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    SubjectRe: [PATCH v4 01/17] media: dt-binding: mtk-vcodec: Separating mtk-vcodec encode node.
    On Wed, Jun 10, 2020 at 6:21 AM Rob Herring <robh@kernel.org> wrote:
    >
    > On Sat, May 30, 2020 at 04:10:02PM +0800, Yong Wu wrote:
    > > From: Maoguang Meng <maoguang.meng@mediatek.com>
    > >
    > > Update binding document since the avc and vp8 hardware encoder in
    > > mt8173 are now separated. Separate "mediatek,mt8173-vcodec-enc" to
    > > "mediatek,mt8173-vcodec-vp8-enc" and "mediatek,mt8173-vcodec-avc-enc".
    >
    > The h/w suddenly split in 2? You are breaking compatibility. Up to the
    > Mediatek maintainers to decide if that's okay, but you need to state you
    > are breaking compatibility (here and in the driver) and why that is
    > okay.

    In my understanding there is no real hardware using the old bindings
    at the moment, and the split is indeed a reflection of the actual
    hardware layout. Tiffany, can you give your acked-by if this change is
    ok with you?

    >
    > >
    > > This is a preparing patch for smi cleaning up "mediatek,larb".
    > >
    > > Signed-off-by: Maoguang Meng <maoguang.meng@mediatek.com>
    > > Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
    > > Signed-off-by: Irui Wang <irui.wang@mediatek.com>
    > > Signed-off-by: Yong Wu <yong.wu@mediatek.com>
    > > ---
    > > .../devicetree/bindings/media/mediatek-vcodec.txt | 58 ++++++++++++----------
    > > 1 file changed, 31 insertions(+), 27 deletions(-)
    > >
    > > diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
    > > index 8093335..1023740 100644
    > > --- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
    > > +++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
    > > @@ -4,7 +4,9 @@ Mediatek Video Codec is the video codec hw present in Mediatek SoCs which
    > > supports high resolution encoding and decoding functionalities.
    > >
    > > Required properties:
    > > -- compatible : "mediatek,mt8173-vcodec-enc" for MT8173 encoder
    > > +- compatible : must be one of the following string:
    > > + "mediatek,mt8173-vcodec-vp8-enc" for mt8173 vp8 encoder.
    > > + "mediatek,mt8173-vcodec-avc-enc" for mt8173 avc encoder.
    > > "mediatek,mt8183-vcodec-enc" for MT8183 encoder.
    > > "mediatek,mt8173-vcodec-dec" for MT8173 decoder.
    > > - reg : Physical base address of the video codec registers and length of
    > > @@ -13,10 +15,11 @@ Required properties:
    > > - mediatek,larb : must contain the local arbiters in the current Socs.
    > > - clocks : list of clock specifiers, corresponding to entries in
    > > the clock-names property.
    > > -- clock-names: encoder must contain "venc_sel_src", "venc_sel",,
    > > - "venc_lt_sel_src", "venc_lt_sel", decoder must contain "vcodecpll",
    > > - "univpll_d2", "clk_cci400_sel", "vdec_sel", "vdecpll", "vencpll",
    > > - "venc_lt_sel", "vdec_bus_clk_src".
    > > +- clock-names:
    > > + avc venc must contain "venc_sel";
    > > + vp8 venc must contain "venc_lt_sel";
    > > + decoder must contain "vcodecpll", "univpll_d2", "clk_cci400_sel",
    > > + "vdec_sel", "vdecpll", "vencpll", "venc_lt_sel", "vdec_bus_clk_src".
    > > - iommus : should point to the respective IOMMU block with master port as
    > > argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
    > > for details.
    > > @@ -80,14 +83,10 @@ vcodec_dec: vcodec@16000000 {
    > > assigned-clock-rates = <0>, <0>, <0>, <1482000000>, <800000000>;
    > > };
    > >
    > > - vcodec_enc: vcodec@18002000 {
    > > - compatible = "mediatek,mt8173-vcodec-enc";
    > > - reg = <0 0x18002000 0 0x1000>, /*VENC_SYS*/
    > > - <0 0x19002000 0 0x1000>; /*VENC_LT_SYS*/
    > > - interrupts = <GIC_SPI 198 IRQ_TYPE_LEVEL_LOW>,
    > > - <GIC_SPI 202 IRQ_TYPE_LEVEL_LOW>;
    > > - mediatek,larb = <&larb3>,
    > > - <&larb5>;
    > > +vcodec_enc: vcodec@18002000 {
    > > + compatible = "mediatek,mt8173-vcodec-avc-enc";
    > > + reg = <0 0x18002000 0 0x1000>;
    > > + interrupts = <GIC_SPI 198 IRQ_TYPE_LEVEL_LOW>;
    > > iommus = <&iommu M4U_PORT_VENC_RCPU>,
    > > <&iommu M4U_PORT_VENC_REC>,
    > > <&iommu M4U_PORT_VENC_BSDMA>,
    > > @@ -98,8 +97,20 @@ vcodec_dec: vcodec@16000000 {
    > > <&iommu M4U_PORT_VENC_REF_LUMA>,
    > > <&iommu M4U_PORT_VENC_REF_CHROMA>,
    > > <&iommu M4U_PORT_VENC_NBM_RDMA>,
    > > - <&iommu M4U_PORT_VENC_NBM_WDMA>,
    > > - <&iommu M4U_PORT_VENC_RCPU_SET2>,
    > > + <&iommu M4U_PORT_VENC_NBM_WDMA>;
    > > + mediatek,larb = <&larb3>;
    > > + mediatek,vpu = <&vpu>;
    > > + clocks = <&topckgen CLK_TOP_VENC_SEL>;
    > > + clock-names = "venc_sel";
    > > + assigned-clocks = <&topckgen CLK_TOP_VENC_SEL>;
    > > + assigned-clock-parents = <&topckgen CLK_TOP_VCODECPLL>;
    > > + };
    > > +
    > > +vcodec_enc_lt: vcodec@19002000 {
    > > + compatible = "mediatek,mt8173-vcodec-vp8-enc";
    > > + reg = <0 0x19002000 0 0x1000>; /* VENC_LT_SYS */
    > > + interrupts = <GIC_SPI 202 IRQ_TYPE_LEVEL_LOW>;
    > > + iommus = <&iommu M4U_PORT_VENC_RCPU_SET2>,
    > > <&iommu M4U_PORT_VENC_REC_FRM_SET2>,
    > > <&iommu M4U_PORT_VENC_BSDMA_SET2>,
    > > <&iommu M4U_PORT_VENC_SV_COMA_SET2>,
    > > @@ -108,17 +119,10 @@ vcodec_dec: vcodec@16000000 {
    > > <&iommu M4U_PORT_VENC_CUR_CHROMA_SET2>,
    > > <&iommu M4U_PORT_VENC_REF_LUMA_SET2>,
    > > <&iommu M4U_PORT_VENC_REC_CHROMA_SET2>;
    > > + mediatek,larb = <&larb5>;
    > > mediatek,vpu = <&vpu>;
    > > - clocks = <&topckgen CLK_TOP_VENCPLL_D2>,
    > > - <&topckgen CLK_TOP_VENC_SEL>,
    > > - <&topckgen CLK_TOP_UNIVPLL1_D2>,
    > > - <&topckgen CLK_TOP_VENC_LT_SEL>;
    > > - clock-names = "venc_sel_src",
    > > - "venc_sel",
    > > - "venc_lt_sel_src",
    > > - "venc_lt_sel";
    > > - assigned-clocks = <&topckgen CLK_TOP_VENC_SEL>,
    > > - <&topckgen CLK_TOP_VENC_LT_SEL>;
    > > - assigned-clock-parents = <&topckgen CLK_TOP_VENCPLL_D2>,
    > > - <&topckgen CLK_TOP_UNIVPLL1_D2>;
    > > + clocks = <&topckgen CLK_TOP_VENC_LT_SEL>;
    > > + clock-names = "venc_lt_sel";
    > > + assigned-clocks = <&topckgen CLK_TOP_VENC_LT_SEL>;
    > > + assigned-clock-parents = <&topckgen CLK_TOP_VCODECPLL_370P5>;
    > > };
    > > --
    > > 1.9.1

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