From nobody Tue Feb 10 05:17:12 2026 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ADF6E1F419A; Wed, 5 Mar 2025 08:20:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.61.82.184 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741162862; cv=none; b=TCaaZA7ub4VWGbFkn6/cTo+2Q580S//JT4ejF/G7zx6vhb6t8JSR5TutULN8HyS0Zj/od0Msm07IZv4wwN6Ua9YNXFMZZo4DS/KaqMNcceW3XG+FyMqaIn04w9vI7rdMJVI8z9Y3iacZ5mlKIvklj7MW5mFJkYyZuDcynHECGHc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741162862; c=relaxed/simple; bh=stnMJykr8CsGdm4rH9EfY5R8rxlj95A3FNICHynjab8=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=OTgCf3mLIkgM0zq7YW5ZevSNVtf2wEVo8/NLy9rmEkt32iQfcIX2YLtDUWUPAhPQkXmA1Ne3S3cyJOVWv+YUjmWumGPw/M9QotmPaBP5YeRwPMqJQ07Nomqt0TKnQP1jxrxqrNm2DXdPUAzDJBkxh9F/fepOr8cXTNYwFVBIdkc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=uqbtiRlh; arc=none smtp.client-ip=210.61.82.184 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="uqbtiRlh" X-UUID: c13f4cbef99a11ef8eb9c36241bbb6fb-20250305 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=InaeS8/UkU8eLyrlVZZUnJa6Ghra5rWqfYuQwgP38JU=; b=uqbtiRlha3/mspW7E3V4bmvKL7LxQ8mQlrESBKYu9kwxiKWZ/PKyEbDtbwYSwASCr8RFXvK7KdApGC/eW4vO3Z4nSYWAuAr0dP1v+/mOwjJJB3Y5PGbz9s+GkAeHXHSsSTGmAnvXyzylthRb0I1+qBPoyMsyHID4Q4NgNRNgQVs=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.2.1,REQID:e07c6623-3531-4324-ba85-709338ae9a74,IP:0,UR L:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION:r elease,TS:0 X-CID-META: VersionHash:0ef645f,CLOUDID:43610bce-23b9-4c94-add0-e827a7999e28,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:81|82|102,TC:nil,Content:0|50,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,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: c13f4cbef99a11ef8eb9c36241bbb6fb-20250305 Received: from mtkmbs14n2.mediatek.inc [(172.21.101.76)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 2039444796; Wed, 05 Mar 2025 16:20:53 +0800 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; Wed, 5 Mar 2025 16:20:51 +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; Wed, 5 Mar 2025 16:20:51 +0800 From: Jjian Zhou To: Jassi Brar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , Jason-ch Chen , Jjian Zhou Subject: [PATCH RFC 1/3] mailbox: mediatek: Add mtk-vcp-mailbox driver Date: Wed, 5 Mar 2025 16:20:38 +0800 Message-ID: <20250305082047.15746-2-jjian.zhou@mediatek.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20250305082047.15746-1-jjian.zhou@mediatek.com> References: <20250305082047.15746-1-jjian.zhou@mediatek.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-MTK: N Content-Type: text/plain; charset="utf-8" Add mtk-vcp-mailbox driver to support the communication with VCP remote microprocessor. Signed-off-by: Jjian Zhou --- drivers/mailbox/Kconfig | 9 ++ drivers/mailbox/Makefile | 2 + drivers/mailbox/mtk-vcp-mailbox.c | 179 ++++++++++++++++++++++++ include/linux/mailbox/mtk-vcp-mailbox.h | 34 +++++ 4 files changed, 224 insertions(+) create mode 100644 drivers/mailbox/mtk-vcp-mailbox.c create mode 100644 include/linux/mailbox/mtk-vcp-mailbox.h diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index ed52db272f4d..ffc4a5491462 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -275,6 +275,15 @@ config MTK_CMDQ_MBOX critical time limitation, such as updating display configuration during the vblank. +config MTK_VCP_MBOX + tristate "MediaTek VCP Mailbox Support" + depends on ARCH_MEDIATEK || COMPILE_TEST + help + Say yes here to add support for the MediaTek VCP mailbox driver. + The mailbox implementation provides access from the application + processor to the MediaTek Video Processing Unit. + If unsure say N. + config ZYNQMP_IPI_MBOX tristate "Xilinx ZynqMP IPI Mailbox" depends on ARCH_ZYNQMP && OF diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 9a1542b55539..75a200a9d2d2 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -59,6 +59,8 @@ obj-$(CONFIG_MTK_ADSP_MBOX) +=3D mtk-adsp-mailbox.o obj-$(CONFIG_MTK_CMDQ_MBOX) +=3D mtk-cmdq-mailbox.o +obj-$(CONFIG_MTK_VCP_MBOX) +=3D mtk-vcp-mailbox.o + obj-$(CONFIG_ZYNQMP_IPI_MBOX) +=3D zynqmp-ipi-mailbox.o obj-$(CONFIG_SUN6I_MSGBOX) +=3D sun6i-msgbox.o diff --git a/drivers/mailbox/mtk-vcp-mailbox.c b/drivers/mailbox/mtk-vcp-ma= ilbox.c new file mode 100644 index 000000000000..fd7a123c71c8 --- /dev/null +++ b/drivers/mailbox/mtk-vcp-mailbox.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2025 MediaTek Corporation. All rights reserved. + * Author: Jjian Zhou + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct mtk_vcp_mbox_priv { + void __iomem *base; + struct device *dev; + struct mbox_controller mbox; + const struct mtk_vcp_mbox_cfg *cfg; + struct mtk_ipi_info ipi_recv; +}; + +struct mtk_vcp_mbox_cfg { + u32 set_in; + u32 clr_out; +}; + +static inline struct mtk_vcp_mbox_priv *get_mtk_vcp_mbox_priv(struct mbox_= controller *mbox) +{ + return container_of(mbox, struct mtk_vcp_mbox_priv, mbox); +} + +static irqreturn_t mtk_vcp_mbox_irq_thread(int irq, void *data) +{ + struct mbox_chan *chan =3D data; + struct mtk_vcp_mbox_priv *priv =3D get_mtk_vcp_mbox_priv(chan->mbox); + + /* get irq status */ + priv->ipi_recv.irq_status =3D readl(priv->base + priv->cfg->clr_out); + + __ioread32_copy(priv->ipi_recv.msg, priv->base, MAX_SLOT_NUM); + + mbox_chan_received_data(chan, &priv->ipi_recv); + + /* clear irq status */ + writel(priv->ipi_recv.irq_status, priv->base + priv->cfg->clr_out); + + return IRQ_HANDLED; +} + +static struct mbox_chan *mtk_vcp_mbox_xlate(struct mbox_controller *mbox, + const struct of_phandle_args *sp) +{ + if (sp->args_count) + return NULL; + + return mbox->chans; +} + +static int mtk_vcp_mbox_send_data(struct mbox_chan *chan, void *data) +{ + struct mtk_vcp_mbox_priv *priv =3D get_mtk_vcp_mbox_priv(chan->mbox); + struct mtk_ipi_info *ipi_info =3D data; + u32 status; + + if (!ipi_info->msg) { + dev_err(priv->dev, "msg buffer is NULL.\n"); + return -ENOMEM; + } + + status =3D readl(priv->base + priv->cfg->set_in) & BIT(ipi_info->index); + if (status) { + dev_err(priv->dev, "mailbox IPI %d is busy.\n", ipi_info->id); + return -EBUSY; + } + + if (ipi_info->slot_ofs + ipi_info->len > MBOX_SLOT_MAX_SIZE) + return -EINVAL; + __iowrite32_copy(priv->base + ipi_info->slot_ofs, ipi_info->msg, + ipi_info->len); + + writel(BIT(ipi_info->index), priv->base + priv->cfg->set_in); + + return 0; +} + +static bool mtk_vcp_mbox_last_tx_done(struct mbox_chan *chan) +{ + struct mtk_ipi_info *ipi_info =3D chan->active_req; + struct mtk_vcp_mbox_priv *priv =3D get_mtk_vcp_mbox_priv(chan->mbox); + u32 op; + + op =3D readl(priv->base + priv->cfg->set_in) & BIT(ipi_info->index); + return !op; +} + +static const struct mbox_chan_ops mtk_vcp_mbox_chan_ops =3D { + .send_data =3D mtk_vcp_mbox_send_data, + .last_tx_done =3D mtk_vcp_mbox_last_tx_done, +}; + +static int mtk_vcp_mbox_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct mtk_vcp_mbox_priv *priv; + struct mbox_controller *mbox; + int ret, irq; + + priv =3D devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev =3D dev; + mbox =3D &priv->mbox; + mbox->dev =3D dev; + mbox->ops =3D &mtk_vcp_mbox_chan_ops; + mbox->txdone_irq =3D false; + mbox->txdone_poll =3D true; + mbox->of_xlate =3D mtk_vcp_mbox_xlate; + mbox->num_chans =3D 1; + mbox->chans =3D devm_kzalloc(dev, sizeof(*mbox->chans), GFP_KERNEL); + if (!mbox->chans) + return -ENOMEM; + + priv->ipi_recv.msg =3D devm_kzalloc(dev, sizeof(u8) * MBOX_SLOT_MAX_SIZE, + GFP_KERNEL); + if (!priv->ipi_recv.msg) + return -ENOMEM; + + priv->base =3D devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + priv->cfg =3D of_device_get_match_data(dev); + if (!priv->cfg) + return -EINVAL; + + irq =3D platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret =3D devm_request_threaded_irq(dev, irq, NULL, + mtk_vcp_mbox_irq_thread, IRQF_ONESHOT, + dev_name(dev), mbox->chans); + if (ret < 0) + return ret; + + platform_set_drvdata(pdev, priv); + + dev_dbg(dev, "MTK VCP mailbox initialized\n"); + + return devm_mbox_controller_register(dev, &priv->mbox); +} + +static const struct mtk_vcp_mbox_cfg mt8196_cfg =3D { + .set_in =3D 0x100, + .clr_out =3D 0x10C, +}; + +static const struct of_device_id mtk_vcp_mbox_of_match[] =3D { + { .compatible =3D "mediatek,mt8196-vcp-mbox", .data =3D &mt8196_cfg }, + {}, +}; +MODULE_DEVICE_TABLE(of, mtk_vcp_mbox_of_match); + +static struct platform_driver mtk_vcp_mbox_driver =3D { + .probe =3D mtk_vcp_mbox_probe, + .driver =3D { + .name =3D "mtk_vcp_mbox", + .of_match_table =3D mtk_vcp_mbox_of_match, + }, +}; +module_platform_driver(mtk_vcp_mbox_driver); + +MODULE_AUTHOR("Jjian Zhou "); +MODULE_DESCRIPTION("MTK VCP Mailbox Controller"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mailbox/mtk-vcp-mailbox.h b/include/linux/mailbo= x/mtk-vcp-mailbox.h new file mode 100644 index 000000000000..953499b7cfeb --- /dev/null +++ b/include/linux/mailbox/mtk-vcp-mailbox.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */ +/* + * Copyright (c) 2024 MediaTek Inc. + */ + +#ifndef __MTK_VCP_MAILBOX_H__ +#define __MTK_VCP_MAILBOX_H__ + +#define MBOX_SLOT_MAX_SIZE 0x100 /* mbox max slot size */ +#define MAX_SLOT_NUM 64 + +/** + * struct mtk_ipi_info - channel table that belong to mtk_ipi_device + * @msg: The share buffer between IPC and mailbox driver + * @len: Message length + * @id: IPI number + * @recv_opt: Recv option, 0:receive ,1: response + * @index: The pin groups number of the mailbox channel + * @slot_ofs: Slot offset of the mailbox channel + * @irq_status: Indicate which pin groups triggered the interrupt + * + * It is used between IPC with mailbox driver. + */ +struct mtk_ipi_info { + void *msg; + u32 len; + u32 id; + u32 recv_opt; + u32 index; + u32 slot_ofs; + u32 irq_status; +}; + +#endif -- 2.45.2