From nobody Mon Feb 9 18:21:30 2026 Received: from lelvem-ot01.ext.ti.com (lelvem-ot01.ext.ti.com [198.47.23.234]) (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 E1FC830DD17; Mon, 8 Sep 2025 13:49:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.23.234 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757339378; cv=none; b=C4ru122DuG+xMO4qD739qNcu9XVOTl2bXshhkFY5uTlvK01+KQVIkBmbcBGmXfA6pRz6ML2BvItXQ8O0aGkI0+qHD+wYTGF5uDhH6Tvu1tKydOV6EHlWyBtSt/Ocr57mvBzY1URzEFw1U5xyypxq5kLDnKiT0+eOI1IfgjLd58w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757339378; c=relaxed/simple; bh=/SFNNjBysf4MtKDycfVorq4iHYNflhmDhyrfpX7gQQo=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=aPHqTZzbqBRLP+TiQTifm3XDw1QqKnGnArqNlxjA75JB4q+yzgh4mamXr/eVIEiTo9wk+XXJaluT9Z5SDBM8rHP2G+dVNvJIm4KVpLFfo7L2skB9it3tQ1Zga/SnA6gcZ7KAfEV3P6qD90E/3UuKQi/4wDPyaWC0y2X3PHFcWoc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=Qn1X9e1d; arc=none smtp.client-ip=198.47.23.234 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="Qn1X9e1d" Received: from lelvem-sh02.itg.ti.com ([10.180.78.226]) by lelvem-ot01.ext.ti.com (8.15.2/8.15.2) with ESMTP id 588DnNCC3876183; Mon, 8 Sep 2025 08:49:23 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1757339363; bh=3bX2jf2XpmbkGJJTLxxVCqtC2/29zjLOEdV8ZDd6Xtw=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=Qn1X9e1dNFklhAKBZKV61oB5/OzYCvGZY29EwHSqFL5yaZfrQ0fdcvNPgq0fXXLRq QidUL9E19PDaIkFz3K19MyhIoGTs3wxYIr/sW0kwvnmtvmV03aPtuY417MgJrodSj7 t6HEwKvm349DU014stiBbNTLB5lyuWPn56/Ab8fY= Received: from DLEE108.ent.ti.com (dlee108.ent.ti.com [157.170.170.38]) by lelvem-sh02.itg.ti.com (8.18.1/8.18.1) with ESMTPS id 588DnNio2997944 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA256 bits=128 verify=FAIL); Mon, 8 Sep 2025 08:49:23 -0500 Received: from DLEE103.ent.ti.com (157.170.170.33) by DLEE108.ent.ti.com (157.170.170.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.55; Mon, 8 Sep 2025 08:49:22 -0500 Received: from lelvem-mr06.itg.ti.com (10.180.75.8) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.55 via Frontend Transport; Mon, 8 Sep 2025 08:49:22 -0500 Received: from ws.dhcp.ti.com (ws.dhcp.ti.com [172.24.233.149]) by lelvem-mr06.itg.ti.com (8.18.1/8.18.1) with ESMTP id 588DlU98689321; Mon, 8 Sep 2025 08:49:16 -0500 From: Rishikesh Donadkar To: , , CC: , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v6 15/16] media: ti: j721e-csi2rx: Support runtime suspend Date: Mon, 8 Sep 2025 19:17:28 +0530 Message-ID: <20250908134729.3940366-16-r-donadkar@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250908134729.3940366-1-r-donadkar@ti.com> References: <20250908134729.3940366-1-r-donadkar@ti.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea Content-Type: text/plain; charset="utf-8" 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 Signed-off-by: Rishikesh Donadkar --- drivers/media/platform/ti/Kconfig | 1 + .../platform/ti/j721e-csi2rx/j721e-csi2rx.c | 55 ++++++++++++++++++- 2 files changed, 54 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/ti/Kconfig b/drivers/media/platform/ti/= Kconfig index 3bc4aa35887e..a808063e2477 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/driver= s/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c index aded410515a2..3405e68932dd 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 =20 #include @@ -963,12 +964,16 @@ static int ti_csi2rx_start_streaming(struct vb2_queue= *vq, unsigned int count) unsigned long flags; int ret =3D 0; =20 + ret =3D pm_runtime_resume_and_get(csi->dev); + if (ret) + return ret; + spin_lock_irqsave(&dma->lock, flags); if (list_empty(&dma->queue)) ret =3D -EIO; spin_unlock_irqrestore(&dma->lock, flags); if (ret) - return ret; + goto err; =20 ret =3D video_device_pipeline_start(&ctx->vdev, &csi->pipe); if (ret) @@ -1024,6 +1029,8 @@ 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; } =20 @@ -1055,6 +1062,7 @@ static void ti_csi2rx_stop_streaming(struct vb2_queue= *vq) =20 ti_csi2rx_stop_dma(ctx); ti_csi2rx_cleanup_buffers(ctx, VB2_BUF_STATE_ERROR); + pm_runtime_put(csi->dev); } =20 static const struct vb2_ops csi_vb2_qops =3D { @@ -1263,7 +1271,9 @@ static void ti_csi2rx_cleanup_notifier(struct ti_csi2= rx_dev *csi) =20 static void ti_csi2rx_cleanup_ctx(struct ti_csi2rx_ctx *ctx) { - dma_release_channel(ctx->dma.chan); + if (!pm_runtime_status_suspended(ctx->csi->dev)) + dma_release_channel(ctx->dma.chan); + vb2_queue_release(&ctx->vidq); =20 video_unregister_device(&ctx->vdev); @@ -1519,6 +1529,39 @@ static int ti_csi2rx_init_ctx(struct ti_csi2rx_ctx *= ctx) return ret; } =20 +static int ti_csi2rx_runtime_suspend(struct device *dev) +{ + struct ti_csi2rx_dev *csi =3D dev_get_drvdata(dev); + int i; + + if (csi->enable_count !=3D 0) + return -EBUSY; + + for (i =3D 0; i < csi->num_ctx; i++) + dma_release_channel(csi->ctx[i].dma.chan); + + return 0; +} + +static int ti_csi2rx_runtime_resume(struct device *dev) +{ + struct ti_csi2rx_dev *csi =3D dev_get_drvdata(dev); + int ret, i; + + for (i =3D 0; i < csi->num_ctx; i++) { + ret =3D ti_csi2rx_init_dma(&csi->ctx[i]); + if (ret) + return ret; + } + + return 0; +} + +static const struct dev_pm_ops ti_csi2rx_pm_ops =3D { + 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 =3D pdev->dev.of_node; @@ -1585,6 +1628,10 @@ static int ti_csi2rx_probe(struct platform_device *p= dev) goto err_notifier; } =20 + pm_runtime_set_active(csi->dev); + pm_runtime_enable(csi->dev); + pm_request_idle(csi->dev); + return 0; =20 err_notifier: @@ -1615,6 +1662,9 @@ 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); + pm_runtime_set_suspended(&pdev->dev); + } =20 static const struct of_device_id ti_csi2rx_of_match[] =3D { @@ -1629,6 +1679,7 @@ static struct platform_driver ti_csi2rx_pdrv =3D { .driver =3D { .name =3D TI_CSI2RX_MODULE_NAME, .of_match_table =3D ti_csi2rx_of_match, + .pm =3D &ti_csi2rx_pm_ops, }, }; =20 --=20 2.34.1