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charset="utf-8"; Format="flowed" Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org CuWcqCAyMDI2LzIvMTMgMTU6MzUsIEtyenlzenRvZiBLb3psb3dza2kg5YaZ6YGTOgo+IFsgRVhU RVJOQUwgRU1BSUwgXQo+Cj4gT24gMTMvMDIvMjAyNiAwNjoxMiwgWmhlbnRhbyBHdW8gdmlhIEI0 IFJlbGF5IHdyb3RlOgo+PiBGcm9tOiBaaGVudGFvIEd1byA8emhlbnRhby5ndW9AYW1sb2dpYy5j b20+Cj4+Cj4+IERlc2NyaWJlIHRoZSBpbml0aWFsIHN1cHBvcnQgZm9yIHRoZSBWNEwyIHN0YXRl bGVzcyB2aWRlbyBkZWNvZGVyCj4+IGRyaXZlciB1c2VkIHdpdGggdGhlIEFtbG9naWMgUzQgKFM4 MDVYMikgcGxhdGZvcm0uCj4+Cj4+IFNpZ25lZC1vZmYtYnk6IFpoZW50YW8gR3VvIDx6aGVudGFv Lmd1b0BhbWxvZ2ljLmNvbT4KPj4gLS0tCj4+ICAgLi4uL2JpbmRpbmdzL21lZGlhL2FtbG9naWMs czQtdmNvZGVjLWRlYy55YW1sICAgICAgfCA5NiArKysrKysrKysrKysrKysrKysrKysrCj4+ICAg MSBmaWxlIGNoYW5nZWQsIDk2IGluc2VydGlvbnMoKykKPj4KPj4gZGlmZiAtLWdpdCBhL0RvY3Vt ZW50YXRpb24vZGV2aWNldHJlZS9iaW5kaW5ncy9tZWRpYS9hbWxvZ2ljLHM0LXZjb2RlYy1kZWMu eWFtbCBiL0RvY3VtZW50YXRpb24vZGV2aWNldHJlZS9iaW5kaW5ncy9tZWRpYS9hbWxvZ2ljLHM0 LXZjb2RlYy1kZWMueWFtbAo+PiBuZXcgZmlsZSBtb2RlIDEwMDY0NAo+PiBpbmRleCAwMDAwMDAw MDAwMDAuLjg4NzgwNTE0ZDA2Ywo+PiAtLS0gL2Rldi9udWxsCj4+ICsrKyBiL0RvY3VtZW50YXRp b24vZGV2aWNldHJlZS9iaW5kaW5ncy9tZWRpYS9hbWxvZ2ljLHM0LXZjb2RlYy1kZWMueWFtbAo+ PiBAQCAtMCwwICsxLDk2IEBACj4+ICsjIFNQRFgtTGljZW5zZS1JZGVudGlmaWVyOiAoR1BMLTIu MC1vbmx5IE9SIEJTRC0yLUNsYXVzZSkKPj4gKyMgQ29weXJpZ2h0IChDKSAyMDI1IEFtbG9naWMs IEluYy4gQWxsIHJpZ2h0cyByZXNlcnZlZAo+PiArJVlBTUwgMS4yCj4+ICstLS0KPj4gKyRpZDog aHR0cDovL2RldmljZXRyZWUub3JnL3NjaGVtYXMvbWVkaWEvYW1sb2dpYyxzNC12Y29kZWMtZGVj LnlhbWwjCj4+ICskc2NoZW1hOiBodHRwOi8vZGV2aWNldHJlZS5vcmcvbWV0YS1zY2hlbWFzL2Nv cmUueWFtbCMKPj4gKwo+PiArdGl0bGU6IEFtbG9naWMgVmlkZW8gRGVjb2RlIEFjY2VsZXJhdG9y Cj4+ICsKPj4gK21haW50YWluZXJzOgo+PiArICAtIFpoZW50YW8gR3VvIDx6aGVudGFvLmd1b0Bh bWxvZ2ljLmNvbT4KPj4gKwo+PiArZGVzY3JpcHRpb246Cj4+ICsgIFRoZSBWaWRlbyBEZWNvZGVy IEFjY2VsZXJhdG9yIHByZXNlbnQgb24gQW1sb2dpYyBTT0NzLgo+PiArICBJdCBzdXBwb3J0cyBz dGF0ZWxlc3MgaDI2NCBkZWNvZGluZy4KPj4gKwo+PiArcHJvcGVydGllczoKPj4gKyAgY29tcGF0 aWJsZToKPj4gKyAgICBjb25zdDogYW1sb2dpYyxzNC12Y29kZWMtZGVjCj4gV2h5IGRvIHlvdSBy ZXBlYXQgImRlYyIgdHdpY2U/IGNvZGVjIG1lYW5zIGRlY29kZXIsIHNvIHdoYXQgaXMgdGhlIGxh c3QKPiAiZGVjIiBhYm91dD8KSW4gZmFjdCwgY29kZWMgbWVhbnMgZW5jb2RlcitkZWNvZGVyLCBh bmQgZGVjIGlzIHNob3J0IGZvciBkZWNvZGVyLgo+PiArCj4+ICsgIHJlZzoKPj4gKyAgICBtYXhJ dGVtczogMgo+PiArCj4+ICsgIHJlZy1uYW1lczoKPj4gKyAgICBpdGVtczoKPj4gKyAgICAgIC0g Y29uc3Q6IGRvcwo+PiArICAgICAgLSBjb25zdDogZG1jCj4+ICsKPj4gKyAgaW50ZXJydXB0czoK Pj4gKyAgICBtYXhJdGVtczogMwo+PiArCj4+ICsgIGNsb2NrczoKPj4gKyAgICBtYXhJdGVtczog Mwo+PiArCj4+ICsgIGNsb2NrLW5hbWVzOgo+PiArICAgIGl0ZW1zOgo+PiArICAgICAgLSBjb25z dDogdmRlYwo+PiArICAgICAgLSBjb25zdDogY2xrX3ZkZWNfbXV4Cj4+ICsgICAgICAtIGNvbnN0 OiBjbGtfaGV2Y2ZfbXV4Cj4gTmFtZSB0aGVtIGJhc2VkIG9uIHRoZWlyIHJvbGUvbmFtZSBpbiB0 aGlzIGRldmljZS4gV2h5IHRoaXMgZGV2aWNlIHdvdWxkCj4gY2FyZSB0aGF0IGl0IHJlY2VpdmVz IGEgbXV4PyBOb3QgYSBkaXY/IG9yIG5vdCBhIGdhdGU/Ck9rLCBwcmV2aW91c2x5IHdlIG92ZXJs b29rZWQgdGhpcy4gV2Ugd2lsbCBpbXByb3ZlIGl0IGluIHRoZSBuZXh0IHZlcnNpb24uCj4+ICsK Pj4gKyAgcG93ZXItZG9tYWluczoKPj4gKyAgICBtYXhJdGVtczogMgo+PiArCj4+ICsgIHBvd2Vy LWRvbWFpbi1uYW1lczoKPj4gKyAgICBpdGVtczoKPj4gKyAgICAgIC0gY29uc3Q6IHZkZWMKPj4g KyAgICAgIC0gY29uc3Q6IGhldmMKPj4gKwo+PiArICByZXNldHM6Cj4+ICsgICAgbWF4SXRlbXM6 IDEKPj4gKwo+PiArICBhbWxvZ2ljLGNhbnZhczoKPj4gKyAgICBkZXNjcmlwdGlvbjogc2hvdWxk IHBvaW50IHRvIGEgY2FudmFzIHByb3ZpZGVyIG5vZGUKPiBXaHk/IFdoYXQgZm9yPwo+Cj4gV2hh dCBpcyBjYW52YXMgcHJvdmlkZXI/CgpUaGUgY2FudmFzIHByb3ZpZGVyIGlzOiBkcml2ZXJzL3Nv Yy9hbWxvZ2ljL21lc29uLWNhbnZhcy5jCgpJbiBzaG9ydCwgY2FudmFzIGlzIGEgaGFyZHdhcmUg SVAgaW5zaWRlIHRoZSBBbWxvZ2ljIFNvQy4gVGhlIGRlY29kZXIgSVAgCm5lZWRzIHRvIGFjY2Vz cyBERFIgdGhyb3VnaCBjYW52YXMgSVAsIHNvIHdlIG5lZWQgdG8gcmVmZXJlbmNlIHRoZSAKY2Fu dmFzIGRyaXZlci4KCj4+ICsgICAgJHJlZjogL3NjaGVtYXMvdHlwZXMueWFtbCMvZGVmaW5pdGlv bnMvcGhhbmRsZQo+PiArCj4+ICtyZXF1aXJlZDoKPj4gKyAgLSBjb21wYXRpYmxlCj4+ICsgIC0g cmVnCj4+ICsgIC0gcmVnLW5hbWVzCj4+ICsgIC0gaW50ZXJydXB0cwo+PiArICAtIGNsb2Nrcwo+ PiArICAtIGNsb2NrLW5hbWVzCj4+ICsgIC0gcG93ZXItZG9tYWlucwo+PiArICAtIHBvd2VyLWRv bWFpbi1uYW1lcwo+PiArCj4gQmVzdCByZWdhcmRzLAo+IEtyenlzenRvZgoKQlJzCgpaaGVudGFv CgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgt YW1sb2dpYyBtYWlsaW5nIGxpc3QKbGludXgtYW1sb2dpY0BsaXN0cy5pbmZyYWRlYWQub3JnCmh0 dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYW1sb2dpYwo= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 026FAEF48DD for ; 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Received: from KL1PR03MB5521.apcprd03.prod.outlook.com (2603:1096:820:51::12) by KUZPR03MB9568.apcprd03.prod.outlook.com (2603:1096:d10:62::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9611.13; Fri, 13 Feb 2026 08:04:48 +0000 Received: from KL1PR03MB5521.apcprd03.prod.outlook.com ([fe80::f12b:85e:f95c:191e]) by KL1PR03MB5521.apcprd03.prod.outlook.com ([fe80::f12b:85e:f95c:191e%4]) with mapi id 15.20.9611.012; Fri, 13 Feb 2026 08:04:48 +0000 Message-ID: Date: Fri, 13 Feb 2026 16:04:46 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC v4 1/4] media: dt-bindings: Add Amlogic V4L2 video decoder To: Krzysztof Kozlowski , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org References: <20260213-b4-s4-vdec-upstream-v4-0-c7112d00d662@amlogic.com> <20260213-b4-s4-vdec-upstream-v4-1-c7112d00d662@amlogic.com> From: Zhentao Guo In-Reply-To: Content-Type: text/plain; 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All rights reserved >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/media/amlogic,s4-vcodec-dec.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Amlogic Video Decode Accelerator >> + >> +maintainers: >> + - Zhentao Guo >> + >> +description: >> + The Video Decoder Accelerator present on Amlogic SOCs. >> + It supports stateless h264 decoding. >> + >> +properties: >> + compatible: >> + const: amlogic,s4-vcodec-dec > Why do you repeat "dec" twice? codec means decoder, so what is the last > "dec" about? In fact, codec means encoder+decoder, and dec is short for decoder. >> + >> + reg: >> + maxItems: 2 >> + >> + reg-names: >> + items: >> + - const: dos >> + - const: dmc >> + >> + interrupts: >> + maxItems: 3 >> + >> + clocks: >> + maxItems: 3 >> + >> + clock-names: >> + items: >> + - const: vdec >> + - const: clk_vdec_mux >> + - const: clk_hevcf_mux > Name them based on their role/name in this device. Why this device would > care that it receives a mux? Not a div? or not a gate? Ok, previously we overlooked this. We will improve it in the next version. >> + >> + power-domains: >> + maxItems: 2 >> + >> + power-domain-names: >> + items: >> + - const: vdec >> + - const: hevc >> + >> + resets: >> + maxItems: 1 >> + >> + amlogic,canvas: >> + description: should point to a canvas provider node > Why? What for? > > What is canvas provider? The canvas provider is: drivers/soc/amlogic/meson-canvas.c In short, canvas is a hardware IP inside the Amlogic SoC. The decoder IP needs to access DDR through canvas IP, so we need to reference the canvas driver. >> + $ref: /schemas/types.yaml#/definitions/phandle >> + >> +required: >> + - compatible >> + - reg >> + - reg-names >> + - interrupts >> + - clocks >> + - clock-names >> + - power-domains >> + - power-domain-names >> + > Best regards, > Krzysztof BRs Zhentao