From patchwork Wed Mar 20 10:48:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Shankar, Uma" X-Patchwork-Id: 10861323 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1333A1390 for ; Wed, 20 Mar 2019 10:23:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ED94229AB8 for ; Wed, 20 Mar 2019 10:23:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E1B5929ABD; Wed, 20 Mar 2019 10:23:33 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=unavailable 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 A1B7629B10 for ; Wed, 20 Mar 2019 10:23:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7E7B389CCE; Wed, 20 Mar 2019 10:23:27 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3BAE489CD3; Wed, 20 Mar 2019 10:23:24 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Mar 2019 03:23:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,248,1549958400"; d="scan'208";a="142257502" Received: from linuxpresi1-desktop.iind.intel.com ([10.223.74.134]) by FMSMGA003.fm.intel.com with ESMTP; 20 Mar 2019 03:23:21 -0700 From: Uma Shankar To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [v6 02/13] drm: Parse HDR metadata info from EDID Date: Wed, 20 Mar 2019 16:18:15 +0530 Message-Id: <1553078906-5991-3-git-send-email-uma.shankar@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1553078906-5991-1-git-send-email-uma.shankar@intel.com> References: <1553078906-5991-1-git-send-email-uma.shankar@intel.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ville.syrjala@intel.com, Liviu.Dudau@arm.com, emil.l.velikov@gmail.com, Uma Shankar , maarten.lankhorst@intel.com 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. v2: Rebase and added Ville's POC changes to the patch. v3: No Change v4: Addressed Shashank's review comments Signed-off-by: Uma Shankar Reviewed-by: Shashank Sharma --- drivers/gpu/drm/drm_edid.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index fa39592..fd8a621a 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -2840,6 +2840,7 @@ static int drm_cvt_modes(struct drm_connector *connector, #define VIDEO_BLOCK 0x02 #define VENDOR_BLOCK 0x03 #define SPEAKER_BLOCK 0x04 +#define HDR_STATIC_METADATA_BLOCK 0x6 #define USE_EXTENDED_TAG 0x07 #define EXT_VIDEO_CAPABILITY_BLOCK 0x00 #define EXT_VIDEO_DATA_BLOCK_420 0x0E @@ -3587,6 +3588,12 @@ static int add_3d_struct_modes(struct drm_connector *connector, u16 structure, } static int +cea_db_payload_len_ext(const u8 *db) +{ + return (db[0] & 0x1f) - 1; +} + +static int cea_db_extended_tag(const u8 *db) { return db[1]; @@ -3822,6 +3829,46 @@ 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) != USE_EXTENDED_TAG) + return false; + + if (db[1] != HDR_STATIC_METADATA_BLOCK) + return false; + + return true; +} + +static uint8_t eotf_supported(const u8 *edid_ext) +{ + return edid_ext[2] & + (BIT(HDMI_EOTF_TRADITIONAL_GAMMA_SDR) | + BIT(HDMI_EOTF_TRADITIONAL_GAMMA_HDR) | + BIT(HDMI_EOTF_SMPTE_ST2084)); +} + +static uint8_t hdr_metadata_type(const u8 *edid_ext) +{ + return edid_ext[3] & + BIT(HDMI_STATIC_METADATA_TYPE1); +} + +static void +drm_parse_hdr_metadata_block(struct drm_connector *connector, const u8 *db) +{ + u16 len; + + len = cea_db_payload_len_ext(db); + connector->hdr_metadata.eotf = eotf_supported(db); + connector->hdr_metadata.metadata_type = hdr_metadata_type(db); + + if (len >= 5) + connector->hdr_metadata.max_fall = db[5]; + if (len >= 4) + connector->hdr_metadata.max_cll = db[4]; +} + static void drm_parse_hdmi_vsdb_audio(struct drm_connector *connector, const u8 *db) { @@ -4449,6 +4496,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector, drm_parse_y420cmdb_bitmap(connector, db); if (cea_db_is_vcdb(db)) drm_parse_vcdb(connector, db); + if (cea_db_is_hdmi_hdr_metadata_block(db)) + drm_parse_hdr_metadata_block(connector, db); } }