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=-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 B34E0C83008 for ; Tue, 28 Apr 2020 18:51:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 94E8F20575 for ; Tue, 28 Apr 2020 18:51:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588099919; bh=5rg1mbDvVPgqk2qdN1TJwA1lpQ8pvGe+EL4GcEoRhmI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DMyc1dMAsLfxIDJLC3F0yXgQ1Mz1i/JSR8WzHErcKuliTwyDGpjutyBEszrOLHe2h jCC4lQd0OYUgGGz0qQrZjdQPygj4wjRbbNTt+qVr1HVRoL3VQk7eAIdLAL2tkXareS qFmdty6oO72N8rP7JjRS3M0644mCe5Z1Adseo/vY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729327AbgD1Sgm (ORCPT ); Tue, 28 Apr 2020 14:36:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:54218 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730387AbgD1Sgl (ORCPT ); Tue, 28 Apr 2020 14:36:41 -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 4A4152085B; Tue, 28 Apr 2020 18:36:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588099000; bh=5rg1mbDvVPgqk2qdN1TJwA1lpQ8pvGe+EL4GcEoRhmI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WUF11odStdhHw88SkrjapEZ+MaR9kYCSHLPx3XE3b/yGrpMNaU7wd0ddjhHD5raoe ID2+cBbxRaX8Ysek4VyM1D5BT3K4ovmC9HD9ZYJ0jFgb9G0XEniNGf5u0C1td7ko8D Kga9PNYB7FVFQgDYGTz0mCdS9RcQktdQnOH3fcQo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yongqiang Sun , Tony Cheng , Rodrigo Siqueira , Alex Deucher , Sasha Levin Subject: [PATCH 5.4 044/168] drm/amd/display: Not doing optimize bandwidth if flip pending. Date: Tue, 28 Apr 2020 20:23:38 +0200 Message-Id: <20200428182237.448944669@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200428182231.704304409@linuxfoundation.org> References: <20200428182231.704304409@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: Yongqiang Sun [ Upstream commit 9941b8129030c9202aaf39114477a0e58c0d6ffc ] [Why] In some scenario like 1366x768 VSR enabled connected with a 4K monitor and playing 4K video in clone mode, underflow will be observed due to decrease dppclk when previouse surface scan isn't finished [How] In this use case, surface flip is switching between 4K and 1366x768, 1366x768 needs smaller dppclk, and when decrease the clk and previous surface scan is for 4K and scan isn't done, underflow will happen. Not doing optimize bandwidth in case of flip pending. Signed-off-by: Yongqiang Sun Reviewed-by: Tony Cheng Acked-by: Rodrigo Siqueira Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 71c574d1e8be2..2028dc017f7a0 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -1182,6 +1182,26 @@ bool dc_commit_state(struct dc *dc, struct dc_state *context) return (result == DC_OK); } +static bool is_flip_pending_in_pipes(struct dc *dc, struct dc_state *context) +{ + int i; + struct pipe_ctx *pipe; + + for (i = 0; i < MAX_PIPES; i++) { + pipe = &context->res_ctx.pipe_ctx[i]; + + if (!pipe->plane_state) + continue; + + /* Must set to false to start with, due to OR in update function */ + pipe->plane_state->status.is_flip_pending = false; + dc->hwss.update_pending_status(pipe); + if (pipe->plane_state->status.is_flip_pending) + return true; + } + return false; +} + bool dc_post_update_surfaces_to_stream(struct dc *dc) { int i; @@ -1192,6 +1212,9 @@ bool dc_post_update_surfaces_to_stream(struct dc *dc) post_surface_trace(dc); + if (is_flip_pending_in_pipes(dc, context)) + return true; + for (i = 0; i < dc->res_pool->pipe_count; i++) if (context->res_ctx.pipe_ctx[i].stream == NULL || context->res_ctx.pipe_ctx[i].plane_state == NULL) { -- 2.20.1