From patchwork Wed Mar 2 02:11:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brian Norris X-Patchwork-Id: 12765386 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 674B8C433FE for ; Wed, 2 Mar 2022 02:11:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=QsDc+u69dL3+8+wrfaY5ZgLMYUITiqAr8oBZTWrSmgI=; b=EfE4Cx10M/YSXX WVjFckgf9whtGNOKqajVhLP945DYPc5h5ghGJxQttIJ0fXTUEUKEfAtgBIlyOj/mbzaAdWL3vKNXC uOLXIB5PeR2LtcVWyjQwz13MotbwL17kdy9uLTse7JAkL8qyFAwBKXGv5Br8GuMtaiF2lNFcskZt6 IkCICKbMZYmVQqgVhcBeC39eaYaB/izj/MVERiHiUa2k6haDCHt9gdSiigG754kaS77oiUNvY6rC5 Vpm99r1M4zT4JlXE4D40triP4Tn4rb3JTJD2MFjQaiF5+P4EHsbE1I91Ja20QUjnXbE/T4Bi72KNx 7R8bcS4Nabs5iz+uhJyA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nPET6-0013N4-1R; Wed, 02 Mar 2022 02:11:56 +0000 Received: from mail-pf1-x430.google.com ([2607:f8b0:4864:20::430]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nPET3-0013Le-8G for linux-rockchip@lists.infradead.org; Wed, 02 Mar 2022 02:11:54 +0000 Received: by mail-pf1-x430.google.com with SMTP id y11so575500pfa.6 for ; Tue, 01 Mar 2022 18:11:52 -0800 (PST) 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=bN6s6TEZphRwWI80xPm4aDtJet1ujkPpuwP31QhXI/4=; b=Gi3ddJmZGU2EBvfYqXHrtA6sMRGzkmAZ0ATThinzacPTB+38oNB9Joc0MX5AaExxvf MnAEUHidDLO8fgXj+3CVfa620VMN43lZ1TjqxDWvnHrFvaZpRFmiWRl7nQoeoWpbPDxw 8498XmP5qcqTmjP9MchQOKq88Y1K1krgttZz4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=bN6s6TEZphRwWI80xPm4aDtJet1ujkPpuwP31QhXI/4=; b=O12vr+0wbPieuLeIbeDwFM0wpepTt9WHGpmpLBk4x5oVVSwJxBIWlPjcdHjT5nVVKd wl6QnZQtAcwIxAhEB/QOqjSHavQSQfBu9LuUrEaeYrOzkIFy7lTudVIi2nwlx3cI5HGf jVJTXUmZJK2V0cPv8strSI2EJlDnbQgSY3sbpTmghPO7dkC6rsdlWiLtDnTiunchVXaP ipgIqrHVYoCEK6AbdszsDGJk/XAmzm6Do42DthsmthaY4ogh1P0kGoIdEZoo7CMH8wmE aEXVf3SG/T8twh1AXGawynbf0U6MZJeHkWXho5I1WEfFLfPqJyoQmtNXDR2mF2QlBmAA NUdA== X-Gm-Message-State: AOAM531lmF0UBDA39rSqlZfl7+xGSK08v6HB4IXcaf604UwQpS3dxePQ gkdfyIsoxI7l+K7MZcehoIEg7A== X-Google-Smtp-Source: ABdhPJxqAYWE+06jubmS6vphEWSmGaG3d5IxrqcrnICb1nu8otRMzyUve+NDlL+vrTTB6Qb3KPoVww== X-Received: by 2002:a63:f745:0:b0:373:8350:889f with SMTP id f5-20020a63f745000000b003738350889fmr24420532pgk.620.1646187112488; Tue, 01 Mar 2022 18:11:52 -0800 (PST) Received: from localhost ([2620:15c:202:201:ddf3:7c12:38c:3c61]) by smtp.gmail.com with UTF8SMTPSA id f15-20020a056a0022cf00b004f3b99a6c43sm18651273pfj.219.2022.03.01.18.11.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 01 Mar 2022 18:11:51 -0800 (PST) From: Brian Norris To: Andrzej Hajda , Neil Armstrong Cc: Jonas Karlman , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Sean Paul , Jernej Skrabec , Doug Anderson , linux-rockchip@lists.infradead.org, Laurent Pinchart , Brian Norris Subject: [PATCH v4 2/2] drm/bridge: analogix_dp: Enable autosuspend Date: Tue, 1 Mar 2022 18:11:39 -0800 Message-Id: <20220301181107.v4.2.I48b18ab197c9b649d376cf8cfd934e59d338f86d@changeid> X-Mailer: git-send-email 2.35.1.574.g5d30c73bfb-goog In-Reply-To: <20220301181107.v4.1.I773a08785666ebb236917b0c8e6c05e3de471e75@changeid> References: <20220301181107.v4.1.I773a08785666ebb236917b0c8e6c05e3de471e75@changeid> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220301_181153_318681_F290E92D X-CRM114-Status: GOOD ( 12.43 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org DP AUX transactions can consist of many short operations. There's no need to power things up/down in short intervals. I pick an arbitrary 100ms; for the systems I'm testing (Rockchip RK3399), runtime-PM transitions only take a few microseconds. Signed-off-by: Brian Norris Reviewed-by: Douglas Anderson --- Changes in v4: - call pm_runtime_mark_last_busy() and pm_runtime_dont_use_autosuspend() - drop excess pm references around drm_get_edid(), now that we grab and hold in the dp-aux helper Changes in v3: - New in v3 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 16be279aed2c..b248d352f2bd 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1119,9 +1119,7 @@ static int analogix_dp_get_modes(struct drm_connector *connector) return 0; } - pm_runtime_get_sync(dp->dev); edid = drm_get_edid(connector, &dp->aux.ddc); - pm_runtime_put(dp->dev); if (edid) { drm_connector_update_edid_property(&dp->connector, edid); @@ -1642,7 +1640,8 @@ static ssize_t analogix_dpaux_transfer(struct drm_dp_aux *aux, ret = analogix_dp_transfer(dp, msg); out: - pm_runtime_put(dp->dev); + pm_runtime_mark_last_busy(dp->dev); + pm_runtime_put_autosuspend(dp->dev); return ret; } @@ -1775,6 +1774,8 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev) if (ret) return ret; + pm_runtime_use_autosuspend(dp->dev); + pm_runtime_set_autosuspend_delay(dp->dev, 100); pm_runtime_enable(dp->dev); ret = analogix_dp_create_bridge(drm_dev, dp); @@ -1786,6 +1787,7 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev) return 0; err_disable_pm_runtime: + pm_runtime_dont_use_autosuspend(dp->dev); pm_runtime_disable(dp->dev); drm_dp_aux_unregister(&dp->aux); @@ -1804,6 +1806,7 @@ void analogix_dp_unbind(struct analogix_dp_device *dp) } drm_dp_aux_unregister(&dp->aux); + pm_runtime_dont_use_autosuspend(dp->dev); pm_runtime_disable(dp->dev); } EXPORT_SYMBOL_GPL(analogix_dp_unbind);