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Message-ID: <CAC-pXoNYXSoL0L8OEoVg+tU1JoMU5VU-voXNKQD1is0HBYmT_A@mail.gmail.com>
Date: Thu, 9 Dec 2021 15:57:22 -0800
From: Steve Cho <stevecho@...omium.org>
To: Yunfei Dong <yunfei.dong@...iatek.com>
Cc: Alexandre Courbot <acourbot@...omium.org>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
Tzung-Bi Shih <tzungbi@...omium.org>,
Tiffany Lin <tiffany.lin@...iatek.com>,
Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Tomasz Figa <tfiga@...gle.com>,
Hsin-Yi Wang <hsinyi@...omium.org>,
Fritz Koenig <frkoenig@...omium.org>,
Dafna Hirschfeld <dafna.hirschfeld@...labora.com>,
Benjamin Gaignard <benjamin.gaignard@...labora.com>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel <dri-devel@...ts.freedesktop.org>,
Irui Wang <irui.wang@...iatek.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
linux-media@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
srv_heupstream@...iatek.com, linux-mediatek@...ts.infradead.org,
Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v12, 15/19] dt-bindings: media: mtk-vcodec: Adds decoder
dt-bindings for mt8192
Reviewed-by: Steve Cho <stevecho@...omium.org>
On Wed, Dec 1, 2021 at 7:46 PM Yunfei Dong <yunfei.dong@...iatek.com> wrote:
>
> Adds decoder dt-bindings for mt8192.
basic question: what is dt-bindings?
Is this yaml file supposed to be used for some settings?
>
> Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> ---
> .../media/mediatek,vcodec-subdev-decoder.yaml | 266 ++++++++++++++++++
> 1 file changed, 266 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
>
> diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
> new file mode 100644
> index 000000000000..67cbcf8b3373
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-subdev-decoder.yaml
> @@ -0,0 +1,266 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/media/mediatek,vcodec-subdev-decoder.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Mediatek Video Decode Accelerator With Multi Hardware
Is Multi Hardware supposed to mean parent & child devices in this context?
> +
> +maintainers:
> + - Yunfei Dong <yunfei.dong@...iatek.com>
> +
> +description: |
> + Mediatek Video Decode is the video decode hardware present in Mediatek
> + SoCs which supports high resolution decoding functionalities. Required
> + parent and child device node.
> +
> + About the Decoder Hardware Block Diagram, please check below:
Great to see this diagram and description!
> +
> + +---------------------------------+------------------------------------+
> + | | |
> + | input -> lat HW -> lat buffer --|--> lat buffer -> core HW -> output |
> + | || | || |
> + +------------||-------------------+---------------------||-------------+
> + lat workqueue | core workqueue <parent>
> + -------------||-----------------------------------------||------------------
> + || || <child>
> + \/ <----------------HW index-------------->\/
> + +------------------------------------------------------+
> + | enable/disable |
> + | clk power irq iommu |
> + | (lat/lat soc/core0/core1) |
> + +------------------------------------------------------+
> +
> + As above, there are parent and child devices, child mean each hardware. The child device
> + controls the information of each hardware independent which include clk/power/irq.
> +
> + There are two workqueues in parent device: lat workqueue and core workqueue. They are used
> + to lat and core hardware deocder. Lat workqueue need to get input bitstream and lat buffer,
> + then enable lat to decode, writing the result to lat buffer, dislabe hardware when lat decode
> + done. Core workqueue need to get lat buffer and output buffer, then enable core to decode,
> + writing the result to output buffer, disable hardware when core decode done. These two
> + hardwares will decode each frame cyclically.
> +
> + For the smi common may not the same for each hardware, can't combine all hardware in one node,
> + or leading to iommu fault when access dram data.
> +
> +properties:
> + compatible:
> + const: mediatek,mt8192-vcodec-dec
> +
> + reg:
> + maxItems: 1
> +
> + iommus:
> + minItems: 1
> + maxItems: 32
> + description: |
> + List of the hardware port in respective IOMMU block for current Socs.
> + Refer to bindings/iommu/mediatek,iommu.yaml.
> +
> + mediatek,scp:
> + $ref: /schemas/types.yaml#/definitions/phandle
> + maxItems: 1
> + description: |
> + The node of system control processor (SCP), using
> + the remoteproc & rpmsg framework.
> + $ref: /schemas/remoteproc/mtk,scp.yaml
> +
> + dma-ranges:
> + maxItems: 1
> + description: |
> + Describes the physical address space of IOMMU maps to memory.
> +
> + "#address-cells":
> + const: 1
> +
> + "#size-cells":
> + const: 1
> +
> + ranges: true
> +
> +# Required child node:
> +patternProperties:
> + vcodec-lat:
> + type: object
> +
> + properties:
> + compatible:
> + const: mediatek,mtk-vcodec-lat
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + iommus:
> + minItems: 1
> + maxItems: 32
> + description: |
> + List of the hardware port in respective IOMMU block for current Socs.
> + Refer to bindings/iommu/mediatek,iommu.yaml.
> +
> + clocks:
> + maxItems: 5
> +
> + clock-names:
> + items:
> + - const: sel
> + - const: soc-vdec
> + - const: soc-lat
> + - const: vdec
> + - const: top
> +
> + assigned-clocks:
> + maxItems: 1
> +
> + assigned-clock-parents:
> + maxItems: 1
> +
> + power-domains:
> + maxItems: 1
> +
> + required:
> + - compatible
> + - reg
> + - interrupts
> + - iommus
> + - clocks
> + - clock-names
> + - assigned-clocks
> + - assigned-clock-parents
> + - power-domains
> +
> + additionalProperties: false
> +
> + vcodec-core:
> + type: object
> +
> + properties:
> + compatible:
> + const: mediatek,mtk-vcodec-core
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + iommus:
> + minItems: 1
> + maxItems: 32
> + description: |
> + List of the hardware port in respective IOMMU block for current Socs.
> + Refer to bindings/iommu/mediatek,iommu.yaml.
> +
> + clocks:
> + maxItems: 5
> +
> + clock-names:
> + items:
> + - const: sel
> + - const: soc-vdec
> + - const: soc-lat
> + - const: vdec
> + - const: top
> +
> + assigned-clocks:
> + maxItems: 1
> +
> + assigned-clock-parents:
> + maxItems: 1
> +
> + power-domains:
> + maxItems: 1
> +
> + required:
> + - compatible
> + - reg
> + - interrupts
> + - iommus
> + - clocks
> + - clock-names
> + - assigned-clocks
> + - assigned-clock-parents
> + - power-domains
> +
> + additionalProperties: false
> +
> +required:
> + - compatible
> + - reg
> + - iommus
> + - mediatek,scp
> + - dma-ranges
> + - ranges
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/memory/mt8192-larb-port.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/clock/mt8192-clk.h>
> + #include <dt-bindings/power/mt8192-power.h>
> +
> + video-codec@...00000 {
> + compatible = "mediatek,mt8192-vcodec-dec";
> + mediatek,scp = <&scp>;
> + iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>;
> + dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges = <0 0x16000000 0x40000>;
> + reg = <0x16000000 0x1000>; /* VDEC_SYS */
> + vcodec-lat@...00 {
> + compatible = "mediatek,mtk-vcodec-lat";
> + reg = <0x10000 0x800>;
> + interrupts = <GIC_SPI 426 IRQ_TYPE_LEVEL_HIGH 0>;
> + iommus = <&iommu0 M4U_PORT_L5_VDEC_LAT0_VLD_EXT>,
> + <&iommu0 M4U_PORT_L5_VDEC_LAT0_VLD2_EXT>,
> + <&iommu0 M4U_PORT_L5_VDEC_LAT0_AVC_MV_EXT>,
> + <&iommu0 M4U_PORT_L5_VDEC_LAT0_PRED_RD_EXT>,
> + <&iommu0 M4U_PORT_L5_VDEC_LAT0_TILE_EXT>,
> + <&iommu0 M4U_PORT_L5_VDEC_LAT0_WDMA_EXT>,
> + <&iommu0 M4U_PORT_L5_VDEC_LAT0_RG_CTRL_DMA_EXT>,
> + <&iommu0 M4U_PORT_L5_VDEC_UFO_ENC_EXT>;
> + clocks = <&topckgen CLK_TOP_VDEC_SEL>,
> + <&vdecsys_soc CLK_VDEC_SOC_VDEC>,
> + <&vdecsys_soc CLK_VDEC_SOC_LAT>,
> + <&vdecsys_soc CLK_VDEC_SOC_LARB1>,
> + <&topckgen CLK_TOP_MAINPLL_D4>;
> + clock-names = "sel", "soc-vdec", "soc-lat", "vdec", "top";
> + assigned-clocks = <&topckgen CLK_TOP_VDEC_SEL>;
> + assigned-clock-parents = <&topckgen CLK_TOP_MAINPLL_D4>;
> + power-domains = <&spm MT8192_POWER_DOMAIN_VDEC>;
> + };
> +
> + vcodec-core@...00 {
> + compatible = "mediatek,mtk-vcodec-core";
> + reg = <0x25000 0x1000>;
> + interrupts = <GIC_SPI 425 IRQ_TYPE_LEVEL_HIGH 0>;
> + iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_UFO_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_PP_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_PRED_RD_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_PRED_WR_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_PPWRAP_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_TILE_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_VLD_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_VLD2_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_AVC_MV_EXT>,
> + <&iommu0 M4U_PORT_L4_VDEC_RG_CTRL_DMA_EXT>;
> + clocks = <&topckgen CLK_TOP_VDEC_SEL>,
> + <&vdecsys CLK_VDEC_VDEC>,
> + <&vdecsys CLK_VDEC_LAT>,
> + <&vdecsys CLK_VDEC_LARB1>,
> + <&topckgen CLK_TOP_MAINPLL_D4>;
> + clock-names = "sel", "soc-vdec", "soc-lat", "vdec", "top";
> + assigned-clocks = <&topckgen CLK_TOP_VDEC_SEL>;
> + assigned-clock-parents = <&topckgen CLK_TOP_MAINPLL_D4>;
> + power-domains = <&spm MT8192_POWER_DOMAIN_VDEC2>;
> + };
> + };
> --
> 2.25.1
>
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