From patchwork Thu Oct 21 09:27:03 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: 12574421 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91E1CC433F5 for ; Thu, 21 Oct 2021 09:28:54 +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 61BDF610CF for ; Thu, 21 Oct 2021 09:28:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 61BDF610CF 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=O2QHj2pVRke7sO98E9pcOjCv66Ad8y6MAyJahneOJ/s=; b=UzhI2oHhKdCl8T Qvo+X9WNLvryY6/Yn6BCnK7QeyUSircollOseSSm61YFEUqIJPKXVyXCP6LVAvdXBMZFz9ldo/a0R s1AwNO36fQwYKDyb08oYvxMfxRJ/D8DXcH7AU4SHPzNHitPDiH6HfMOu7sUXW6NRKetPZI+MJMc7S u6ySa/jS8eY7ZsCog5wxL75wPxS7O2mdSoTbGjjOxEZCJVeqRNK/banBCCW3K5gvz4z94ron51ExN Ufvy7ZzJtMyrXv/HeoG+VhYBTnaLJtpAobduJAFj0Qrco36D1MsoHgxnfK6mWubER1EObIiA9a7ac pZBIFCohtfwc7v1SV6Aw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mdUNQ-0071Lt-09; Thu, 21 Oct 2021 09:28:44 +0000 Received: from mail-wr1-x42c.google.com ([2a00:1450:4864:20::42c]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mdUMD-0070r7-Jw for linux-mediatek@lists.infradead.org; Thu, 21 Oct 2021 09:27:34 +0000 Received: by mail-wr1-x42c.google.com with SMTP id d3so776530wrh.8 for ; Thu, 21 Oct 2021 02:27:28 -0700 (PDT) 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=qeDnF7/0L+8b2rsbo3X+Y/DSsOq81VJxq7sH0PX/jgg=; b=qgsnpx/RZZZIlkg3blRJpx+fNLURtDt3YPM/YyTmYwt96Qk5M6N33kM9QgG8dqlnVm egOrP/QQg3iUi5nQdIGBnk1fWxS2/gHBsp4SXsM85oMcKWZULxEnLGotDjt5KZsflU9g zcYu3ditZ1gI9jdWys9aUHoHDYidVSOUqNIUdYy55QbQk56ZilofrxY80Vz72QQ4QvwU cMgG/47IcJuhNMmFi7Ww5hCFuJ8fgrX24IF3LETQk1UWeJuh9KiQSH3Jvpphi03xraS3 FBPgJ4CoGuVbAWTkswA9z+WFXOngKE9A3dn+PiewY0ShQVo32h39om1x/tOeJbb1K40Y +Kkw== 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=qeDnF7/0L+8b2rsbo3X+Y/DSsOq81VJxq7sH0PX/jgg=; b=3EVr3rDU2rWhgJZwGAg0HqKS0h20xReBL1fLMdr39xFyDFszxmVOonR6zdEryQpawv O+/omz09Yy7ukyisIovb3aBIDJt1dl/BOVP695u+blTje5R9rg7HLRsMn1Bn1EsTprAR Md/Y1AHVSrjjA5Gt/aNVcgGp0lItO3MtI5znqlBXZaG9/l2JIMY430tDKaHWYyP93C+n j+y+VeZHitFvyoisaKqARY3nt8HX5xfzzfELPnXveQAvW7UpN4nvvCH74DFjtK9Oo3kc 0JsS7mV4YecKjBz7W6MfQhyeo0tqJQbkwrSyVL9AZD8HUGHSqQYY+uJsVfGCiA9QwpVa 4VUw== X-Gm-Message-State: AOAM530Sz6vrOUKiG7bTZwzZ/BI1CLHnggdu9F2bBrKiHpRFGFk9hENR eDy1Wp9qtkX8cspXeL9eWJMFeUhNfqw3qQ== X-Google-Smtp-Source: ABdhPJwejVMxhYU2Zdtnyq+RbFnV+hQV50Qtn36ndWXi79BhR/j5DFjP4gSotD5R7kzCOqhnrev48w== X-Received: by 2002:a5d:448e:: with SMTP id j14mr5875355wrq.30.1634808447720; Thu, 21 Oct 2021 02:27:27 -0700 (PDT) Received: from blmsp.lan ([2a02:2454:3e6:c900:5142:5fbb:5821:5dc3]) by smtp.gmail.com with ESMTPSA id d3sm4538468wrb.36.2021.10.21.02.27.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Oct 2021 02:27:27 -0700 (PDT) From: Markus Schneider-Pargmann To: Chun-Kuang Hu , Philipp Zabel , Rob Herring , Vinod Koul Cc: Sam Ravnborg , dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-phy@lists.infradead.org, devicetree@vger.kernel.org, Markus Schneider-Pargmann Subject: [PATCH v5 3/7] drm/edid: Add cea_sad helpers for freq/length Date: Thu, 21 Oct 2021 11:27:03 +0200 Message-Id: <20211021092707.3562523-4-msp@baylibre.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211021092707.3562523-1-msp@baylibre.com> References: <20211021092707.3562523-1-msp@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211021_022729_666649_E6467494 X-CRM114-Status: GOOD ( 14.18 ) 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 --- Notes: Changes v2 -> v3: - Add DRM_ prefix to the CEA_SAD defines. Changes v1 -> v2: - Use const struct pointers. - Add a check whether the format is actually uncompressed or not. drivers/gpu/drm/drm_edid.c | 74 ++++++++++++++++++++++++++++++++++++++ include/drm/drm_edid.h | 18 ++++++++-- 2 files changed, 90 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 6325877c5fd6..c134803e18db 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4666,6 +4666,80 @@ 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(const struct cea_sad *sad) +{ + switch (sad->freq) { + case DRM_CEA_SAD_FREQ_32KHZ: + return 32000; + case DRM_CEA_SAD_FREQ_44KHZ: + return 44100; + case DRM_CEA_SAD_FREQ_48KHZ: + return 48000; + case DRM_CEA_SAD_FREQ_88KHZ: + return 88200; + case DRM_CEA_SAD_FREQ_96KHZ: + return 96000; + case DRM_CEA_SAD_FREQ_176KHZ: + return 176400; + case DRM_CEA_SAD_FREQ_192KHZ: + return 192000; + default: + return -EINVAL; + } +} +EXPORT_SYMBOL(drm_cea_sad_get_sample_rate); + +static bool drm_cea_sad_is_uncompressed(const struct cea_sad *sad) +{ + switch (sad->format) { + case HDMI_AUDIO_CODING_TYPE_STREAM: + case HDMI_AUDIO_CODING_TYPE_PCM: + return true; + default: + return false; + } +} + +/** + * 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(const struct cea_sad *sad) +{ + if (!drm_cea_sad_is_uncompressed(sad)) { + DRM_WARN("Unable to get the uncompressed word length for a compressed format: %u\n", + sad->format); + return -EINVAL; + } + + switch (sad->byte2) { + case DRM_CEA_SAD_UNCOMPRESSED_WORD_16BIT: + return 16; + case DRM_CEA_SAD_UNCOMPRESSED_WORD_20BIT: + return 20; + case DRM_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 deccfd39e6db..9d75df652b17 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 DRM_CEA_SAD_FREQ_32KHZ BIT(0) +#define DRM_CEA_SAD_FREQ_44KHZ BIT(1) +#define DRM_CEA_SAD_FREQ_48KHZ BIT(2) +#define DRM_CEA_SAD_FREQ_88KHZ BIT(3) +#define DRM_CEA_SAD_FREQ_96KHZ BIT(4) +#define DRM_CEA_SAD_FREQ_176KHZ BIT(5) +#define DRM_CEA_SAD_FREQ_192KHZ BIT(6) + +#define DRM_CEA_SAD_UNCOMPRESSED_WORD_16BIT BIT(0) +#define DRM_CEA_SAD_UNCOMPRESSED_WORD_20BIT BIT(1) +#define DRM_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(const struct cea_sad *sad); +int drm_cea_sad_get_uncompressed_word_length(const struct cea_sad *sad); int drm_av_sync_delay(struct drm_connector *connector, const struct drm_display_mode *mode);