From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 BF75EC433F5 for ; Mon, 6 Sep 2021 19:37:14 +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 6CE7460F25 for ; Mon, 6 Sep 2021 19:37:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 6CE7460F25 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3F9C589C0A; Mon, 6 Sep 2021 19:37:06 +0000 (UTC) Received: from mail-wr1-x429.google.com (mail-wr1-x429.google.com [IPv6:2a00:1450:4864:20::429]) by gabe.freedesktop.org (Postfix) with ESMTPS id BF7A689B38 for ; Mon, 6 Sep 2021 19:37:04 +0000 (UTC) Received: by mail-wr1-x429.google.com with SMTP id i6so11206488wrv.2 for ; Mon, 06 Sep 2021 12:37:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=rCTzkZjxAR3yPntjhPl5/v+go5uJQqFyVCtShSMvS8s=; b=YIMMT91D2ae2cWaA3DDabg5Ng2o3oNGdbiBeJtAMtFTcowr2RqGkddEEgdiWD70j2q t8IQwikt4/3zeSD8FdZCLdGxxnDjEiLBFRFheG/aTfFiyEl144iPkIa5tKxoCGCFHBEP TbWgqXemzsVQj1GoJbIRn10IwV0ug0zuO9U4di6cgc4luySp8l380ZfZm3bdQK+fvkJV hvFD33kcdrPAWVGJM7D3zye/y7K+L8POB4wlgmCBMueidw6N4K6Dy/WRTuIyu5hOLdwv FODQz1E5L0/339wu817YpUwIKI7xrhd3Dv4c8yQ5LXnGfXEr7rohgvhtha3pezxELJ+8 v+fw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=rCTzkZjxAR3yPntjhPl5/v+go5uJQqFyVCtShSMvS8s=; b=e/qWdD/PebUFcrqiKuBuIwMZtL8xqAE6JnJVLXil6QiYdPwiQziLQD0B1AUF1cntYn tlpplYXPHPeoTBCB4S9BYY79pEyVK2VMlh5BMeuoMarzif6/n+2/fq6T/vN524kYZ3VC cWGC95BxQ6F85417riTejfvS+3aSxSA/avvcbJh3bUH8hSrREqBNbfHbP3+oxaSN4W5u S/1RBhAASl5Cl06Zww4Jvj07OGWcU4HQ/nS8Bx9ff2Hx5xeLaNbju3HkzDhx6o7GjvLh ki8rnz1b9swjCXEE4Ox8gf3+L8ASiyhZkieYexGJtg/Di7zMRjBqavs6Cp/lWkZyuPav r3Ug== X-Gm-Message-State: AOAM530uTj6V85F6vbKZt3v3/6/avQOfZkVuCSR86Cih0NZAp5/I8b11 XwZko6uDar5KKRXFhz3e3L30jA== X-Google-Smtp-Source: ABdhPJw+SQEEcIoMtB3u+8hG/+1N90IseBx2tpu8H2Km4BwrrRoywYqOx3e1ukyR1U84aGovNybYIA== X-Received: by 2002:adf:c449:: with SMTP id a9mr15137691wrg.256.1630957023305; Mon, 06 Sep 2021 12:37:03 -0700 (PDT) Received: from blmsp.lan ([2a02:2454:3e6:c900::97e]) by smtp.gmail.com with ESMTPSA id w29sm8815202wra.88.2021.09.06.12.37.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Sep 2021 12:37:03 -0700 (PDT) From: Markus Schneider-Pargmann To: Chun-Kuang Hu , Philipp Zabel Cc: Sam Ravnborg , dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Markus Schneider-Pargmann Subject: [PATCH v1 3/6] drm/edid: Add cea_sad helpers for freq/length Date: Mon, 6 Sep 2021 21:35:26 +0200 Message-Id: <20210906193529.718845-4-msp@baylibre.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210906193529.718845-1-msp@baylibre.com> References: <20210906193529.718845-1-msp@baylibre.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This patch adds two helper functions that extract the frequency and word length from a struct cea_sad. For these helper functions new defines are added that help translate the 'freq' and 'byte2' fields into real numbers. Signed-off-by: Markus Schneider-Pargmann --- drivers/gpu/drm/drm_edid.c | 57 ++++++++++++++++++++++++++++++++++++++ include/drm/drm_edid.h | 18 ++++++++++-- 2 files changed, 73 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 81d5f2524246..2389d34ce10e 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4666,6 +4666,63 @@ int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb) } EXPORT_SYMBOL(drm_edid_to_speaker_allocation); +/** + * drm_cea_sad_get_sample_rate - Extract the sample rate from cea_sad + * @sad: Pointer to the cea_sad struct + * + * Extracts the cea_sad frequency field and returns the sample rate in Hz. + * + * Return: Sample rate in Hz or a negative errno if parsing failed. + */ +int drm_cea_sad_get_sample_rate(struct cea_sad *sad) +{ + switch (sad->freq) { + case CEA_SAD_FREQ_32KHZ: + return 32000; + case CEA_SAD_FREQ_44KHZ: + return 44100; + case CEA_SAD_FREQ_48KHZ: + return 48000; + case CEA_SAD_FREQ_88KHZ: + return 88200; + case CEA_SAD_FREQ_96KHZ: + return 96000; + case CEA_SAD_FREQ_176KHZ: + return 176400; + case CEA_SAD_FREQ_192KHZ: + return 192000; + default: + return -EINVAL; + } +} +EXPORT_SYMBOL(drm_cea_sad_get_sample_rate); + +/** + * drm_cea_sad_get_uncompressed_word_length - Extract word length + * @sad: Pointer to the cea_sad struct + * + * Extracts the cea_sad byte2 field and returns the word length for an + * uncompressed stream. + * + * Note: This function may only be called for uncompressed audio. + * + * Return: Word length in bits or a negative errno if parsing failed. + */ +int drm_cea_sad_get_uncompressed_word_length(struct cea_sad *sad) +{ + switch (sad->byte2) { + case CEA_SAD_UNCOMPRESSED_WORD_16BIT: + return 16; + case CEA_SAD_UNCOMPRESSED_WORD_20BIT: + return 20; + case CEA_SAD_UNCOMPRESSED_WORD_24BIT: + return 24; + default: + return -EINVAL; + } +} +EXPORT_SYMBOL(drm_cea_sad_get_uncompressed_word_length); + /** * drm_av_sync_delay - compute the HDMI/DP sink audio-video sync delay * @connector: connector associated with the HDMI/DP sink diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index 759328a5eeb2..bed091a749ef 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -361,12 +361,24 @@ struct edid { /* Short Audio Descriptor */ struct cea_sad { - u8 format; + u8 format; /* See HDMI_AUDIO_CODING_TYPE_* */ u8 channels; /* max number of channels - 1 */ - u8 freq; + u8 freq; /* See CEA_SAD_FREQ_* */ u8 byte2; /* meaning depends on format */ }; +#define CEA_SAD_FREQ_32KHZ BIT(0) +#define CEA_SAD_FREQ_44KHZ BIT(1) +#define CEA_SAD_FREQ_48KHZ BIT(2) +#define CEA_SAD_FREQ_88KHZ BIT(3) +#define CEA_SAD_FREQ_96KHZ BIT(4) +#define CEA_SAD_FREQ_176KHZ BIT(5) +#define CEA_SAD_FREQ_192KHZ BIT(6) + +#define CEA_SAD_UNCOMPRESSED_WORD_16BIT BIT(0) +#define CEA_SAD_UNCOMPRESSED_WORD_20BIT BIT(1) +#define CEA_SAD_UNCOMPRESSED_WORD_24BIT BIT(2) + struct drm_encoder; struct drm_connector; struct drm_connector_state; @@ -374,6 +386,8 @@ struct drm_display_mode; int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads); int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb); +int drm_cea_sad_get_sample_rate(struct cea_sad *sad); +int drm_cea_sad_get_uncompressed_word_length(struct cea_sad *sad); int drm_av_sync_delay(struct drm_connector *connector, const struct drm_display_mode *mode); -- 2.33.0