From patchwork Fri Feb 18 14:54:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guillaume Ranquet X-Patchwork-Id: 12751532 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0A77CC433EF for ; Fri, 18 Feb 2022 15:05:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=KCpUL9TKN8bI3DKi/oE63aohPZ+A2BJLr6ic/yHMZIo=; b=kk4ch3REgQ4kcA HaAPhOsTpQ/Ir2bJCSiufSyMLCYLuH397xfW7esvDOPHwzdHDn8sW8b3Lgmfe1hCNQWGrlygU+X8f UTrF1aE5886Znyd9QzdE7vzQ1Bg9Xp8q9TqWkdPcZtTTD21nhi5f1urRzQe3KhnlAZhoaaL6i1Lr5 o7JNQvetfIBmfuGWzf6vJ6AgXN7EGaU79bC+t/RC6lLV5/U306fF4coQ0v6LhHy+ldXCaBKMmZD6r FzzkhI4LE57QJL8H+o13q+192yLvBTKuz3orsbB42ZKrtDfo6oJVwUih0l2jCVtT0llz+e9PLNnYO I4CGzF4Cf58R1GpGXyWA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nL4n5-00EwMg-Cx; Fri, 18 Feb 2022 15:03:23 +0000 Received: from mail-wr1-x42d.google.com ([2a00:1450:4864:20::42d]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nL4g3-00Es2B-US for linux-arm-kernel@lists.infradead.org; Fri, 18 Feb 2022 14:56:12 +0000 Received: by mail-wr1-x42d.google.com with SMTP id h6so15005150wrb.9 for ; Fri, 18 Feb 2022 06:56:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=cimbY7LPDbRuh3lILBl/36Td2W7ROjWFj0D1595RCaw=; b=TNGjjxKv6EvX9YTQfRDhTS2iTF1YJF70cMlDGdFJvKiVMAcafgzWoGpdVNJ3f1VaN6 K2VmR7PE/RJ9gtMjWj0UeFiU4QpV0ro7fQXRXHrO7Ey5v1TM3PuzmRI5HSgWSYJ1c1sF PBOq+rk8WTLpxfSdRm1ZciN3IeAKXL00c+zu8C4GTacn917TuorzBb953HHpAvFUmP7i +yLIkMgLDilwd3itpBtFL5ItEvLySPXk00YHamGIM5JAOXfi4ZfqqCUva2SIgs1j+lks sxrb5oX0G9ATnrJRBpTzk3zCrQVSf5JhtCSXaLUJ7t6abMEtF9CgH2l+EfvwH79/I3MP hcJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=cimbY7LPDbRuh3lILBl/36Td2W7ROjWFj0D1595RCaw=; b=dtkF5bbiVzoOePlvWZRQ/YzyI57rh6kQ6tXpymi/PY2Zuz2oByfp9JHSZv+PzPANYy /2v5YzyZGTyPO/OgOXkAbvZF+ahPO3c03O5xJfVH+3+HardV0MH5Uz+h3YtJeKifAhYi fTc6CRlhGYghv3qjxm8QvHj7nPxtKffaVrG3EI7yc/MswKiJ3JFfLGvzhX8tADOwoCYT i3Cp4jr1gdfkKU6fEq1NHH7I8yZv44lHT4Z/hpwVYFRPMKjS8QxtCw9MEGl0w+Nxg4TW RN88Df53vkFl7zoursciytYJEQLj6YPev/QI9DlFM9SJX5RD2PzNDQCSQM7mAiREiWGm X1JQ== X-Gm-Message-State: AOAM530TZpn6VDctDqDSO26qlpJJJKfnvk/dCLkO+L4Sr1Qq5vHFknrS 7oqPTo50MGX6KyIkXI8v07ol1w== X-Google-Smtp-Source: ABdhPJy1JUJKheTePbsE3NKWxwoKzBKakTmpScLec8cb68771P+YmJAhdQP0PlPzF4bonlbfNdg8+Q== X-Received: by 2002:adf:d20c:0:b0:1e5:952c:34b5 with SMTP id j12-20020adfd20c000000b001e5952c34b5mr6528414wrh.82.1645196165879; Fri, 18 Feb 2022 06:56:05 -0800 (PST) Received: from localhost.localdomain (2a02-8440-6241-3b28-3074-96af-9642-0002.rev.sfr.net. [2a02:8440:6241:3b28:3074:96af:9642:2]) by smtp.gmail.com with ESMTPSA id b10sm47431454wrd.8.2022.02.18.06.56.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Feb 2022 06:56:05 -0800 (PST) From: Guillaume Ranquet To: chunkuang.hu@kernel.org, p.zabel@pengutronix.de, airlied@linux.ie, daniel@ffwll.ch, robh+dt@kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, matthias.bgg@gmail.com, chunfeng.yun@mediatek.com, kishon@ti.com, vkoul@kernel.org, deller@gmx.de, ck.hu@mediatek.com, jitao.shi@mediatek.com, angelogioacchino.delregno@collabora.com Cc: dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-phy@lists.infradead.org, linux-fbdev@vger.kernel.org, Markus Schneider-Pargmann Subject: [PATCH v8 04/19] video/hdmi: Add audio_infoframe packing for DP Date: Fri, 18 Feb 2022 15:54:22 +0100 Message-Id: <20220218145437.18563-5-granquet@baylibre.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220218145437.18563-1-granquet@baylibre.com> References: <20220218145437.18563-1-granquet@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220218_065608_069292_320E7485 X-CRM114-Status: GOOD ( 19.22 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Markus Schneider-Pargmann Similar to HDMI, DP uses audio infoframes as well which are structured very similar to the HDMI ones. This patch adds a helper function to pack the HDMI audio infoframe for DP, called hdmi_audio_infoframe_pack_for_dp(). hdmi_audio_infoframe_pack_only() is split into two parts. One of them packs the payload only and can be used for HDMI and DP. Signed-off-by: Markus Schneider-Pargmann Signed-off-by: Guillaume Ranquet --- drivers/video/hdmi.c | 83 ++++++++++++++++++++++++++++--------- include/drm/drm_dp_helper.h | 2 + include/linux/hdmi.h | 7 +++- 3 files changed, 72 insertions(+), 20 deletions(-) diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c index 947be761dfa40..63e74d9fd210e 100644 --- a/drivers/video/hdmi.c +++ b/drivers/video/hdmi.c @@ -21,6 +21,7 @@ * DEALINGS IN THE SOFTWARE. */ +#include #include #include #include @@ -381,12 +382,34 @@ static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *fr * * Returns 0 on success or a negative error code on failure. */ -int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame) +int hdmi_audio_infoframe_check(const struct hdmi_audio_infoframe *frame) { return hdmi_audio_infoframe_check_only(frame); } EXPORT_SYMBOL(hdmi_audio_infoframe_check); +static void +hdmi_audio_infoframe_pack_payload(const struct hdmi_audio_infoframe *frame, + u8 *buffer) +{ + u8 channels; + + if (frame->channels >= 2) + channels = frame->channels - 1; + else + channels = 0; + + buffer[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7); + buffer[1] = ((frame->sample_frequency & 0x7) << 2) | + (frame->sample_size & 0x3); + buffer[2] = frame->coding_type_ext & 0x1f; + buffer[3] = frame->channel_allocation; + buffer[4] = (frame->level_shift_value & 0xf) << 3; + + if (frame->downmix_inhibit) + buffer[4] |= BIT(7); +} + /** * hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer * @frame: HDMI audio infoframe @@ -404,7 +427,6 @@ EXPORT_SYMBOL(hdmi_audio_infoframe_check); ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame, void *buffer, size_t size) { - unsigned char channels; u8 *ptr = buffer; size_t length; int ret; @@ -420,28 +442,13 @@ ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame, memset(buffer, 0, size); - if (frame->channels >= 2) - channels = frame->channels - 1; - else - channels = 0; - ptr[0] = frame->type; ptr[1] = frame->version; ptr[2] = frame->length; ptr[3] = 0; /* checksum */ - /* start infoframe payload */ - ptr += HDMI_INFOFRAME_HEADER_SIZE; - - ptr[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7); - ptr[1] = ((frame->sample_frequency & 0x7) << 2) | - (frame->sample_size & 0x3); - ptr[2] = frame->coding_type_ext & 0x1f; - ptr[3] = frame->channel_allocation; - ptr[4] = (frame->level_shift_value & 0xf) << 3; - - if (frame->downmix_inhibit) - ptr[4] |= BIT(7); + hdmi_audio_infoframe_pack_payload(frame, + ptr + HDMI_INFOFRAME_HEADER_SIZE); hdmi_infoframe_set_checksum(buffer, length); @@ -479,6 +486,44 @@ ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame, } EXPORT_SYMBOL(hdmi_audio_infoframe_pack); +/** + * hdmi_audio_infoframe_pack_for_dp - Pack a HDMI Audio infoframe for + * displayport + * + * @frame HDMI Audio infoframe + * @sdp secondary data packet for display port. This is filled with the + * appropriate data + * @dp_version Display Port version to be encoded in the header + * + * Packs a HDMI Audio Infoframe to be sent over Display Port. This function + * fills the secondary data packet to be used for Display Port. + * + * Return: Number of total written bytes or a negative errno on failure. + */ +ssize_t +hdmi_audio_infoframe_pack_for_dp(const struct hdmi_audio_infoframe *frame, + struct dp_sdp *sdp, u8 dp_version) +{ + int ret; + + ret = hdmi_audio_infoframe_check(frame); + if (ret) + return ret; + + memset(sdp->db, 0, sizeof(sdp->db)); + + // Secondary-data packet header + sdp->sdp_header.HB0 = 0; + sdp->sdp_header.HB1 = frame->type; + sdp->sdp_header.HB2 = DP_SDP_AUDIO_INFOFRAME_HB2; + sdp->sdp_header.HB3 = (dp_version & 0x3f) << 2; + + hdmi_audio_infoframe_pack_payload(frame, sdp->db); + + return frame->length + 4; +} +EXPORT_SYMBOL(hdmi_audio_infoframe_pack_for_dp); + /** * hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe * @frame: HDMI vendor infoframe diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 30359e434c3f3..707927e3e773a 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1567,6 +1567,8 @@ int drm_dp_bw_code_to_link_rate(u8 link_bw); #define DP_SDP_VSC_EXT_CEA 0x21 /* DP 1.4 */ /* 0x80+ CEA-861 infoframe types */ +#define DP_SDP_AUDIO_INFOFRAME_HB2 0x1b + /** * struct dp_sdp_header - DP secondary data packet header * @HB0: Secondary Data Packet ID diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h index c8ec982ff4984..2f4dcc8d060e3 100644 --- a/include/linux/hdmi.h +++ b/include/linux/hdmi.h @@ -336,7 +336,12 @@ ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame, void *buffer, size_t size); ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame, void *buffer, size_t size); -int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame); +int hdmi_audio_infoframe_check(const struct hdmi_audio_infoframe *frame); + +struct dp_sdp; +ssize_t +hdmi_audio_infoframe_pack_for_dp(const struct hdmi_audio_infoframe *frame, + struct dp_sdp *sdp, u8 dp_version); enum hdmi_3d_structure { HDMI_3D_STRUCTURE_INVALID = -1,