From patchwork Thu Mar 5 05:01:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Wu X-Patchwork-Id: 28524 X-Patchwork-Delegate: g.liakhovetski@gmx.de Received: from mail.tu-berlin.de ([130.149.7.33]) by www.linuxtv.org with esmtp (Exim 4.72) (envelope-from ) id 1YTNt3-0004ZU-RH; Thu, 05 Mar 2015 05:59:53 +0100 X-tubIT-Incoming-IP: 209.132.180.67 Received: from vger.kernel.org ([209.132.180.67]) by mail.tu-berlin.de (exim-4.72/mailfrontend-5) with esmtp id 1YTNt1-0006Wt-7Q; Thu, 05 Mar 2015 05:59:53 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752403AbbCEE7t (ORCPT + 1 other); Wed, 4 Mar 2015 23:59:49 -0500 Received: from nasmtp01.atmel.com ([192.199.1.245]:25436 "EHLO DVREDG01.corp.atmel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752074AbbCEE7t (ORCPT ); Wed, 4 Mar 2015 23:59:49 -0500 Received: from apsmtp01.atmel.com (10.168.254.30) by DVREDG01.corp.atmel.com (10.42.103.30) with Microsoft SMTP Server (TLS) id 14.2.347.0; Wed, 4 Mar 2015 21:59:42 -0700 Received: from melon.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.2.347.0; Thu, 5 Mar 2015 13:03:48 +0800 From: Josh Wu To: Linux Media Mailing List , "Guennadi Liakhovetski" CC: , Laurent Pinchart , Josh Wu Subject: [PATCH 2/3] media: atmel-isi: add runtime pm support Date: Thu, 5 Mar 2015 13:01:00 +0800 Message-ID: <1425531661-20040-3-git-send-email-josh.wu@atmel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1425531661-20040-1-git-send-email-josh.wu@atmel.com> References: <1425531661-20040-1-git-send-email-josh.wu@atmel.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-PMX-Version: 6.0.0.2142326, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2015.3.5.44819 X-PMX-Spam: Gauge=IIIIIIIII, Probability=9%, Report=' MULTIPLE_RCPTS 0.1, HTML_00_01 0.05, HTML_00_10 0.05, MSGID_ADDED_BY_MTA 0.05, BODY_SIZE_3000_3999 0, BODY_SIZE_5000_LESS 0, BODY_SIZE_7000_LESS 0, REFERENCES 0, URI_ENDS_IN_HTML 0, __ANY_URI 0, __CP_URI_IN_BODY 0, __CT 0, __CT_TEXT_PLAIN 0, __DATE_TZ_HK 0, __HAS_FROM 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __HAS_X_MAILING_LIST 0, __IN_REP_TO 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __MULTIPLE_RCPTS_CC_X2 0, __REFERENCES 0, __SANE_MSGID 0, __SUBJ_ALPHA_END 0, __TO_MALFORMED_2 0, __URI_NO_WWW 0, __URI_NS ' The runtime pm resume/suspend will enable/disable pclk (ISI peripheral clock). And we need to call rumtime_pm_get/put_sync function to make pm resume/suspend. Signed-off-by: Josh Wu --- drivers/media/platform/soc_camera/atmel-isi.c | 36 ++++++++++++++++++++++++--- 1 file changed, 32 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c index eb179e7..4a384f1 100644 --- a/drivers/media/platform/soc_camera/atmel-isi.c +++ b/drivers/media/platform/soc_camera/atmel-isi.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -386,9 +387,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count) struct atmel_isi *isi = ici->priv; int ret; - ret = clk_prepare_enable(isi->pclk); - if (ret) - return ret; + pm_runtime_get_sync(ici->v4l2_dev.dev); /* Reset ISI */ ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET); @@ -450,7 +449,7 @@ static void stop_streaming(struct vb2_queue *vq) if (ret < 0) dev_err(icd->parent, "Disable ISI timed out\n"); - clk_disable_unprepare(isi->pclk); + pm_runtime_put_sync(ici->v4l2_dev.dev); } static struct vb2_ops isi_video_qops = { @@ -1042,6 +1041,9 @@ static int atmel_isi_probe(struct platform_device *pdev) soc_host->v4l2_dev.dev = &pdev->dev; soc_host->nr = pdev->id; + pm_suspend_ignore_children(&pdev->dev, true); + pm_runtime_enable(&pdev->dev); + if (isi->pdata.asd_sizes) { soc_host->asd = isi->pdata.asd; soc_host->asd_sizes = isi->pdata.asd_sizes; @@ -1055,6 +1057,7 @@ static int atmel_isi_probe(struct platform_device *pdev) return 0; err_register_soc_camera_host: + pm_runtime_disable(&pdev->dev); err_req_irq: err_ioremap: vb2_dma_contig_cleanup_ctx(isi->alloc_ctx); @@ -1067,6 +1070,30 @@ err_alloc_ctx: return ret; } +static int atmel_isi_runtime_suspend(struct device *dev) +{ + struct soc_camera_host *soc_host = to_soc_camera_host(dev); + struct atmel_isi *isi = container_of(soc_host, + struct atmel_isi, soc_host); + + clk_disable_unprepare(isi->pclk); + + return 0; +} +static int atmel_isi_runtime_resume(struct device *dev) +{ + struct soc_camera_host *soc_host = to_soc_camera_host(dev); + struct atmel_isi *isi = container_of(soc_host, + struct atmel_isi, soc_host); + + return clk_prepare_enable(isi->pclk); +} + +static const struct dev_pm_ops atmel_isi_dev_pm_ops = { + SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend, + atmel_isi_runtime_resume, NULL) +}; + static const struct of_device_id atmel_isi_of_match[] = { { .compatible = "atmel,at91sam9g45-isi" }, { } @@ -1079,6 +1106,7 @@ static struct platform_driver atmel_isi_driver = { .name = "atmel_isi", .owner = THIS_MODULE, .of_match_table = of_match_ptr(atmel_isi_of_match), + .pm = &atmel_isi_dev_pm_ops, }, };