From patchwork Wed Nov 20 06:36:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?RnJpZGF5IFlhbmcgKOadqOmYsyk=?= X-Patchwork-Id: 13880746 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 C2C62D6E2C9 for ; Wed, 20 Nov 2024 06:40:16 +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:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=plcGEKI++Y4M5i0ObDAzfA/yxlnBHw3L4k1yFF26Ipc=; b=NJe3WUBhjbdpl11qKgrEGDHGog gGfM43eJag0l2FBL5t2qqahIM3k9HOo4HewR/omHQbQ5ww0umW2ptPbNOy9HxmwnzX6pEFpYYidnG oOzsKU4zqyL/8M44mS0/mj2dEAl8CT80FTg4si2P9L4Kfh07UyB5xD+3OfUQx4Qo6RmeZmYd630Og UmlrT6ntp+PB8YBO9d/IXrYXwps2YVPfdNs/fL4IWxg3u5fXVadJlKoYSlzeLzHkElA2KCo9ce69d 5ZkmKWxRh5fHrxiJBnKgcs+LIaVceAUl/UZaxiFKZV4i9K/0r5atJq6Qmrx4XffqeSQWEUAPXP0Oy hlplkS7Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tDeNf-0000000EWoO-3eun; Wed, 20 Nov 2024 06:40:03 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tDeKx-0000000EVtq-1QYk; Wed, 20 Nov 2024 06:37:16 +0000 X-UUID: de046dc2a70911ef9048ed6ed365623b-20241119 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=plcGEKI++Y4M5i0ObDAzfA/yxlnBHw3L4k1yFF26Ipc=; b=GntvGOok19TGGPnsdEEMSPNCOlU0LfbteaLwxsz1CAqHL+eOXM6QvBz5qJGEAH6zwQhQ2WSljcQz7Ht6u3yCWSeSPg+5FcjowUcIuhs3IMh7bMsuMt7LRNVn5KYy9+l8ykV7F1lvhQSXIAedP+6YZ2cObbS1zMTmFlJ5hfxMYDw=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.44,REQID:79919a27-5c20-4f1f-95b2-56b6ac33843d,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:464815b,CLOUDID:1bf580a0-f395-4dfc-8188-ce2682df7fd8,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:81|82|102,TC:nil,Content:0,EDM:-3,IP :nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0, LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: de046dc2a70911ef9048ed6ed365623b-20241119 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1619425152; Tue, 19 Nov 2024 23:37:09 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 20 Nov 2024 14:37:06 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 20 Nov 2024 14:37:05 +0800 From: Friday Yang To: Yong Wu , Krzysztof Kozlowski , Rob Herring , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , Philipp Zabel CC: , , , , , Friday Yang Subject: [PATCH v2 2/2] memory: mtk-smi: mt8188: Add SMI clamp function Date: Wed, 20 Nov 2024 14:36:39 +0800 Message-ID: <20241120063701.8194-3-friday.yang@mediatek.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20241120063701.8194-1-friday.yang@mediatek.com> References: <20241120063701.8194-1-friday.yang@mediatek.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241119_223715_388673_669C2C45 X-CRM114-Status: GOOD ( 23.89 ) 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 In order to avoid handling glitch signal when MTCMOS on/off, SMI need clamp and reset operation. Parse power reset settings for LARBs which need to reset. Register genpd callback for SMI LARBs and apply reset operations in the callback. Signed-off-by: Friday Yang --- drivers/memory/mtk-smi.c | 175 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 171 insertions(+), 4 deletions(-) diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c index 2bc034dff691..c7119f655350 100644 --- a/drivers/memory/mtk-smi.c +++ b/drivers/memory/mtk-smi.c @@ -10,15 +10,21 @@ #include #include #include +#include #include #include #include #include +#include #include +#include +#include +#include #include #include #include #include +#include /* SMI COMMON */ #define SMI_L1LEN 0x100 @@ -36,6 +42,13 @@ #define SMI_DCM 0x300 #define SMI_DUMMY 0x444 +#define SMI_COMMON_CLAMP_EN 0x3c0 +#define SMI_COMMON_CLAMP_EN_SET 0x3c4 +#define SMI_COMMON_CLAMP_EN_CLR 0x3c8 +#define SMI_COMMON_CLAMP_MASK(inport) BIT(inport) + +#define SMI_SUB_COMM_INPORT_NR (8) + /* SMI LARB */ #define SMI_LARB_SLP_CON 0xc #define SLP_PROT_EN BIT(0) @@ -134,6 +147,7 @@ struct mtk_smi_larb_gen { unsigned int larb_direct_to_common_mask; unsigned int flags_general; const u8 (*ostd)[SMI_LARB_PORT_NR_MAX]; + const u8 *clamp_port; }; struct mtk_smi { @@ -150,6 +164,7 @@ struct mtk_smi { }; struct mtk_smi_larb { /* larb: local arbiter */ + struct device *dev; struct mtk_smi smi; void __iomem *base; struct device *smi_common_dev; /* common or sub-common dev */ @@ -157,6 +172,10 @@ struct mtk_smi_larb { /* larb: local arbiter */ int larbid; u32 *mmu; unsigned char *bank; + struct regmap *sub_comm_syscon; + u8 sub_comm_inport; + struct notifier_block nb; + struct reset_control *rst_con; }; static int @@ -377,6 +396,19 @@ static const u8 mtk_smi_larb_mt8195_ostd[][SMI_LARB_PORT_NR_MAX] = { [28] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,}, }; +static const u8 mtk_smi_larb_clamp_port_mt8188[] = { + [MT8188_SMI_RST_LARB10] = 1, + [MT8188_SMI_RST_LARB11A] = 2, + [MT8188_SMI_RST_LARB11C] = 3, + [MT8188_SMI_RST_LARB12] = 0, + [MT8188_SMI_RST_LARB11B] = 2, + [MT8188_SMI_RST_LARB15] = 1, + [MT8188_SMI_RST_LARB16B] = 2, + [MT8188_SMI_RST_LARB17B] = 3, + [MT8188_SMI_RST_LARB16A] = 2, + [MT8188_SMI_RST_LARB17A] = 3, +}; + static const struct mtk_smi_larb_gen mtk_smi_larb_mt2701 = { .port_in_larb = { LARB0_PORT_OFFSET, LARB1_PORT_OFFSET, @@ -423,6 +455,7 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt8188 = { .flags_general = MTK_SMI_FLAG_THRT_UPDATE | MTK_SMI_FLAG_SW_FLAG | MTK_SMI_FLAG_SLEEP_CTL | MTK_SMI_FLAG_CFG_PORT_SEC_CTL, .ostd = mtk_smi_larb_mt8188_ostd, + .clamp_port = mtk_smi_larb_clamp_port_mt8188, }; static const struct mtk_smi_larb_gen mtk_smi_larb_mt8192 = { @@ -472,6 +505,60 @@ static void mtk_smi_larb_sleep_ctrl_disable(struct mtk_smi_larb *larb) writel_relaxed(0, larb->base + SMI_LARB_SLP_CON); } +static int mtk_smi_larb_clamp_protect_enable(struct device *dev) +{ + struct mtk_smi_larb *larb = dev_get_drvdata(dev); + int ret; + + /* sub_comm_syscon could be NULL if larb directly linked to SMI common */ + if (!larb->sub_comm_syscon) + return -EINVAL; + + ret = regmap_write(larb->sub_comm_syscon, SMI_COMMON_CLAMP_EN_SET, + SMI_COMMON_CLAMP_MASK(larb->sub_comm_inport)); + if (ret) + dev_err(dev, "Unable to enable clamp, inport %d, ret %d\n", + larb->sub_comm_inport, ret); + + return ret; +} + +static int mtk_smi_larb_clamp_protect_disble(struct device *dev) +{ + struct mtk_smi_larb *larb = dev_get_drvdata(dev); + int ret; + + /* sub_comm_syscon could be NULL if larb directly linked to SMI common */ + if (!larb->sub_comm_syscon) + return -EINVAL; + + ret = regmap_write(larb->sub_comm_syscon, SMI_COMMON_CLAMP_EN_CLR, + SMI_COMMON_CLAMP_MASK(larb->sub_comm_inport)); + if (ret) + dev_err(dev, "Unable to disable clamp, inport %d, ret %d\n", + larb->sub_comm_inport, ret); + + return ret; +} + +static int mtk_smi_genpd_callback(struct notifier_block *nb, + unsigned long flags, void *data) +{ + struct mtk_smi_larb *larb = container_of(nb, struct mtk_smi_larb, nb); + struct device *dev = larb->dev; + + if (flags == GENPD_NOTIFY_PRE_ON || flags == GENPD_NOTIFY_PRE_OFF) { + /* disable related SMI sub-common port */ + mtk_smi_larb_clamp_protect_enable(dev); + } else if (flags == GENPD_NOTIFY_ON) { + /* enable related SMI sub-common port */ + reset_control_reset(larb->rst_con); + mtk_smi_larb_clamp_protect_disble(dev); + } + + return NOTIFY_OK; +} + static int mtk_smi_device_link_common(struct device *dev, struct device **com_dev) { struct platform_device *smi_com_pdev; @@ -528,6 +615,66 @@ static int mtk_smi_dts_clk_init(struct device *dev, struct mtk_smi *smi, return ret; } +static int mtk_smi_larb_parse_clamp_info(struct mtk_smi_larb *larb) +{ + struct device *dev = larb->dev; + const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen; + struct device_node *smi_node; + struct of_phandle_args args; + int ret, index; + + /* Only SMI LARBs located in camera and image subsys need to + * apply clamp and reset operation, others can be skipped. + */ + ret = of_parse_phandle_with_fixed_args(dev->of_node, + "resets", 1, 0, &args); + if (ret) + return 0; + + smi_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0); + if (!smi_node) + return -EINVAL; + + index = args.args[0]; + larb->sub_comm_inport = larb_gen->clamp_port[index]; + larb->sub_comm_syscon = device_node_to_regmap(smi_node); + of_node_put(smi_node); + + if (IS_ERR(larb->sub_comm_syscon) || + larb->sub_comm_inport >= SMI_SUB_COMM_INPORT_NR) { + larb->sub_comm_syscon = NULL; + return -EINVAL; + } + + return 0; +} + +static int mtk_smi_larb_parse_reset_info(struct mtk_smi_larb *larb) +{ + struct device *dev = larb->dev; + int ret; + + /* Only SMI LARBs located in camera and image subsys need to + * apply clamp and reset operation, others can be skipped. + */ + if (!of_find_property(dev->of_node, "resets", NULL)) + return 0; + + larb->rst_con = devm_reset_control_get(dev, "larb"); + if (IS_ERR(larb->rst_con)) + return dev_err_probe(dev, PTR_ERR(larb->rst_con), + "Can not get larb reset controller\n"); + + larb->nb.notifier_call = mtk_smi_genpd_callback; + ret = dev_pm_genpd_add_notifier(dev, &larb->nb); + if (ret) { + dev_err(dev, "Failed to add genpd callback %d\n", ret); + return -EINVAL; + } + + return 0; +} + static int mtk_smi_larb_probe(struct platform_device *pdev) { struct mtk_smi_larb *larb; @@ -538,6 +685,7 @@ static int mtk_smi_larb_probe(struct platform_device *pdev) if (!larb) return -ENOMEM; + larb->dev = dev; larb->larb_gen = of_device_get_match_data(dev); larb->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(larb->base)) @@ -554,15 +702,29 @@ static int mtk_smi_larb_probe(struct platform_device *pdev) if (ret < 0) return ret; - pm_runtime_enable(dev); + /* find sub common to clamp larb for ISP software reset */ + ret = mtk_smi_larb_parse_clamp_info(larb); + if (ret) { + dev_err(dev, "Failed to get clamp setting for larb\n"); + goto err_link_remove; + } + + ret = mtk_smi_larb_parse_reset_info(larb); + if (ret) { + dev_err(dev, "Failed to get power setting for larb\n"); + goto err_link_remove; + } + platform_set_drvdata(pdev, larb); ret = component_add(dev, &mtk_smi_larb_component_ops); if (ret) - goto err_pm_disable; + goto err_link_remove; + + pm_runtime_enable(dev); + return 0; -err_pm_disable: - pm_runtime_disable(dev); +err_link_remove: device_link_remove(dev, larb->smi_common_dev); return ret; } @@ -686,6 +848,10 @@ static const struct mtk_smi_common_plat mtk_smi_common_mt8188_vpp = { .init = mtk_smi_common_mt8195_init, }; +static const struct mtk_smi_common_plat mtk_smi_sub_common_mt8188 = { + .type = MTK_SMI_GEN2_SUB_COMM, +}; + static const struct mtk_smi_common_plat mtk_smi_common_mt8192 = { .type = MTK_SMI_GEN2, .has_gals = true, @@ -729,6 +895,7 @@ static const struct of_device_id mtk_smi_common_of_ids[] = { {.compatible = "mediatek,mt8186-smi-common", .data = &mtk_smi_common_mt8186}, {.compatible = "mediatek,mt8188-smi-common-vdo", .data = &mtk_smi_common_mt8188_vdo}, {.compatible = "mediatek,mt8188-smi-common-vpp", .data = &mtk_smi_common_mt8188_vpp}, + {.compatible = "mediatek,mt8188-smi-sub-common", .data = &mtk_smi_sub_common_mt8188}, {.compatible = "mediatek,mt8192-smi-common", .data = &mtk_smi_common_mt8192}, {.compatible = "mediatek,mt8195-smi-common-vdo", .data = &mtk_smi_common_mt8195_vdo}, {.compatible = "mediatek,mt8195-smi-common-vpp", .data = &mtk_smi_common_mt8195_vpp},