From patchwork Fri Feb 21 07:48:31 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Friday Yang X-Patchwork-Id: 13984938 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 EC41AC021B3 for ; Fri, 21 Feb 2025 07:53:19 +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=qQaDmPLgmLKJU2RGkP+s8KDAJyoBGEU+1cNzeAXZsmU=; b=PhMnj2L2w56HyVdBvphMAbAZSx wqAXxf15ebozH41Il3BLOr18sHZviYB0YdGoE9o1OiP0h7WXCavZ8BKWISHwtg5/BWttD2HiQ/Ik9 XquRX2s+sMZCbGM88Sobamia0i8AfjNvv2ti+1lIM/YuE5hxUZ0cCKsMtk4b6VAaT+F6jar6uu6kx Q9JZ+PDDL1pPDqStPGVAiu5/dj89K7pjHuWfuPUduKtEruOqhtbQbSOL4Kd7IVVQ9R5cil+1rErg7 fgk3L07rwIR5AqCz5X2FmREK8IgJdLJ26KJMa/sX5vDIT2tOzVggmMyo3S9t1JMRpAkR/V+UjxIzr 6K7adyWg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tlNqO-00000004aaG-1Nul; Fri, 21 Feb 2025 07:53:08 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tlNmM-00000004ZhR-28RO; Fri, 21 Feb 2025 07:48:59 +0000 X-UUID: 4c5fe6e0f02811efa1e849db4cc18d44-20250221 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=qQaDmPLgmLKJU2RGkP+s8KDAJyoBGEU+1cNzeAXZsmU=; b=Q7lFic++8vbeEwZ59ON9gBZGvKNXi4gdj8OYsIPmANHsCNPhBg/EJpNDw2ibJ6k6wyRI7pttmO+rR1+OuWfe4Se68tuztRy7g/UniVXfbDa7F4GKGD8ibJoDHwspDGJQzxzXBndEWD1iqpqcHoFPR9VsWiF8xge2My4jg+AImKc=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.46,REQID:800155df-788e-49eb-847b-76992b607806,IP:0,U RL:0,TC:0,Content:0,EDM:-25,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:60aa074,CLOUDID:06d01529-e0f8-414e-b8c3-b75c08217be8,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:81|82|102,TC:nil,Content:0|50,EDM:1| 19,IP:nil,URL:1,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,TF_CID_SPAM_ULS X-UUID: 4c5fe6e0f02811efa1e849db4cc18d44-20250221 Received: from mtkmbs09n2.mediatek.inc [(172.21.101.94)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1114910968; Fri, 21 Feb 2025 00:48:54 -0700 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by MTKMBS14N1.mediatek.inc (172.21.101.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.28; Fri, 21 Feb 2025 15:48:51 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1258.28 via Frontend Transport; Fri, 21 Feb 2025 15:48:50 +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 v4 1/2] dt-bindings: memory: mediatek: Add SMI reset and clamp for MT8188 Date: Fri, 21 Feb 2025 15:48:31 +0800 Message-ID: <20250221074846.14105-2-friday.yang@mediatek.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20250221074846.14105-1-friday.yang@mediatek.com> References: <20250221074846.14105-1-friday.yang@mediatek.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250220_234858_552183_C52549CF X-CRM114-Status: GOOD ( 14.86 ) 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 From: "Friday Yang" On the MediaTek platform, some SMI LARBs are directly connected to the SMI Common, while others are connected to the SMI Sub-Common, which in turn is connected to the SMI Common. The hardware block diagram can be described as follows. SMI-Common(Smart Multimedia Interface Common) | +----------------+------------------+ | | | | | | | | | | | | | | | larb0 SMI-Sub-Common0 SMI-Sub-Common1 | | | | | larb1 larb2 larb3 larb7 larb9 For previous discussion on the direction of the code modifications, please refer to: https://lore.kernel.org/all/CAFGrd9qZhObQXvm2_abqaX83xMLqxjQETB2= wXpobDWU1CnvkA@mail.gmail.com/ https://lore.kernel.org/all/CAPDyKFpokXV2gJDgowbixTvOH_5VL3B5H8ey hP+KJ5Fasm2rFg@mail.gmail.com/ On the MediaTek MT8188 SoC platform, we encountered power-off failures and SMI bus hang issues during camera stress tests. The issue arises because bus glitches are sometimes produced when MTCMOS powers on or off. While this is fairly normal, the software must handle these glitches to avoid mistaking them for transaction signals. What's more, this issue emerged only after the initial upstreaming of this binding. Without these patches, the SMI becomes unstable during camera stress tests. The software solutions can be summarized as follows: 1. Use CLAMP to disable the SMI sub-common port after turning off the LARB CG and before turning off the LARB MTCMOS. 2. Use CLAMP to disable/enable the SMI sub-common port. 3. Implement an AXI reset for SMI LARBs. This patch primarily add two changes: 1. Add compatible for SMI sub-common on MT8188 SoC. 2. Add 'resets' and 'reset-names' properties for SMI LARBs to support SMI reset operations. Signed-off-by: Friday Yang --- .../mediatek,smi-common.yaml | 2 ++ .../memory-controllers/mediatek,smi-larb.yaml | 20 +++++++++++++++++++ 2 files changed, 22 insertions(+) -- 2.46.0 diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml index 2f36ac23604c..4392d349878c 100644 --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml @@ -39,6 +39,7 @@ properties: - mediatek,mt8186-smi-common - mediatek,mt8188-smi-common-vdo - mediatek,mt8188-smi-common-vpp + - mediatek,mt8188-smi-sub-common - mediatek,mt8192-smi-common - mediatek,mt8195-smi-common-vdo - mediatek,mt8195-smi-common-vpp @@ -107,6 +108,7 @@ allOf: compatible: contains: enum: + - mediatek,mt8188-smi-sub-common - mediatek,mt8195-smi-sub-common then: required: diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml index 2381660b324c..2e86bb3455f9 100644 --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml @@ -69,6 +69,12 @@ properties: description: the hardware id of this larb. It's only required when this hardware id is not consecutive from its M4U point of view. + resets: + maxItems: 1 + + reset-names: + const: larb + required: - compatible - reg @@ -125,6 +131,20 @@ allOf: required: - mediatek,larb-id + - if: # only for image, camera and ipe subsys + properties: + compatible: + const: mediatek,mt8188-smi-larb + mediatek,larb-id: + oneOf: + - enum: + [ 9, 10, 11, 12, 13, 16, 17, 18, 19, 20 ] + + then: + required: + - resets + - reset-names + additionalProperties: false examples: