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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD3B6C7618D for ; Mon, 20 Mar 2023 15:38:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233037AbjCTPiW (ORCPT ); Mon, 20 Mar 2023 11:38:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233225AbjCTPiB (ORCPT ); Mon, 20 Mar 2023 11:38:01 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD76B1ABD5 for ; Mon, 20 Mar 2023 08:29:34 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8D4DA61591 for ; Mon, 20 Mar 2023 15:29:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 99612C433D2; Mon, 20 Mar 2023 15:29:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1679326173; bh=NB1Q7IulvQPniPP+4NCmMV/y61f7GD5w4fbuVKrTEzc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fkGBQX/lf1H7EzOYBtaWcaHz5alkrvjjUFZkOt8B+AOIPS3zzd+c2F8oesMiMViIb Pgku7HhG7i56VJzvsG5NMW4nrE3OLvlLeC1gpsEPU1gRdfCqkQ1wakwC8CvAvu26kL pPzRGD+b4nAgCx1BK/X3e1kRth0OeIaDB0cFlYo4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mario Limonciello , Jun Lei , Qingqing Zhuo , Wesley Chalmers , Daniel Wheeler , Alex Deucher Subject: [PATCH 6.2 170/211] drm/amd/display: Do not set DRR on pipe Commit Date: Mon, 20 Mar 2023 15:55:05 +0100 Message-Id: <20230320145520.564490628@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230320145513.305686421@linuxfoundation.org> References: <20230320145513.305686421@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Wesley Chalmers commit 56574f89dbd84004c3fd6485bcaafb5aa9b8be14 upstream. [WHY] Writing to DRR registers such as OTG_V_TOTAL_MIN on the same frame as a pipe commit can cause underflow. Cc: stable@vger.kernel.org Cc: Mario Limonciello Reviewed-by: Jun Lei Acked-by: Qingqing Zhuo Signed-off-by: Wesley Chalmers Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c | 3 --- 1 file changed, 3 deletions(-) --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c @@ -992,8 +992,5 @@ void dcn30_prepare_bandwidth(struct dc * dc->clk_mgr->funcs->set_max_memclk(dc->clk_mgr, dc->clk_mgr->bw_params->clk_table.entries[dc->clk_mgr->bw_params->clk_table.num_entries - 1].memclk_mhz); dcn20_prepare_bandwidth(dc, context); - - dc_dmub_srv_p_state_delegate(dc, - context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching, context); }