From patchwork Tue May 26 08:00:09 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Wu X-Patchwork-Id: 6478541 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id DE62BC0020 for ; Tue, 26 May 2015 07:57:56 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E1452201F5 for ; Tue, 26 May 2015 07:57:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 868B820392 for ; Tue, 26 May 2015 07:57:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751611AbbEZH53 (ORCPT ); Tue, 26 May 2015 03:57:29 -0400 Received: from [212.144.249.242] ([212.144.249.242]:36414 "EHLO eusmtp01.atmel.com" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751760AbbEZH52 (ORCPT ); Tue, 26 May 2015 03:57:28 -0400 Received: from apsmtp01.atmel.com (10.168.254.30) by eusmtp01.atmel.com (10.161.101.30) with Microsoft SMTP Server id 14.3.235.1; Tue, 26 May 2015 09:57:06 +0200 Received: from melon.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.3.235.1; Tue, 26 May 2015 15:56:26 +0800 From: Josh Wu To: Guennadi Liakhovetski , Laurent Pinchart CC: Linux Media Mailing List , Nicolas Ferre , , Josh Wu Subject: [PATCH v4 1/2] media: atmel-isi: add runtime pm support Date: Tue, 26 May 2015 16:00:09 +0800 Message-ID: <1432627211-4338-2-git-send-email-josh.wu@atmel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1432627211-4338-1-git-send-email-josh.wu@atmel.com> References: <1432627211-4338-1-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-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The runtime pm resume/suspend will enable/disable pclk (ISI peripheral clock). And we need to call runtime_pm_get_sync()/runtime_pm_put() when we need access ISI registers. In atmel_isi_probe(), remove the isi disable code as in the moment ISI peripheral clock is not enable yet. In the meantime, as clock_start()/clock_stop() is used to control the mclk not ISI peripheral clock. So move this to start[stop]_streaming() function. Signed-off-by: Josh Wu --- Changes in v4: - need to call pm_runtime_disable() in atmel_isi_remove(). - merged the patch which remove isi disable code in atmel_isi_probe() as isi peripherial clock is not enabled in this moment. - refine the commit log Changes in v3: None Changes in v2: - merged v1 two patch into one. - use runtime_pm_put() instead of runtime_pm_put_sync() - enable peripheral clock before access ISI registers. drivers/media/platform/soc_camera/atmel-isi.c | 54 +++++++++++++++++++++++---- 1 file changed, 46 insertions(+), 8 deletions(-) diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c index 2879026..194e875 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 @@ -386,6 +387,8 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count) struct atmel_isi *isi = ici->priv; int ret; + pm_runtime_get_sync(ici->v4l2_dev.dev); + /* Reset ISI */ ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET); if (ret < 0) { @@ -445,6 +448,8 @@ static void stop_streaming(struct vb2_queue *vq) ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE); if (ret < 0) dev_err(icd->parent, "Disable ISI timed out\n"); + + pm_runtime_put(ici->v4l2_dev.dev); } static struct vb2_ops isi_video_qops = { @@ -516,7 +521,13 @@ static int isi_camera_set_fmt(struct soc_camera_device *icd, if (mf->code != xlate->code) return -EINVAL; + /* Enable PM and peripheral clock before operate isi registers */ + pm_runtime_get_sync(ici->v4l2_dev.dev); + ret = configure_geometry(isi, pix->width, pix->height, xlate->code); + + pm_runtime_put(ici->v4l2_dev.dev); + if (ret < 0) return ret; @@ -736,14 +747,9 @@ static int isi_camera_clock_start(struct soc_camera_host *ici) struct atmel_isi *isi = ici->priv; int ret; - ret = clk_prepare_enable(isi->pclk); - if (ret) - return ret; - if (!IS_ERR(isi->mck)) { ret = clk_prepare_enable(isi->mck); if (ret) { - clk_disable_unprepare(isi->pclk); return ret; } } @@ -758,7 +764,6 @@ static void isi_camera_clock_stop(struct soc_camera_host *ici) if (!IS_ERR(isi->mck)) clk_disable_unprepare(isi->mck); - clk_disable_unprepare(isi->pclk); } static unsigned int isi_camera_poll(struct file *file, poll_table *pt) @@ -855,9 +860,14 @@ static int isi_camera_set_bus_param(struct soc_camera_device *icd) cfg1 |= ISI_CFG1_THMASK_BEATS_16; + /* Enable PM and peripheral clock before operate isi registers */ + pm_runtime_get_sync(ici->v4l2_dev.dev); + isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); isi_writel(isi, ISI_CFG1, cfg1); + pm_runtime_put(ici->v4l2_dev.dev); + return 0; } @@ -889,6 +899,7 @@ static int atmel_isi_remove(struct platform_device *pdev) sizeof(struct fbd) * MAX_BUFFER_NUM, isi->p_fb_descriptors, isi->fb_descriptors_phys); + pm_runtime_disable(&pdev->dev); return 0; } @@ -1027,8 +1038,6 @@ static int atmel_isi_probe(struct platform_device *pdev) if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10) isi->width_flags |= 1 << 9; - isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); - irq = platform_get_irq(pdev, 0); if (IS_ERR_VALUE(irq)) { ret = irq; @@ -1049,6 +1058,9 @@ 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; @@ -1062,6 +1074,7 @@ 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); @@ -1074,6 +1087,30 @@ 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" }, { } @@ -1085,6 +1122,7 @@ static struct platform_driver atmel_isi_driver = { .driver = { .name = "atmel_isi", .of_match_table = of_match_ptr(atmel_isi_of_match), + .pm = &atmel_isi_dev_pm_ops, }, };