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charset="us-ascii" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-OriginatorOrg: chipsnmedia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SL2P216MB1246.KORP216.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-Network-Message-Id: 599d507e-89fa-4dc3-653d-08dd5251d6e9 X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Feb 2025 08:29:20.7613 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4d70c8e9-142b-4389-b7f2-fa8a3c68c467 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 4HFxjlHvWGpC1yU8FkG0raGQVnU4Xc5z/0I27RC+DgCaK4f/ziSVT/+QiluJ4CW3+OiPKFAvzrKUjDYeLnYuJhspH930I2XH91rydpZ/ZEU= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SL2P216MB2846 Hi, Krzysztof. >-----Original Message----- >From: Krzysztof Kozlowski >Sent: Thursday, February 20, 2025 5:32 PM >To: Nas Chung >Cc: mchehab@kernel.org; hverkuil@xs4all.nl; sebastian.fricke@collabora.com= ; >robh@kernel.org; krzk+dt@kernel.org; conor+dt@kernel.org; linux- >media@vger.kernel.org; devicetree@vger.kernel.org; linux- >kernel@vger.kernel.org; linux-imx@nxp.com; linux-arm- >kernel@lists.infradead.org; jackson.lee ; >lafley.kim >Subject: Re: [PATCH 3/8] dt-bindings: media: nxp: Add Wave6 video codec >device > >On 20/02/2025 08:35, Nas Chung wrote: >> Hi, Krzysztof. >> >>> -----Original Message----- >>> From: Krzysztof Kozlowski >>> Sent: Wednesday, February 19, 2025 9:32 PM >>> To: Nas Chung >>> Cc: mchehab@kernel.org; hverkuil@xs4all.nl; >sebastian.fricke@collabora.com; >>> robh@kernel.org; krzk+dt@kernel.org; conor+dt@kernel.org; linux- >>> media@vger.kernel.org; devicetree@vger.kernel.org; linux- >>> kernel@vger.kernel.org; linux-imx@nxp.com; linux-arm- >>> kernel@lists.infradead.org; jackson.lee ; >>> lafley.kim >>> Subject: Re: [PATCH 3/8] dt-bindings: media: nxp: Add Wave6 video codec >>> device >>> >>> On 18/02/2025 10:21, Nas Chung wrote: >>>> For example: >>>> vpu: video-codec@4c480000 { >>>> compatible =3D "nxp,imx95-vpu"; >>>> reg =3D <0x0 0x4c480000 0x0 0x50000>; >>>> ranges =3D <0x0 0x0 0x4c480000 0x50000>; >>>> >>>> vpuctrl: vpu-ctrl@40000 { >>>> compatible =3D "nxp,imx95-vpu-ctrl"; >>>> reg =3D <0x40000 0x10000>; >>>> }; >>>> >>>> vpucore0: vpu-core@00000 { >>>> compatible =3D "nxp,imx95-vpu-core"; >>>> reg =3D <0x00000 0x10000>; >>>> }; >>>> >>>> vpucore1: vpu-core@10000 { >>>> compatible =3D "nxp,imx95-vpu-core"; >>>> reg =3D <0x10000 0x10000>; >>>> }; >>>> >>>> vpucore2: vpu-core@20000 { >>>> compatible =3D "nxp,imx95-vpu-core"; >>>> reg =3D <0x20000 0x10000>; >>>> }; >>>> >>>> vpucore3: vpu-core@30000 { >>>> compatible =3D "nxp,imx95-vpu-core"; >>> >>> Why do you need compatible here? Could it be anything else? >> >> I will update the driver based on the final DT. >> >>> >>>> reg =3D <0x30000 0x10000>; >>> >>> Where is the rest of resources? You created children only for one >>> resource - address space? >> >> Sorry for the confusion. >> I believe the final example looks like the one below. >> >> vpu: video-codec@4c480000 { >> compatible =3D "nxp,imx95-vpu"; >> reg =3D <0x0 0x4c480000 0x0 0x50000>; >> ranges =3D <0x0 0x0 0x4c480000 0x50000>; >> >> vpuctrl: vpu-ctrl@40000 { >> compatible =3D "nxp,imx95-vpu-ctrl"; >> reg =3D <0x40000 0x10000>; >> clocks =3D <&scmi_clk 115>, >> <&vpu_blk_ctrl IMX95_CLK_VPUBLK_WAVE>; >> clock-names =3D "vpu", "vpublk_wave"; >> power-domains =3D <&scmi_devpd 21>, <&scmi_perf 10>; >> power-domain-names =3D "vpumix", "vpuperf"; >> memory-region =3D <&vpu_boot>; >> #cooling-cells =3D <2>; >> sram =3D <&sram1>; >> }; >> >> vpucore0: vpu-core@00000 { >> compatible =3D "nxp,imx95-vpu-core"; >> reg =3D <0x00000 0x10000>; >> interrupts =3D ; >> clocks =3D <&scmi_clk 115>, >> <&vpu_blk_ctrl IMX95_CLK_VPUBLK_WAVE>; > > >These are the same resources for every block so for entire device. Why >they are no in top level node? > >> clock-names =3D "vpu", "vpublk_wave"; >> power-domains =3D <&scmi_devpd 21>; > >Same here > >Everything else also looks duplicated... All my previous comments - from >first email - stand. Don't design DT to match your Linu driver structure. I agree with you. Thanks again for your feedback. I've moved the shared resources to the parent node while keeping the independent resources within their respective child nodes, as shown below. vpu: video-codec@4c480000 { compatible =3D "nxp,imx95-vpu"; reg =3D <0x0 0x4c480000 0x0 0x50000>; ranges =3D <0x0 0x0 0x4c480000 0x50000>; clocks =3D <&scmi_clk IMX95_CLK_VPU>, <&vpu_blk_ctrl IMX95_CLK_VPUBLK_WAVE>; clock-names =3D "vpu", "vpublk_wave"; power-domains =3D <&scmi_devpd IMX95_PD_VPU>; vpucore0: vpu-core@00000 { compatible =3D "nxp,imx95-vpu-core"; reg =3D <0x00000 0x10000>; interrupts =3D ; }; vpucore1: vpu-core@10000 { compatible =3D "nxp,imx95-vpu-core"; reg =3D <0x10000 0x10000>; interrupts =3D ; }; vpucore2: vpu-core@20000 { compatible =3D "nxp,imx95-vpu-core"; reg =3D <0x20000 0x10000>; interrupts =3D ; }; vpucore3: vpu-core@30000 { compatible =3D "nxp,imx95-vpu-core"; reg =3D <0x30000 0x10000>; interrupts =3D ; }; vpuctrl: vpu-ctrl@40000 { compatible =3D "nxp,imx95-vpu-ctrl"; reg =3D <0x40000 0x10000>; power-domains =3D <&scmi_perf IMX95_PERF_VPU>; memory-region =3D <&vpu_boot>; #cooling-cells =3D <2>; sram =3D <&sram1>; }; }; Thanks. Nas. > >Best regards, >Krzysztof