From patchwork Fri Feb 18 14:54:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guillaume Ranquet X-Patchwork-Id: 12751524 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 58950C433EF for ; Fri, 18 Feb 2022 15:03:25 +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=Doq2QHFe16jWymkC1xcMD4m/lQOzBKWDng6iG+am4Mo=; b=1CaPK4v1+XWRfL kjdCGnBeKz3e39NxNyKG4LPsxuOAIusLDkelTXviGz1bmpDYbjeZssr61Myp6bjISubKGtD8tDbvt etbCmFXKxTUJCWb6SKDirGD9gZfmPp+h81aDra8jk+yx5OU7S+beMj/PIMIhjBjlJxVIdJVGGze5r yq78fStIJ6Fp5Oacl4vOG3AGZGhsTS4e/y2uHgvBU7wTqaAr2eaKpy4H97dU57Rb6YxqawsELDtBG It1lTf2f61wuMG5mwlThkdboP4fGQSLR2Juk3AzaEqASdWOt9idk1HKuMpJ61O2TmBYDG6ceSVbWi OQUyLfU99/J9CHq0Lifw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nL4my-00EwL9-WF; Fri, 18 Feb 2022 15:03:17 +0000 Received: from mail-wr1-x42b.google.com ([2a00:1450:4864:20::42b]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nL4g1-00Erzw-8F for linux-mediatek@lists.infradead.org; Fri, 18 Feb 2022 14:56:08 +0000 Received: by mail-wr1-x42b.google.com with SMTP id f3so14887008wrh.7 for ; Fri, 18 Feb 2022 06:56:04 -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=nJkHxY5AR6xqJWj38hKMvv+Z6LskhPZHMXhRMUaTZBg=; b=d4/A7tapqhoj+nKQknbI9myUskve33mE681HrsO26zPtt277c7xD5xX1OUlmAVlFMM GazLRWwYi7bBKTz0B+bjiXXoNTZPLzZ6xgpE/oHg8wA+lSQYCx4M33ob2H0UmVjv7HyZ Hv3bJhIlhPfm0Yo9043I6dnA8OZ4xd38JXmZwzeziS7hSM8e6qmSv8n0s81VklGSqHX9 vadFGHdH+6mdVgHOCY8KY/dF7owTVl4GJTmNe+rdf+deBJWkw2N9SlRpAwhVHJ1I87H6 ExctPr4MqPcB5h6o47uN6YRYlXtxsK3BPfBQpkMbqDG3w12PaIbJTsy1tUCEImY8HjP1 GaHQ== 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=nJkHxY5AR6xqJWj38hKMvv+Z6LskhPZHMXhRMUaTZBg=; b=PgdojizDtKh9qSvmKUCMkfC/aRGue5AKNcYnM0I/2/lRhD4/zG2HDq0Ri5Dfv6Z/ZS htZozrRkntlkagN8XLbBA2OE8s4jj+3Ojri6ydTa2uI21PZWNTjKRpauC5IvR9fHTsNa unUbm/jJoPaTzbE90MaOXOqW6b3tXxqXClQg8plxuqbLcAF8vR/rD4Xh7hapLIgt2uQ4 H3ERlVT8NCl8a88URqmegz7k2paiHT2hHKWb97NNoUYkFuzr42/cWHGL3cuoRB3B6yJm XRlRaDHJs/5Mf5ci/7vCRgKTf+VYaxtyLtSJF4J5R6wJ5F0O+ku9fsD99IxkvmS9PvAK 4I3g== X-Gm-Message-State: AOAM5308UQAGL/YWS6U9eZ+ozD8OpMkexXpXPwVXNSeKH0qT+gHpUsBi 5sARwojKtEtCglGTAw/gW/ZIvg== X-Google-Smtp-Source: ABdhPJzKg+0QXkil1m7jx6gI2ctEKlAP5e/CL5A6ueJGTjphI0RFc7JztgkWPfSY1UibxXF5qSrFxg== X-Received: by 2002:adf:8170:0:b0:1e0:6087:9d42 with SMTP id 103-20020adf8170000000b001e060879d42mr6297395wrm.217.1645196163141; Fri, 18 Feb 2022 06:56:03 -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.8.2022.02.18.06.56.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Feb 2022 06:56:02 -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 03/19] drm/edid: Add cea_sad helpers for freq/length Date: Fri, 18 Feb 2022 15:54:21 +0100 Message-Id: <20220218145437.18563-4-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_065605_392883_EBF34067 X-CRM114-Status: GOOD ( 14.39 ) 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 From: Markus Schneider-Pargmann 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 Signed-off-by: Guillaume Ranquet --- 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 12893e7be89bb..500279a82167a 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4747,6 +4747,80 @@ 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 18f6c700f6d02..a30452b313979 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);