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Date: Sat, 20 Feb 2021 14:26:43 +0800
From: Irui Wang <irui.wang@...iatek.com>
To: Alexandre Courbot <acourbot@...omium.org>
CC: Hans Verkuil <hverkuil-cisco@...all.nl>,
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>,
Maoguang Meng <maoguang.meng@...iatek.com>,
Longfei Wang <longfei.wang@...iatek.com>,
Yunfei Dong <yunfei.dong@...iatek.com>,
Linux Media Mailing List <linux-media@...r.kernel.org>,
devicetree <devicetree@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@...ts.infradead.org>,
<srv_heupstream@...iatek.com>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH 1/3] dt-bindings: media: mtk-vcodec: Separating mtk
vcodec encoder node
On Wed, 2021-02-03 at 19:44 +0900, Alexandre Courbot wrote:
> On Thu, Jan 21, 2021 at 3:18 PM Irui Wang <irui.wang@...iatek.com> wrote:
> >
> > Updates 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".
> >
> > Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> > Signed-off-by: Maoguang Meng <maoguang.meng@...iatek.com>
> > Signed-off-by: Irui Wang <irui.wang@...iatek.com>
> >
> > ---
> > .../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 8217424fd4bd..f85276e629bf 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.
>
> IMHO "mediatek,mt8173-vcodec-enc-vp8" and
> "mediatek,mt8173-vcodec-enc-avc" would be more logical. Also to keep a
> bit of backward compatibility, shall we also allow
> "mediatek,mt8173-vcodec-enc" to be an alias for
> "mediatek,mt8173-vcodec-enc-avc"? The line above would become
>
> "mediatek,mt8173-vcodec-enc-avc" or "mediatek,mt8173-vcodec-enc" for
> mt8173 avc encoder.
>
will be updated in the next version.
> > "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";
>
> Can't we use "venc_sel" for both avc and vp8, since they are different
> nodes now? That way we can just say
>
> encoder must contain "venc_sel"
>
> which is clearer and also simpler on the code side.
>
ditto
> > + 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@...00000 {
> > assigned-clock-rates = <0>, <0>, <0>, <1482000000>, <800000000>;
> > };
> >
> > - vcodec_enc: vcodec@...02000 {
> > - 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@...02000 {
>
> Let's use vcodec_enc_avc as a label?
ditto
>
> > + 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@...00000 {
> > <&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@...02000 {
>
> And here the label should probably be "vcodec_enc_vp8" for consistency.
ditto
>
>
>
> > + 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@...00000 {
> > <&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>;
> > };
> > --
> > 2.18.0
> >
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