From patchwork Tue Mar 10 12:38:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 229790 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5BD76C10F27 for ; Tue, 10 Mar 2020 12:42:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 264CD24686 for ; Tue, 10 Mar 2020 12:42:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583844143; bh=8dCuR1dZj5sYFg9M7hSWyym7Z6pdPopjdgIRORNr4Uo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=a53geU1dK204O/REI58qIpMD4GhJ+vQO26sXqWohzMGrRH5DPgf0Nf6NFgRwk/Wzw AYsmS8uGjeb8pUSZQy+0V3NRcalMnIUDpvWXU0kFbMMQc3JBa4dM1MHy2skqOm6nzO lUgzlOMhQ90vYGZX9r61zaYeqdIrT2Ci+ltRCUh0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726647AbgCJMmW (ORCPT ); Tue, 10 Mar 2020 08:42:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:42224 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726545AbgCJMmU (ORCPT ); Tue, 10 Mar 2020 08:42:20 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4E25C24686; Tue, 10 Mar 2020 12:42:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583844139; bh=8dCuR1dZj5sYFg9M7hSWyym7Z6pdPopjdgIRORNr4Uo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hXXnaaCHJGlT+JJ/nNAJM49do/Ej4VAKdRQmzryVgB8+Xpe59TDcLxLjM8q9hBLXI o/mKsFxphn6shjAIrTQnLLnVwuGSlIHZ/kpG8Zrz70v1dqk3rs56YA256UM3+ky69O EzShoIIuv9PrNrvNRU3qKOr3yOrFbIx/c4Qr3t/U= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Harigovindan P , Rob Clark , Sasha Levin Subject: [PATCH 4.4 44/72] drm/msm/dsi: save pll state before dsi host is powered off Date: Tue, 10 Mar 2020 13:38:57 +0100 Message-Id: <20200310123612.221962160@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200310123601.053680753@linuxfoundation.org> References: <20200310123601.053680753@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Harigovindan P [ Upstream commit a1028dcfd0dd97884072288d0c8ed7f30399b528 ] Save pll state before dsi host is powered off. Without this change some register values gets resetted. Signed-off-by: Harigovindan P Signed-off-by: Rob Clark Signed-off-by: Sasha Levin --- drivers/gpu/drm/msm/dsi/dsi_manager.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c index 439dfb69e2ef8..34220df1265f5 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c @@ -434,6 +434,7 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge) struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1); struct mipi_dsi_host *host = msm_dsi->host; struct drm_panel *panel = msm_dsi->panel; + struct msm_dsi_pll *src_pll; bool is_dual_dsi = IS_DUAL_DSI(); int ret; @@ -467,6 +468,10 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge) id, ret); } + /* Save PLL status if it is a clock source */ + src_pll = msm_dsi_phy_get_pll(msm_dsi->phy); + msm_dsi_pll_save_state(src_pll); + ret = msm_dsi_host_power_off(host); if (ret) pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);