From mboxrd@z Thu Jan 1 00:00:00 1970 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=-13.0 required=3.0 tests=BAYES_00,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 73BA1C433F8 for ; Mon, 27 Jul 2020 14:13:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 48C9620838 for ; Mon, 27 Jul 2020 14:13:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595859220; bh=n20vUVyaRvsUd/t9DuMuWWnuh8R37KmCQ7mLLzqKSB4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qWRn9Or2FzQ48WrANsUEoNUYheAhcZ/bLHeVbEe+bBIng4FUkZ9MOrsJm08TNiYE9 ZfxlSzEQ29wDKa4c0m8ZDaHBfbwOw1M5Dv2pmbsGv+fHIpubTpx80IzrxnlYzpYiue 1NjzVmGhmurksjYkINMhsuAAZZbQmkdbCQIehDaE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730369AbgG0ONj (ORCPT ); Mon, 27 Jul 2020 10:13:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:38726 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730393AbgG0ONi (ORCPT ); Mon, 27 Jul 2020 10:13:38 -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 18FB92073E; Mon, 27 Jul 2020 14:13:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595859217; bh=n20vUVyaRvsUd/t9DuMuWWnuh8R37KmCQ7mLLzqKSB4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xuxsxxtjuejGOAxLQTdtiCFiz8z6m+rIX0WILgnEdUHC9gzfVH+Mz8YPHhjenkyrZ +Q9nOcivAQ6JX22JgAPYpVb42uCcCjkCe2m7id91DiWY8NBQe0Hi8SR+JOjKnDgdvs +NvQPUHvXJmNhdRIhpI/9qwMPaX7fNJth1I3fHjc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Jerry (Fangzhi) Zuo" , Hersen Wu , Aurabindo Pillai , Alex Deucher , Sasha Levin Subject: [PATCH 5.4 023/138] drm/amd/display: Check DMCU Exists Before Loading Date: Mon, 27 Jul 2020 16:03:38 +0200 Message-Id: <20200727134926.508432798@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200727134925.228313570@linuxfoundation.org> References: <20200727134925.228313570@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jerry (Fangzhi) Zuo [ Upstream commit 17bdb4a82fe5014c8aa5b2103c80c5729744a096 ] Signed-off-by: Jerry (Fangzhi) Zuo Reviewed-by: Hersen Wu Acked-by: Aurabindo Pillai Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 4fad0b603b3ab..c7d8edf450d3c 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -928,9 +928,14 @@ static int dm_late_init(void *handle) struct dmcu_iram_parameters params; unsigned int linear_lut[16]; int i; - struct dmcu *dmcu = adev->dm.dc->res_pool->dmcu; + struct dmcu *dmcu = NULL; bool ret; + if (!adev->dm.fw_dmcu) + return detect_mst_link_for_all_connectors(adev->ddev); + + dmcu = adev->dm.dc->res_pool->dmcu; + for (i = 0; i < 16; i++) linear_lut[i] = 0xFFFF * i / 15; -- 2.25.1