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bh=8YYp0TgROX4b0+yeBAUosWoOaj4P9FYB644toVdyFuk=; b=Pz98OgltJsObtXJj6a4wscWZqCiXt6+mV5tkBfQvNQiDNpiqQCRfDNjkqfDXdWlmiDgX0r7uRUd/7ZMJpFWeo/hdU3P4zYD5yfILrc2B4NmQjdw68HUa1XDNUVSZfaRP8SDKsMysGQ45A7PXpY3vLCZcK6fYPw5PchH4ykECD88= Received: from LO6P265MB6032.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:2a5::14) by LO2P265MB2941.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:173::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7633.25; Fri, 31 May 2024 13:37:29 +0000 Received: from LO6P265MB6032.GBRP265.PROD.OUTLOOK.COM ([fe80::db1a:5e96:699f:8757]) by LO6P265MB6032.GBRP265.PROD.OUTLOOK.COM ([fe80::db1a:5e96:699f:8757%6]) with mapi id 15.20.7611.030; Fri, 31 May 2024 13:37:29 +0000 From: Frank Binns To: "matthias.bgg@gmail.com" , "tzimmermann@suse.de" , Matt Coster , "sboyd@kernel.org" , "robh@kernel.org" , "krzk+dt@kernel.org" , "aford173@gmail.com" , "maarten.lankhorst@linux.intel.com" , "wenst@chromium.org" , "mripard@kernel.org" , "conor+dt@kernel.org" , "angelogioacchino.delregno@collabora.com" CC: "dri-devel@lists.freedesktop.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "airlied@gmail.com" , "linux-arm-kernel@lists.infradead.org" , "linux-mediatek@lists.infradead.org" , "daniel@ffwll.ch" , "linux-clk@vger.kernel.org" Subject: Re: [PATCH 3/6] dt-bindings: gpu: powervr-rogue: Add MediaTek MT8173 GPU Thread-Topic: [PATCH 3/6] dt-bindings: gpu: powervr-rogue: Add MediaTek MT8173 GPU Thread-Index: AQHas1+uiLvO8xuIYU6nvMbpixGlAg== Date: Fri, 31 May 2024 13:37:29 +0000 Message-ID: References: <20240530083513.4135052-1-wenst@chromium.org> <20240530083513.4135052-4-wenst@chromium.org> In-Reply-To: <20240530083513.4135052-4-wenst@chromium.org> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Evolution 3.36.5-0ubuntu1 x-ms-publictraffictype: Email x-ms-traffictypediagnostic: LO6P265MB6032:EE_|LO2P265MB2941:EE_ x-ms-office365-filtering-correlation-id: afce45cc-91ba-46c2-e386-08dc8176d10a x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0;ARA:13230031|376005|366007|7416005|1800799015|921011|38070700009; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi ChenYu, On Thu, 2024-05-30 at 16:35 +0800, Chen-Yu Tsai wrote: > The MediaTek MT8173 comes with a PowerVR Rogue GX6250, which is one > of the Series6XT GPUs, another sub-family of the Rogue family. I've added Adam Ford who sent out some DT related patches [1] for the Renesas variant of GX6250 and the GX6650 (another Series6XT GPU). > > This was part of the very first few versions of the PowerVR submission, > but was later dropped. The compatible string has been updated to follow > the new naming scheme adopted for the AXE series. > > In a previous iteration of the PowerVR binding submission [1], the > number of clocks required for the 6XT family was mentioned to be > always 3. This is also reflected here. > > [1] https://lore.kernel.org/dri-devel/6eeccb26e09aad67fb30ffcd523c793a43c79c2a.camel@imgtec.com/ > > Signed-off-by: Chen-Yu Tsai > --- > .../bindings/gpu/img,powervr-rogue.yaml | 24 +++++++++++++++---- > 1 file changed, 20 insertions(+), 4 deletions(-) > > diff --git a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml > index 256e252f8087..48aa205b66b4 100644 > --- a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml > +++ b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml > @@ -12,10 +12,17 @@ maintainers: > > properties: > compatible: > - items: > - - enum: > - - ti,am62-gpu > - - const: img,img-axe # IMG AXE GPU model/revision is fully discoverable > + oneOf: > + - items: > + - enum: > + - mediatek,mt8173-gpu > + # PowerVR 6XT GPU model/revision is fully discoverable > + - const: img,powervr-6xt > + - items: > + - enum: > + - ti,am62-gpu > + # IMG AXE GPU model/revision is fully discoverable > + - const: img,img-axe The Series6XT GPU models have differing numbers of power domains (either 2, 4 or 5). Whereas, the AXE GPUs have a single power domain, so I assume there should be a related change here. The GX6250 has two power domains (lets call them A and B). There's a constraint that if domain B is powered then domain A must also be powered. In patch 6 [2] it's setting the power domain to MT8173_POWER_DOMAIN_MFG, which I believe corresponds to power domain B. I assume this works because the MTK power controller driver is encoding the constraint above, meaning that when we disable or enable MT8173_POWER_DOMAIN_MFG it's also disabling/enabling MT8173_POWER_DOMA IN_MFG_2D (domain A). Thanks Frank [1] https://lists.freedesktop.org/archives/dri-devel/2024-February/443548.html [2] https://lists.freedesktop.org/archives/dri-devel/2024-May/455833.html > > reg: > maxItems: 1 > @@ -56,6 +63,15 @@ allOf: > properties: > clocks: > maxItems: 1 > + - if: > + properties: > + compatible: > + contains: > + const: img,powervr-6xt > + then: > + properties: > + clocks: > + minItems: 3 > > examples: > - | _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel