From patchwork Mon Jan 14 14:15:09 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= X-Patchwork-Id: 1972221 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by patchwork1.kernel.org (Postfix) with ESMTP id 50B533FC85 for ; Mon, 14 Jan 2013 14:22:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 40E1DE5F4E for ; Mon, 14 Jan 2013 06:22:34 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 630D9E5F3E; Mon, 14 Jan 2013 06:15:31 -0800 (PST) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 14 Jan 2013 06:15:31 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,468,1355126400"; d="scan'208";a="246376082" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.168]) by orsmga001.jf.intel.com with SMTP; 14 Jan 2013 06:15:28 -0800 Received: by stinkbox (sSMTP sendmail emulation); Mon, 14 Jan 2013 16:15:27 +0200 From: ville.syrjala@linux.intel.com To: intel-gfx@lists.freedesktop.org Date: Mon, 14 Jan 2013 16:15:09 +0200 Message-Id: <1358172910-7820-5-git-send-email-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 1.7.8.6 In-Reply-To: <1358172910-7820-1-git-send-email-ville.syrjala@linux.intel.com> References: <1358172910-7820-1-git-send-email-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Cc: dri-devel@lists.freedesktop.org Subject: [Intel-gfx] [PATCH 4/5] drm/edid: Add drm_rgb_quant_range_selectable() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+patchwork-intel-gfx=patchwork.kernel.org@lists.freedesktop.org From: Ville Syrjälä drm_rgb_quant_range_selectable() will report whether the monitor claims to support for RGB quantization range selection. The information can be found in the CEA Video capability block. Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/drm_edid.c | 33 +++++++++++++++++++++++++++++++++ include/drm/drm_crtc.h | 1 + 2 files changed, 34 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 5a3770f..deba722 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1483,9 +1483,11 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid, #define VIDEO_BLOCK 0x02 #define VENDOR_BLOCK 0x03 #define SPEAKER_BLOCK 0x04 +#define VIDEO_CAPABILITY_BLOCK 0x07 #define EDID_BASIC_AUDIO (1 << 6) #define EDID_CEA_YCRCB444 (1 << 5) #define EDID_CEA_YCRCB422 (1 << 4) +#define EDID_CEA_VCDB_QS (1 << 6) /** * Search EDID for CEA extension block. @@ -1902,6 +1904,37 @@ end: EXPORT_SYMBOL(drm_detect_monitor_audio); /** + * drm_rgb_quant_range_selectable - is RGB quantization range selectable? + * + * Check whether the monitor reports the RGB quantization range selection + * as supported. The AVI infoframe can then be used to inform the monitor + * which quantzation range (full or limited) is used. + */ +bool drm_rgb_quant_range_selectable(struct edid *edid) +{ + u8 *edid_ext; + int i, start, end; + + edid_ext = drm_find_cea_extension(edid); + if (!edid_ext) + return false; + + if (cea_db_offsets(edid_ext, &start, &end)) + return false; + + for_each_cea_db(edid_ext, i, start, end) { + if (cea_db_tag(&edid_ext[i]) == VIDEO_CAPABILITY_BLOCK && + cea_db_payload_len(&edid_ext[i]) == 2) { + DRM_DEBUG_KMS("CEA VCDB 0x%02x\n", edid_ext[i + 2]); + return edid_ext[i + 2] & EDID_CEA_VCDB_QS; + } + } + + return false; +} +EXPORT_SYMBOL(drm_rgb_quant_range_selectable); + +/** * drm_add_display_info - pull display info out if present * @edid: EDID data * @info: display info (attached to connector) diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 00d78b5..30892dc 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1033,6 +1033,7 @@ extern u8 *drm_find_cea_extension(struct edid *edid); extern u8 drm_match_cea_mode(struct drm_display_mode *to_match); extern bool drm_detect_hdmi_monitor(struct edid *edid); extern bool drm_detect_monitor_audio(struct edid *edid); +extern bool drm_rgb_quant_range_selectable(struct edid *edid); extern int drm_mode_page_flip_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); extern struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,