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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 097D7C19F4F for ; Tue, 7 May 2024 23:09:47 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6CF64112FE1; Tue, 7 May 2024 23:09:46 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="FvygdZcl"; dkim-atps=neutral Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by gabe.freedesktop.org (Postfix) with ESMTPS id 81AA3112FE0; Tue, 7 May 2024 23:09:45 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id DEAF7619FF; Tue, 7 May 2024 23:09:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4DE38C4AF68; Tue, 7 May 2024 23:09:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715123384; bh=Z1MO1ZagCXquTyQi4RXjNlyeIi8Vavtv2regL3YQls4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FvygdZclTQBMnefzCqISuxqBnwZCrjcvAcWsDyk0zKpFLpTuCsW4CylY/i68rZs8m sNePKhY+F/ae2ZfHkm6FBglfY+h4cM/tZp6O3u/oipJHGZZkw2vpqjgBxOLXcR0eGg E7xavrZBUCWLCHxRmIRlufUX2ph/GjT7jhNQ9oq2VrhYryHDb0St2P7ysX9rTZGW4S f1hadcNqGiLCyRHMcpXe0g80jYPsqM3hty2PFv545Dp2gktqU+cde+CiIwvxr0m0ev MUYYxlRViNGbqZy9BKQKMdy1fxUpJXEt8+FiL7+ZkfIxuswONdGsHAOfrbCvTRe9Gs d2m5LGMc3nMcw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sung Joon Kim , Anthony Koo , Wayne Lin , Daniel Wheeler , Alex Deucher , Sasha Levin , harry.wentland@amd.com, sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, alvin.lee2@amd.com, jun.lei@amd.com, wenjing.liu@amd.com, aric.cyr@amd.com, dillon.varone@amd.com, chiawen.huang@amd.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.8 42/52] drm/amd/display: Disable seamless boot on 128b/132b encoding Date: Tue, 7 May 2024 19:07:08 -0400 Message-ID: <20240507230800.392128-42-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240507230800.392128-1-sashal@kernel.org> References: <20240507230800.392128-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.8.9 Content-Transfer-Encoding: 8bit X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: Sung Joon Kim [ Upstream commit 6f0c228ed9184287031a66b46a79e5a3d2e73a86 ] [why] preOS will not support display mode programming and link training for UHBR rates. [how] If we detect a sink that's UHBR capable, disable seamless boot Reviewed-by: Anthony Koo Acked-by: Wayne Lin Signed-off-by: Sung Joon Kim Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index 3c3d613c5f00e..040b5c2a57586 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -1804,6 +1804,9 @@ bool dc_validate_boot_timing(const struct dc *dc, return false; } + if (link->dpcd_caps.channel_coding_cap.bits.DP_128b_132b_SUPPORTED) + return false; + if (dc->link_srv->edp_is_ilr_optimization_required(link, crtc_timing)) { DC_LOG_EVENT_LINK_TRAINING("Seamless boot disabled to optimize eDP link rate\n"); return false; -- 2.43.0