From patchwork Sun Oct 27 13:45:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ankit Nautiyal X-Patchwork-Id: 13852535 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 32EC7D13561 for ; Sun, 27 Oct 2024 13:43:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C13E610E2F2; Sun, 27 Oct 2024 13:43:54 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="c6nPPCHv"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.16]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7E21810E2EF; Sun, 27 Oct 2024 13:43:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730036631; x=1761572631; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ITawyytB2t0ek5GuR0+lJE2JEwiQ0PJaUFf/Xcs/chw=; b=c6nPPCHvBVu9bnQKgfn2wAA+or9KG7o/2UFAWQxsXzQwSqc/kfcKKli7 T8H5ZfNoVLsfp+FBUDS0syZ4WwB3yuqXCvn3EBjVam7U0XUIN5iJVVwhn jKSsSf/sbZCr6VDGfBAszgsXvTUmqjeoiQfQ0+L+32KjAycqEHkSzExKJ MjRDMZudE0SYhu7lmiFO2d7PAKMsjZgT7bbkzbP72QDIEkjCanwkBp6u7 PCLjbORK3c9DemsJY0EE1lV66zANLxpZrx5CYjJg67BYoOBln4dve/+rQ EcjKmlrX0GNQThM7bbDrB+ACSx7hTNe0+vmQBk6c63yfkHq4S+DjGauAA A==; X-CSE-ConnectionGUID: jYG3S2cSRTuiP8z2Tr5XzQ== X-CSE-MsgGUID: m6gspvo2TqaQ5tND0u45lQ== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="29780957" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="29780957" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2024 06:43:51 -0700 X-CSE-ConnectionGUID: utLh2IU1QPSAzmCTrop2xQ== X-CSE-MsgGUID: fVT2dVVRTWqGityCkWi+uA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,237,1725346800"; d="scan'208";a="118841476" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2024 06:43:49 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org, suraj.kandpal@intel.com Subject: [PATCH 7/7] drm/i915/dp: Enable 3 DSC engines for 12 slices Date: Sun, 27 Oct 2024 19:15:57 +0530 Message-ID: <20241027134557.862036-8-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241027134557.862036-1-ankit.k.nautiyal@intel.com> References: <20241027134557.862036-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Certain resolutions require 12 DSC slices support along with ultrajoiner. For such cases, the third DSC Engine per Pipe is enabled. Each DSC Engine processes 1 Slice, resulting in a total of 12 VDSC slices (4 Pipes * 3 DSC Instances per Pipe). Add support for 12 DSC slices and 3 DSC engines for such modes. v2: Add missing check for 3 slices support only with 4 joined pipes. (Suraj) Signed-off-by: Ankit Nautiyal Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/display/intel_dp.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index d7d42eac4be3..a38ae79d3812 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -116,9 +116,12 @@ static const u8 valid_dsc_bpp[] = {6, 8, 10, 12, 15}; * For now consider a max of 2 slices per line, which works for all platforms. * With this we can have max of 4 DSC Slices per pipe. * + * For higher resolutions where 12 slice support is required with + * ultrajoiner, only then each pipe can support 3 slices. + * * #TODO Split this better to use 4 slices/dsc engine where supported. */ -static const u8 valid_dsc_slicecount[] = {1, 2, 4}; +static const u8 valid_dsc_slicecount[] = {1, 2, 3, 4}; /** * intel_dp_is_edp - is the given port attached to an eDP panel (either CPU or PCH) @@ -1026,6 +1029,13 @@ u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector, for (i = 0; i < ARRAY_SIZE(valid_dsc_slicecount); i++) { u8 test_slice_count = valid_dsc_slicecount[i] * num_joined_pipes; + /* + * 3 DSC Slices per pipe need 3 DSC engines, + * which is supported only with Ultrajoiner. + */ + if (valid_dsc_slicecount[i] == 3 && num_joined_pipes != 4) + continue; + if (test_slice_count > drm_dp_dsc_sink_max_slice_count(connector->dp.dsc_dpcd, false)) break; @@ -2411,8 +2421,13 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp, * VDSC engine operates at 1 Pixel per clock, so if peak pixel rate * is greater than the maximum Cdclock and if slice count is even * then we need to use 2 VDSC instances. + * In case of Ultrajoiner along with 12 slices we need to use 3 + * VDSC instances. */ - if (pipe_config->joiner_pipes || pipe_config->dsc.slice_count > 1) + if (pipe_config->joiner_pipes && num_joined_pipes == 4 && + pipe_config->dsc.slice_count == 12) + pipe_config->dsc.num_streams = 3; + else if (pipe_config->joiner_pipes || pipe_config->dsc.slice_count > 1) pipe_config->dsc.num_streams = 2; else pipe_config->dsc.num_streams = 1;