From patchwork Wed Jun 14 17:47:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sharma, Shashank" X-Patchwork-Id: 9787133 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 84D5060325 for ; Wed, 14 Jun 2017 17:45:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6EF322625B for ; Wed, 14 Jun 2017 17:45:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 62FAA274D0; Wed, 14 Jun 2017 17:45:07 +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 8E64C268AE for ; Wed, 14 Jun 2017 17:45:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F01C16E5C1; Wed, 14 Jun 2017 17:45:02 +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 00E076E5C1; Wed, 14 Jun 2017 17:45:00 +0000 (UTC) Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Jun 2017 10:44:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,341,1493708400"; d="scan'208";a="274287788" Received: from shashanks-linuxbox.iind.intel.com ([10.223.161.29]) by fmsmga004.fm.intel.com with ESMTP; 14 Jun 2017 10:44:47 -0700 From: Shashank Sharma To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, ville.syrjala@linux.intel.com Subject: [PATCH v3 04/14] drm/edid: parse YCBCR 420 videomodes from EDID Date: Wed, 14 Jun 2017 23:17:35 +0530 Message-Id: <1497462465-14066-5-git-send-email-shashank.sharma@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1497462465-14066-1-git-send-email-shashank.sharma@intel.com> References: <1497462465-14066-1-git-send-email-shashank.sharma@intel.com> Cc: ander.conselvan.de.oliveira@intel.com, Jose Abreu , Emil Velikov 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 HDMI 2.0 spec adds support for YCBCR420 sub-sampled output. CEA-861-F adds two new blocks in EDID's CEA extension blocks, to provide information about sink's YCBCR420 output capabilities. These blocks are: - YCBCR420vdb(YCBCR 420 video data block): This block contains VICs of video modes, which can be sopported only in YCBCR420 output mode (Not in RGB/YCBCR444/422. Its like a normal SVD block, valid for YCBCR420 modes only. - YCBCR420cmdb(YCBCR 420 capability map data block): This block gives information about video modes which can support YCBCR420 output mode also (along with RGB,YCBCR444/422 etc) This block contains a bitmap index of normal svd videomodes, which can support YCBCR420 output too. So if bit 0 from first vcb byte is set, first video mode in the svd list can support YCBCR420 output too. Bit 1 means second video mode from svd list can support YCBCR420 output too, and so on. This patch adds two bitmaps in display's hdmi_info structure, one each for VCB and VDB modes. If the source is HDMI 2.0 capable, this patch adds: - VDB modes (YCBCR 420 only modes) in connector's mode list, also makes an entry in the vdb_bitmap per vic. - VCB modes (YCBCR 420 also modes) only entry in the vcb_bitmap. Cc: Ville Syrjala Cc: Jose Abreu Cc: Emil Velikov V2: Addressed Review comments from Emil: - Use 1ULL< 64 modes in capability map block. - Use y420cmdb in function names and macros while dealing with vcb to be aligned with spec. - Move the display information parsing block ahead of mode parsing blocks. V3: Addressed design/review comments from Ville - Do not add flags in video modes, else we have to expose them to user - There should not be a UABI change, and kernel should detect the choice of the output based on type of mode, and the bitmaps. - Use standard bitops from kernel bitmap header, instead of calculating bit positions manually. Signed-off-by: Shashank Sharma --- drivers/gpu/drm/drm_edid.c | 193 ++++++++++++++++++++++++++++++++++++++++++-- include/drm/drm_connector.h | 23 ++++++ 2 files changed, 211 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 6fd8a98..4953f87 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -2781,7 +2781,9 @@ 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 VIDEO_CAPABILITY_BLOCK 0x07 +#define VIDEO_DATA_BLOCK_420 0x0E +#define VIDEO_CAP_BLOCK_Y420CMDB 0x0F #define EDID_BASIC_AUDIO (1 << 6) #define EDID_CEA_YCRCB444 (1 << 5) #define EDID_CEA_YCRCB422 (1 << 4) @@ -3143,15 +3145,103 @@ drm_display_mode_from_vic_index(struct drm_connector *connector, return newmode; } +/* + * do_ycbcr_420_vdb_modes - Parse YCBCR 420 only modes + * @connector: connector corresponding to the HDMI sink + * @svds: start of the data block of CEA YCBCR 420 VDB + * @len: length of the CEA YCBCR 420 VDB + * + * CEA-861-F has added a new video block called YCBCR 420 Video + * Data Block (ycbcr 420 vdb). This block contains modes which + * support YCBCR 420 HDMI output (only YCBCR 420). This function + * parses the block and adds these modes into connector's mode list. + */ +static int do_ycbcr_420_vdb_modes(struct drm_connector *connector, + const u8 *svds, u8 svds_len) +{ + int modes = 0, i; + struct drm_device *dev = connector->dev; + struct drm_display_mode *newmode; + struct drm_display_info *info = &connector->display_info; + struct drm_hdmi_info *hdmi = &info->hdmi; + + for (i = 0; i < svds_len; i++) { + u8 vic = svds[i] & 0x7f; + + newmode = drm_mode_duplicate(dev, &edid_cea_modes[vic]); + if (!newmode) + break; + /* + * ycbcr420_vdb_modes is a fix position 128 bit bitmap. + * Every bit here represents a VIC, from CEA-861-F list. + * So if bit[n] is set, it indicates vic[n+1] supports + * YCBCR420 output. Bit 0 is dummy, as VICs start at 1. + * ycbcr420_vcb_modes[0] = |VIC=64 |VIC=63 |.....|VIC=2 |VIC=1 | + * ycbcr420_vcb_modes[1] = |VIC=128|VIC=127|.....|VIC=66|VIC=65| + */ + bitmap_set(hdmi->ycbcr420_vdb_modes, vic, 1); + drm_mode_probed_add(connector, newmode); + modes++; + } + + if (modes > 0) + info->color_formats |= DRM_COLOR_FORMAT_YCRCB420; + return modes; +} + +/* + * drm_add_vcb_modes - Add a YCBCR 420 mode into bitmap + * @connector: connector corresponding to the HDMI sink + * @vic: CEA vic for the video mode to be added in the map + * + * Makes an entry for a videomode in the YCBCR 420 bitmap + */ +static void +drm_add_vcb_modes(struct drm_connector *connector, u8 vic) +{ + struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; + + /* VICs are 1 to 127(107 defined till CEA-861-F) */ + vic &= 127; + + /* + * ycbcr420_vcb_modes is a fix position 128 bit bitmap. + * Every bit here represents a VIC, from CEA-861-F list. + * So if bit[n] is set, it indicates vic[n+1] supports + * YCBCR420 output. Bit 0 is dummy, as VICs start at 1. + * ycbcr420_vcb_modes[0] = |VIC=64 |VIC=63 |.....|VIC=2 |VIC=1 | + * ycbcr420_vcb_modes[1] = |VIC=128|VIC=127|.....|VIC=66|VIC=65| + * Difference between a vcb_mode and vdb_mode is that a vcb_mode + * can support other HDMI outputs like RGB/YCBCR444/422 also + * along with YCBCR 240, whereas a vdb_mode can only support YCBCR + * 420 HDMI output. + */ + bitmap_set(hdmi->ycbcr420_vcb_modes, vic, 1); +} + static int do_cea_modes(struct drm_connector *connector, const u8 *db, u8 len) { int i, modes = 0; + struct drm_hdmi_info *hdmi = &connector->display_info.hdmi; for (i = 0; i < len; i++) { struct drm_display_mode *mode; mode = drm_display_mode_from_vic_index(connector, db, len, i); if (mode) { + /* + * YCBCR420 capability block contains a bitmap which + * gives the index of CEA modes from CEA VDB, which + * can support YCBCR 420 sampling output also (apart + * from RGB/YCBCR444 etc). + * For example, if the bit 0 in bitmap is set, + * first mode in VDB can support YCBCR420 output too. + * Add YCBCR420 modes only if sink is HDMI 2.0 capable. + */ + if (connector->is_hdmi2_src && + test_bit(i, &hdmi->ycbcr420_vcb_map)) + drm_add_vcb_modes(connector, db[i]); + drm_mode_probed_add(connector, mode); modes++; } @@ -3427,6 +3517,12 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len, } static int +cea_db_extended_tag(const u8 *db) +{ + return db[1]; +} + +static int cea_db_payload_len(const u8 *db) { return db[0] & 0x1f; @@ -3487,9 +3583,81 @@ static bool cea_db_is_hdmi_forum_vsdb(const u8 *db) return oui == HDMI_FORUM_IEEE_OUI; } +static bool cea_db_is_ycbcr_420_cmdb(const u8 *db) +{ + u8 len = cea_db_payload_len(db); + + if (cea_db_tag(db) != VIDEO_CAPABILITY_BLOCK) + return false; + + if (!len) + return false; + + if (cea_db_extended_tag(db) != VIDEO_CAP_BLOCK_Y420CMDB) + return false; + + return true; +} + +static bool cea_db_is_ycbcr_420_vdb(const u8 *db) +{ + if (cea_db_tag(db) != VIDEO_CAPABILITY_BLOCK) + return false; + + if (cea_db_extended_tag(db) != VIDEO_DATA_BLOCK_420) + return false; + + return true; +} + #define for_each_cea_db(cea, i, start, end) \ for ((i) = (start); (i) < (end) && (i) + cea_db_payload_len(&(cea)[(i)]) < (end); (i) += cea_db_payload_len(&(cea)[(i)]) + 1) +static void drm_parse_y420cmdb_bitmap(struct drm_connector *connector, + const u8 *db) +{ + struct drm_display_info *info = &connector->display_info; + struct drm_hdmi_info *hdmi = &info->hdmi; + u8 map_len = cea_db_payload_len(db) - 1; + u8 count; + u64 map = 0; + + if (!db) + return; + + if (map_len == 0) { + /* All CEA modes support ycbcr420 sampling also.*/ + hdmi->ycbcr420_vcb_map = U64_MAX; + info->color_formats |= DRM_COLOR_FORMAT_YCRCB420; + return; + } + + /* + * This map indicates which of the existing CEA block modes + * from VDB can support YCBCR420 output too. So if bit=0 is + * set, first mode from VDB can support YCBCR420 output too. + * We will parse and keep this map, before parsing VDB itself + * to avoid going through the same block again and again. + * + * Spec is not clear about max possible size of this block. + * Clamping max bitmap block size at 8 bytes. Every byte can + * address 8 CEA modes, in this way this map can address + * 8*8 = first 64 SVDs. + */ + if (WARN_ON_ONCE(map_len > 8)) + map_len = 8; + + for (count = 0; count < map_len; count++) + map |= (u64)db[2 + count] << (8 * count); + + if (map) { + DRM_DEBUG_KMS("Sink supports ycbcr 420\n"); + info->color_formats |= DRM_COLOR_FORMAT_YCRCB420; + } + + hdmi->ycbcr420_vcb_map = map; +} + static int add_cea_modes(struct drm_connector *connector, struct edid *edid) { @@ -3512,10 +3680,17 @@ add_cea_modes(struct drm_connector *connector, struct edid *edid) video = db + 1; video_len = dbl; modes += do_cea_modes(connector, video, dbl); - } - else if (cea_db_is_hdmi_vsdb(db)) { + } else if (cea_db_is_hdmi_vsdb(db)) { hdmi = db; hdmi_len = dbl; + } else if (cea_db_is_ycbcr_420_vdb(db) && + connector->is_hdmi2_src) { + const u8 *vdb420 = &db[2]; + + /* Add 4:2:0(only) modes present in EDID */ + modes += do_ycbcr_420_vdb_modes(connector, + vdb420, + dbl - 1); } } } @@ -4196,6 +4371,8 @@ 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_ycbcr_420_cmdb(db)) + drm_parse_y420cmdb_bitmap(connector, db); } } @@ -4430,6 +4607,13 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) quirks = edid_get_quirks(edid); /* + * CEA-861-F adds ycbcr capability map block, for HDMI 2.0 sinks. + * To avoid multiple parsing of same block, lets get the sink info + * before parsing CEA modes. + */ + drm_add_display_info(connector, edid); + + /* * EDID spec says modes should be preferred in this order: * - preferred detailed mode * - other detailed modes from base block @@ -4450,14 +4634,13 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) num_modes += add_cea_modes(connector, edid); num_modes += add_alternate_cea_modes(connector, edid); num_modes += add_displayid_detailed_modes(connector, edid); + if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) num_modes += add_inferred_modes(connector, edid); if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75)) edid_fixup_preferred(connector, quirks); - drm_add_display_info(connector, edid); - if (quirks & EDID_QUIRK_FORCE_6BPC) connector->display_info.bpc = 6; diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 390319c..5a47c33 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -137,6 +137,28 @@ struct drm_scdc { struct drm_hdmi_info { /** @scdc: sink's scdc support and capabilities */ struct drm_scdc scdc; + + /** + * @ycbcr420_vdb_modes: bitmap of modes which can support ycbcr420 + * output only (not normal RGB/YCBCR444/422 outputs). There are total + * 107 VICs defined by CEA-861-F spec, so the size is 128 bits to map + * upto 128 VICs; + */ + unsigned long ycbcr420_vdb_modes[BITS_TO_LONGS(128)]; + + /** + * @ycbcr420_vcb_modes: bitmap of modes which can support ycbcr420 + * output also, along with normal HDMI outputs. There are total 107 + * VICs defined by CEA-861-F spec, so the size is 128 bits to map upto + * 128 VICs; + */ + unsigned long ycbcr420_vcb_modes[BITS_TO_LONGS(128)]; + + /** @ycbcr420_vcb_map: bitmap of SVD index, to extraxt vcb modes */ + unsigned long ycbcr420_vcb_map; + + /** @ycbcr420_dc_modes: bitmap of deep color support index */ + u8 ycbcr420_dc_modes; }; /** @@ -200,6 +222,7 @@ struct drm_display_info { #define DRM_COLOR_FORMAT_RGB444 (1<<0) #define DRM_COLOR_FORMAT_YCRCB444 (1<<1) #define DRM_COLOR_FORMAT_YCRCB422 (1<<2) +#define DRM_COLOR_FORMAT_YCRCB420 (1<<3) /** * @color_formats: HDMI Color formats, selects between RGB and YCrCb