From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 53EADC02181 for ; Mon, 20 Jan 2025 15:38:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ANJPCSkCCb0eS2yvATOLuOGqa6XlfMQzzFOr0IfNQxY=; b=sWFT4gyn5/KmajSEHXRh8CI9k7 qD+6oY3sBq1k5w8jtFIMGixsbhJlCKLWjUes1YCtB5cWYbmjTdKMxjJ4ZWlXsmX+omMde1M8pMbsy ltu5CLZYXZFJHwHfD40XFcE1rRUVdgUFamG5w8e5CcPV7sdpGGEcNAnTQRftfczic+eI4wqpsA/3b nOF7fI40eXLF1RIaQZ0d9Guc6ljaJL+cOeVkdIfqONkvb+dkxsemE9Am/CLq8e9ELhcQ5MI5op8Lp FG5Qh9QizQggg6uwhuUpl6eI6s3b/8kmU1mkY6aq3mUfxgMLaUOim50z1L3r/VMnINuGiJhbfl8zX bOabVCsA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tZtqP-00000005tll-3N4f; Mon, 20 Jan 2025 15:37:41 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tZtp8-00000005td8-1nsJ; Mon, 20 Jan 2025 15:36:23 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id DC3EF5C5B1C; Mon, 20 Jan 2025 15:35:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6F9AC4CEDD; Mon, 20 Jan 2025 15:36:12 +0000 (UTC) Date: Mon, 20 Jan 2025 21:06:02 +0530 From: Manivannan Sadhasivam To: Ziqi Chen Cc: Manivannan Sadhasivam , quic_cang@quicinc.com, bvanassche@acm.org, beanhuo@micron.com, avri.altman@wdc.com, junwoo80.lee@samsung.com, martin.petersen@oracle.com, quic_nguyenb@quicinc.com, quic_nitirawa@quicinc.com, quic_rampraka@quicinc.com, linux-scsi@vger.kernel.org, Alim Akhtar , "James E.J. Bottomley" , Peter Wang , Stanley Jhu , Matthias Brugger , AngeloGioacchino Del Regno , Andrew Halaney , Maramaina Naresh , Eric Biggers , Minwoo Im , open list , "moderated list:UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER..." , "open list:UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER..." , "moderated list:ARM/Mediatek SoC support:Keyword:mediatek" Subject: Re: [PATCH 1/8] scsi: ufs: core: Pass target_freq to clk_scale_notify() vops Message-ID: <20250120153602.wij4vbodjzi24aok@thinkpad> References: <20250116091150.1167739-1-quic_ziqichen@quicinc.com> <20250116091150.1167739-2-quic_ziqichen@quicinc.com> <20250119071131.4hepn6msmh76npi7@thinkpad> <57d52f72-31ec-46cf-b632-74b09e29f501@quicinc.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <57d52f72-31ec-46cf-b632-74b09e29f501@quicinc.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250120_073622_559170_AD5B31BD X-CRM114-Status: GOOD ( 37.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jan 20, 2025 at 08:01:03PM +0800, Ziqi Chen wrote: > Hi Mani, > > Thanks for you review~ > > On 1/19/2025 3:11 PM, Manivannan Sadhasivam wrote: > > On Thu, Jan 16, 2025 at 05:11:42PM +0800, Ziqi Chen wrote: > > > From: Can Guo > > > > > > If OPP V2 is used, devfreq clock scaling may scale clock amongst more than > > > two freqs, > > > > 'amongst more than two freqs': I couldn't parse this. > > > > It means that the devfreq framework will tell UFS core driver the devfreq > freq, then UFS core driver will find the recommended freq from our freq > table based on the devfreq freq. For legacy mode , we can only have 2 > frequencies in the table. But if the OPP V2 is used, we can have 3 , 4 or > more freq tables. You can refer to my PATCH 8/8. > I got the motive, but the wording is not correct. > > > so just passing up/down to vops clk_scale_notify() is not enough > > > to cover the intermediate clock freqs between the min and max freqs. Hence > > > pass the target_freq to clk_scale_notify() to allow the vops to perform > > > corresponding configurations with regard to the clock freqs. > > > > > > > Add a note that the 'target_freq' is not used in this commit. > > > > Sorry, I don't very understand this comment, I mentioned the "target_freq" > in the commit message, Could you let me know what note you want me do add? > This patch is introducing 'target_freq' as a parameter, but it is not used. I was asking you to mention that it will be used in successive commits. > > > Co-developed-by: Ziqi Chen > > > Signed-off-by: Ziqi Chen > > > Signed-off-by: Can Guo > > > > Signed-off-by tag order is not correct here. This implies that Ziqi originally > > worked on it, then Can took over and submitted. But it seems the reverse. > > Thanks for your reminder. Is below tag order OK ? > Signed-off-by: Can Guo > Co-developed-by: Ziqi Chen > Signed-off-by: Ziqi Chen > > > > - Mani > > -Ziqi > > > > > > --- > > > drivers/ufs/core/ufshcd-priv.h | 7 ++++--- > > > drivers/ufs/core/ufshcd.c | 4 ++-- > > > drivers/ufs/host/ufs-mediatek.c | 1 + > > > drivers/ufs/host/ufs-qcom.c | 5 +++-- > > > include/ufs/ufshcd.h | 2 +- > > > 5 files changed, 11 insertions(+), 8 deletions(-) > > > > > > diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h > > > index 9ffd94ddf8c7..0549b65f71ed 100644 > > > --- a/drivers/ufs/core/ufshcd-priv.h > > > +++ b/drivers/ufs/core/ufshcd-priv.h > > > @@ -117,11 +117,12 @@ static inline u32 ufshcd_vops_get_ufs_hci_version(struct ufs_hba *hba) > > > return ufshcd_readl(hba, REG_UFS_VERSION); > > > } > > > -static inline int ufshcd_vops_clk_scale_notify(struct ufs_hba *hba, > > > - bool up, enum ufs_notify_change_status status) > > > +static inline int ufshcd_vops_clk_scale_notify(struct ufs_hba *hba, bool up, > > > + unsigned long target_freq, > > > + enum ufs_notify_change_status status) > > > { > > > if (hba->vops && hba->vops->clk_scale_notify) > > > - return hba->vops->clk_scale_notify(hba, up, status); > > > + return hba->vops->clk_scale_notify(hba, up, target_freq, status); > > > return 0; > > > } > > > diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c > > > index acc3607bbd9c..8d295cc827cc 100644 > > > --- a/drivers/ufs/core/ufshcd.c > > > +++ b/drivers/ufs/core/ufshcd.c > > > @@ -1157,7 +1157,7 @@ static int ufshcd_scale_clks(struct ufs_hba *hba, unsigned long freq, > > > int ret = 0; > > > ktime_t start = ktime_get(); > > > - ret = ufshcd_vops_clk_scale_notify(hba, scale_up, PRE_CHANGE); > > > + ret = ufshcd_vops_clk_scale_notify(hba, scale_up, freq, PRE_CHANGE); > > > if (ret) > > > goto out; > > > @@ -1168,7 +1168,7 @@ static int ufshcd_scale_clks(struct ufs_hba *hba, unsigned long freq, > > > if (ret) > > > goto out; > > > - ret = ufshcd_vops_clk_scale_notify(hba, scale_up, POST_CHANGE); > > > + ret = ufshcd_vops_clk_scale_notify(hba, scale_up, freq, POST_CHANGE); > > > if (ret) { > > > if (hba->use_pm_opp) > > > ufshcd_opp_set_rate(hba, > > > diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c > > > index 135cd78109e2..977dd0caaef6 100644 > > > --- a/drivers/ufs/host/ufs-mediatek.c > > > +++ b/drivers/ufs/host/ufs-mediatek.c > > > @@ -1643,6 +1643,7 @@ static void ufs_mtk_clk_scale(struct ufs_hba *hba, bool scale_up) > > > } > > > static int ufs_mtk_clk_scale_notify(struct ufs_hba *hba, bool scale_up, > > > + unsigned long target_freq, > > > enum ufs_notify_change_status status) > > > { > > > if (!ufshcd_is_clkscaling_supported(hba)) > > > diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c > > > index 68040b2ab5f8..b6eef975dc46 100644 > > > --- a/drivers/ufs/host/ufs-qcom.c > > > +++ b/drivers/ufs/host/ufs-qcom.c > > > @@ -1333,8 +1333,9 @@ static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba) > > > return ufs_qcom_set_core_clk_ctrl(hba, false); > > > } > > > -static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, > > > - bool scale_up, enum ufs_notify_change_status status) > > > +static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, bool scale_up, > > > + unsigned long target_freq, > > > + enum ufs_notify_change_status status) > > > { > > > struct ufs_qcom_host *host = ufshcd_get_variant(hba); > > > int err; > > > diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h > > > index d7aca9e61684..a4dac897a169 100644 > > > --- a/include/ufs/ufshcd.h > > > +++ b/include/ufs/ufshcd.h > > > @@ -344,7 +344,7 @@ struct ufs_hba_variant_ops { > > > void (*exit)(struct ufs_hba *); > > > u32 (*get_ufs_hci_version)(struct ufs_hba *); > > > int (*set_dma_mask)(struct ufs_hba *); > > > - int (*clk_scale_notify)(struct ufs_hba *, bool, > > > + int (*clk_scale_notify)(struct ufs_hba *, bool, unsigned long, > > > enum ufs_notify_change_status); > > > int (*setup_clocks)(struct ufs_hba *, bool, > > > enum ufs_notify_change_status); > > > -- > > > 2.34.1 > > > > > -- மணிவண்ணன் சதாசிவம்