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Signed-off-by: Daniel Baluta Acked-by: Rob Herring (Arm) Reviewed-by: Frank Li --- include/dt-bindings/reset/imx8mp-reset-audiomix.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 include/dt-bindings/reset/imx8mp-reset-audiomix.h diff --git a/include/dt-bindings/reset/imx8mp-reset-audiomix.h b/include/dt-bindings/reset/imx8mp-reset-audiomix.h new file mode 100644 index 000000000000..3349bf311764 --- /dev/null +++ b/include/dt-bindings/reset/imx8mp-reset-audiomix.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0-only OR MIT */ +/* + * Copyright 2025 NXP + */ + +#ifndef DT_BINDING_RESET_IMX8MP_AUDIOMIX_H +#define DT_BINDING_RESET_IMX8MP_AUDIOMIX_H + +#define IMX8MP_AUDIOMIX_EARC 0 +#define IMX8MP_AUDIOMIX_EARC_PHY 1 +#define IMX8MP_AUDIOMIX_DSP 2 + +#endif /* DT_BINDING_RESET_IMX8MP_AUDIOMIX_H */ From patchwork Tue Feb 25 10:19:59 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Baluta X-Patchwork-Id: 13989732 Received: from EUR03-VI1-obe.outbound.protection.outlook.com (mail-vi1eur03on2049.outbound.protection.outlook.com [40.107.103.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5E49226658B for ; 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Received: from AS8PR04MB8247.eurprd04.prod.outlook.com (2603:10a6:20b:3f2::13) by DU0PR04MB9393.eurprd04.prod.outlook.com (2603:10a6:10:358::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8466.19; Tue, 25 Feb 2025 10:19:13 +0000 Received: from AS8PR04MB8247.eurprd04.prod.outlook.com ([fe80::84f7:e2c3:ceed:c0a6]) by AS8PR04MB8247.eurprd04.prod.outlook.com ([fe80::84f7:e2c3:ceed:c0a6%5]) with mapi id 15.20.8466.016; Tue, 25 Feb 2025 10:19:13 +0000 From: Daniel Baluta To: p.zabel@pengutronix.de, robh@kernel.org, krzk+dt@kernel.org, shawnguo@kernel.org, mathieu.poirier@linaro.org Cc: conor+dt@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-remoteproc@vger.kernel.org, andersson@kernel.org, Frank.Li@nxp.com, peng.fan@nxp.com, laurentiu.mihalcea@nxp.com, iuliana.prodan@nxp.com, Daniel Baluta Subject: [PATCH v3 2/8] dt-bindings: dsp: fsl,dsp: Add resets property Date: Tue, 25 Feb 2025 12:19:59 +0200 Message-ID: <20250225102005.408773-3-daniel.baluta@nxp.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250225102005.408773-1-daniel.baluta@nxp.com> References: <20250225102005.408773-1-daniel.baluta@nxp.com> X-ClientProxiedBy: WA1P291CA0015.POLP291.PROD.OUTLOOK.COM (2603:10a6:1d0:19::13) To AS8PR04MB8247.eurprd04.prod.outlook.com (2603:10a6:20b:3f2::13) Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS8PR04MB8247:EE_|DU0PR04MB9393:EE_ X-MS-Office365-Filtering-Correlation-Id: 3095c9aa-278a-4a83-9c9b-08dd5585d9ad X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|52116014|7416014|1800799024|38350700014; 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Audio block control bits are used to for Run/Stall the DSP core while the DAP bits are used for software reset the core. The original plan was to use fsl,dsp-ctrl property and to refer the audiomix bits via syscon interface. This proposal received NACK from community we shouldn't abuse the syscon interface [1]. So remove fsl,dsp-ctrl property for i.MX8MP and use reset control interface instead. [1] https://patchwork.kernel.org/project/imx/patch/20250212085222.107102-6-daniel.baluta@nxp.com/ Signed-off-by: Daniel Baluta Reviewed-by: Frank Li --- .../devicetree/bindings/dsp/fsl,dsp.yaml | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml index ab93ffd3d2e5..b3550c9d12e7 100644 --- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml +++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml @@ -82,6 +82,9 @@ properties: description: Phandle to syscon block which provide access for processor enablement + resets: + maxItems: 1 + required: - compatible - reg @@ -164,6 +167,16 @@ allOf: - const: txdb1 - const: rxdb0 - const: rxdb1 + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8mp-dsp + - fsl,imx8mp-hifi4 + then: + required: + - resets additionalProperties: false @@ -186,6 +199,7 @@ examples: }; - | #include + #include dsp_reserved: dsp@92400000 { reg = <0x92400000 0x1000000>; 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Signed-off-by: Daniel Baluta Reviewed-by: Frank Li --- arch/arm64/boot/dts/freescale/imx8mp.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi index e0d3b8cba221..780245d4ce61 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi @@ -6,6 +6,7 @@ #include #include #include +#include #include #include #include @@ -2421,6 +2422,7 @@ dsp: dsp@3b6e8000 { mboxes = <&mu2 2 0>, <&mu2 2 1>, <&mu2 3 0>, <&mu2 3 1>; memory-region = <&dsp_reserved>; + resets = <&audio_blk_ctrl IMX8MP_AUDIOMIX_DSP>; status = "disabled"; }; }; From patchwork Tue Feb 25 10:20:01 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Baluta X-Patchwork-Id: 13989734 Received: from AS8PR04CU009.outbound.protection.outlook.com (mail-westeuropeazon11011025.outbound.protection.outlook.com [52.101.70.25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 34EE4264A94 for ; 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Signed-off-by: Daniel Baluta Reviewed-by: Philipp Zabel Reviewed-by: Frank Li Reviewed-by: Peng Fan --- drivers/reset/reset-imx8mp-audiomix.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c index 6e3f3069f727..1fe21980a66c 100644 --- a/drivers/reset/reset-imx8mp-audiomix.c +++ b/drivers/reset/reset-imx8mp-audiomix.c @@ -11,8 +11,8 @@ #include #include -#define EARC 0x200 -#define EARC_RESET_MASK 0x3 +#define IMX8MP_AUDIOMIX_EARC_OFFSET 0x200 +#define IMX8MP_AUDIOMIX_EARC_RESET_MASK 0x3 struct imx8mp_audiomix_reset { struct reset_controller_dev rcdev; @@ -35,8 +35,8 @@ static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev, mask = BIT(id); spin_lock_irqsave(&priv->lock, flags); - reg = readl(reg_addr + EARC); - writel(reg & ~mask, reg_addr + EARC); + reg = readl(reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); + writel(reg & ~mask, reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); spin_unlock_irqrestore(&priv->lock, flags); return 0; @@ -52,8 +52,8 @@ static int imx8mp_audiomix_reset_deassert(struct reset_controller_dev *rcdev, mask = BIT(id); spin_lock_irqsave(&priv->lock, flags); - reg = readl(reg_addr + EARC); - writel(reg | mask, reg_addr + EARC); + reg = readl(reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); + writel(reg | mask, reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); spin_unlock_irqrestore(&priv->lock, flags); return 0; @@ -78,7 +78,7 @@ static int imx8mp_audiomix_reset_probe(struct auxiliary_device *adev, spin_lock_init(&priv->lock); priv->rcdev.owner = THIS_MODULE; - priv->rcdev.nr_resets = fls(EARC_RESET_MASK); + priv->rcdev.nr_resets = fls(IMX8MP_AUDIOMIX_EARC_RESET_MASK); priv->rcdev.ops = &imx8mp_audiomix_reset_ops; priv->rcdev.of_node = dev->parent->of_node; priv->rcdev.dev = dev; From patchwork Tue Feb 25 10:20:02 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Baluta X-Patchwork-Id: 13989735 Received: from AS8PR04CU009.outbound.protection.outlook.com (mail-westeuropeazon11011028.outbound.protection.outlook.com [52.101.70.28]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4AF07266B77 for ; 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So, refactor the code in order to easily allow more reset bits in the future. Signed-off-by: Daniel Baluta Reviewed-by: Frank Li --- drivers/reset/reset-imx8mp-audiomix.c | 43 ++++++++++++++++++++------- 1 file changed, 33 insertions(+), 10 deletions(-) diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c index 1fe21980a66c..d632bd380053 100644 --- a/drivers/reset/reset-imx8mp-audiomix.c +++ b/drivers/reset/reset-imx8mp-audiomix.c @@ -3,6 +3,8 @@ * Copyright 2024 NXP */ +#include + #include #include #include @@ -12,7 +14,24 @@ #include #define IMX8MP_AUDIOMIX_EARC_OFFSET 0x200 -#define IMX8MP_AUDIOMIX_EARC_RESET_MASK 0x3 +#define IMX8MP_AUDIOMIX_EARC_RESET_MASK BIT(1) +#define IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK BIT(2) + +struct imx8mp_reset_map { + unsigned int offset; + unsigned int mask; +}; + +static const struct imx8mp_reset_map reset_map[] = { + [IMX8MP_AUDIOMIX_EARC] = { + .offset = IMX8MP_AUDIOMIX_EARC_OFFSET, + .mask = IMX8MP_AUDIOMIX_EARC_RESET_MASK, + }, + [IMX8MP_AUDIOMIX_EARC_PHY] = { + .offset = IMX8MP_AUDIOMIX_EARC_OFFSET, + .mask = IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK, + }, +}; struct imx8mp_audiomix_reset { struct reset_controller_dev rcdev; @@ -30,13 +49,15 @@ static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev, { struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev); void __iomem *reg_addr = priv->base; - unsigned int mask, reg; + unsigned int mask, offset, reg; unsigned long flags; - mask = BIT(id); + mask = reset_map[id].mask; + offset = reset_map[id].offset; + spin_lock_irqsave(&priv->lock, flags); - reg = readl(reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); - writel(reg & ~mask, reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); + reg = readl(reg_addr + offset); + writel(reg & ~mask, reg_addr + offset); spin_unlock_irqrestore(&priv->lock, flags); return 0; @@ -47,13 +68,15 @@ static int imx8mp_audiomix_reset_deassert(struct reset_controller_dev *rcdev, { struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev); void __iomem *reg_addr = priv->base; - unsigned int mask, reg; + unsigned int mask, offset, reg; unsigned long flags; - mask = BIT(id); + mask = reset_map[id].mask; + offset = reset_map[id].offset; + spin_lock_irqsave(&priv->lock, flags); - reg = readl(reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); - writel(reg | mask, reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); + reg = readl(reg_addr + offset); + writel(reg | mask, reg_addr + offset); spin_unlock_irqrestore(&priv->lock, flags); return 0; @@ -78,7 +101,7 @@ static int imx8mp_audiomix_reset_probe(struct auxiliary_device *adev, spin_lock_init(&priv->lock); priv->rcdev.owner = THIS_MODULE; - priv->rcdev.nr_resets = fls(IMX8MP_AUDIOMIX_EARC_RESET_MASK); + priv->rcdev.nr_resets = ARRAY_SIZE(reset_map); priv->rcdev.ops = &imx8mp_audiomix_reset_ops; priv->rcdev.of_node = dev->parent->of_node; priv->rcdev.dev = dev; From patchwork Tue Feb 25 10:20:03 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Baluta X-Patchwork-Id: 13989736 Received: from DU2PR03CU002.outbound.protection.outlook.com (mail-northeuropeazon11012005.outbound.protection.outlook.com [52.101.66.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 72B26266B40 for ; 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Refactor assert/deassert function in order to take into account the active_low configuration option. Signed-off-by: Daniel Baluta Reviewed-by: Philipp Zabel Reviewed-by: Peng Fan Reviewed-by: Frank Li --- drivers/reset/reset-imx8mp-audiomix.c | 41 ++++++++++++++------------- 1 file changed, 22 insertions(+), 19 deletions(-) diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c index d632bd380053..558da232ed8e 100644 --- a/drivers/reset/reset-imx8mp-audiomix.c +++ b/drivers/reset/reset-imx8mp-audiomix.c @@ -20,16 +20,19 @@ struct imx8mp_reset_map { unsigned int offset; unsigned int mask; + bool active_low; }; static const struct imx8mp_reset_map reset_map[] = { [IMX8MP_AUDIOMIX_EARC] = { .offset = IMX8MP_AUDIOMIX_EARC_OFFSET, .mask = IMX8MP_AUDIOMIX_EARC_RESET_MASK, + .active_low = true, }, [IMX8MP_AUDIOMIX_EARC_PHY] = { .offset = IMX8MP_AUDIOMIX_EARC_OFFSET, .mask = IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK, + .active_low = true, }, }; @@ -44,42 +47,42 @@ static struct imx8mp_audiomix_reset *to_imx8mp_audiomix_reset(struct reset_contr return container_of(rcdev, struct imx8mp_audiomix_reset, rcdev); } -static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev, - unsigned long id) +static int imx8mp_audiomix_update(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) { struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev); void __iomem *reg_addr = priv->base; - unsigned int mask, offset, reg; - unsigned long flags; + unsigned int mask, offset, active_low; + unsigned long reg, flags; mask = reset_map[id].mask; offset = reset_map[id].offset; + active_low = reset_map[id].active_low; spin_lock_irqsave(&priv->lock, flags); + reg = readl(reg_addr + offset); - writel(reg & ~mask, reg_addr + offset); + if (active_low ^ assert) + reg |= mask; + else + reg &= ~mask; + writel(reg, reg_addr + offset); + spin_unlock_irqrestore(&priv->lock, flags); return 0; } +static int imx8mp_audiomix_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return imx8mp_audiomix_update(rcdev, id, true); +} + static int imx8mp_audiomix_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id) { - struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev); 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Received: from AS8PR04MB8247.eurprd04.prod.outlook.com (2603:10a6:20b:3f2::13) by AS1PR04MB9504.eurprd04.prod.outlook.com (2603:10a6:20b:4c6::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8489.18; Tue, 25 Feb 2025 10:19:44 +0000 Received: from AS8PR04MB8247.eurprd04.prod.outlook.com ([fe80::84f7:e2c3:ceed:c0a6]) by AS8PR04MB8247.eurprd04.prod.outlook.com ([fe80::84f7:e2c3:ceed:c0a6%5]) with mapi id 15.20.8466.016; Tue, 25 Feb 2025 10:19:44 +0000 From: Daniel Baluta To: p.zabel@pengutronix.de, robh@kernel.org, krzk+dt@kernel.org, shawnguo@kernel.org, mathieu.poirier@linaro.org Cc: conor+dt@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-remoteproc@vger.kernel.org, andersson@kernel.org, Frank.Li@nxp.com, peng.fan@nxp.com, laurentiu.mihalcea@nxp.com, iuliana.prodan@nxp.com, Daniel Baluta Subject: [PATCH v3 7/8] reset: imx8mp-audiomix: Add support for DSP run/stall Date: Tue, 25 Feb 2025 12:20:04 +0200 Message-ID: <20250225102005.408773-8-daniel.baluta@nxp.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250225102005.408773-1-daniel.baluta@nxp.com> References: <20250225102005.408773-1-daniel.baluta@nxp.com> X-ClientProxiedBy: WA1P291CA0015.POLP291.PROD.OUTLOOK.COM (2603:10a6:1d0:19::13) To AS8PR04MB8247.eurprd04.prod.outlook.com (2603:10a6:20b:3f2::13) Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS8PR04MB8247:EE_|AS1PR04MB9504:EE_ X-MS-Office365-Filtering-Correlation-Id: a9c7c89a-b947-4b80-61b8-08dd5585ec0e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|52116014|376014|1800799024|366016|38350700014; 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Implement this functionality using the reset controller and use assert for Stall and deassert for Run. Signed-off-by: Daniel Baluta Reviewed-by: Frank Li --- drivers/reset/reset-imx8mp-audiomix.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c index 558da232ed8e..6e0bc477778c 100644 --- a/drivers/reset/reset-imx8mp-audiomix.c +++ b/drivers/reset/reset-imx8mp-audiomix.c @@ -17,6 +17,9 @@ #define IMX8MP_AUDIOMIX_EARC_RESET_MASK BIT(1) #define IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK BIT(2) +#define IMX8MP_AUDIOMIX_DSP_OFFSET 0x108 +#define IMX8MP_AUDIOMIX_DSP_RUNSTALL_MASK BIT(5) + struct imx8mp_reset_map { unsigned int offset; unsigned int mask; @@ -34,6 +37,11 @@ static const struct imx8mp_reset_map reset_map[] = { .mask = IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK, .active_low = true, }, + [IMX8MP_AUDIOMIX_DSP] = { + .offset = IMX8MP_AUDIOMIX_DSP_OFFSET, + .mask = IMX8MP_AUDIOMIX_DSP_RUNSTALL_MASK, + .active_low = false, + }, }; struct imx8mp_audiomix_reset { From patchwork Tue Feb 25 10:20:05 2025 Content-Type: text/plain; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: f854309a-2722-4520-4890-08dd5585efba X-MS-Exchange-CrossTenant-AuthSource: AS8PR04MB8247.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Feb 2025 10:19:50.6282 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Dn1/h8BKeDgHPnZmt7hDjPVclv5oyQqDLzhNNLDnAsg2hKIiOq/phpv1vwEZlOmUiVwdznXKNDKx2uR8mxDS5g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR04MB6971 DSP on i.MX8MP doesn't have a direct reset line so according to hardware design team in order to handle assert/deassert/reset functionality we need to use a combination of control bits from two modules. Audio block control module for Run/Stall control of the DSP and DAP module in order to do software reset. Initial design accessed RunStall bits from audio block control using the syscon interface but this got NACKed by community because of abusing the syscon interface [1]. So instead we use the reset controller API. [1] https://patchwork.kernel.org/project/imx/patch/20250212085222.107102-6-daniel.baluta@nxp.com/ Signed-off-by: Daniel Baluta Reviewed-by: Peng Fan Reviewed-by: Frank Li --- drivers/remoteproc/imx_dsp_rproc.c | 25 +++++++++++++++++-------- drivers/remoteproc/imx_rproc.h | 2 ++ 2 files changed, 19 insertions(+), 8 deletions(-) diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c index ea5024919c2f..e8552d39abe1 100644 --- a/drivers/remoteproc/imx_dsp_rproc.c +++ b/drivers/remoteproc/imx_dsp_rproc.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include "imx_rproc.h" @@ -111,6 +112,7 @@ enum imx_dsp_rp_mbox_messages { */ struct imx_dsp_rproc { struct regmap *regmap; + struct reset_control *run_stall; struct rproc *rproc; const struct imx_dsp_rproc_dcfg *dsp_dcfg; struct clk_bulk_data clks[DSP_RPROC_CLK_MAX]; @@ -192,9 +194,7 @@ static int imx8mp_dsp_reset(struct imx_dsp_rproc *priv) /* Keep reset asserted for 10 cycles */ usleep_range(1, 2); - regmap_update_bits(priv->regmap, IMX8M_AudioDSP_REG2, - IMX8M_AudioDSP_REG2_RUNSTALL, - IMX8M_AudioDSP_REG2_RUNSTALL); + reset_control_assert(priv->run_stall); /* Take the DSP out of reset and keep stalled for FW loading */ pwrctl = readl(dap + IMX8M_DAP_PWRCTL); @@ -231,13 +231,9 @@ static int imx8ulp_dsp_reset(struct imx_dsp_rproc *priv) /* Specific configuration for i.MX8MP */ static const struct imx_rproc_dcfg dsp_rproc_cfg_imx8mp = { - .src_reg = IMX8M_AudioDSP_REG2, - .src_mask = IMX8M_AudioDSP_REG2_RUNSTALL, - .src_start = 0, - .src_stop = IMX8M_AudioDSP_REG2_RUNSTALL, .att = imx_dsp_rproc_att_imx8mp, .att_size = ARRAY_SIZE(imx_dsp_rproc_att_imx8mp), - .method = IMX_RPROC_MMIO, + .method = IMX_RPROC_RESET_CONTROLLER, }; static const struct imx_dsp_rproc_dcfg imx_dsp_rproc_cfg_imx8mp = { @@ -329,6 +325,9 @@ static int imx_dsp_rproc_start(struct rproc *rproc) true, rproc->bootaddr); break; + case IMX_RPROC_RESET_CONTROLLER: + ret = reset_control_deassert(priv->run_stall); + break; default: return -EOPNOTSUPP; } @@ -369,6 +368,9 @@ static int imx_dsp_rproc_stop(struct rproc *rproc) false, rproc->bootaddr); break; + case IMX_RPROC_RESET_CONTROLLER: + ret = reset_control_assert(priv->run_stall); + break; default: return -EOPNOTSUPP; } @@ -995,6 +997,13 @@ static int imx_dsp_rproc_detect_mode(struct imx_dsp_rproc *priv) priv->regmap = regmap; break; + case IMX_RPROC_RESET_CONTROLLER: + priv->run_stall = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(priv->run_stall)) { + dev_err(dev, "Failed to get DSP reset control\n"); + return PTR_ERR(priv->run_stall); + } + break; default: ret = -EOPNOTSUPP; break; diff --git a/drivers/remoteproc/imx_rproc.h b/drivers/remoteproc/imx_rproc.h index 17a7d051c531..cfd38d37e146 100644 --- a/drivers/remoteproc/imx_rproc.h +++ b/drivers/remoteproc/imx_rproc.h @@ -24,6 +24,8 @@ enum imx_rproc_method { IMX_RPROC_SMC, /* Through System Control Unit API */ IMX_RPROC_SCU_API, + /* Through Reset Controller API */ + IMX_RPROC_RESET_CONTROLLER, }; /* dcfg flags */