From patchwork Wed Feb 1 12:44:38 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sharma, Shashank" X-Patchwork-Id: 9549571 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 C66BD60424 for ; Wed, 1 Feb 2017 12:33:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B2E062842B for ; Wed, 1 Feb 2017 12:33:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A7D9428434; Wed, 1 Feb 2017 12:33:38 +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=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 576BC2842B for ; Wed, 1 Feb 2017 12:33:38 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4D0DB6E7B4; Wed, 1 Feb 2017 12:33:31 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 392266E7B4; Wed, 1 Feb 2017 12:33:30 +0000 (UTC) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Feb 2017 04:33:30 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,320,1477983600"; d="scan'208";a="815799183" Received: from shashanks-desktop.iind.intel.com ([10.223.26.24]) by FMSMGA003.fm.intel.com with ESMTP; 01 Feb 2017 04:33:27 -0800 From: Shashank Sharma To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, ville.syrjala@linux.intel.com Subject: [PATCH 3/6] drm/edid: detect SCDC support in HF-VSDB Date: Wed, 1 Feb 2017 18:14:38 +0530 Message-Id: <1485953081-7630-4-git-send-email-shashank.sharma@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1485953081-7630-1-git-send-email-shashank.sharma@intel.com> References: <1485953081-7630-1-git-send-email-shashank.sharma@intel.com> Cc: jose.abreu@synopsys.com, =daniel.vetter@intel.com 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 This patch does following: - Adds a new structure (drm_hdmi_info) in drm_display_info. This structure will be used to save and indicate if sink supports advance HDMI 2.0 features - Checks the HF-VSDB block for presence of SCDC, and marks it in hdmi_info structure. - If SCDC is present, checks if sink is capable of generating scdc read request, and marks it in hdmi_info structure. Signed-off-by: Shashank Sharma Reviewed-by: Thierry Reding --- drivers/gpu/drm/drm_edid.c | 14 ++++++++++++++ include/drm/drm_connector.h | 26 ++++++++++++++++++++++++++ 2 files changed, 40 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 96d3e47..37902e5 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3802,6 +3802,18 @@ enum hdmi_quantization_range } EXPORT_SYMBOL(drm_default_rgb_quant_range); +static void drm_detect_hdmi_scdc(struct drm_connector *connector, + const u8 *hf_vsdb) +{ + struct drm_hdmi_info *hdmi = &connector->display_info.hdmi_info; + + if (hf_vsdb[6] & 0x80) { + hdmi->scdc_supported = true; + if (hf_vsdb[6] & 0x40) + hdmi->scdc_rr = true; + } +} + static void drm_parse_hdmi_deep_color_info(struct drm_connector *connector, const u8 *hdmi) { @@ -3916,6 +3928,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector, if (cea_db_is_hdmi_vsdb(db)) drm_parse_hdmi_vsdb_video(connector, db); + if (cea_db_is_hdmi_forum_vsdb(db)) + drm_detect_hdmi_scdc(connector, db); } } diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index e5e1edd..2435598 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -87,6 +87,27 @@ enum subpixel_order { SubPixelVerticalRGB, SubPixelVerticalBGR, SubPixelNone, + +}; + +/** + * struct drm_hdmi_info - runtime data about the connected sink + * + * Describes if a given hdmi display supports advance HDMI 2.0 featutes. + * This information is available in CEA-861-F extension blocks (like + * HF-VSDB) + * For sinks which provide an EDID this can be filled out by calling + * drm_add_edid_modes(). + */ +struct drm_hdmi_info { + /** + * @scdc_supported: status control & data channel present. + */ + bool scdc_supported; + /** + * @scdc_rr: sink is capable of generating scdc read request. + */ + bool scdc_rr; }; /** @@ -188,6 +209,11 @@ struct drm_display_info { * @cea_rev: CEA revision of the HDMI sink. */ u8 cea_rev; + + /** + * @hdmi_info: advance features of a HDMI sink. + */ + struct drm_hdmi_info hdmi_info; }; int drm_display_info_set_bus_formats(struct drm_display_info *info,