From patchwork Wed May 31 10:10:51 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Shankar, Uma" X-Patchwork-Id: 9756421 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6DFC5602BF for ; Wed, 31 May 2017 09:37:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 66BAF269E2 for ; Wed, 31 May 2017 09:37:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5B6C128474; Wed, 31 May 2017 09:37:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id ED914269E2 for ; Wed, 31 May 2017 09:37:31 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EE14F6E1BE; Wed, 31 May 2017 09:37:29 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 151286E1BC; Wed, 31 May 2017 09:37:25 +0000 (UTC) Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga104.jf.intel.com with ESMTP; 31 May 2017 02:37:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.38,422,1491289200"; d="scan'208";a="268419043" Received: from ubuntu-tc11.iind.intel.com ([10.223.26.127]) by fmsmga004.fm.intel.com with ESMTP; 31 May 2017 02:37:22 -0700 From: Uma Shankar To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [RFC 3/9] drm: Parse HDR metadata info from EDID Date: Wed, 31 May 2017 15:40:51 +0530 Message-Id: <1496225457-30514-4-git-send-email-uma.shankar@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1496225457-30514-1-git-send-email-uma.shankar@intel.com> References: <1496225457-30514-1-git-send-email-uma.shankar@intel.com> Cc: Uma Shankar X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP HDR metadata block is introduced in CEA-861.3 spec. Parsing the same to get the panel's HDR metadata. Signed-off-by: Uma Shankar --- drivers/gpu/drm/drm_edid.c | 58 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 4dee139..14f2740 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3375,6 +3375,62 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode) mode->clock = clock; } +static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db) +{ + if (cea_db_tag(db) != DATA_BLOCK_EXTENDED_TAG) + return false; + + if (db[1] != HDR_STATIC_METADATA_BLOCK) + return false; + + return true; +} + +static uint16_t eotf_supported(const u8 *edid_ext) +{ + uint16_t val = 0; + + if (edid_ext[2] & TRADITIONAL_GAMMA_SDR) + val |= TRADITIONAL_GAMMA_SDR; + if (edid_ext[2] & TRADITIONAL_GAMMA_HDR) + val |= TRADITIONAL_GAMMA_HDR; + if (edid_ext[2] & SMPTE_ST2084) + val |= SMPTE_ST2084; + + return val; +} + +static uint16_t hdr_metadata_type(const u8 *edid_ext) +{ + uint16_t val = 0; + + if (edid_ext[3] & STATIC_METADATA_TYPE1) + val |= STATIC_METADATA_TYPE1; + + return val; +} + +static void +drm_parse_hdr_metadata_block(struct drm_connector *connector, const u8 *db) +{ + uint16_t len; + + len = cea_db_payload_len(db); + connector->hdr_panel_metadata->eotf = eotf_supported(db); + connector->hdr_panel_metadata->type = hdr_metadata_type(db); + + if (len == 6) { + connector->hdr_panel_metadata->max_cll = db[4]; + connector->hdr_panel_metadata->max_fall = db[5]; + connector->hdr_panel_metadata->min_cll = db[6]; + } else if (len == 5) { + connector->hdr_panel_metadata->max_cll = db[4]; + connector->hdr_panel_metadata->max_fall = db[5]; + } else if (len == 4) + connector->hdr_panel_metadata->max_cll = db[4]; + +} + static void drm_parse_hdmi_vsdb_audio(struct drm_connector *connector, const u8 *db) { @@ -3997,6 +4053,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector, drm_parse_hdmi_vsdb_video(connector, db); if (cea_db_is_hdmi_forum_vsdb(db)) drm_parse_hdmi_forum_vsdb(connector, db); + if (cea_db_is_hdmi_hdr_metadata_block(db)) + drm_parse_hdr_metadata_block(connector, db); } }