_clkin(struct rsnd_priv *priv) +static void rsnd_adg_null_clk_clean(struct rsnd_priv *priv) +{ + struct rsnd_adg *adg = priv->adg; + + if (adg->null_clk) + clk_unregister_fixed_rate(adg->null_clk); +} + +static int rsnd_adg_get_clkin(struct rsnd_priv *priv) { struct rsnd_adg *adg = priv->adg; struct device *dev = rsnd_priv_to_dev(priv); + struct clk *clk; int i; for (i = 0; i < CLKMAX; i++) { - struct clk *clk = devm_clk_get(dev, clk_name[i]); + clk = devm_clk_get(dev, clk_name[i]); if (IS_ERR(clk)) clk = rsnd_adg_null_clk_get(priv); if (IS_ERR(clk)) - dev_err(dev, "no adg clock (%s)\n", clk_name[i]); + goto err; adg->clk[i] = clk; } + + return 0; + +err: + dev_err(dev, "adg clock IN get failed\n"); + + rsnd_adg_null_clk_clean(priv); + + return -EIO; } -static void rsnd_adg_get_clkout(struct rsnd_priv *priv) +static void rsnd_adg_unregister_clkout(struct rsnd_priv *priv) +{ + struct rsnd_adg *adg = priv->adg; + struct clk *clk; + int i; + + for_each_rsnd_clkout(clk, adg, i) + clk_unregister_fixed_rate(clk); +} + +static int rsnd_adg_get_clkout(struct rsnd_priv *priv) { struct rsnd_adg *adg = priv->adg; struct clk *clk; @@ -472,9 +500,8 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv) req_size = prop->length / sizeof(u32); if (req_size > REQ_SIZE) { - dev_err(dev, - "too many clock-frequency, use top %d\n", REQ_SIZE); - req_size = REQ_SIZE; + dev_err(dev, "too many clock-frequency\n"); + return -EINVAL; } of_property_read_u32_array(np, "clock-frequency", req_rate, req_size); @@ -555,10 +582,11 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv) if (!count) { clk = clk_register_fixed_rate(dev, clkout_name[CLKOUT], parent_clk_name, 0, req_rate[0]); - if (!IS_ERR(clk)) { - adg->clkout[CLKOUT] = clk; - of_clk_add_provider(np, of_clk_src_simple_get, clk); - } + if (IS_ERR(clk)) + goto err; + + adg->clkout[CLKOUT] = clk; + of_clk_add_provider(np, of_clk_src_simple_get, clk); } /* * for clkout0/1/2/3 @@ -568,8 +596,10 @@ static void rsnd_adg_get_clkout(struct rsnd_priv *priv) clk = clk_register_fixed_rate(dev, clkout_name[i], parent_clk_name, 0, req_rate[0]); - if (!IS_ERR(clk)) - adg->clkout[i] = clk; + if (IS_ERR(clk)) + goto err; + + adg->clkout[i] = clk; } adg->onecell.clks = adg->clkout; adg->onecell.clk_num = CLKOUTMAX; @@ -581,6 +611,15 @@ rsnd_adg_get_clkout_end: adg->ckr = ckr; adg->rbga = rbga; adg->rbgb = rbgb; + + return 0; + +err: + dev_err(dev, "adg clock OUT get failed\n"); + + rsnd_adg_unregister_clkout(priv); + + return -EIO; } #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) @@ -646,8 +685,13 @@ int rsnd_adg_probe(struct rsnd_priv *priv) priv->adg = adg; - rsnd_adg_get_clkin(priv); - rsnd_adg_get_clkout(priv); + ret = rsnd_adg_get_clkin(priv); + if (ret) + return ret; + + ret = rsnd_adg_get_clkout(priv); + if (ret) + return ret; rsnd_adg_clk_enable(priv); rsnd_adg_clk_dbg_info(priv, NULL); @@ -659,19 +703,13 @@ void rsnd_adg_remove(struct rsnd_priv *priv) { struct device *dev = rsnd_priv_to_dev(priv); struct device_node *np = dev->of_node; - struct rsnd_adg *adg = priv->adg; - struct clk *clk; - int i; - for_each_rsnd_clkout(clk, adg, i) - if (adg->clkout[i]) - clk_unregister_fixed_rate(adg->clkout[i]); + rsnd_adg_unregister_clkout(priv); of_clk_del_provider(np); rsnd_adg_clk_disable(priv); /* It should be called after rsnd_adg_clk_disable() */ - if (adg->null_clk) - clk_unregister_fixed_rate(adg->null_clk); + rsnd_adg_null_clk_clean(priv); } From 3f4593fb4a9ddb53edefcbf7d4c5fd1f04717422 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Wed, 2 Jun 2021 08:44:39 +0900 Subject: [PATCH 5/5] ASoC: rsnd: tidyup __rsnd_mod_xxx macro comments status and __rsnd_mod_xxx were updated, but some related comments were not. And it has verbose comments. This patch cleanup/tidyup these. 1) adds missing "D" to status sample 2) remove verbose list for "H" 3) add "needs protect" to __rsnd_mod_call_xxx Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87o8cpi1zs.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown --- sound/soc/sh/rcar/rsnd.h | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-) diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h index 0182ea5b31d2..6580bab0e229 100644 --- a/sound/soc/sh/rcar/rsnd.h +++ b/sound/soc/sh/rcar/rsnd.h @@ -364,19 +364,13 @@ struct rsnd_mod { /* * status * - * 0xH0000CB0 + * 0xH000DCB0 * * B 0: init 1: quit * C 0: start 1: stop * D 0: hw_params 1: hw_free * * H is always called (see __rsnd_mod_call) - * H 0: probe 1: remove - * H 0: pcm_new - * H 0: fallback - * H 0: pointer - * H 0: prepare - * H 0: cleanup */ #define __rsnd_mod_shift_init 4 #define __rsnd_mod_shift_quit 4 @@ -412,16 +406,16 @@ struct rsnd_mod { #define __rsnd_mod_call_remove 0 #define __rsnd_mod_call_prepare 0 #define __rsnd_mod_call_cleanup 0 -#define __rsnd_mod_call_init 0 -#define __rsnd_mod_call_quit 1 -#define __rsnd_mod_call_start 0 -#define __rsnd_mod_call_stop 1 +#define __rsnd_mod_call_init 0 /* needs protect */ +#define __rsnd_mod_call_quit 1 /* needs protect */ +#define __rsnd_mod_call_start 0 /* needs protect */ +#define __rsnd_mod_call_stop 1 /* needs protect */ +#define __rsnd_mod_call_hw_params 0 /* needs protect */ +#define __rsnd_mod_call_hw_free 1 /* needs protect */ #define __rsnd_mod_call_irq 0 #define __rsnd_mod_call_pcm_new 0 #define __rsnd_mod_call_fallback 0 -#define __rsnd_mod_call_hw_params 0 #define __rsnd_mod_call_pointer 0 -#define __rsnd_mod_call_hw_free 1 #define rsnd_mod_to_priv(mod) ((mod)->priv) #define rsnd_mod_power_on(mod) clk_enable((mod)->clk)