From patchwork Sun Feb 22 17:51:03 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sylvain Rochet X-Patchwork-Id: 5862381 Return-Path: X-Original-To: patchwork-linux-arm@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 526FEBF440 for ; Sun, 22 Feb 2015 17:54:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6F620205B1 for ; Sun, 22 Feb 2015 17:54:50 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 92FB020592 for ; Sun, 22 Feb 2015 17:54:49 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YPahC-0003Yt-R2; Sun, 22 Feb 2015 17:51:58 +0000 Received: from mx-guillaumet.finsecur.com ([91.217.234.131] helo=guillaumet.finsecur.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YPags-0003Om-A8 for linux-arm-kernel@lists.infradead.org; Sun, 22 Feb 2015 17:51:40 +0000 Received: from [172.16.8.13] (helo=spice.lan) by guillaumet.finsecur.com with esmtps (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1YPagM-000BIG-4f; Sun, 22 Feb 2015 18:51:06 +0100 Received: from gradator by spice.lan with local (Exim 4.84) (envelope-from ) id 1YPagL-0004ji-SA; Sun, 22 Feb 2015 18:51:05 +0100 From: Sylvain Rochet To: Boris Brezillon , David Airlie , dri-devel@lists.freedesktop.org, Nicolas Ferre , Jean-Christophe Plagniol-Villard , Alexandre Belloni , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Daniel Vetter , Kevin Hilman , Wenyou Yang , Andrzej Hajda Date: Sun, 22 Feb 2015 18:51:03 +0100 Message-Id: <1424627464-16869-2-git-send-email-sylvain.rochet@finsecur.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1424627464-16869-1-git-send-email-sylvain.rochet@finsecur.com> References: <1424627464-16869-1-git-send-email-sylvain.rochet@finsecur.com> X-SA-Exim-Connect-IP: 172.16.8.13 X-SA-Exim-Mail-From: sylvain.rochet@finsecur.com X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Subject: [PATCHv3 1/2] drm: atmel-hlcdc: Add PM suspend/resume support X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on guillaumet.finsecur.com) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150222_095138_560165_239441E1 X-CRM114-Status: GOOD ( 11.51 ) X-Spam-Score: -0.7 (/) Cc: Sylvain Rochet X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP On suspend: switch off CRTC if not already suspended with runtime PM On resume: switch on CRTC if we were not already suspended from runtime PM while suspending. Signed-off-by: Sylvain Rochet Reviewed-by: Andrzej Hajda --- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 47 ++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c index 22c3cca..c4bb1f9 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c @@ -559,6 +559,52 @@ static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static int atmel_hlcdc_dc_drm_suspend(struct device *dev) +{ + struct drm_device *drm_dev = dev_get_drvdata(dev); + struct drm_crtc *crtc; + + if (pm_runtime_suspended(dev)) + return 0; + + drm_modeset_lock_all(drm_dev); + list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { + struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; + if (crtc->enabled) { + crtc_funcs->disable(crtc); + /* save enable state for resume */ + crtc->enabled = true; + } + } + drm_modeset_unlock_all(drm_dev); + return 0; +} + +static int atmel_hlcdc_dc_drm_resume(struct device *dev) +{ + struct drm_device *drm_dev = dev_get_drvdata(dev); + struct drm_crtc *crtc; + + if (pm_runtime_suspended(dev)) + return 0; + + drm_modeset_lock_all(drm_dev); + list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { + struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; + if (crtc->enabled) { + crtc->enabled = false; + crtc_funcs->enable(crtc); + } + } + drm_modeset_unlock_all(drm_dev); + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(atmel_hlcdc_dc_drm_pm_ops, + atmel_hlcdc_dc_drm_suspend, atmel_hlcdc_dc_drm_resume); + static const struct of_device_id atmel_hlcdc_dc_of_match[] = { { .compatible = "atmel,hlcdc-display-controller" }, { }, @@ -569,6 +615,7 @@ static struct platform_driver atmel_hlcdc_dc_platform_driver = { .remove = atmel_hlcdc_dc_drm_remove, .driver = { .name = "atmel-hlcdc-display-controller", + .pm = &atmel_hlcdc_dc_drm_pm_ops, .of_match_table = atmel_hlcdc_dc_of_match, }, };