From patchwork Sun Oct 27 13:45:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nautiyal, Ankit K" X-Patchwork-Id: 13852529 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 78DA7D13560 for ; Sun, 27 Oct 2024 13:43:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0310410E2E3; Sun, 27 Oct 2024 13:43:43 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="FIvi61QA"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.16]) by gabe.freedesktop.org (Postfix) with ESMTPS id A126810E1E4; Sun, 27 Oct 2024 13:43:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730036621; x=1761572621; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3RYlCAS4sdmyIw+dYiCwEq0RnvTWX45EaVUmq0tk5Is=; b=FIvi61QAB9HRxLFPFTIGC8vH1w68tt7x2jTDNcO50zyqYP4WWh1ZmuVA RPR1dvFDmY98ue/BOAEsRkdlihVfgV3tYC40PCBc48rFBbGLTFMTrVF01 SBH1B/QVfIkGyHWLhR3FxEZVEFwmLKWESO1KgAqRU2z8C770Fk1g1Nyad EYneJczL7zZY3xpN+n8DcczxaP1bILHqazwMpbSc+qVOCLAhzBvl+0e2O SNtPjDppQ9J1Pdnr8gb97k1ZfvStm2lz4sIV8TneY+cwc14DV2Kwt0xtV zhjuf9oViF0BfYGEMYuxrhZRSXZd6K/B+knRwt3Hjpv8S+ThfcOhXj34/ Q==; X-CSE-ConnectionGUID: gQJAsA3XRKi959Ma4TVrig== X-CSE-MsgGUID: s53z0X7cQd6BLUlrKsccBQ== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="29780947" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="29780947" 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 06:43:41 -0700 X-CSE-ConnectionGUID: MQDBtqtqQ+SVW5XVilHw/g== X-CSE-MsgGUID: 0w+kYoxoRa2eGgQbBR71GA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,237,1725346800"; d="scan'208";a="118841438" 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 06:43:39 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org, suraj.kandpal@intel.com Subject: [PATCH 1/7] drm/i915/dp: Update Comment for Valid DSC Slices per Line Date: Sun, 27 Oct 2024 19:15:51 +0530 Message-ID: <20241027134557.862036-2-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" For some platforms, the maximum slices per DSC engine is 4, while for others it is 2. Update the comment to reflect this and clarify that the 'valid_dsc_slicecount' list represents the valid number of slices per pipe. Currently, we are working with 1, and 2 slices per DSC engine, which works for all platforms. With this the number of slices per pipe can be 1,2 or 4 with different slice & DSC engine configuration. Add a #TODO for adding support for 4 slices per DSC engine where supported. Signed-off-by: Ankit Nautiyal Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/display/intel_dp.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 7e29619ba040..bd9f37e1a13f 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -109,8 +109,14 @@ /* Constants for DP DSC configurations */ static const u8 valid_dsc_bpp[] = {6, 8, 10, 12, 15}; -/* With Single pipe configuration, HW is capable of supporting maximum - * of 4 slices per line. +/* + * With Single pipe configuration, HW is capable of supporting maximum of: + * 2 slices per line for ICL, BMG + * 4 slices per line for other platforms. + * 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. + * + * #TODO Split this better to use 4 slices/dsc engine where supported. */ static const u8 valid_dsc_slicecount[] = {1, 2, 4};