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Date: Wed, 10 Jun 2020 15:38:27 +0800
From: Tiffany Lin <tiffany.lin@...iatek.com>
To: Alexandre Courbot <acourbot@...omium.org>
CC: Rob Herring <robh@...nel.org>, Yong Wu <yong.wu@...iatek.com>,
"Matthias Brugger" <matthias.bgg@...il.com>,
Joerg Roedel <joro@...tes.org>,
"Evan Green" <evgreen@...omium.org>,
Robin Murphy <robin.murphy@....com>,
"Tomasz Figa" <tfiga@...gle.com>,
Will Deacon <will.deacon@....com>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>,
<srv_heupstream@...iatek.com>, <devicetree@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@...ts.infradead.org>,
<iommu@...ts.linux-foundation.org>, <youlin.pei@...iatek.com>,
Nicolas Boichat <drinkcat@...omium.org>,
"Matthias Kaehlcke" <mka@...omium.org>, <anan.sun@...iatek.com>,
<cui.zhang@...iatek.com>, <chao.hao@...iatek.com>,
<ming-fan.chen@...iatek.com>, <eizan@...omium.org>,
Maoguang Meng <maoguang.meng@...iatek.com>,
"Hsin-Yi Wang" <hsinyi@...omium.org>,
Irui Wang <irui.wang@...iatek.com>
Subject: Re: [PATCH v4 01/17] media: dt-binding: mtk-vcodec: Separating
mtk-vcodec encode node.
On Wed, 2020-06-10 at 15:46 +0900, Alexandre Courbot wrote:
> On Wed, Jun 10, 2020 at 6:21 AM Rob Herring <robh@...nel.org> wrote:
> >
> > On Sat, May 30, 2020 at 04:10:02PM +0800, Yong Wu wrote:
> > > From: Maoguang Meng <maoguang.meng@...iatek.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?
>
In my opinion, there is no need to change mt8173 dts for driver to
support mt8183.
I saw another patch that already make change to have encoder driver
support both mt8173 and mt8183.
But they done a lot to prove h264 and vp8 encoder could work
independently and parallel.
In this case, I am ok with it because dts should be a reflection of the
actual hardware.
> >
> > >
> > > This is a preparing patch for smi cleaning up "mediatek,larb".
> > >
> > > Signed-off-by: Maoguang Meng <maoguang.meng@...iatek.com>
> > > Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> > > Signed-off-by: Irui Wang <irui.wang@...iatek.com>
> > > Signed-off-by: Yong Wu <yong.wu@...iatek.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@...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 {
> > > + 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 {
> > > + 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>;
> > > };
> > > --
> > > 1.9.1
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