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Date: Mon, 16 Dec 2019 20:05:01 +0800
From: Yong Wu <yong.wu@...iatek.com>
To: Chao Hao <chao.hao@...iatek.com>
CC: Joerg Roedel <joro@...tes.org>, Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
<iommu@...ts.linux-foundation.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>, <wsd_upstream@...iatek.com>,
Jun Yan <jun.yan@...iatek.com>,
Cui Zhang <cui.zhang@...iatek.com>,
Guangming Cao <guangming.cao@...iatek.com>,
Anan Sun <anan.sun@...iatek.com>,
Miles Chen <miles.chen@...iatek.com>
Subject: Re: [RESEND,PATCH 01/13] dt-bindings: mediatek: Add bindings for
MT6779
On Mon, 2019-11-04 at 19:52 +0800, Chao Hao wrote:
> This patch adds description for MT6779 IOMMU.
>
> MT6779 has two iommus, they are MM_IOMMU and APU_IOMMU which
> use ARM Short-Descriptor translation format.
>
> The MT6779 IOMMU hardware diagram is as below, it is only a brief
> diagram about iommu, it don't focus on the part of smi_larb, so
> I don't describe the smi_larb detailedly.
>
> EMI
> |
> --------------------------------------
> | |
> MM_IOMMU APU_IOMMU
> | |
> SMI_COMMOM----------- APU_BUS
> | | |
> SMI_LARB(0~11) SMI_LARB12(FAKE) SMI_LARB13(FAKE)
> | | |
> | | --------------
> | | | | |
> Multimedia engine CCU VPU MDLA EMDA
>
> All the connections are hardware fixed, software can not adjust it.
>
> From the diagram above, MM_IOMMU provides mapping for multimedia engine,
> but CCU is connected with smi_common directly, we can take them as larb12.
> APU_IOMMU provides mapping for APU engine, we can take them larb13.
> Larb12 and Larb13 are fake larbs.
>
> Signed-off-by: Chao Hao <chao.hao@...iatek.com>
> ---
> .../bindings/iommu/mediatek,iommu.txt | 2 +
> include/dt-bindings/memory/mt6779-larb-port.h | 217 ++++++++++++++++++
> 2 files changed, 219 insertions(+)
> create mode 100644 include/dt-bindings/memory/mt6779-larb-port.h
>
> diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt b/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
> index ce59a505f5a4..c1ccd8582eb2 100644
> --- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
> +++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
> @@ -58,6 +58,7 @@ Required properties:
> - compatible : must be one of the following string:
> "mediatek,mt2701-m4u" for mt2701 which uses generation one m4u HW.
> "mediatek,mt2712-m4u" for mt2712 which uses generation two m4u HW.
> + "mediatek,mt6779-m4u" for mt6779 which uses generation two m4u HW.
> "mediatek,mt7623-m4u", "mediatek,mt2701-m4u" for mt7623 which uses
> generation one m4u HW.
> "mediatek,mt8173-m4u" for mt8173 which uses generation two m4u HW.
> @@ -78,6 +79,7 @@ Required properties:
> Specifies the mtk_m4u_id as defined in
> dt-binding/memory/mt2701-larb-port.h for mt2701, mt7623
> dt-binding/memory/mt2712-larb-port.h for mt2712,
> + dt-binding/memory/mt6779-larb-port.h for mt6779,
> dt-binding/memory/mt8173-larb-port.h for mt8173, and
> dt-binding/memory/mt8183-larb-port.h for mt8183.
>
> diff --git a/include/dt-bindings/memory/mt6779-larb-port.h b/include/dt-bindings/memory/mt6779-larb-port.h
> new file mode 100644
> index 000000000000..8b7f2d2446ea
> --- /dev/null
> +++ b/include/dt-bindings/memory/mt6779-larb-port.h
> @@ -0,0 +1,217 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2019 MediaTek Inc.
> + * Author: Chao Hao <chao.hao@...iatek.com>
> + */
> +
> +#ifndef _DTS_IOMMU_PORT_MT6779_H_
> +#define _DTS_IOMMU_PORT_MT6779_H_
> +
> +#define MTK_M4U_ID(larb, port) (((larb) << 5) | (port))
> +
> +#define M4U_LARB0_ID 0
> +#define M4U_LARB1_ID 1
> +#define M4U_LARB2_ID 2
> +#define M4U_LARB3_ID 3
> +#define M4U_LARB4_ID 4
> +#define M4U_LARB5_ID 5
> +#define M4U_LARB6_ID 6
> +#define M4U_LARB7_ID 7
> +#define M4U_LARB8_ID 8
> +#define M4U_LARB9_ID 9
> +#define M4U_LARB10_ID 10
> +#define M4U_LARB11_ID 11
> +#define M4U_LARB12_ID 12
> +#define M4U_LARB13_ID 13
> +
> +/* larb0 */
> +#define M4U_PORT_DISP_POSTMASK0 MTK_M4U_ID(M4U_LARB0_ID, 0)
> +#define M4U_PORT_DISP_OVL0_HDR MTK_M4U_ID(M4U_LARB0_ID, 1)
> +#define M4U_PORT_DISP_OVL1_HDR MTK_M4U_ID(M4U_LARB0_ID, 2)
> +#define M4U_PORT_DISP_OVL0 MTK_M4U_ID(M4U_LARB0_ID, 3)
> +#define M4U_PORT_DISP_OVL1 MTK_M4U_ID(M4U_LARB0_ID, 4)
> +#define M4U_PORT_DISP_PVRIC0 MTK_M4U_ID(M4U_LARB0_ID, 5)
> +#define M4U_PORT_DISP_RDMA0 MTK_M4U_ID(M4U_LARB0_ID, 6)
> +#define M4U_PORT_DISP_WDMA0 MTK_M4U_ID(M4U_LARB0_ID, 7)
> +#define M4U_PORT_DISP_FAKE0 MTK_M4U_ID(M4U_LARB0_ID, 8)
> +
> +/* larb1 */
> +#define M4U_PORT_DISP_OVL0_2L_HDR MTK_M4U_ID(M4U_LARB1_ID, 0)
> +#define M4U_PORT_DISP_OVL1_2L_HDR MTK_M4U_ID(M4U_LARB1_ID, 1)
> +#define M4U_PORT_DISP_OVL0_2L MTK_M4U_ID(M4U_LARB1_ID, 2)
> +#define M4U_PORT_DISP_OVL1_2L MTK_M4U_ID(M4U_LARB1_ID, 3)
> +#define M4U_PORT_DISP_RDMA1 MTK_M4U_ID(M4U_LARB1_ID, 4)
> +#define M4U_PORT_MDP_PVRIC0 MTK_M4U_ID(M4U_LARB1_ID, 5)
> +#define M4U_PORT_MDP_PVRIC1 MTK_M4U_ID(M4U_LARB1_ID, 6)
> +#define M4U_PORT_MDP_RDMA0 MTK_M4U_ID(M4U_LARB1_ID, 7)
> +#define M4U_PORT_MDP_RDMA1 MTK_M4U_ID(M4U_LARB1_ID, 8)
> +#define M4U_PORT_MDP_WROT0_R MTK_M4U_ID(M4U_LARB1_ID, 9)
> +#define M4U_PORT_MDP_WROT0_W MTK_M4U_ID(M4U_LARB1_ID, 10)
> +#define M4U_PORT_MDP_WROT1_R MTK_M4U_ID(M4U_LARB1_ID, 11)
> +#define M4U_PORT_MDP_WROT1_W MTK_M4U_ID(M4U_LARB1_ID, 12)
> +#define M4U_PORT_DISP_FAKE1 MTK_M4U_ID(M4U_LARB1_ID, 13)
> +
> +/* larb2-VDEC */
> +#define M4U_PORT_HW_VDEC_MC_EXT MTK_M4U_ID(M4U_LARB2_ID, 0)
> +#define M4U_PORT_HW_VDEC_UFO_EXT MTK_M4U_ID(M4U_LARB2_ID, 1)
> +#define M4U_PORT_HW_VDEC_PP_EXT MTK_M4U_ID(M4U_LARB2_ID, 2)
> +#define M4U_PORT_HW_VDEC_PRED_RD_EXT MTK_M4U_ID(M4U_LARB2_ID, 3)
> +#define M4U_PORT_HW_VDEC_PRED_WR_EXT MTK_M4U_ID(M4U_LARB2_ID, 4)
> +#define M4U_PORT_HW_VDEC_PPWRAP_EXT MTK_M4U_ID(M4U_LARB2_ID, 5)
> +#define M4U_PORT_HW_VDEC_TILE_EXT MTK_M4U_ID(M4U_LARB2_ID, 6)
> +#define M4U_PORT_HW_VDEC_VLD_EXT MTK_M4U_ID(M4U_LARB2_ID, 7)
> +#define M4U_PORT_HW_VDEC_VLD2_EXT MTK_M4U_ID(M4U_LARB2_ID, 8)
> +#define M4U_PORT_HW_VDEC_AVC_MV_EXT MTK_M4U_ID(M4U_LARB2_ID, 9)
> +#define M4U_PORT_HW_VDEC_UFO_ENC_EXT MTK_M4U_ID(M4U_LARB2_ID, 10)
> +#define M4U_PORT_HW_VDEC_RG_CTRL_DMA_EXT MTK_M4U_ID(M4U_LARB2_ID, 11)
> +
> +/*larb3-VENC*/
Normally add space before and after the word. Like: /* larb3-VENC */
below are the same.
> +#define M4U_PORT_VENC_RCPU MTK_M4U_ID(M4U_LARB3_ID, 0)
> +#define M4U_PORT_VENC_REC MTK_M4U_ID(M4U_LARB3_ID, 1)
> +#define M4U_PORT_VENC_BSDMA MTK_M4U_ID(M4U_LARB3_ID, 2)
> +#define M4U_PORT_VENC_SV_COMV MTK_M4U_ID(M4U_LARB3_ID, 3)
> +#define M4U_PORT_VENC_RD_COMV MTK_M4U_ID(M4U_LARB3_ID, 4)
> +#define M4U_PORT_VENC_NBM_RDMA MTK_M4U_ID(M4U_LARB3_ID, 5)
> +#define M4U_PORT_VENC_NBM_RDMA_LITE MTK_M4U_ID(M4U_LARB3_ID, 6)
> +#define M4U_PORT_JPGENC_Y_RDMA MTK_M4U_ID(M4U_LARB3_ID, 7)
> +#define M4U_PORT_JPGENC_C_RDMA MTK_M4U_ID(M4U_LARB3_ID, 8)
> +#define M4U_PORT_JPGENC_Q_TABLE MTK_M4U_ID(M4U_LARB3_ID, 9)
> +#define M4U_PORT_JPGENC_BSDMA MTK_M4U_ID(M4U_LARB3_ID, 10)
> +#define M4U_PORT_JPGDEC_WDMA MTK_M4U_ID(M4U_LARB3_ID, 11)
> +#define M4U_PORT_JPGDEC_BSDMA MTK_M4U_ID(M4U_LARB3_ID, 12)
> +#define M4U_PORT_VENC_NBM_WDMA MTK_M4U_ID(M4U_LARB3_ID, 13)
> +#define M4U_PORT_VENC_NBM_WDMA_LITE MTK_M4U_ID(M4U_LARB3_ID, 14)
> +#define M4U_PORT_VENC_CUR_LUMA MTK_M4U_ID(M4U_LARB3_ID, 15)
> +#define M4U_PORT_VENC_CUR_CHROMA MTK_M4U_ID(M4U_LARB3_ID, 16)
> +#define M4U_PORT_VENC_REF_LUMA MTK_M4U_ID(M4U_LARB3_ID, 17)
> +#define M4U_PORT_VENC_REF_CHROMA MTK_M4U_ID(M4U_LARB3_ID, 18)
> +
> +/*larb4-dummy*/
> +
> +/*larb5-IMG*/
[snip]
> +
> +#define M4U_PORT_VPU MTK_M4U_ID(M4U_LARB13_ID, 0)
> +#define M4U_PORT_MDLA MTK_M4U_ID(M4U_LARB13_ID, 1)
> +#define M4U_PORT_EDMA MTK_M4U_ID(M4U_LARB13_ID, 2)
> +
> +#define M4U_PORT_UNKNOWN (M4U_PORT_EDMA + 1)
When do you need this UNKNOWN one? The other SoC doesn't have it. Please
remove if it is unnecessary.
> +
> +#endif
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