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Wed, 11 Nov 2020 11:11:45 +0000 From: Daniel Baluta To: shawnguo@kernel.org Cc: s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, paul.olaru@nxp.com, shengjiu.wang@nxp.com Subject: [PATCH RESEND 0/3] Allow on demand channel request / free Date: Wed, 11 Nov 2020 13:11:15 +0200 Message-Id: <20201111111118.21824-1-daniel.baluta@nxp.com> X-Mailer: git-send-email 2.17.1 Content-Type: text/plain X-Originating-IP: [83.217.231.2] X-ClientProxiedBy: AM0PR10CA0005.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:17c::15) To VI1PR0401MB2287.eurprd04.prod.outlook.com (2603:10a6:800:2e::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from fsr-ub1864-103.ro-buh02.nxp.com (83.217.231.2) by AM0PR10CA0005.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:208:17c::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3541.21 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9a04323a-4349-4e8f-641d-08d886329302 X-MS-Exchange-CrossTenant-AuthSource: VI1PR0401MB2287.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Nov 2020 11:11:45.1301 (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: jCGhtGD7O0bS2Omwmx7qo9ivyCZJqka03RsH42Hm5++7nILcs027GrU+Za5n1N4R0IaEJgIlI8l5zpdjaFCmwg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB5774 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Requesting an mailbox channel will call mailbox's startup function. startup function calls pm_runtime_get_sync which increments device usage count and will keep the device active. Specifically, mailbox clock will be always ON when a mailbox channel is requested. For this, reason we introduce a way to request/free IMX DSP channels on demand to save power when the channels are not used. First two patches are doing code refactoring preparing the path for 3rd patch which exports functions for on demand channel request/free Daniel Baluta (3): firmware: imx: Introduce imx_dsp_setup_channels firmware: imx: Save channel name for further use firmware: imx-dsp: Export functions to request/free channels drivers/firmware/imx/imx-dsp.c | 72 ++++++++++++++++++++++++-------- include/linux/firmware/imx/dsp.h | 10 +++++ 2 files changed, 64 insertions(+), 18 deletions(-) -- 2.17.1