From patchwork Mon Sep 6 19:35:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Schneider-Pargmann X-Patchwork-Id: 12477281 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=-17.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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=unavailable 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 88A50C433EF for ; Mon, 6 Sep 2021 19:37:56 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 4CC5A60F25 for ; Mon, 6 Sep 2021 19:37:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 4CC5A60F25 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.infradead.org 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=2E5rBX9BEIcie/Ff8ycDZi45nWcmAzWD1NN8UDtkZr0=; b=BmHWfXlhaGPhdg cwCBz2rZLnYLWhOvIB3it0HSmF+TiK2QBbC+HXt35tsnM/3HjQcs0UEquoSv687NvDZRwaTY4FA+R NAcKentzvZlJO2dS5+GeswKn5yKSSFOJ5p/qzXZomRBfm8APYYvFhii2dM20CoZv3ZmOjNjz0smYn uYIdtT+5C2M8F3zgmIq+E8McfbT1AOkry8e6kdNsSNgILiLTRe1VNtEPmcwLHdVKg+G3B7isv8viK LCnO3mK94S9M9vmtzQ1JRRp/vDrPpyt1iqqLLW4o9HSjANZuC95E+dESqeaJP7qNjYC7sf8So0876 yCj4TPebq4yTHDKRVzRA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mNKR6-001liX-6t; Mon, 06 Sep 2021 19:37:44 +0000 Received: from mail-wr1-x42a.google.com ([2a00:1450:4864:20::42a]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mNKQS-001lR5-Lh for linux-mediatek@lists.infradead.org; Mon, 06 Sep 2021 19:37:08 +0000 Received: by mail-wr1-x42a.google.com with SMTP id n5so11167006wro.12 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=TheYl1ybHJA4RNEFYP4v84zHDhHBjB6eEZuWtugmrSoN1P5hTItu0GXRd6WDzhgBTQ lFWjPSFaOnJJRS4HFhHQ7QwtV4LC8Olf/N4OK+yAVZVuWjdriOqqkpwWBbWuV3bDtbhx CXD+vCWdz6VYKO605jeivyoBACL6i7YzNcl168O0MDKXvzBBpI1uXBKI55NszT9PcEfs eXpuYsSsa2szn1R63+9zLYA2FIt/AsARRfE9s+Vr+XPq7pwUfgKd8v2RBzcg/AgSRHBJ 4/kyI8tKsqChk5YdQ+ZNCWxrPMxRlLF/2H6Vw6CtUewfKUf1eU7NwphqcGTc/n0nUwYE c80Q== X-Gm-Message-State: AOAM531DbU1S8BvZzYQB2jV/zWRkF2xmdZGjBUy+lHrtLVtrV/h9Tkpb eYP1ZX45JgTUuWx+TgR/D9bmVQ== 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210906_123704_776468_C9E9625F X-CRM114-Status: GOOD ( 13.36 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org 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);