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 5C569C433F5 for ; Wed, 16 Mar 2022 16:35:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To: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=wFZ6KDAGMQzuVflvmDY4bH4QV9EENZrz8SkPD4n0SHE=; b=dwQB6x2tldj4WX cKrviZP1EZtEwdpPHIU/cM9kBrqYAyPkHcob0HNd0ixWLkl87mtkcIiFjJ+w4EStR74N3JxmZip6R m/YW6pvYWsSmvRiXIn+CKJsewFNyHd9KMIXN7jCdIUn8bEUNbpAQJbxUyE3kUe5VD64+MwRxsFvuI LaiVAZ7likB3MdrYnYWP1BMbi3gmYnOL6SQJ8AgT5uDtUZVDgzPeRnjmyLl6oPsZHEVdmpcElhJ6d MPEXzDrXJy1jcoR/45Wd9fOg/CX1z8Z/oFChy2ou7YtWaGi91b9csrqnZOydXKspmANy4PbeTCYc0 E9k2dsirDvaPo1T6K9Iw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nUWcD-00DoJx-OC; Wed, 16 Mar 2022 16:35:13 +0000 Received: from mail-pj1-x1034.google.com ([2607:f8b0:4864:20::1034]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nUWbx-00DoFK-It for linux-mediatek@lists.infradead.org; Wed, 16 Mar 2022 16:34:59 +0000 Received: by mail-pj1-x1034.google.com with SMTP id o6-20020a17090a9f8600b001c6562049d9so2916478pjp.3 for ; Wed, 16 Mar 2022 09:34:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=Yi7Fr4VjNaLYohLqXAKfgtCUa62BFfEOwT38Sq58nO0=; b=m+T/AT+HiyIWBjaMKOoseHgXZJjQky0/ENj6At7vGTwxAQw4MSXeCCrSIQ6JTNxiIK az7JoNRc5wwr+bk3EPQnv4OhhhI+G4KiGAgUPYinnC4sL6I7R19X9eO7odrfGbCmkoww NqQqxPbj9PbPu7gl2dojfc5Kl5KHhJ+1FvVNqJdbSd5nUhiBODGX04SRbvSCxRgvC7Oj qH0bAMr2tqpHEIbsyuZoyWwkvEHDBOpNAfvvaX4c1vRJK+lhPsuHYYCL8jQUvj1Vj2HP ySyH/wpDv67NZMnYhx5G6Ehoww3EQvWqBnHG59IEsBKPVzDM2W+DXHTdQ4eSVTaRWV9n 6elQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=Yi7Fr4VjNaLYohLqXAKfgtCUa62BFfEOwT38Sq58nO0=; b=uOcC4+5Th3qUucWT6Mfm233NjbEhPBThLlP8IzIKzjCrEjTnloBFYSxETPiAfsadRf DzQUwAoxjN67jD0+ikD7FjIk0SFW9Pp855R6yl21xwKJQnqaFIqYwi3J3yUYlRneJ8KJ 6GI14JKI4R/9Gg4XkYFgDTPiG0J6t4Z8uBEQ9kO4nN24b9WtEXx595mq2NiH5cAE85z3 dn1qsd2nDsfLGTq4FVekqHrrbUxW/cqeD4JSB66HjSlNGQdtqBAKzLYn6teBXX65R04v 4tisITtqLfTXXB3XPmSlIuolZBfJBq345NFwFVlUbUbJCbnbY5BrN9w43vtEJxXyUA8Y kLeQ== X-Gm-Message-State: AOAM5336KsbR+YrF7JB1c53SdCciG681Vp+GO8jmnjPYyurzT3mX8GXs 5kB74DRewg/SC8RXoe3PsR8fPA== X-Google-Smtp-Source: ABdhPJwf+LjEDU0Y7vIqn4NhNtObxMCOjI13MunbIn9VX1QWxHz7JQkwgz9JFx3M3K3LM+iJ46BQ4w== X-Received: by 2002:a17:90a:408d:b0:1bf:610b:6209 with SMTP id l13-20020a17090a408d00b001bf610b6209mr11097180pjg.194.1647448495431; Wed, 16 Mar 2022 09:34:55 -0700 (PDT) Received: from p14s (S0106889e681aac74.cg.shawcable.net. [68.147.0.187]) by smtp.gmail.com with ESMTPSA id oc3-20020a17090b1c0300b001bf8c88a8c4sm7321131pjb.35.2022.03.16.09.34.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Mar 2022 09:34:53 -0700 (PDT) Date: Wed, 16 Mar 2022 10:34:51 -0600 From: Mathieu Poirier To: Tinghan Shen Cc: Bjorn Andersson , Matthias Brugger , linux-remoteproc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, AngeloGioacchino Del Regno , Project_Global_Chrome_Upstream_Group@mediatek.com Subject: Re: [PATCH v4] remoteproc: mediatek: Fix side effect of mt8195 sram power on Message-ID: <20220316163451.GA2546942@p14s> References: <20220316031117.7311-1-tinghan.shen@mediatek.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220316031117.7311-1-tinghan.shen@mediatek.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220316_093457_637177_2FB31371 X-CRM114-Status: GOOD ( 30.65 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Good morning, On Wed, Mar 16, 2022 at 11:11:17AM +0800, Tinghan Shen wrote: > The definition of L1TCM_SRAM_PDN bits on mt8195 is different to mt8192. > > L1TCM_SRAM_PDN bits[3:0] control the power of mt8195 L1TCM SRAM. > > L1TCM_SRAM_PDN bits[7:4] control the access path to EMI for SCP. > These bits have to be powered on to allow EMI access for SCP. > > Bits[7:4] also affect audio DSP because audio DSP and SCP are > placed on the same hardware bus. If SCP cannot access EMI, audio DSP is > blocked too. > > L1TCM_SRAM_PDN bits[31:8] are not used. > > This fix removes modification of bits[7:4] when power on/off mt8195 SCP > L1TCM. It's because the modification introduces a short period of time > blocking audio DSP to access EMI. This was not a problem until we have > to load both SCP module and audio DSP module. audio DSP needs to access > EMI because it has source/data on DRAM. Audio DSP will have unexpected > behavior when it accesses EMI and the SCP driver blocks the EMI path at > the same time. > > Fixes: 79111df414fc ("remoteproc: mediatek: Support mt8195 scp") > Signed-off-by: Tinghan Shen > Reviewed-by: AngeloGioacchino Del Regno > Reviewed-by: Matthias Brugger > --- > v4: add Fixes and Reviewed-by tags > v3: fix build error > v2: apply comments about macro definition and function calls > --- > drivers/remoteproc/mtk_common.h | 2 ++ > drivers/remoteproc/mtk_scp.c | 67 +++++++++++++++++++++++++++++++---------- > 2 files changed, 53 insertions(+), 16 deletions(-) > > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h > index 5ff3867c72f3..ff954a06637c 100644 > --- a/drivers/remoteproc/mtk_common.h > +++ b/drivers/remoteproc/mtk_common.h > @@ -51,6 +51,8 @@ > #define MT8192_CORE0_WDT_IRQ 0x10030 > #define MT8192_CORE0_WDT_CFG 0x10034 > > +#define MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS GENMASK(7, 4) > + > #define SCP_FW_VER_LEN 32 > #define SCP_SHARE_BUFFER_SIZE 288 > > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > index 36e48cf58ed6..5f686fe09203 100644 > --- a/drivers/remoteproc/mtk_scp.c > +++ b/drivers/remoteproc/mtk_scp.c > @@ -365,22 +365,22 @@ static int mt8183_scp_before_load(struct mtk_scp *scp) > return 0; > } > > -static void mt8192_power_on_sram(void __iomem *addr) > +static void scp_sram_power_on(void __iomem *addr, u32 reserved_mask) Why is @reserved_mask needed? It is not described in the changelong and as far as I can see in this patchset the parameter is always set to '0', which has no effect on the mask that gets generated. Thanks, Mathieu > { > int i; > > for (i = 31; i >= 0; i--) > - writel(GENMASK(i, 0), addr); > + writel(GENMASK(i, 0) & ~reserved_mask, addr); > writel(0, addr); > } > > -static void mt8192_power_off_sram(void __iomem *addr) > +static void scp_sram_power_off(void __iomem *addr, u32 reserved_mask) > { > int i; > > writel(0, addr); > for (i = 0; i < 32; i++) > - writel(GENMASK(i, 0), addr); > + writel(GENMASK(i, 0) & ~reserved_mask, addr); > } > > static int mt8192_scp_before_load(struct mtk_scp *scp) > @@ -391,11 +391,32 @@ static int mt8192_scp_before_load(struct mtk_scp *scp) > writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_SET); > > /* enable SRAM clock */ > - mt8192_power_on_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_0); > - mt8192_power_on_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_1); > - mt8192_power_on_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_2); > - mt8192_power_on_sram(scp->reg_base + MT8192_L1TCM_SRAM_PDN); > - mt8192_power_on_sram(scp->reg_base + MT8192_CPU0_SRAM_PD); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L1TCM_SRAM_PDN, 0); > + scp_sram_power_on(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > + > + /* enable MPU for all memory regions */ > + writel(0xff, scp->reg_base + MT8192_CORE0_MEM_ATT_PREDEF); > + > + return 0; > +} > + > +static int mt8195_scp_before_load(struct mtk_scp *scp) > +{ > + /* clear SPM interrupt, SCP2SPM_IPC_CLR */ > + writel(0xff, scp->reg_base + MT8192_SCP2SPM_IPC_CLR); > + > + writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_SET); > + > + /* enable SRAM clock */ > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L1TCM_SRAM_PDN, > + MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS); > + scp_sram_power_on(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > > /* enable MPU for all memory regions */ > writel(0xff, scp->reg_base + MT8192_CORE0_MEM_ATT_PREDEF); > @@ -551,11 +572,25 @@ static void mt8183_scp_stop(struct mtk_scp *scp) > static void mt8192_scp_stop(struct mtk_scp *scp) > { > /* Disable SRAM clock */ > - mt8192_power_off_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_0); > - mt8192_power_off_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_1); > - mt8192_power_off_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_2); > - mt8192_power_off_sram(scp->reg_base + MT8192_L1TCM_SRAM_PDN); > - mt8192_power_off_sram(scp->reg_base + MT8192_CPU0_SRAM_PD); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L1TCM_SRAM_PDN, 0); > + scp_sram_power_off(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > + > + /* Disable SCP watchdog */ > + writel(0, scp->reg_base + MT8192_CORE0_WDT_CFG); > +} > + > +static void mt8195_scp_stop(struct mtk_scp *scp) > +{ > + /* Disable SRAM clock */ > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L1TCM_SRAM_PDN, > + MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS); > + scp_sram_power_off(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > > /* Disable SCP watchdog */ > writel(0, scp->reg_base + MT8192_CORE0_WDT_CFG); > @@ -901,11 +936,11 @@ static const struct mtk_scp_of_data mt8192_of_data = { > > static const struct mtk_scp_of_data mt8195_of_data = { > .scp_clk_get = mt8195_scp_clk_get, > - .scp_before_load = mt8192_scp_before_load, > + .scp_before_load = mt8195_scp_before_load, > .scp_irq_handler = mt8192_scp_irq_handler, > .scp_reset_assert = mt8192_scp_reset_assert, > .scp_reset_deassert = mt8192_scp_reset_deassert, > - .scp_stop = mt8192_scp_stop, > + .scp_stop = mt8195_scp_stop, > .scp_da_to_va = mt8192_scp_da_to_va, > .host_to_scp_reg = MT8192_GIPC_IN_SET, > .host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT, > -- > 2.15.GIT > _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DACFC433F5 for ; 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[68.147.0.187]) by smtp.gmail.com with ESMTPSA id oc3-20020a17090b1c0300b001bf8c88a8c4sm7321131pjb.35.2022.03.16.09.34.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Mar 2022 09:34:53 -0700 (PDT) Date: Wed, 16 Mar 2022 10:34:51 -0600 From: Mathieu Poirier To: Tinghan Shen Cc: Bjorn Andersson , Matthias Brugger , linux-remoteproc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, AngeloGioacchino Del Regno , Project_Global_Chrome_Upstream_Group@mediatek.com Subject: Re: [PATCH v4] remoteproc: mediatek: Fix side effect of mt8195 sram power on Message-ID: <20220316163451.GA2546942@p14s> References: <20220316031117.7311-1-tinghan.shen@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220316031117.7311-1-tinghan.shen@mediatek.com> Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org Good morning, On Wed, Mar 16, 2022 at 11:11:17AM +0800, Tinghan Shen wrote: > The definition of L1TCM_SRAM_PDN bits on mt8195 is different to mt8192. > > L1TCM_SRAM_PDN bits[3:0] control the power of mt8195 L1TCM SRAM. > > L1TCM_SRAM_PDN bits[7:4] control the access path to EMI for SCP. > These bits have to be powered on to allow EMI access for SCP. > > Bits[7:4] also affect audio DSP because audio DSP and SCP are > placed on the same hardware bus. If SCP cannot access EMI, audio DSP is > blocked too. > > L1TCM_SRAM_PDN bits[31:8] are not used. > > This fix removes modification of bits[7:4] when power on/off mt8195 SCP > L1TCM. It's because the modification introduces a short period of time > blocking audio DSP to access EMI. This was not a problem until we have > to load both SCP module and audio DSP module. audio DSP needs to access > EMI because it has source/data on DRAM. Audio DSP will have unexpected > behavior when it accesses EMI and the SCP driver blocks the EMI path at > the same time. > > Fixes: 79111df414fc ("remoteproc: mediatek: Support mt8195 scp") > Signed-off-by: Tinghan Shen > Reviewed-by: AngeloGioacchino Del Regno > Reviewed-by: Matthias Brugger > --- > v4: add Fixes and Reviewed-by tags > v3: fix build error > v2: apply comments about macro definition and function calls > --- > drivers/remoteproc/mtk_common.h | 2 ++ > drivers/remoteproc/mtk_scp.c | 67 +++++++++++++++++++++++++++++++---------- > 2 files changed, 53 insertions(+), 16 deletions(-) > > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h > index 5ff3867c72f3..ff954a06637c 100644 > --- a/drivers/remoteproc/mtk_common.h > +++ b/drivers/remoteproc/mtk_common.h > @@ -51,6 +51,8 @@ > #define MT8192_CORE0_WDT_IRQ 0x10030 > #define MT8192_CORE0_WDT_CFG 0x10034 > > +#define MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS GENMASK(7, 4) > + > #define SCP_FW_VER_LEN 32 > #define SCP_SHARE_BUFFER_SIZE 288 > > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > index 36e48cf58ed6..5f686fe09203 100644 > --- a/drivers/remoteproc/mtk_scp.c > +++ b/drivers/remoteproc/mtk_scp.c > @@ -365,22 +365,22 @@ static int mt8183_scp_before_load(struct mtk_scp *scp) > return 0; > } > > -static void mt8192_power_on_sram(void __iomem *addr) > +static void scp_sram_power_on(void __iomem *addr, u32 reserved_mask) Why is @reserved_mask needed? It is not described in the changelong and as far as I can see in this patchset the parameter is always set to '0', which has no effect on the mask that gets generated. Thanks, Mathieu > { > int i; > > for (i = 31; i >= 0; i--) > - writel(GENMASK(i, 0), addr); > + writel(GENMASK(i, 0) & ~reserved_mask, addr); > writel(0, addr); > } > > -static void mt8192_power_off_sram(void __iomem *addr) > +static void scp_sram_power_off(void __iomem *addr, u32 reserved_mask) > { > int i; > > writel(0, addr); > for (i = 0; i < 32; i++) > - writel(GENMASK(i, 0), addr); > + writel(GENMASK(i, 0) & ~reserved_mask, addr); > } > > static int mt8192_scp_before_load(struct mtk_scp *scp) > @@ -391,11 +391,32 @@ static int mt8192_scp_before_load(struct mtk_scp *scp) > writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_SET); > > /* enable SRAM clock */ > - mt8192_power_on_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_0); > - mt8192_power_on_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_1); > - mt8192_power_on_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_2); > - mt8192_power_on_sram(scp->reg_base + MT8192_L1TCM_SRAM_PDN); > - mt8192_power_on_sram(scp->reg_base + MT8192_CPU0_SRAM_PD); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L1TCM_SRAM_PDN, 0); > + scp_sram_power_on(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > + > + /* enable MPU for all memory regions */ > + writel(0xff, scp->reg_base + MT8192_CORE0_MEM_ATT_PREDEF); > + > + return 0; > +} > + > +static int mt8195_scp_before_load(struct mtk_scp *scp) > +{ > + /* clear SPM interrupt, SCP2SPM_IPC_CLR */ > + writel(0xff, scp->reg_base + MT8192_SCP2SPM_IPC_CLR); > + > + writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_SET); > + > + /* enable SRAM clock */ > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L1TCM_SRAM_PDN, > + MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS); > + scp_sram_power_on(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > > /* enable MPU for all memory regions */ > writel(0xff, scp->reg_base + MT8192_CORE0_MEM_ATT_PREDEF); > @@ -551,11 +572,25 @@ static void mt8183_scp_stop(struct mtk_scp *scp) > static void mt8192_scp_stop(struct mtk_scp *scp) > { > /* Disable SRAM clock */ > - mt8192_power_off_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_0); > - mt8192_power_off_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_1); > - mt8192_power_off_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_2); > - mt8192_power_off_sram(scp->reg_base + MT8192_L1TCM_SRAM_PDN); > - mt8192_power_off_sram(scp->reg_base + MT8192_CPU0_SRAM_PD); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L1TCM_SRAM_PDN, 0); > + scp_sram_power_off(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > + > + /* Disable SCP watchdog */ > + writel(0, scp->reg_base + MT8192_CORE0_WDT_CFG); > +} > + > +static void mt8195_scp_stop(struct mtk_scp *scp) > +{ > + /* Disable SRAM clock */ > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L1TCM_SRAM_PDN, > + MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS); > + scp_sram_power_off(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > > /* Disable SCP watchdog */ > writel(0, scp->reg_base + MT8192_CORE0_WDT_CFG); > @@ -901,11 +936,11 @@ static const struct mtk_scp_of_data mt8192_of_data = { > > static const struct mtk_scp_of_data mt8195_of_data = { > .scp_clk_get = mt8195_scp_clk_get, > - .scp_before_load = mt8192_scp_before_load, > + .scp_before_load = mt8195_scp_before_load, > .scp_irq_handler = mt8192_scp_irq_handler, > .scp_reset_assert = mt8192_scp_reset_assert, > .scp_reset_deassert = mt8192_scp_reset_deassert, > - .scp_stop = mt8192_scp_stop, > + .scp_stop = mt8195_scp_stop, > .scp_da_to_va = mt8192_scp_da_to_va, > .host_to_scp_reg = MT8192_GIPC_IN_SET, > .host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT, > -- > 2.15.GIT > 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 CBED7C433EF for ; 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[68.147.0.187]) by smtp.gmail.com with ESMTPSA id oc3-20020a17090b1c0300b001bf8c88a8c4sm7321131pjb.35.2022.03.16.09.34.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Mar 2022 09:34:53 -0700 (PDT) Date: Wed, 16 Mar 2022 10:34:51 -0600 From: Mathieu Poirier To: Tinghan Shen Cc: Bjorn Andersson , Matthias Brugger , linux-remoteproc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, AngeloGioacchino Del Regno , Project_Global_Chrome_Upstream_Group@mediatek.com Subject: Re: [PATCH v4] remoteproc: mediatek: Fix side effect of mt8195 sram power on Message-ID: <20220316163451.GA2546942@p14s> References: <20220316031117.7311-1-tinghan.shen@mediatek.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220316031117.7311-1-tinghan.shen@mediatek.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220316_093457_154377_C7F9E63C X-CRM114-Status: GOOD ( 31.85 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Good morning, On Wed, Mar 16, 2022 at 11:11:17AM +0800, Tinghan Shen wrote: > The definition of L1TCM_SRAM_PDN bits on mt8195 is different to mt8192. > > L1TCM_SRAM_PDN bits[3:0] control the power of mt8195 L1TCM SRAM. > > L1TCM_SRAM_PDN bits[7:4] control the access path to EMI for SCP. > These bits have to be powered on to allow EMI access for SCP. > > Bits[7:4] also affect audio DSP because audio DSP and SCP are > placed on the same hardware bus. If SCP cannot access EMI, audio DSP is > blocked too. > > L1TCM_SRAM_PDN bits[31:8] are not used. > > This fix removes modification of bits[7:4] when power on/off mt8195 SCP > L1TCM. It's because the modification introduces a short period of time > blocking audio DSP to access EMI. This was not a problem until we have > to load both SCP module and audio DSP module. audio DSP needs to access > EMI because it has source/data on DRAM. Audio DSP will have unexpected > behavior when it accesses EMI and the SCP driver blocks the EMI path at > the same time. > > Fixes: 79111df414fc ("remoteproc: mediatek: Support mt8195 scp") > Signed-off-by: Tinghan Shen > Reviewed-by: AngeloGioacchino Del Regno > Reviewed-by: Matthias Brugger > --- > v4: add Fixes and Reviewed-by tags > v3: fix build error > v2: apply comments about macro definition and function calls > --- > drivers/remoteproc/mtk_common.h | 2 ++ > drivers/remoteproc/mtk_scp.c | 67 +++++++++++++++++++++++++++++++---------- > 2 files changed, 53 insertions(+), 16 deletions(-) > > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h > index 5ff3867c72f3..ff954a06637c 100644 > --- a/drivers/remoteproc/mtk_common.h > +++ b/drivers/remoteproc/mtk_common.h > @@ -51,6 +51,8 @@ > #define MT8192_CORE0_WDT_IRQ 0x10030 > #define MT8192_CORE0_WDT_CFG 0x10034 > > +#define MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS GENMASK(7, 4) > + > #define SCP_FW_VER_LEN 32 > #define SCP_SHARE_BUFFER_SIZE 288 > > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > index 36e48cf58ed6..5f686fe09203 100644 > --- a/drivers/remoteproc/mtk_scp.c > +++ b/drivers/remoteproc/mtk_scp.c > @@ -365,22 +365,22 @@ static int mt8183_scp_before_load(struct mtk_scp *scp) > return 0; > } > > -static void mt8192_power_on_sram(void __iomem *addr) > +static void scp_sram_power_on(void __iomem *addr, u32 reserved_mask) Why is @reserved_mask needed? It is not described in the changelong and as far as I can see in this patchset the parameter is always set to '0', which has no effect on the mask that gets generated. Thanks, Mathieu > { > int i; > > for (i = 31; i >= 0; i--) > - writel(GENMASK(i, 0), addr); > + writel(GENMASK(i, 0) & ~reserved_mask, addr); > writel(0, addr); > } > > -static void mt8192_power_off_sram(void __iomem *addr) > +static void scp_sram_power_off(void __iomem *addr, u32 reserved_mask) > { > int i; > > writel(0, addr); > for (i = 0; i < 32; i++) > - writel(GENMASK(i, 0), addr); > + writel(GENMASK(i, 0) & ~reserved_mask, addr); > } > > static int mt8192_scp_before_load(struct mtk_scp *scp) > @@ -391,11 +391,32 @@ static int mt8192_scp_before_load(struct mtk_scp *scp) > writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_SET); > > /* enable SRAM clock */ > - mt8192_power_on_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_0); > - mt8192_power_on_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_1); > - mt8192_power_on_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_2); > - mt8192_power_on_sram(scp->reg_base + MT8192_L1TCM_SRAM_PDN); > - mt8192_power_on_sram(scp->reg_base + MT8192_CPU0_SRAM_PD); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L1TCM_SRAM_PDN, 0); > + scp_sram_power_on(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > + > + /* enable MPU for all memory regions */ > + writel(0xff, scp->reg_base + MT8192_CORE0_MEM_ATT_PREDEF); > + > + return 0; > +} > + > +static int mt8195_scp_before_load(struct mtk_scp *scp) > +{ > + /* clear SPM interrupt, SCP2SPM_IPC_CLR */ > + writel(0xff, scp->reg_base + MT8192_SCP2SPM_IPC_CLR); > + > + writel(1, scp->reg_base + MT8192_CORE0_SW_RSTN_SET); > + > + /* enable SRAM clock */ > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_on(scp->reg_base + MT8192_L1TCM_SRAM_PDN, > + MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS); > + scp_sram_power_on(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > > /* enable MPU for all memory regions */ > writel(0xff, scp->reg_base + MT8192_CORE0_MEM_ATT_PREDEF); > @@ -551,11 +572,25 @@ static void mt8183_scp_stop(struct mtk_scp *scp) > static void mt8192_scp_stop(struct mtk_scp *scp) > { > /* Disable SRAM clock */ > - mt8192_power_off_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_0); > - mt8192_power_off_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_1); > - mt8192_power_off_sram(scp->reg_base + MT8192_L2TCM_SRAM_PD_2); > - mt8192_power_off_sram(scp->reg_base + MT8192_L1TCM_SRAM_PDN); > - mt8192_power_off_sram(scp->reg_base + MT8192_CPU0_SRAM_PD); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L1TCM_SRAM_PDN, 0); > + scp_sram_power_off(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > + > + /* Disable SCP watchdog */ > + writel(0, scp->reg_base + MT8192_CORE0_WDT_CFG); > +} > + > +static void mt8195_scp_stop(struct mtk_scp *scp) > +{ > + /* Disable SRAM clock */ > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_0, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_1, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L2TCM_SRAM_PD_2, 0); > + scp_sram_power_off(scp->reg_base + MT8192_L1TCM_SRAM_PDN, > + MT8195_L1TCM_SRAM_PDN_RESERVED_RSI_BITS); > + scp_sram_power_off(scp->reg_base + MT8192_CPU0_SRAM_PD, 0); > > /* Disable SCP watchdog */ > writel(0, scp->reg_base + MT8192_CORE0_WDT_CFG); > @@ -901,11 +936,11 @@ static const struct mtk_scp_of_data mt8192_of_data = { > > static const struct mtk_scp_of_data mt8195_of_data = { > .scp_clk_get = mt8195_scp_clk_get, > - .scp_before_load = mt8192_scp_before_load, > + .scp_before_load = mt8195_scp_before_load, > .scp_irq_handler = mt8192_scp_irq_handler, > .scp_reset_assert = mt8192_scp_reset_assert, > .scp_reset_deassert = mt8192_scp_reset_deassert, > - .scp_stop = mt8192_scp_stop, > + .scp_stop = mt8195_scp_stop, > .scp_da_to_va = mt8192_scp_da_to_va, > .host_to_scp_reg = MT8192_GIPC_IN_SET, > .host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT, > -- > 2.15.GIT > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel