From patchwork Tue Aug 29 16:03:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Shankar, Uma" X-Patchwork-Id: 13369127 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 2418FC6FA8F for ; Tue, 29 Aug 2023 15:59:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2E04A10E3EB; Tue, 29 Aug 2023 15:59:07 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 059F410E3E2; Tue, 29 Aug 2023 15:58:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1693324739; x=1724860739; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DtTqGytOUry8UdwRzgAQXoGMp0W5qKlN8BbmMkXLJi0=; b=KHhmLrv3+IZknaIiy/Vy6HDWJXckBQFXqwtm+0H5biCmdfO6W4MJcb7I cOl7+EXV8aS9c+HDdT/HIfQh9fFxCN0HUYNwZW44Y19u38I37thZjLnE7 HE63Z3fDLqrOOaxclBa2LExrxYP1K5sNagqzcEaj4KBu/yrQlSXD3LSSm I3UYXuxWvgXBRCGxaWSvIhaoQXC1P/82uHExJ1w2mXZQoIyx2p9ah89Kh FIUH7Ir+RhXtemUEB5E6S3pQM4/WYjn/9F5GiRScfK6hVRtYw+f1SKxdc bdwpO3+pJAjv5T9W8nnvT/8mBBnE/csJB+ZXem3T5QyIfpqPLjUQ1UF1u Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10817"; a="441769240" X-IronPort-AV: E=Sophos;i="6.02,210,1688454000"; d="scan'208";a="441769240" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Aug 2023 08:58:58 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10817"; a="688554991" X-IronPort-AV: E=Sophos;i="6.02,210,1688454000"; d="scan'208";a="688554991" Received: from cfl-desktop.iind.intel.com ([10.190.239.20]) by orsmga003.jf.intel.com with ESMTP; 29 Aug 2023 08:58:56 -0700 From: Uma Shankar To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [RFC 07/33] drm: Add Enhanced Gamma LUT precision structure Date: Tue, 29 Aug 2023 21:33:56 +0530 Message-ID: <20230829160422.1251087-8-uma.shankar@intel.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230829160422.1251087-1-uma.shankar@intel.com> References: <20230829160422.1251087-1-uma.shankar@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Uma Shankar , Chaitanya Kumar Borah , wayland-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Existing LUT precision structure is having only 16 bit precision. This is not enough for upcoming enhanced hardwares and advance usecases like HDR processing. Hence added a new structure with 32 bit precision values. Co-developed-by: Chaitanya Kumar Borah Signed-off-by: Chaitanya Kumar Borah Signed-off-by: Uma Shankar --- include/uapi/drm/drm_mode.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index a21825ee93e2..1cd656b0e994 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -943,6 +943,23 @@ struct hdr_output_metadata { }; }; +/** + * struct drm_color_lut_ext - Represents high precision lut values + * + * Creating 64 bit palette entries for better data + * precision. This will be required for HDR and + * similar color processing usecases. + */ +struct drm_color_lut_ext { + /* + * Data is U32.32 fixed point format. + */ + __u64 red; + __u64 green; + __u64 blue; + __u64 reserved; +}; + /** * enum color_op_block *