From patchwork Thu May 16 14:10:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Shankar, Uma" X-Patchwork-Id: 10946625 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 EA31F912 for ; Thu, 16 May 2019 13:43:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DAB9420072 for ; Thu, 16 May 2019 13:43:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CF6E528A6E; Thu, 16 May 2019 13:43:23 +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 8874E20072 for ; Thu, 16 May 2019 13:43:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E1B4489622; Thu, 16 May 2019 13:43:21 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0F5DB89623; Thu, 16 May 2019 13:43:20 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 May 2019 06:43:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,476,1549958400"; d="scan'208";a="172354000" Received: from linuxpresi1-desktop.iind.intel.com ([10.223.74.121]) by fmsmga002.fm.intel.com with ESMTP; 16 May 2019 06:43:16 -0700 From: Uma Shankar To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [v11 03/12] drm: Parse HDR metadata info from EDID Date: Thu, 16 May 2019 19:40:08 +0530 Message-Id: <1558015817-12025-4-git-send-email-uma.shankar@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1558015817-12025-1-git-send-email-uma.shankar@intel.com> References: <1558015817-12025-1-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: dcastagna@chromium.org, jonas@kwiboo.se, emil.l.velikov@gmail.com, Uma Shankar , seanpaul@chromium.org 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 v5: Addressed Shashank's comment and added his RB. v6: Addressed Jonas Karlman review comments. v7: Adressed Ville's review comments and fixed the issue with length handling. v8: Put the length check as per the convention followed in existing code, as suggested by Ville. Signed-off-by: Uma Shankar Reviewed-by: Shashank Sharma --- drivers/gpu/drm/drm_edid.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 852bdd8..a5ef9f4 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -2852,6 +2852,7 @@ 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 @@ -3834,6 +3835,54 @@ 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; + + if (cea_db_payload_len(db) < 3) + 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(db); + + connector->hdr_sink_metadata.hdmi_type1.eotf = + eotf_supported(db); + connector->hdr_sink_metadata.hdmi_type1.metadata_type = + hdr_metadata_type(db); + + if (len >= 4) + connector->hdr_sink_metadata.hdmi_type1.max_cll = db[4]; + if (len >= 5) + connector->hdr_sink_metadata.hdmi_type1.max_fall = db[5]; + if (len >= 6) + connector->hdr_sink_metadata.hdmi_type1.min_cll = db[6]; +} + static void drm_parse_hdmi_vsdb_audio(struct drm_connector *connector, const u8 *db) { @@ -4461,6 +4510,8 @@ 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); } }