From patchwork Tue Mar 10 12:39:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 229466 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, USER_AGENT_GIT autolearn=unavailable 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 52B48C18E5B for ; Tue, 10 Mar 2020 13:34:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2C36920675 for ; Tue, 10 Mar 2020 13:34:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583847280; bh=zBcaWmOWFsefY4orvoW3vKI4XM4VDFpW+rPtM3jGBuE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xZXFnb2jjVDSrY2sqggAGo6cFHuhbF2vOcmKsXz35Et4mgFXOaRMrPJ0sJ+3tYv/h SbJiOCHqLg6uQvvA0gGfDpZoo4QcAVV70NA6fnQPte9m5D/oiyEPzKS22ozqx728nH F05lgNNa/UmoeBirKelCMPONVAMvpw7c0wq/guG4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727973AbgCJMqN (ORCPT ); Tue, 10 Mar 2020 08:46:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:49126 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727955AbgCJMqL (ORCPT ); Tue, 10 Mar 2020 08:46:11 -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 E04AE24695; Tue, 10 Mar 2020 12:46:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583844370; bh=zBcaWmOWFsefY4orvoW3vKI4XM4VDFpW+rPtM3jGBuE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SFh5vt9eFZ7P1uKUv4ExmMKi9FEzHKaZgH9eJrvgmJVHy7oRyXWz266UHMZ/7D/CW 7AP0lO577hyvrIyfQ4zHq0AetRQLFghgVwecFr2d+NjPhyoj1oINDH09NdLyMw5KT/ acQe4TgUwaRdswcKmrQi+2MXSFzn5lfTtgLcQBfs= 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 4.9 56/88] drm/msm/dsi: save pll state before dsi host is powered off Date: Tue, 10 Mar 2020 13:39:04 +0100 Message-Id: <20200310123620.058490663@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200310123606.543939933@linuxfoundation.org> References: <20200310123606.543939933@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 10d49d43c17eb..d46b9e75a8473 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c @@ -438,6 +438,7 @@ 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; @@ -471,6 +472,10 @@ 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);