From patchwork Thu May 16 21:40:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 10947053 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 231096C5 for ; Thu, 16 May 2019 21:40:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1157628BC9 for ; Thu, 16 May 2019 21:40:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 05BA428C10; Thu, 16 May 2019 21:40:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B2AB928BC9 for ; Thu, 16 May 2019 21:40:54 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EF09989467; Thu, 16 May 2019 21:40:53 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pf1-x443.google.com (mail-pf1-x443.google.com [IPv6:2607:f8b0:4864:20::443]) by gabe.freedesktop.org (Postfix) with ESMTPS id AD156897DC for ; Thu, 16 May 2019 21:40:50 +0000 (UTC) Received: by mail-pf1-x443.google.com with SMTP id g9so2507138pfo.11 for ; Thu, 16 May 2019 14:40:50 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=hVv4kB5Ecy4Nzot5JSmd+w2kmDQzag6YdAwhTawAS+o=; b=VMOmBV7RGRLoxMUBcTNSJm/tbRpYbxWrXOT0I6Ba38rHsqNDWc4UCldLWjJjkob0nP 81myP4D275sq/+omLl1inC1wA47kHoexxq8fzH9LmYs5hEa1Boyxwie+hTbOCl25kR9Y o6bzS/GxoWAecKATp715hZq5hnFFUg0hKdAr19GbSRpM7hH42h3+YlbHlMNFgE9x/6qK ZvsQZFakeuOjXqzGHj3ojBpTUKzMiwLpzXFTVdUUMeL/IR2QB+dPdL8Mar8Ub79QX1IQ 2K5zD37ZiqEIE9q+Ggv5cVLqLw0oFLwP/m0oXnWJoFdAfqVeuryNLMYdWShTRuDRpg2p a/rw== X-Gm-Message-State: APjAAAXwlESvKftqsGf15e4FLsSITFZ2iJkqzCeybY/oMRHkxMOrf5xY jAzkAMHo2tDdO1OUXXgo4sR+oQ== X-Google-Smtp-Source: APXvYqyP0E6DNadrM+r5JhT3uOu5deldF8xqqkH34aEOJ4KlNc8FJkCV2ERtDfIFBJk2wFdQq4Is2w== X-Received: by 2002:a63:d343:: with SMTP id u3mr53012185pgi.285.1558042850353; Thu, 16 May 2019 14:40:50 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:24fa:e766:52c9:e3b2]) by smtp.gmail.com with ESMTPSA id v4sm13127252pff.45.2019.05.16.14.40.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 May 2019 14:40:49 -0700 (PDT) From: Douglas Anderson To: Heiko Stuebner , Sandy Huang , Andrzej Hajda , Laurent Pinchart Subject: [PATCH v2 2/2] drm/rockchip: dw_hdmi: Handle suspend/resume Date: Thu, 16 May 2019 14:40:22 -0700 Message-Id: <20190516214022.65220-2-dianders@chromium.org> X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog In-Reply-To: <20190516214022.65220-1-dianders@chromium.org> References: <20190516214022.65220-1-dianders@chromium.org> MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=hVv4kB5Ecy4Nzot5JSmd+w2kmDQzag6YdAwhTawAS+o=; b=C2mEaCV5q7RRlPDkTl+jNc69GKmHQGbUzwdCXb4uJuIQRqjiwjE8vEVrEuUybINuD1 CaXvTTgS7AqB5rKqV9O2SfHGsVPYh/UdIAMeuPT128yOp4EI0fA8af3ZBM+HxlhYaScP IQMWJsOKUNzn9FS7aX/h9q0stQ3lFpm6IpUEk= X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Neil Armstrong , David Airlie , Douglas Anderson , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, mka@chromium.org, Sean Paul , linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP On Rockchip rk3288-based Chromebooks when you do a suspend/resume cycle: 1. You lose the ability to detect an HDMI device being plugged in. 2. If you're using the i2c bus built in to dw_hdmi then it stops working. Let's call the core dw-hdmi's suspend/resume functions to restore things. NOTE: in downstream Chrome OS (based on kernel 3.14) we used the "late/early" versions of suspend/resume because we found that the VOP was sometimes resuming before dw_hdmi and then calling into us before we were fully resumed. For now I have gone back to the normal suspend/resume because I can't reproduce the problems. Signed-off-by: Douglas Anderson Reviewed-by: Laurent Pinchart --- Changes in v2: - Add forgotten static (Laurent) - No empty stub for suspend (Laurent) drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c index 4cdc9f86c2e5..beffe44c248a 100644 --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c @@ -542,11 +542,23 @@ static int dw_hdmi_rockchip_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused dw_hdmi_rockchip_resume(struct device *dev) +{ + struct rockchip_hdmi *hdmi = dev_get_drvdata(dev); + + return dw_hdmi_resume(hdmi->hdmi); +} + +static const struct dev_pm_ops dw_hdmi_rockchip_pm = { + SET_SYSTEM_SLEEP_PM_OPS(NULL, dw_hdmi_rockchip_resume) +}; + struct platform_driver dw_hdmi_rockchip_pltfm_driver = { .probe = dw_hdmi_rockchip_probe, .remove = dw_hdmi_rockchip_remove, .driver = { .name = "dwhdmi-rockchip", + .pm = &dw_hdmi_rockchip_pm, .of_match_table = dw_hdmi_rockchip_dt_ids, }, };