[PATCH v5, 13/15] dt-bindings: media: mtk-vcodec: Adds decoder dt-bindings for mt8192
yunfei.dong at mediatek.com
yunfei.dong at mediatek.com
Mon Aug 16 20:50:52 PDT 2021
Hi Laurent,
Thanks for your detail suggestion.
On Wed, 2021-08-11 at 20:59 +0300, Laurent Pinchart wrote:
> Hi Yunfei,
>
> Thank you for the patch.
>
> On Wed, Aug 11, 2021 at 10:57:59AM +0800, Yunfei Dong wrote:
> > Adds decoder dt-bindings for mt8192.
> >
> > Signed-off-by: Yunfei Dong <yunfei.dong at mediatek.com>
> > ---
> > v5: no changes
> >
> > This patch depends on "Mediatek MT8192 clock support"[1].
> >
> > The definition of decoder clocks are in mt8192-clk.h, need to
> > include them in case of build fail [1].
> >
> > [1]
> > https://patchwork.kernel.org/project/linux-mediatek/list/?series=511175
> > ---
> > .../media/mediatek,vcodec-comp-decoder.yaml | 172
> > ++++++++++++++++++
> > 1 file changed, 172 insertions(+)
> > create mode 100644
> > Documentation/devicetree/bindings/media/mediatek,vcodec-comp-
> > decoder.yaml
> >
> > diff --git
> > a/Documentation/devicetree/bindings/media/mediatek,vcodec-comp-
> > decoder.yaml
> > b/Documentation/devicetree/bindings/media/mediatek,vcodec-comp-
> > decoder.yaml
> > new file mode 100644
> > index 000000000000..083c89933917
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-comp-
> > decoder.yaml
> > @@ -0,0 +1,172 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id:
> > http://devicetree.org/schemas/iommu/mediatek,vcodec-comp-decoder.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Mediatek Video Decode Accelerator With Component
> > +
> > +maintainers:
> > + - Yunfei Dong <yunfei.dong at mediatek.com>
> > +
> > +description: |+
> > + Mediatek Video Decode is the video decode hardware present in
> > Mediatek
> > + SoCs which supports high resolution decoding functionalities.
> > Required
> > + master and component node.
>
> This should explain how the three IP cores relate to each other.
>
I will explain it in next patch.
> > +
> > +properties:
> > + compatible:
> > + oneOf:
> > + - enum:
> > + - mediatek,mt8192-vcodec-dec # for lat hardware
> > + - mediatek,mtk-vcodec-lat # for core hardware
> > + - mediatek,mtk-vcodec-core
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + interrupts:
> > + maxItems: 1
> > +
> > + clocks:
> > + maxItems: 5
> > +
> > + clock-names:
> > + items:
> > + - const: vdec-sel
> > + - const: vdec-soc-vdec
> > + - const: vdec-soc-lat
> > + - const: vdec-vdec
> > + - const: vdec-top
> > +
> > + assigned-clocks: true
> > +
> > + assigned-clock-parents: true
> > +
> > + power-domains:
> > + 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.
> > +
> > + dma-ranges:
> > + maxItems: 1
> > + description: |
> > + Describes the physical address space of IOMMU maps to
> > memory.
> > +
> > + mediatek,scp:
> > + $ref: /schemas/types.yaml#/definitions/phandle
> > + maxItems: 1
> > + description:
> > + Describes point to scp.
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - iommus
> > + - dma-ranges
> > +
> > +allOf:
> > + - if: #master node
> > + properties:
> > + compatible:
> > + contains:
> > + enum:
> > + - mediatek,mt8192-vcodec-dec # for lat hardware
> > +
> > + then:
> > + required:
> > + - mediatek,scp
> > +
> > + - if: #component node
> > + properties:
> > + compatible:
> > + contains:
> > + enum:
> > + - mediatek,mtk-vcodec-lat # for core hardware
> > + - mediatek,mtk-vcodec-core
> > +
> > + then:
> > + required:
> > + - interrupts
> > + - clocks
> > + - clock-names
> > + - assigned-clocks
> > + - assigned-clock-parents
> > + - power-domains
> > +
> > +
> > +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>
> > +
> > + vcodec_dec: vcodec_dec at 16000000 {
> > + compatible = "mediatek,mt8192-vcodec-dec";
> > + reg = <0 0x16000000 0 0x1000>; /* VDEC_SYS */
> > + mediatek,scp = <&scp>;
> > + iommus = <&iommu0 M4U_PORT_L4_VDEC_MC_EXT>;
> > + dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
> > + };
> > +
> > + vcodec_lat: vcodec_lat at 0x16010000 {
> > + compatible = "mediatek,mtk-vcodec-lat";
> > + reg = <0 0x16010000 0 0x800>; /* VDEC_MISC */
> > + 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>;
> > + dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
> > + 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 = "vdec-sel", "vdec-soc-vdec", "vdec-soc-lat",
> > + "vdec-vdec", "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: vcodec_core at 0x16025000 {
> > + compatible = "mediatek,mtk-vcodec-core";
> > + reg = <0 0x16025000 0 0x1000>; /*
> > VDEC_CORE_MISC */
> > + 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>;
> > + dma-ranges = <0x1 0x0 0x0 0x40000000 0x0 0xfff00000>;
> > + 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 = "vdec-sel", "vdec-soc-vdec", "vdec-soc-lat",
> > + "vdec-vdec", "vdec-top";
> > + assigned-clocks = <&topckgen CLK_TOP_VDEC_SEL>;
> > + assigned-clock-parents = <&topckgen CLK_TOP_MAINPLL_D4>;
> > + power-domains = <&spm MT8192_POWER_DOMAIN_VDEC2>;
> > + };
>
> I'm a bit late in the game, reviewing v5 only, but I'm wondering if
> those IP cores need to be modelled in separate nodes. It would be
> much
> easier, from a software point of view, to have a single node, with
> multiple register ranges.
>
> Are some of those IP cores used in different SoCs, combined in
> different
> ways, that make a modular design better ?
>
Different platform has different hardware, for mt8192 only has three
nodes. but mt8195 will has five nodes. and the clk/power/irq/iommu are
different. It is not easy to manage all hardware at the same time in
one node, need to enable different hardware at the same time, the logic
will be very complex.
It is much easier to handle different hardware using component, enable
different hardware when we need it.
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