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charset="utf-8" Add reset ids used for EARC and DSP on i.MX8MP platform. 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 */ --=20 2.25.1 From nobody Thu Dec 18 16:15:17 2025 Received: from OSPPR02CU001.outbound.protection.outlook.com (mail-norwayeastazon11013052.outbound.protection.outlook.com [40.107.159.52]) (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 B1AA422AE73; 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charset="utf-8" On i.MX8MP we introduced support for using a reset controller to control DSP operation. This patch adds reset property which is required for i.MX8MP. Signed-off-by: Daniel Baluta Reviewed-by: Frank Li --- .../devicetree/bindings/dsp/fsl,dsp.yaml | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documenta= tion/devicetree/bindings/dsp/fsl,dsp.yaml index ab93ffd3d2e5..923e7f079f1b 100644 --- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml +++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml @@ -82,6 +82,13 @@ properties: description: Phandle to syscon block which provide access for processor enablement =20 + resets: + description: + A pair consisting of phandle to audio-blk-control and an index refer= encing + the DSP Run/Stall bit in audiomix registers. + See include/dt-bindings/reset/imx8mp-reset-audiomix.h for each index= meaning. + maxItems: 1 + required: - compatible - reg @@ -164,6 +171,16 @@ allOf: - const: txdb1 - const: rxdb0 - const: rxdb1 + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8mp-dsp + - fsl,imx8mp-hifi4 + then: + required: + - "resets" =20 additionalProperties: false =20 @@ -220,5 +237,5 @@ examples: <&mu2 3 0>; 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charset="utf-8" This change adds resets to dsp node in order to be able to control the dsp run/stall bit. 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/dt= s/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 =3D <&mu2 2 0>, <&mu2 2 1>, <&mu2 3 0>, <&mu2 3 1>; memory-region =3D <&dsp_reserved>; + resets =3D <&audio_blk_ctrl IMX8MP_AUDIOMIX_DSP>; status =3D "disabled"; }; }; --=20 2.25.1 From nobody Thu Dec 18 16:15:17 2025 Received: from DU2PR03CU002.outbound.protection.outlook.com (mail-northeuropeazon11012054.outbound.protection.outlook.com [52.101.66.54]) (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 6140722CBCB; 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charset="utf-8" This adds IMX8MP_AUDIOMIX_ prefix to internal macros in order to show that specific macros are related to audiomix. 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-im= x8mp-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 =20 -#define EARC 0x200 -#define EARC_RESET_MASK 0x3 +#define IMX8MP_AUDIOMIX_EARC_OFFSET 0x200 +#define IMX8MP_AUDIOMIX_EARC_RESET_MASK 0x3 =20 struct imx8mp_audiomix_reset { struct reset_controller_dev rcdev; @@ -35,8 +35,8 @@ static int imx8mp_audiomix_reset_assert(struct reset_cont= roller_dev *rcdev, =20 mask =3D BIT(id); spin_lock_irqsave(&priv->lock, flags); - reg =3D readl(reg_addr + EARC); - writel(reg & ~mask, reg_addr + EARC); + reg =3D readl(reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); + writel(reg & ~mask, reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); spin_unlock_irqrestore(&priv->lock, flags); =20 return 0; @@ -52,8 +52,8 @@ static int imx8mp_audiomix_reset_deassert(struct reset_co= ntroller_dev *rcdev, =20 mask =3D BIT(id); spin_lock_irqsave(&priv->lock, flags); - reg =3D readl(reg_addr + EARC); - writel(reg | mask, reg_addr + EARC); + reg =3D readl(reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); + writel(reg | mask, reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); spin_unlock_irqrestore(&priv->lock, flags); =20 return 0; @@ -78,7 +78,7 @@ static int imx8mp_audiomix_reset_probe(struct auxiliary_d= evice *adev, spin_lock_init(&priv->lock); =20 priv->rcdev.owner =3D THIS_MODULE; - priv->rcdev.nr_resets =3D fls(EARC_RESET_MASK); + priv->rcdev.nr_resets =3D fls(IMX8MP_AUDIOMIX_EARC_RESET_MASK); priv->rcdev.ops =3D &imx8mp_audiomix_reset_ops; priv->rcdev.of_node =3D dev->parent->of_node; priv->rcdev.dev =3D dev; --=20 2.25.1 From nobody Thu Dec 18 16:15:17 2025 Received: from OSPPR02CU001.outbound.protection.outlook.com (mail-norwayeastazon11013052.outbound.protection.outlook.com [40.107.159.52]) (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 836DF22CBEA; 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charset="utf-8" Current code supports EARC PHY Software Reset and EARC Software Reset but it is not easily extensible to more reset bits. 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 | 42 ++++++++++++++++++++------- 1 file changed, 32 insertions(+), 10 deletions(-) diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-im= x8mp-audiomix.c index 1fe21980a66c..17f78ccc7820 100644 --- a/drivers/reset/reset-imx8mp-audiomix.c +++ b/drivers/reset/reset-imx8mp-audiomix.c @@ -3,6 +3,7 @@ * Copyright 2024 NXP */ =20 +#include #include #include #include @@ -12,7 +13,24 @@ #include =20 #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[] =3D { + [IMX8MP_AUDIOMIX_EARC] =3D { + .offset =3D IMX8MP_AUDIOMIX_EARC_OFFSET, + .mask =3D IMX8MP_AUDIOMIX_EARC_RESET_MASK, + }, + [IMX8MP_AUDIOMIX_EARC_PHY] =3D { + .offset =3D IMX8MP_AUDIOMIX_EARC_OFFSET, + .mask =3D IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK, + }, +}; =20 struct imx8mp_audiomix_reset { struct reset_controller_dev rcdev; @@ -30,13 +48,15 @@ static int imx8mp_audiomix_reset_assert(struct reset_co= ntroller_dev *rcdev, { struct imx8mp_audiomix_reset *priv =3D to_imx8mp_audiomix_reset(rcdev); void __iomem *reg_addr =3D priv->base; - unsigned int mask, reg; + unsigned int mask, offset, reg; unsigned long flags; =20 - mask =3D BIT(id); + mask =3D reset_map[id].mask; + offset =3D reset_map[id].offset; + spin_lock_irqsave(&priv->lock, flags); - reg =3D readl(reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); - writel(reg & ~mask, reg_addr + IMX8MP_AUDIOMIX_EARC_OFFSET); + reg =3D readl(reg_addr + offset); + writel(reg & ~mask, reg_addr + offset); spin_unlock_irqrestore(&priv->lock, flags); =20 return 0; @@ -47,13 +67,15 @@ static int imx8mp_audiomix_reset_deassert(struct reset_= controller_dev *rcdev, { struct imx8mp_audiomix_reset *priv =3D to_imx8mp_audiomix_reset(rcdev); void __iomem *reg_addr =3D priv->base; - unsigned int mask, reg; + unsigned int mask, offset, reg; 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charset="utf-8" For EARC and EARC PHY the reset happens when clearing the reset bits. 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-im= x8mp-audiomix.c index 17f78ccc7820..42539cafbccc 100644 --- a/drivers/reset/reset-imx8mp-audiomix.c +++ b/drivers/reset/reset-imx8mp-audiomix.c @@ -19,16 +19,19 @@ struct imx8mp_reset_map { unsigned int offset; unsigned int mask; + bool active_low; }; =20 static const struct imx8mp_reset_map reset_map[] =3D { [IMX8MP_AUDIOMIX_EARC] =3D { .offset =3D IMX8MP_AUDIOMIX_EARC_OFFSET, .mask =3D IMX8MP_AUDIOMIX_EARC_RESET_MASK, + .active_low =3D true, }, [IMX8MP_AUDIOMIX_EARC_PHY] =3D { .offset =3D IMX8MP_AUDIOMIX_EARC_OFFSET, .mask =3D IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK, + .active_low =3D true, }, }; =20 @@ -43,42 +46,42 @@ static struct imx8mp_audiomix_reset *to_imx8mp_audiomix= _reset(struct reset_contr return container_of(rcdev, struct imx8mp_audiomix_reset, rcdev); } =20 -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 =3D to_imx8mp_audiomix_reset(rcdev); void __iomem *reg_addr =3D priv->base; - unsigned int mask, offset, reg; - unsigned long flags; + unsigned int mask, offset, active_low; + unsigned long reg, flags; =20 mask =3D reset_map[id].mask; offset =3D reset_map[id].offset; + active_low =3D reset_map[id].active_low; =20 spin_lock_irqsave(&priv->lock, flags); + reg =3D readl(reg_addr + offset); - writel(reg & ~mask, reg_addr + offset); + if (active_low ^ assert) + reg |=3D mask; + else + reg &=3D ~mask; + writel(reg, reg_addr + offset); + spin_unlock_irqrestore(&priv->lock, flags); =20 return 0; } =20 +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 *rcd= ev, unsigned long id) { - struct imx8mp_audiomix_reset *priv =3D to_imx8mp_audiomix_reset(rcdev); 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Wed, 19 Feb 2025 19:21:31 +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 15.20.8445.017; Wed, 19 Feb 2025 19:21:31 +0000 From: Daniel Baluta To: p.zabel@pengutronix.de, robh@kernel.org, shawnguo@kernel.org Cc: krzk+dt@kernel.org, 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, mathieu.poirier@linaro.org, shengjiu.wang@nxp.com, Frank.Li@nxp.com, peng.fan@nxp.com, laurentiu.mihalcea@nxp.com, iuliana.prodan@nxp.com, Daniel Baluta Subject: [PATCH v2 7/8] reset: imx8mp-audiomix: Add support for DSP run/stall Date: Wed, 19 Feb 2025 21:21:01 +0200 Message-Id: <20250219192102.423850-8-daniel.baluta@nxp.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250219192102.423850-1-daniel.baluta@nxp.com> References: <20250219192102.423850-1-daniel.baluta@nxp.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: VI1PR07CA0267.eurprd07.prod.outlook.com (2603:10a6:803:b4::34) To AS8PR04MB8247.eurprd04.prod.outlook.com (2603:10a6:20b:3f2::13) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS8PR04MB8247:EE_|VI0PR04MB10951:EE_ X-MS-Office365-Filtering-Correlation-Id: 84aa2202-abc2-426d-f657-08dd511a9d87 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|7416014|52116014|366016|10070799003; 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charset="utf-8" We can Run/Stall the DSP via audio block control bits found in audiomix. 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-im= x8mp-audiomix.c index 42539cafbccc..4a713b772429 100644 --- a/drivers/reset/reset-imx8mp-audiomix.c +++ b/drivers/reset/reset-imx8mp-audiomix.c @@ -16,6 +16,9 @@ #define IMX8MP_AUDIOMIX_EARC_RESET_MASK BIT(1) #define IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK BIT(2) =20 +#define IMX8MP_AUDIOMIX_DSP_OFFSET 0x108 +#define IMX8MP_AUDIOMIX_DSP_RUNSTALL_MASK BIT(5) + struct imx8mp_reset_map { unsigned int offset; unsigned int mask; @@ -33,6 +36,11 @@ static const struct imx8mp_reset_map reset_map[] =3D { .mask =3D IMX8MP_AUDIOMIX_EARC_PHY_RESET_MASK, .active_low =3D true, }, + [IMX8MP_AUDIOMIX_DSP] =3D { + .offset =3D IMX8MP_AUDIOMIX_DSP_OFFSET, + .mask =3D IMX8MP_AUDIOMIX_DSP_RUNSTALL_MASK, + .active_low =3D false, + }, }; =20 struct imx8mp_audiomix_reset { --=20 2.25.1 From nobody Thu Dec 18 16:15:17 2025 Received: from OSPPR02CU001.outbound.protection.outlook.com (mail-norwayeastazon11013052.outbound.protection.outlook.com [40.107.159.52]) (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 3F35E22D7AE; 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charset="utf-8" Use the reset controller API to control the DSP on i.MX8MP. This way we can have a better control of the resources and avoid using a syscon to access the audiomix bits. 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_ds= p_rproc.c index ea5024919c2f..631563e4f86d 100644 --- a/drivers/remoteproc/imx_dsp_rproc.c +++ b/drivers/remoteproc/imx_dsp_rproc.c @@ -19,6 +19,7 @@ #include #include #include +#include #include =20 #include "imx_rproc.h" @@ -111,6 +112,7 @@ enum imx_dsp_rp_mbox_messages { */ struct imx_dsp_rproc { struct regmap *regmap; + struct reset_control *reset; 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); =20 - regmap_update_bits(priv->regmap, IMX8M_AudioDSP_REG2, - IMX8M_AudioDSP_REG2_RUNSTALL, - IMX8M_AudioDSP_REG2_RUNSTALL); + reset_control_assert(priv->reset); =20 /* Take the DSP out of reset and keep stalled for FW loading */ pwrctl =3D readl(dap + IMX8M_DAP_PWRCTL); @@ -231,13 +231,9 @@ static int imx8ulp_dsp_reset(struct imx_dsp_rproc *pri= v) =20 /* Specific configuration for i.MX8MP */ static const struct imx_rproc_dcfg dsp_rproc_cfg_imx8mp =3D { - .src_reg =3D IMX8M_AudioDSP_REG2, - .src_mask =3D IMX8M_AudioDSP_REG2_RUNSTALL, - .src_start =3D 0, - .src_stop =3D IMX8M_AudioDSP_REG2_RUNSTALL, .att =3D imx_dsp_rproc_att_imx8mp, .att_size =3D ARRAY_SIZE(imx_dsp_rproc_att_imx8mp), - .method =3D IMX_RPROC_MMIO, + .method =3D IMX_RPROC_RESET_CONTROLLER, }; =20 static const struct imx_dsp_rproc_dcfg imx_dsp_rproc_cfg_imx8mp =3D { @@ -329,6 +325,9 @@ static int imx_dsp_rproc_start(struct rproc *rproc) true, rproc->bootaddr); break; + case IMX_RPROC_RESET_CONTROLLER: + ret =3D reset_control_deassert(priv->reset); + 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 =3D reset_control_assert(priv->reset); + break; default: return -EOPNOTSUPP; } @@ -995,6 +997,13 @@ static int imx_dsp_rproc_detect_mode(struct imx_dsp_rp= roc *priv) =20 priv->regmap =3D regmap; break; + case IMX_RPROC_RESET_CONTROLLER: + priv->reset =3D devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(priv->reset)) { + dev_err(dev, "Failed to get DSP reset control\n"); + return PTR_ERR(priv->reset); + } + break; default: ret =3D -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, }; =20 /* dcfg flags */ --=20 2.25.1