From nobody Tue Apr 28 05:05:48 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56A98C43334 for ; Mon, 6 Jun 2022 07:24:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230389AbiFFHY2 (ORCPT ); Mon, 6 Jun 2022 03:24:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230381AbiFFHYZ (ORCPT ); Mon, 6 Jun 2022 03:24:25 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A31B31A800 for ; Mon, 6 Jun 2022 00:24:24 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id q12-20020a17090a304c00b001e2d4fb0eb4so17133017pjl.4 for ; Mon, 06 Jun 2022 00:24:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=pMfut4LPsHaQl9oSY0zIbRD7TwaINdF2fCPCCoRTmzk=; b=Jl/v7UQ2V39aHQrh/Am7iP+T7NGe3QacYFlH0Ig4qdL5AiB+Dp+T229S4wFwZMPQ6a xzAAgpFGOeVLZ775zebxoG+K4mBQu7CS7y83DrBE9t+waNPQ60EwDUxoWJ83nlU6/5t+ T3zL8AGrm6DrgAEMGw4ekxZLj1CTAdOkoGi6M= 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:mime-version :content-transfer-encoding; bh=pMfut4LPsHaQl9oSY0zIbRD7TwaINdF2fCPCCoRTmzk=; b=WlzusR873e+D3yMtE89vwTj09ov4NSS1OpNfvTjKqXv2X+Zd/PLp7ajuhLln8hKk35 m6bD/ZX3Cm5vUPZj31VGk7w0yD/ViPNQL21RyuixDibuhG4uPvFtd2rCXZnKBM5X9bUI saAiB+20oDTBl6siA0KdQJnjxk99o9B3Jmj1Pz+g1DjQiZDNmvoyLGz8ufss+SIh5cAY golcQw3nUSMz+HBV/RgFVJcQ2O/ChyElaaJeS6kNwEfCaVFM5aewoENE6A1Z0hMoD0oP mw1DWkCp4kiNeN8iUS23PUnp4j3AHLXAs0fwHpPPQzTxThcfPqBDe2X3E2RvoCob+/0N SMmA== X-Gm-Message-State: AOAM531WtiTS2sAtzH949k6c5PWZzotwwpK5Fy57aw8CZZfrmBARvahO D3A/9wZ1D+LYzSrBI6gSrv8JvQ== X-Google-Smtp-Source: ABdhPJwIbAPZl7VVoUAdeTLq7nntvE3YRj01MWcFW6M6bKPiVfbIr2+NrNIRF094+iw89O8FMIWWZg== X-Received: by 2002:a17:902:7202:b0:167:6548:3f3e with SMTP id ba2-20020a170902720200b0016765483f3emr10255212plb.98.1654500264178; Mon, 06 Jun 2022 00:24:24 -0700 (PDT) Received: from treapking.tpe.corp.google.com ([2401:fa00:1:10:e921:a124:f7a6:a292]) by smtp.gmail.com with ESMTPSA id o20-20020a635d54000000b003fae8a7e3e5sm9802731pgm.91.2022.06.06.00.24.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jun 2022 00:24:23 -0700 (PDT) From: Pin-Yen Lin To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter Cc: Allen Chen , Hsin-Yi Wang , Pin-Yen Lin , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/bridge: it6505: Power off downstream device in .atomic_enable Date: Mon, 6 Jun 2022 15:24:17 +0800 Message-Id: <20220606072417.328354-1-treapking@chromium.org> X-Mailer: git-send-email 2.36.1.255.ge46751e96f-goog MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Power off the downstream device in .atomic_enable callback, so the external display shows up again after changing resolution. Fixes: 46ca7da7f1e8 ("drm/bridge: it6505: Send DPCD SET_POWER to downstream= ") Signed-off-by: Pin-Yen Lin --- drivers/gpu/drm/bridge/ite-it6505.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/i= te-it6505.c index 4b673c4792d7..e5626035f311 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -2945,6 +2945,9 @@ static void it6505_bridge_atomic_enable(struct drm_br= idge *bridge, if (ret) dev_err(dev, "Failed to setup AVI infoframe: %d", ret); =20 + it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link, + DP_SET_POWER_D0); + it6505_update_video_parameter(it6505, mode); =20 ret =3D it6505_send_video_infoframe(it6505, &frame); --=20 2.36.1.255.ge46751e96f-goog