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Mon, 06 Apr 2026 05:22:02 -0700 (PDT) From: Laurentiu Mihalcea To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Viresh Kumar , Tushar Khandelwal , Shengjiu Wang , Daniel Baluta Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RFC 1/3] dt-bindings: dsp: fsl,dsp: drop references to SOF programming model Date: Mon, 6 Apr 2026 05:20:23 -0700 Message-ID: <20260406122025.4515-2-laurentiumihalcea111@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260406122025.4515-1-laurentiumihalcea111@gmail.com> References: <20260406122025.4515-1-laurentiumihalcea111@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Laurentiu Mihalcea Compatible names ending in "-dsp" are associated with the SOF programming model, which, at the moment has no devicetree users in the upstream kernel. Furthermore, the binding either doesn't document all of the required properties (e.g. "port" children are missing, "memory-region-names" is undocumented) or the properties that are documented are wrong (e.g. fsl,imx8ulp-hifi4 needs 2 reserved memory regions, not 1). Since the two programming models (SOF and non-SOF) have some differences, it would make more sense for the 8 series DSP bindings to follow the same pattern used for MX95's CM7 (i.e. one or more binding files, including the common fsl,sof-cpu.yaml). Given all of this, and since, at the moment, there's no plan to upstream the devicetrees making use of this programming model anytime soon, drop all the references to the SOF programming model from the binding docuemnt as an attempt to clean it up. Signed-off-by: Laurentiu Mihalcea --- .../devicetree/bindings/dsp/fsl,dsp.yaml | 67 ++----------------- .../bindings/mailbox/arm,mhuv2.yaml | 8 +-- 2 files changed, 9 insertions(+), 66 deletions(-) diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documenta= tion/devicetree/bindings/dsp/fsl,dsp.yaml index e610b7636a08..7970f90781c2 100644 --- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml +++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml @@ -17,10 +17,6 @@ description: | properties: compatible: enum: - - fsl,imx8qxp-dsp - - fsl,imx8qm-dsp - - fsl,imx8mp-dsp - - fsl,imx8ulp-dsp - fsl,imx8qxp-hifi4 - fsl,imx8qm-hifi4 - fsl,imx8mp-hifi4 @@ -59,18 +55,18 @@ properties: List of <&phandle type channel> - 2 channels for TXDB, 2 channels fo= r RXDB or - 1 channel for TX, 1 channel for RX, 1 channel for RXDB (see mailbox/fsl,mu.txt) - minItems: 3 - maxItems: 4 + maxItems: 3 =20 mbox-names: - minItems: 3 - maxItems: 4 + items: + - const: tx + - const: rx + - const: rxdb =20 memory-region: description: phandle to a node describing reserved memory (System RAM memory) used by DSP (see bindings/reserved-memory/reserved-memory.txt) - minItems: 1 maxItems: 4 =20 firmware-name: @@ -110,7 +106,6 @@ allOf: compatible: contains: enum: - - fsl,imx8qxp-dsp - fsl,imx8qxp-hifi4 then: properties: @@ -123,7 +118,6 @@ allOf: compatible: contains: enum: - - fsl,imx8qm-dsp - fsl,imx8qm-hifi4 then: properties: @@ -135,9 +129,7 @@ allOf: compatible: contains: enum: - - fsl,imx8mp-dsp - fsl,imx8mp-hifi4 - - fsl,imx8ulp-dsp - fsl,imx8ulp-hifi4 then: properties: @@ -149,39 +141,6 @@ allOf: compatible: contains: enum: - - fsl,imx8qxp-hifi4 - - fsl,imx8qm-hifi4 - - fsl,imx8mp-hifi4 - - fsl,imx8ulp-hifi4 - then: - properties: - memory-region: - minItems: 4 - mboxes: - maxItems: 3 - mbox-names: - items: - - const: tx - - const: rx - - const: rxdb - else: - properties: - memory-region: - maxItems: 1 - mboxes: - minItems: 4 - mbox-names: - items: - - const: txdb0 - - const: txdb1 - - const: rxdb0 - - const: rxdb1 - - if: - properties: - compatible: - contains: - enum: - - fsl,imx8mp-dsp - fsl,imx8mp-hifi4 then: required: @@ -191,22 +150,6 @@ allOf: additionalProperties: false =20 examples: - - | - #include - #include - dsp@596e8000 { - compatible =3D "fsl,imx8qxp-dsp"; - reg =3D <0x596e8000 0x88000>; - clocks =3D <&adma_lpcg IMX_ADMA_LPCG_DSP_IPG_CLK>, - <&adma_lpcg IMX_ADMA_LPCG_OCRAM_IPG_CLK>, - <&adma_lpcg IMX_ADMA_LPCG_DSP_CORE_CLK>; - clock-names =3D "ipg", "ocram", "core"; - power-domains =3D <&pd IMX_SC_R_MU_13B>, - <&pd IMX_SC_R_MU_2A>; - mbox-names =3D "txdb0", "txdb1", "rxdb0", "rxdb1"; - mboxes =3D <&lsio_mu13 2 0>, <&lsio_mu13 2 1>, <&lsio_mu13 3 0>, <= &lsio_mu13 3 1>; - memory-region =3D <&dsp_reserved>; - }; - | #include #include diff --git a/Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml b/Doc= umentation/devicetree/bindings/mailbox/arm,mhuv2.yaml index 3828d77f6316..d6ab66f6f3d5 100644 --- a/Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml +++ b/Documentation/devicetree/bindings/mailbox/arm,mhuv2.yaml @@ -192,16 +192,16 @@ examples: }; =20 mhu_client: dsp@596e8000 { - compatible =3D "fsl,imx8qxp-dsp"; + compatible =3D "fsl,imx8qxp-hifi4"; reg =3D <0 0x596e8000 0 0x88000>; clocks =3D <&adma_lpcg 0>, <&adma_lpcg 1>, <&adma_lpcg 2>; 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Mon, 06 Apr 2026 05:22:06 -0700 (PDT) Received: from SMW024614.wbi.nxp.com ([128.77.115.158]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48899d1c148sm138541595e9.5.2026.04.06.05.22.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Apr 2026 05:22:06 -0700 (PDT) From: Laurentiu Mihalcea To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Viresh Kumar , Tushar Khandelwal , Shengjiu Wang , Daniel Baluta Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RFC 2/3] dt-bindings: dsp: fsl,dsp: remove reserved memory definitions Date: Mon, 6 Apr 2026 05:20:24 -0700 Message-ID: <20260406122025.4515-3-laurentiumihalcea111@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260406122025.4515-1-laurentiumihalcea111@gmail.com> References: <20260406122025.4515-1-laurentiumihalcea111@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Laurentiu Mihalcea There's no need to define the DT nodes referenced by the node's phandle. Remove them. Signed-off-by: Laurentiu Mihalcea --- .../devicetree/bindings/dsp/fsl,dsp.yaml | 17 ----------------- 1 file changed, 17 deletions(-) diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documenta= tion/devicetree/bindings/dsp/fsl,dsp.yaml index 7970f90781c2..65ed26aa3308 100644 --- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml +++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml @@ -153,23 +153,6 @@ examples: - | #include #include - dsp_reserved: dsp@92400000 { - reg =3D <0x92400000 0x1000000>; - no-map; - }; - dsp_vdev0vring0: vdev0vring0@942f0000 { - reg =3D <0x942f0000 0x8000>; - no-map; - }; - dsp_vdev0vring1: vdev0vring1@942f8000 { - reg =3D <0x942f8000 0x8000>; - no-map; - }; - dsp_vdev0buffer: vdev0buffer@94300000 { - compatible =3D "shared-dma-pool"; - reg =3D <0x94300000 0x100000>; - no-map; - }; =20 dsp: dsp@3b6e8000 { compatible =3D "fsl,imx8mp-hifi4"; --=20 2.43.0 From nobody Sun Jun 14 21:18:57 2026 Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C04623368B0 for ; 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Mon, 06 Apr 2026 05:22:09 -0700 (PDT) Received: from SMW024614.wbi.nxp.com ([128.77.115.158]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48899d1c148sm138541595e9.5.2026.04.06.05.22.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Apr 2026 05:22:08 -0700 (PDT) From: Laurentiu Mihalcea To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Viresh Kumar , Tushar Khandelwal , Shengjiu Wang , Daniel Baluta Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RFC 3/3] dt-bindings: dsp: fsl,dsp: remove descriptions for common properties Date: Mon, 6 Apr 2026 05:20:25 -0700 Message-ID: <20260406122025.4515-4-laurentiumihalcea111@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260406122025.4515-1-laurentiumihalcea111@gmail.com> References: <20260406122025.4515-1-laurentiumihalcea111@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Laurentiu Mihalcea "mboxes", "power-domains", and "memory-region" are common properties, which should be already documented. As such, descriptions referencing old .txt binding files provide no additional information. Thus, remove them. Signed-off-by: Laurentiu Mihalcea --- Documentation/devicetree/bindings/dsp/fsl,dsp.yaml | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documenta= tion/devicetree/bindings/dsp/fsl,dsp.yaml index 65ed26aa3308..d483a229c292 100644 --- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml +++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml @@ -44,17 +44,10 @@ properties: minItems: 3 =20 power-domains: - description: - List of phandle and PM domain specifier as documented in - Documentation/devicetree/bindings/power/power_domain.txt minItems: 1 maxItems: 4 =20 mboxes: - description: - List of <&phandle type channel> - 2 channels for TXDB, 2 channels fo= r RXDB - or - 1 channel for TX, 1 channel for RX, 1 channel for RXDB - (see mailbox/fsl,mu.txt) maxItems: 3 =20 mbox-names: @@ -64,9 +57,6 @@ properties: - const: rxdb =20 memory-region: - description: - phandle to a node describing reserved memory (System RAM memory) - used by DSP (see bindings/reserved-memory/reserved-memory.txt) maxItems: 4 =20 firmware-name: --=20 2.43.0