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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 80D01C2BA83 for ; Fri, 14 Feb 2020 17:15:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4FAA5206CC for ; Fri, 14 Feb 2020 17:15:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581700541; bh=lbb8p6MEsHz1aytgvvoCCNt4UaPulBkyaxqYhVkjEcA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=RSbJUxg9WHAZpN/+0Xx3NcdOlmjzf8Dm0u0YVqJIA5ZYDxqdPhw15xc4G6nzLHrxC BTc60N63YpkJwqLWR/WhpMVHDrpZ/xp3pKGIwuHD6tcilKgDp5vqwQmPH/yw9BQRAK RJpqNVRVWIFzFhk3RJaJXR0lbQoKMa3sl+ZLCZ8s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403760AbgBNQMI (ORCPT ); Fri, 14 Feb 2020 11:12:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:36614 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391654AbgBNQKy (ORCPT ); Fri, 14 Feb 2020 11:10:54 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4D53624680; Fri, 14 Feb 2020 16:10:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696654; bh=lbb8p6MEsHz1aytgvvoCCNt4UaPulBkyaxqYhVkjEcA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QxHoDqkF65bJDjzaOxDG9OyjE943kQba/weJApi3BJKfPP+kECKPMD8lIH1Zd8NoW 6cZ94XhCr363G1Aii5xIfZ2Lpu12zKLBJQZjFZbWecQ5ZqIySNJSsqMQeNbxDSXq6o l7HYtNa+aheOW0U9qWwUNOlPrQ7QLWx9McNXlH7E= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Daniel Vetter , Alex Deucher , =?UTF-8?q?Michel=20D=C3=A4nzer?= , Daniel Vetter , Sasha Levin , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.4 429/459] radeon: insert 10ms sleep in dce5_crtc_load_lut Date: Fri, 14 Feb 2020 11:01:19 -0500 Message-Id: <20200214160149.11681-429-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214160149.11681-1-sashal@kernel.org> References: <20200214160149.11681-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Daniel Vetter [ Upstream commit ec3d65082d7dabad6fa8f66a8ef166f2d522d6b2 ] Per at least one tester this is enough magic to recover the regression introduced for some people (but not all) in commit b8e2b0199cc377617dc238f5106352c06dcd3fa2 Author: Peter Rosin Date: Tue Jul 4 12:36:57 2017 +0200 drm/fb-helper: factor out pseudo-palette which for radeon had the side-effect of refactoring out a seemingly redudant writing of the color palette. 10ms in a fairly slow modeset path feels like an acceptable form of duct-tape, so maybe worth a shot and see what sticks. Cc: Alex Deucher Cc: Michel Dänzer References: https://bugzilla.kernel.org/show_bug.cgi?id=198123 Signed-off-by: Daniel Vetter Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/radeon/radeon_display.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index 84d3d885b7a46..606972c4593aa 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -127,6 +127,8 @@ static void dce5_crtc_load_lut(struct drm_crtc *crtc) DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id); + msleep(10); + WREG32(NI_INPUT_CSC_CONTROL + radeon_crtc->crtc_offset, (NI_INPUT_CSC_GRPH_MODE(NI_INPUT_CSC_BYPASS) | NI_INPUT_CSC_OVL_MODE(NI_INPUT_CSC_BYPASS))); -- 2.20.1