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[73.162.191.63]) by smtp.gmail.com with ESMTPSA id 7sm12153013pfc.203.2020.05.24.22.09.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 24 May 2020 22:09:58 -0700 (PDT) Date: Sun, 24 May 2020 22:09:51 -0700 From: Nicolin Chen To: Shengjiu Wang Subject: Re: [PATCH] ASoC: fsl_asrc: Merge suspend/resume function to runtime_suspend/resume Message-ID: <20200525050950.GA1244@Asurada> References: <1590141444-28668-1-git-send-email-shengjiu.wang@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1590141444-28668-1-git-send-email-shengjiu.wang@nxp.com> User-Agent: Mutt/1.5.22 (2013-10-16) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alsa-devel@alsa-project.org, timur@kernel.org, Xiubo.Lee@gmail.com, linuxppc-dev@lists.ozlabs.org, tiwai@suse.com, lgirdwood@gmail.com, perex@perex.cz, broonie@kernel.org, festevam@gmail.com, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, May 22, 2020 at 05:57:24PM +0800, Shengjiu Wang wrote: > With dedicated power domain for asrc, power can be disabled after > probe and pm runtime suspend, then the value of all registers need to > be restored in pm runtime resume. So we can merge suspend/resume function > to runtime_suspend/resume function and enable regcache only in end of > probe. > > Signed-off-by: Shengjiu Wang > --- > sound/soc/fsl/fsl_asrc.c | 70 ++++++++++++++++------------------------ > 1 file changed, 27 insertions(+), 43 deletions(-) > > diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c > index 432936039de4..3ebbe15ac378 100644 > --- a/sound/soc/fsl/fsl_asrc.c > +++ b/sound/soc/fsl/fsl_asrc.c > @@ -1100,6 +1100,7 @@ static int fsl_asrc_probe(struct platform_device *pdev) > platform_set_drvdata(pdev, asrc); > pm_runtime_enable(&pdev->dev); > spin_lock_init(&asrc->lock); > + regcache_cache_only(asrc->regmap, true); > > ret = devm_snd_soc_register_component(&pdev->dev, &fsl_asrc_component, > &fsl_asrc_dai, 1); > @@ -1117,6 +1118,7 @@ static int fsl_asrc_runtime_resume(struct device *dev) > struct fsl_asrc *asrc = dev_get_drvdata(dev); > struct fsl_asrc_priv *asrc_priv = asrc->private; > int i, ret; > + u32 asrctr; > > ret = clk_prepare_enable(asrc->mem_clk); > if (ret) > @@ -1135,6 +1137,24 @@ static int fsl_asrc_runtime_resume(struct device *dev) > goto disable_asrck_clk; > } > > + /* Stop all pairs provisionally */ > + regmap_read(asrc->regmap, REG_ASRCTR, &asrctr); > + regmap_update_bits(asrc->regmap, REG_ASRCTR, > + ASRCTR_ASRCEi_ALL_MASK, 0); > + > + /* Restore all registers */ > + regcache_cache_only(asrc->regmap, false); > + regcache_mark_dirty(asrc->regmap); I see you doing regcache_mark_dirty() in the resume() now, being different from previously doing in suspend()? Thanks Nic > + regcache_sync(asrc->regmap); > + > + regmap_update_bits(asrc->regmap, REG_ASRCFG, > + ASRCFG_NDPRi_ALL_MASK | ASRCFG_POSTMODi_ALL_MASK | > + ASRCFG_PREMODi_ALL_MASK, asrc_priv->regcache_cfg); > + > + /* Restart enabled pairs */ > + regmap_update_bits(asrc->regmap, REG_ASRCTR, > + ASRCTR_ASRCEi_ALL_MASK, asrctr); > + > return 0; > > disable_asrck_clk: > @@ -1155,6 +1175,11 @@ static int fsl_asrc_runtime_suspend(struct device *dev) > struct fsl_asrc_priv *asrc_priv = asrc->private; > int i; > > + regmap_read(asrc->regmap, REG_ASRCFG, > + &asrc_priv->regcache_cfg); > + > + regcache_cache_only(asrc->regmap, true); > + > for (i = 0; i < ASRC_CLK_MAX_NUM; i++) > clk_disable_unprepare(asrc_priv->asrck_clk[i]); > if (!IS_ERR(asrc->spba_clk)) > @@ -1166,51 +1191,10 @@ static int fsl_asrc_runtime_suspend(struct device *dev) > } > #endif /* CONFIG_PM */ > > -#ifdef CONFIG_PM_SLEEP > -static int fsl_asrc_suspend(struct device *dev) > -{ > - struct fsl_asrc *asrc = dev_get_drvdata(dev); > - struct fsl_asrc_priv *asrc_priv = asrc->private; > - > - regmap_read(asrc->regmap, REG_ASRCFG, > - &asrc_priv->regcache_cfg); > - > - regcache_cache_only(asrc->regmap, true); > - regcache_mark_dirty(asrc->regmap); > - > - return 0; > -} > - > -static int fsl_asrc_resume(struct device *dev) > -{ > - struct fsl_asrc *asrc = dev_get_drvdata(dev); > - struct fsl_asrc_priv *asrc_priv = asrc->private; > - u32 asrctr; > - > - /* Stop all pairs provisionally */ > - regmap_read(asrc->regmap, REG_ASRCTR, &asrctr); > - regmap_update_bits(asrc->regmap, REG_ASRCTR, > - ASRCTR_ASRCEi_ALL_MASK, 0); > - > - /* Restore all registers */ > - regcache_cache_only(asrc->regmap, false); > - regcache_sync(asrc->regmap); > - > - regmap_update_bits(asrc->regmap, REG_ASRCFG, > - ASRCFG_NDPRi_ALL_MASK | ASRCFG_POSTMODi_ALL_MASK | > - ASRCFG_PREMODi_ALL_MASK, asrc_priv->regcache_cfg); > - > - /* Restart enabled pairs */ > - regmap_update_bits(asrc->regmap, REG_ASRCTR, > - ASRCTR_ASRCEi_ALL_MASK, asrctr); > - > - return 0; > -} > -#endif /* CONFIG_PM_SLEEP */ > - > static const struct dev_pm_ops fsl_asrc_pm = { > SET_RUNTIME_PM_OPS(fsl_asrc_runtime_suspend, fsl_asrc_runtime_resume, NULL) > - SET_SYSTEM_SLEEP_PM_OPS(fsl_asrc_suspend, fsl_asrc_resume) > + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, > + pm_runtime_force_resume) > }; > > static const struct fsl_asrc_soc_data fsl_asrc_imx35_data = { > -- > 2.21.0 >