From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 90A1939A80F; Thu, 15 Jan 2026 12:46:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768481185; cv=none; b=mpH83j+bgFt/VWKdrtbAkyPnrVJ1EDd0eCPrTDFNfK6lAz3pRN+6wh2hV08LMRBa+o2+PO4ExVG92Bu4SQ3ZQq9OKzqmoMGISZ+MpLo77IQyInea8+Db8lYclZiCr8X1FS/WekBKIkZcssZQvX0qiQ8Dw4+i60YHrJisraTIYt0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768481185; c=relaxed/simple; bh=6fIe+CKhVPb9zKkl6TpSxLoTVrXdIhXwOHagdDYSr1M=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=V9alNm0PR1tvZOcfeDCAkP9TsuNYrSZaeyNfAgVzsBvo5RQerr8Vq66Kx9bApVPtKStkOi5SyD8xtXTn5oSQ3VyLa+KShMF6JANQnblEf/ubR5ENRTp0ZoUrsEKx8RIovl2nIoLkhXqgwKyN/oSU9+OB/QSiVX1n4Bx5Ucza9UY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=ZRiSZ10N; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="ZRiSZ10N" Received: from [192.168.88.20] (91-158-153-178.elisa-laajakaista.fi [91.158.153.178]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 9E45C24A; Thu, 15 Jan 2026 13:45:50 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1768481152; bh=6fIe+CKhVPb9zKkl6TpSxLoTVrXdIhXwOHagdDYSr1M=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ZRiSZ10NeJn0LmSacdWT1ax9Z23BxT8vgG+e8/sQzoWbzgwngpH/l8by0ir01jBP0 EdgVSKqMIHeyiOSGDrNZrdfB3sdQL38X1yQegHepXsiKuRSBnC+6OyrY725g1vqaMT +6Ub87uEHt0Pny+6Zx3iamZjH3F4wIfBWgg73yxo= Message-ID: <57b147bc-cdce-4033-8320-ce41b501519c@ideasonboard.com> Date: Thu, 15 Jan 2026 14:46:14 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 18/19] media: ti: j721e-csi2rx: Support runtime suspend To: Rishikesh Donadkar Cc: y-abhilashchandra@ti.com, devarsht@ti.com, s-jain1@ti.com, vigneshr@ti.com, mchehab@kernel.org, robh@kernel.org, krzk+dt@kernel.org, p.zabel@pengutronix.de, conor+dt@kernel.org, sakari.ailus@linux.intel.com, hverkuil-cisco@xs4all.nl, jai.luthra@ideasonboard.com, changhuang.liang@starfivetech.com, jack.zhu@starfivetech.com, sjoerd@collabora.com, dan.carpenter@linaro.org, hverkuil+cisco@kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, jai.luthra@linux.dev, laurent.pinchart@ideasonboard.com, mripard@kernel.org References: <20251230083220.2405247-1-r-donadkar@ti.com> <20251230083220.2405247-19-r-donadkar@ti.com> From: Tomi Valkeinen Content-Language: en-US Autocrypt: addr=tomi.valkeinen@ideasonboard.com; keydata= xsFNBE6ms0cBEACyizowecZqXfMZtnBniOieTuFdErHAUyxVgtmr0f5ZfIi9Z4l+uUN4Zdw2 wCEZjx3o0Z34diXBaMRJ3rAk9yB90UJAnLtb8A97Oq64DskLF81GCYB2P1i0qrG7UjpASgCA Ru0lVvxsWyIwSfoYoLrazbT1wkWRs8YBkkXQFfL7Mn3ZMoGPcpfwYH9O7bV1NslbmyJzRCMO eYV258gjCcwYlrkyIratlHCek4GrwV8Z9NQcjD5iLzrONjfafrWPwj6yn2RlL0mQEwt1lOvn LnI7QRtB3zxA3yB+FLsT1hx0va6xCHpX3QO2gBsyHCyVafFMrg3c/7IIWkDLngJxFgz6DLiA G4ld1QK/jsYqfP2GIMH1mFdjY+iagG4DqOsjip479HCWAptpNxSOCL6z3qxCU8MCz8iNOtZk DYXQWVscM5qgYSn+fmMM2qN+eoWlnCGVURZZLDjg387S2E1jT/dNTOsM/IqQj+ZROUZuRcF7 0RTtuU5q1HnbRNwy+23xeoSGuwmLQ2UsUk7Q5CnrjYfiPo3wHze8avK95JBoSd+WIRmV3uoO rXCoYOIRlDhg9XJTrbnQ3Ot5zOa0Y9c4IpyAlut6mDtxtKXr4+8OzjSVFww7tIwadTK3wDQv Bus4jxHjS6dz1g2ypT65qnHen6mUUH63lhzewqO9peAHJ0SLrQARAQABzTBUb21pIFZhbGtl aW5lbiA8dG9taS52YWxrZWluZW5AaWRlYXNvbmJvYXJkLmNvbT7CwY4EEwEIADgWIQTEOAw+ ll79gQef86f6PaqMvJYe9QUCX/HruAIbAwULCQgHAgYVCgkICwIEFgIDAQIeAQIXgAAKCRD6 PaqMvJYe9WmFD/99NGoD5lBJhlFDHMZvO+Op8vCwnIRZdTsyrtGl72rVh9xRfcSgYPZUvBuT VDxE53mY9HaZyu1eGMccYRBaTLJSfCXl/g317CrMNdY0k40b9YeIX10feiRYEWoDIPQ3tMmA 0nHDygzcnuPiPT68JYZ6tUOvAt7r6OX/litM+m2/E9mtp8xCoWOo/kYO4mOAIoMNvLB8vufi uBB4e/AvAjtny4ScuNV5c5q8MkfNIiOyag9QCiQ/JfoAqzXRjVb4VZG72AKaElwipiKCWEcU R4+Bu5Qbaxj7Cd36M/bI54OrbWWETJkVVSV1i0tghCd6HHyquTdFl7wYcz6cL1hn/6byVnD+ sR3BLvSBHYp8WSwv0TCuf6tLiNgHAO1hWiQ1pOoXyMEsxZlgPXT+wb4dbNVunckwqFjGxRbl Rz7apFT/ZRwbazEzEzNyrBOfB55xdipG/2+SmFn0oMFqFOBEszXLQVslh64lI0CMJm2OYYe3 PxHqYaztyeXsx13Bfnq9+bUynAQ4uW1P5DJ3OIRZWKmbQd/Me3Fq6TU57LsvwRgE0Le9PFQs dcP2071rMTpqTUteEgODJS4VDf4lXJfY91u32BJkiqM7/62Cqatcz5UWWHq5xeF03MIUTqdE qHWk3RJEoWHWQRzQfcx6Fn2fDAUKhAddvoopfcjAHfpAWJ+ENc7BTQROprNHARAAx0aat8GU hsusCLc4MIxOQwidecCTRc9Dz/7U2goUwhw2O5j9TPqLtp57VITmHILnvZf6q3QAho2QMQyE DDvHubrdtEoqaaSKxKkFie1uhWNNvXPhwkKLYieyL9m2JdU+b88HaDnpzdyTTR4uH7wk0bBa KbTSgIFDDe5lXInypewPO30TmYNkFSexnnM3n1PBCqiJXsJahE4ZQ+WnV5FbPUj8T2zXS2xk 0LZ0+DwKmZ0ZDovvdEWRWrz3UzJ8DLHb7blPpGhmqj3ANXQXC7mb9qJ6J/VSl61GbxIO2Dwb xPNkHk8fwnxlUBCOyBti/uD2uSTgKHNdabhVm2dgFNVuS1y3bBHbI/qjC3J7rWE0WiaHWEqy UVPk8rsph4rqITsj2RiY70vEW0SKePrChvET7D8P1UPqmveBNNtSS7In+DdZ5kUqLV7rJnM9 /4cwy+uZUt8cuCZlcA5u8IsBCNJudxEqBG10GHg1B6h1RZIz9Q9XfiBdaqa5+CjyFs8ua01c 9HmyfkuhXG2OLjfQuK+Ygd56mV3lq0aFdwbaX16DG22c6flkkBSjyWXYepFtHz9KsBS0DaZb 4IkLmZwEXpZcIOQjQ71fqlpiXkXSIaQ6YMEs8WjBbpP81h7QxWIfWtp+VnwNGc6nq5IQDESH mvQcsFS7d3eGVI6eyjCFdcAO8eMAEQEAAcLBXwQYAQIACQUCTqazRwIbDAAKCRD6PaqMvJYe 9fA7EACS6exUedsBKmt4pT7nqXBcRsqm6YzT6DeCM8PWMTeaVGHiR4TnNFiT3otD5UpYQI7S suYxoTdHrrrBzdlKe5rUWpzoZkVK6p0s9OIvGzLT0lrb0HC9iNDWT3JgpYDnk4Z2mFi6tTbq xKMtpVFRA6FjviGDRsfkfoURZI51nf2RSAk/A8BEDDZ7lgJHskYoklSpwyrXhkp9FHGMaYII m9EKuUTX9JPDG2FTthCBrdsgWYPdJQvM+zscq09vFMQ9Fykbx5N8z/oFEUy3ACyPqW2oyfvU CH5WDpWBG0s5BALp1gBJPytIAd/pY/5ZdNoi0Cx3+Z7jaBFEyYJdWy1hGddpkgnMjyOfLI7B CFrdecTZbR5upjNSDvQ7RG85SnpYJTIin+SAUazAeA2nS6gTZzumgtdw8XmVXZwdBfF+ICof 92UkbYcYNbzWO/GHgsNT1WnM4sa9lwCSWH8Fw1o/3bX1VVPEsnESOfxkNdu+gAF5S6+I6n3a ueeIlwJl5CpT5l8RpoZXEOVtXYn8zzOJ7oGZYINRV9Pf8qKGLf3Dft7zKBP832I3PQjeok7F yjt+9S+KgSFSHP3Pa4E7lsSdWhSlHYNdG/czhoUkSCN09C0rEK93wxACx3vtxPLjXu6RptBw 3dRq7n+mQChEB1am0BueV1JZaBboIL0AGlSJkm23kw== In-Reply-To: <20251230083220.2405247-19-r-donadkar@ti.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi, On 30/12/2025 10:32, Rishikesh Donadkar wrote: > From: Jai Luthra > > Add support for runtime power-management to enable powering off the > shared power domain between Cadence CSI2RX and TI CSI2RX wrapper when > the device(s) are not in use. > > When powering off the IP, the PSI-L endpoint loses the paired DMA > channels. Thus we have to release the DMA channels at runtime suspend > and request them again at resume. > > Tested-by: Rishikesh Donadkar > Reviewed-by: Rishikesh Donadkar > Signed-off-by: Jai Luthra > Co-developed-by: Rishikesh Donadkar > Signed-off-by: Rishikesh Donadkar > --- > drivers/media/platform/ti/Kconfig | 1 + > .../platform/ti/j721e-csi2rx/j721e-csi2rx.c | 59 +++++++++++++++---- > 2 files changed, 50 insertions(+), 10 deletions(-) Should pixel interface reset belong to the runtime suspend/resume functions? (Not a suggestion, just a question =). Reviewed-by: Tomi Valkeinen Tomi > diff --git a/drivers/media/platform/ti/Kconfig b/drivers/media/platform/ti/Kconfig > index 3bc4aa35887e6..a808063e24779 100644 > --- a/drivers/media/platform/ti/Kconfig > +++ b/drivers/media/platform/ti/Kconfig > @@ -70,6 +70,7 @@ config VIDEO_TI_J721E_CSI2RX > depends on VIDEO_CADENCE_CSI2RX > depends on PHY_CADENCE_DPHY_RX || COMPILE_TEST > depends on ARCH_K3 || COMPILE_TEST > + depends on PM > select VIDEOBUF2_DMA_CONTIG > select V4L2_FWNODE > help > diff --git a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c > index 3922bd67e78da..72da58738e16e 100644 > --- a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c > +++ b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c > @@ -13,6 +13,7 @@ > #include > #include > #include > +#include > #include > > #include > @@ -964,12 +965,16 @@ static int ti_csi2rx_start_streaming(struct vb2_queue *vq, unsigned int count) > unsigned long flags; > int ret = 0; > > + ret = pm_runtime_resume_and_get(csi->dev); > + if (ret) > + return ret; > + > spin_lock_irqsave(&dma->lock, flags); > if (list_empty(&dma->queue)) > ret = -EIO; > spin_unlock_irqrestore(&dma->lock, flags); > if (ret) > - return ret; > + goto err; > > ret = video_device_pipeline_start(&ctx->vdev, &csi->pipe); > if (ret) > @@ -991,6 +996,8 @@ static int ti_csi2rx_start_streaming(struct vb2_queue *vq, unsigned int count) > writel(0, csi->shim + SHIM_DMACNTX(ctx->idx)); > err: > ti_csi2rx_cleanup_buffers(ctx, VB2_BUF_STATE_QUEUED); > + pm_runtime_put(csi->dev); > + > return ret; > } > > @@ -1022,6 +1029,7 @@ static void ti_csi2rx_stop_streaming(struct vb2_queue *vq) > > ti_csi2rx_stop_dma(ctx); > ti_csi2rx_cleanup_buffers(ctx, VB2_BUF_STATE_ERROR); > + pm_runtime_put(csi->dev); > } > > static const struct vb2_ops csi_vb2_qops = { > @@ -1263,7 +1271,6 @@ static void ti_csi2rx_cleanup_notifier(struct ti_csi2rx_dev *csi) > > static void ti_csi2rx_cleanup_ctx(struct ti_csi2rx_ctx *ctx) > { > - dma_release_channel(ctx->dma.chan); > vb2_queue_release(&ctx->vidq); > > video_unregister_device(&ctx->vdev); > @@ -1283,7 +1290,7 @@ static int ti_csi2rx_init_vb2q(struct ti_csi2rx_ctx *ctx) > q->ops = &csi_vb2_qops; > q->mem_ops = &vb2_dma_contig_memops; > q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; > - q->dev = dmaengine_get_dma_device(ctx->dma.chan); > + q->dev = ctx->csi->dev; > q->lock = &ctx->mutex; > q->min_queued_buffers = 1; > q->allow_cache_hints = 1; > @@ -1497,21 +1504,46 @@ static int ti_csi2rx_init_ctx(struct ti_csi2rx_ctx *ctx) > spin_lock_init(&ctx->dma.lock); > ctx->dma.state = TI_CSI2RX_DMA_STOPPED; > > - ret = ti_csi2rx_init_dma(ctx); > + ret = ti_csi2rx_init_vb2q(ctx); > if (ret) > return ret; > > - ret = ti_csi2rx_init_vb2q(ctx); > - if (ret) > - goto cleanup_dma; > + return 0; > +} > + > +static int ti_csi2rx_runtime_suspend(struct device *dev) > +{ > + struct ti_csi2rx_dev *csi = dev_get_drvdata(dev); > + int i; > + > + if (csi->enable_count != 0) > + return -EBUSY; > + > + for (i = 0; i < csi->num_ctx; i++) > + dma_release_channel(csi->ctx[i].dma.chan); > > return 0; > +} > > -cleanup_dma: > - dma_release_channel(ctx->dma.chan); > - return ret; > +static int ti_csi2rx_runtime_resume(struct device *dev) > +{ > + struct ti_csi2rx_dev *csi = dev_get_drvdata(dev); > + unsigned int ret, i; > + > + for (i = 0; i < csi->num_ctx; i++) { > + ret = ti_csi2rx_init_dma(&csi->ctx[i]); > + if (ret) > + return ret; > + } > + > + return 0; > } > > +static const struct dev_pm_ops ti_csi2rx_pm_ops = { > + RUNTIME_PM_OPS(ti_csi2rx_runtime_suspend, ti_csi2rx_runtime_resume, > + NULL) > +}; > + > static int ti_csi2rx_probe(struct platform_device *pdev) > { > struct device_node *np = pdev->dev.of_node; > @@ -1569,6 +1601,8 @@ static int ti_csi2rx_probe(struct platform_device *pdev) > goto err_ctx; > } > > + pm_runtime_enable(csi->dev); > + > ret = ti_csi2rx_notifier_register(csi); > if (ret) > goto err_ctx; > @@ -1601,6 +1635,9 @@ static void ti_csi2rx_remove(struct platform_device *pdev) > struct ti_csi2rx_dev *csi = platform_get_drvdata(pdev); > unsigned int i; > > + if (!pm_runtime_status_suspended(&pdev->dev)) > + pm_runtime_set_suspended(&pdev->dev); > + > for (i = 0; i < csi->num_ctx; i++) > ti_csi2rx_cleanup_ctx(&csi->ctx[i]); > > @@ -1609,6 +1646,7 @@ static void ti_csi2rx_remove(struct platform_device *pdev) > mutex_destroy(&csi->mutex); > dma_free_coherent(csi->dev, csi->drain.len, csi->drain.vaddr, > csi->drain.paddr); > + pm_runtime_disable(&pdev->dev); > } > > static const struct of_device_id ti_csi2rx_of_match[] = { > @@ -1623,6 +1661,7 @@ static struct platform_driver ti_csi2rx_pdrv = { > .driver = { > .name = TI_CSI2RX_MODULE_NAME, > .of_match_table = ti_csi2rx_of_match, > + .pm = &ti_csi2rx_pm_ops, > }, > }; >