From patchwork Sun Nov 1 10:06:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nautiyal, Ankit K" X-Patchwork-Id: 11871891 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E041BC2D0A3 for ; Sun, 1 Nov 2020 10:13:59 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A7F6920719 for ; Sun, 1 Nov 2020 10:13:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A7F6920719 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 619A36EA87; Sun, 1 Nov 2020 10:13:52 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1E6ED6EA87; Sun, 1 Nov 2020 10:13:51 +0000 (UTC) IronPort-SDR: V5R1uJKbNiu9h+gXYYAnQLMR/zYCyBnxJeAkPVW1REIwPCsxM6asvYFMD29xItps++0/vAaCZ1 djOVWAY31gqQ== X-IronPort-AV: E=McAfee;i="6000,8403,9791"; a="166190491" X-IronPort-AV: E=Sophos;i="5.77,441,1596524400"; d="scan'208";a="166190491" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Nov 2020 02:13:50 -0800 IronPort-SDR: 3uKBX6QfrU45mOCFRKjV19LHl8amJGGioT4v0+68jAd5aRwCNLS0o98mk8yOA36pjOjp9y93h+ cmNbsED5tPqw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,441,1596524400"; d="scan'208";a="425738562" Received: from linux-akn.iind.intel.com ([10.223.34.148]) by fmsmga001.fm.intel.com with ESMTP; 01 Nov 2020 02:13:49 -0800 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Subject: [PATCH v2 03/13] drm/edid: Parse DSC1.2 cap fields from HFVSDB block Date: Sun, 1 Nov 2020 15:36:47 +0530 Message-Id: <20201101100657.12087-4-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201101100657.12087-1-ankit.k.nautiyal@intel.com> References: <20201101100657.12087-1-ankit.k.nautiyal@intel.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vandita.kulkarni@intel.com, uma.shankar@intel.com, dri-devel@lists.freedesktop.org, swati2.sharma@intel.com MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This patch parses HFVSDB fields for DSC1.2 capabilities of an HDMI2.1 sink. These fields are required by a source to understand the DSC capability of the sink, to set appropriate PPS parameters, before transmitting compressed data stream. v2: Addressed following issues as suggested by Uma Shankar: -Added a new struct for hdmi dsc cap -Fixed bugs in macros usage. Signed-off-by: Ankit Nautiyal Reviewed-by: Uma Shankar --- drivers/gpu/drm/drm_edid.c | 59 +++++++++++++++++++++++++++++++++++++ include/drm/drm_connector.h | 43 +++++++++++++++++++++++++++ 2 files changed, 102 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 26797868ea5b..feaf2d7659a4 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4939,11 +4939,70 @@ static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector, if (hf_vsdb[7]) { u8 max_frl_rate; + u8 dsc_max_frl_rate; + u8 dsc_max_slices; + struct drm_hdmi_dsc_cap *hdmi_dsc = &hdmi->dsc_cap; DRM_DEBUG_KMS("hdmi_21 sink detected. parsing edid\n"); max_frl_rate = (hf_vsdb[7] & DRM_EDID_MAX_FRL_RATE_MASK) >> 4; drm_get_max_frl_rate(max_frl_rate, &hdmi->max_lanes, &hdmi->max_frl_rate_per_lane); + hdmi_dsc->v_1p2 = hf_vsdb[11] & DRM_EDID_DSC_1P2; + + if (hdmi_dsc->v_1p2) { + hdmi_dsc->native_420 = hf_vsdb[11] & DRM_EDID_DSC_NATIVE_420; + hdmi_dsc->all_bpp = hf_vsdb[11] & DRM_EDID_DSC_ALL_BPP; + + if (hf_vsdb[11] & DRM_EDID_DSC_16BPC) + hdmi_dsc->bpc_supported = 16; + else if (hf_vsdb[11] & DRM_EDID_DSC_12BPC) + hdmi_dsc->bpc_supported = 12; + else if (hf_vsdb[11] & DRM_EDID_DSC_10BPC) + hdmi_dsc->bpc_supported = 10; + else + hdmi_dsc->bpc_supported = 0; + + dsc_max_frl_rate = (hf_vsdb[12] & DRM_EDID_DSC_MAX_FRL_RATE_MASK) >> 4; + drm_get_max_frl_rate(dsc_max_frl_rate, &hdmi_dsc->max_lanes, + &hdmi_dsc->max_frl_rate_per_lane); + hdmi_dsc->total_chunk_kbytes = hf_vsdb[13] & DRM_EDID_DSC_TOTAL_CHUNK_KBYTES; + + dsc_max_slices = hf_vsdb[12] & DRM_EDID_DSC_MAX_SLICES; + switch (dsc_max_slices) { + case 1: + hdmi_dsc->max_slices = 1; + hdmi_dsc->clk_per_slice = 340; + break; + case 2: + hdmi_dsc->max_slices = 2; + hdmi_dsc->clk_per_slice = 340; + break; + case 3: + hdmi_dsc->max_slices = 4; + hdmi_dsc->clk_per_slice = 340; + break; + case 4: + hdmi_dsc->max_slices = 8; + hdmi_dsc->clk_per_slice = 340; + break; + case 5: + hdmi_dsc->max_slices = 8; + hdmi_dsc->clk_per_slice = 400; + break; + case 6: + hdmi_dsc->max_slices = 12; + hdmi_dsc->clk_per_slice = 400; + break; + case 7: + hdmi_dsc->max_slices = 16; + hdmi_dsc->clk_per_slice = 400; + break; + case 0: + default: + hdmi_dsc->max_slices = 0; + hdmi_dsc->clk_per_slice = 0; + } + } } drm_parse_ycbcr420_deep_color_info(connector, hf_vsdb); diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index f351bf10c076..06d24e36268e 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -175,6 +175,46 @@ struct drm_scdc { struct drm_scrambling scrambling; }; +/** + * struct drm_hdmi_dsc_cap - DSC capabilities of HDMI sink + * + * Describes the DSC support provided by HDMI 2.1 sink. + * The information is fetched fom additional HFVSDB blocks defined + * for HDMI 2.1. + */ +struct drm_hdmi_dsc_cap { + /** @v_1p2: flag for dsc1.2 version support by sink */ + bool v_1p2; + + /** @native_420: Does sink support DSC with 4:2:0 compression */ + bool native_420; + + /** + * @all_bpp: Does sink support all bpp with 4:4:4: or 4:2:2 + * compressed formats + */ + bool all_bpp; + + /** + * @bpc_supported: compressed bpc supported by sink : 10, 12 or 16 bpc + */ + u8 bpc_supported; + + /** @max_slices: maximum number of Horizontal slices supported by */ + u8 max_slices; + + /** @clk_per_slice : max pixel clock in MHz supported per slice */ + int clk_per_slice; + + /** @max_lanes : dsc max lanes supported for Fixed rate Link training */ + u8 max_lanes; + + /** @max_frl_rate_per_lane : maximum frl rate with DSC per lane */ + u8 max_frl_rate_per_lane; + + /** @total_chunk_kbytes: max size of chunks in KBs supported per line*/ + u8 total_chunk_kbytes; +}; /** * struct drm_hdmi_info - runtime information about the connected HDMI sink @@ -213,6 +253,9 @@ struct drm_hdmi_info { /** @max_lanes: supported by sink */ u8 max_lanes; + + /** @dsc_cap: DSC capabilities of the sink */ + struct drm_hdmi_dsc_cap dsc_cap; }; /**