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Received: from AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) by DB8PR04MB6825.eurprd04.prod.outlook.com (2603:10a6:10:112::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8182.20; Mon, 25 Nov 2024 09:33:43 +0000 Received: from AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::d1ce:ea15:6648:6f90]) by AM7PR04MB7046.eurprd04.prod.outlook.com ([fe80::d1ce:ea15:6648:6f90%6]) with mapi id 15.20.8182.019; Mon, 25 Nov 2024 09:33:43 +0000 From: Liu Ying To: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org Cc: p.zabel@pengutronix.de, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, glx@linutronix.de, vkoul@kernel.org, kishon@kernel.org, aisheng.dong@nxp.com, agx@sigxcpu.org, francesco@dolcini.it, frank.li@nxp.com, dmitry.baryshkov@linaro.org Subject: [PATCH v4 05/19] dt-bindings: display: imx: Add i.MX8qxp Display Controller AXI performance counter Date: Mon, 25 Nov 2024 17:33:02 +0800 Message-Id: <20241125093316.2357162-6-victor.liu@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241125093316.2357162-1-victor.liu@nxp.com> References: <20241125093316.2357162-1-victor.liu@nxp.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SG2PR01CA0131.apcprd01.prod.exchangelabs.com (2603:1096:4:40::35) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) 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: AM7PR04MB7046:EE_|DB8PR04MB6825:EE_ X-MS-Office365-Filtering-Correlation-Id: 54b585d1-1b3e-4d9f-8c2f-08dd0d3440fe X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|52116014|7416014|1800799024|366016|38350700014; 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charset="utf-8" i.MX8qxp Display Controller contains a AXI performance counter which allows measurement of average bandwidth and latency during operation. Signed-off-by: Liu Ying Reviewed-by: Rob Herring (Arm) --- v4: * Collect Rob's R-b tag. v3: * New patch. (Rob) ...sl,imx8qxp-dc-axi-performance-counter.yaml | 57 +++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8q= xp-dc-axi-performance-counter.yaml diff --git a/Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-a= xi-performance-counter.yaml b/Documentation/devicetree/bindings/display/imx= /fsl,imx8qxp-dc-axi-performance-counter.yaml new file mode 100644 index 000000000000..1d6501afc7f2 --- /dev/null +++ b/Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-dc-axi-perf= ormance-counter.yaml @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/imx/fsl,imx8qxp-dc-axi-performa= nce-counter.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale i.MX8qxp Display Controller AXI Performance Counter + +description: | + Performance counters are provided to allow measurement of average bandwi= dth + and latency during operation. The following features are supported: + + * Manual and timer controlled measurement mode. + + * Measurement counters: + - GLOBAL_COUNTER for overall measurement time + - BUSY_COUNTER for number of data bus busy cycles + - DATA_COUNTER for number of data transfer cycles + - TRANSFER_COUNTER for number of transfers + - ADDRBUSY_COUNTER for number of address bus busy cycles + - LATENCY_COUNTER for average latency + + * Counter overflow detection. + + * Outstanding Transfer Counters (OTC) which are used for latency measure= ment + have to run immediately after reset, but can be disabled by software w= hen + there is no need for latency measurement. + +maintainers: + - Liu Ying + +properties: + compatible: + const: fsl,imx8qxp-dc-axi-performance-counter + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + +required: + - compatible + - reg + - clocks + +additionalProperties: false + +examples: + - | + #include + + pmu@5618f000 { + compatible =3D "fsl,imx8qxp-dc-axi-performance-counter"; + reg =3D <0x5618f000 0x90>; + clocks =3D <&dc0_lpcg IMX_LPCG_CLK_5>; + }; --=20 2.34.1