From nobody Mon Feb 9 02:12:56 2026 Received: from sender4-pp-f112.zoho.com (sender4-pp-f112.zoho.com [136.143.188.112]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C394B4949E2; Wed, 21 Jan 2026 14:46:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.112 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769006799; cv=pass; b=E1YKQuOt1a7FPhcFxrXlUd8ReDkjdKMeIobnCX2Qpk9t2YNXssWoPfwrBxHkdaSBJ8eNyz936ZdoDdvjKTPWeLoR0pg1+XsTTtS31eNIRhbPtkosDqt+KsILGvlbR3CwrtRHy4ofntKNSNBrC1hZDWuwMduzj/3TK8EnH0Ji5bo= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769006799; c=relaxed/simple; bh=9HBU3ZaACAcIsebkqHtKZYFeX/GMGtzTvX54B19jrTo=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=E+cY8v21uOzdZ34iXFqP9CX76Vr98GflMBf7gsan7mxSPrxspd8oKIJnvRkMAzDpdJlnPysQ8FeKPf4zpoivREVjMIEmnWqzD1HrnOc3la78AMWcXDNxH9rtJKNZzaUjBSkhLk5EaGoxy0WLYLpriYG2sJk64OmJCAtQU+X3TMo= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=nicolas.frattaroli@collabora.com header.b=iO6FQYjn; arc=pass smtp.client-ip=136.143.188.112 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=nicolas.frattaroli@collabora.com header.b="iO6FQYjn" ARC-Seal: i=1; a=rsa-sha256; t=1769006756; cv=none; d=zohomail.com; s=zohoarc; b=MgYsQQddbifBnu+nOkEzNQw1WU+VigUHVK9sLKhal9livHe1Y9HsIxSMyW+I9+0AjfeEhvWyqLKc12IeLG5HCLaHibvjB/4TwenLxp5ZibkpQ+Ha1n8At+gqyFIXnw7gFMGzXFaK+05ah8S1SyRrh64mMV+FcFodhr+74MoWFq4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1769006756; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=8tbnRLxC7YN9OmZ6Ssd8CDhleEgMPvrSDskSel3YjYw=; b=D2CXptLAku/drVkwAoCDRhnKHOlAmO3vKSFB5O5bHIR4EcL7m5wF1G+vCUuydtUVC8NtM9VJ4ZO0EPPVBZSIPWEhCAaO3qh1RnTF0lFPqryVluxX/dQ3RjUxwLz3MxmEf/71Sf5Lysll7/YxWZOI8NyvRqdszcnte6UZcWBu+P4= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=nicolas.frattaroli@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1769006755; s=zohomail; d=collabora.com; i=nicolas.frattaroli@collabora.com; h=From:From:Date:Date:Subject:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Message-Id:References:In-Reply-To:To:To:Cc:Cc:Reply-To; bh=8tbnRLxC7YN9OmZ6Ssd8CDhleEgMPvrSDskSel3YjYw=; b=iO6FQYjnegKcMOITAfY79lLHQa5UPzO8bc1xFaUWTCmwfumF/8huMt0H3MTsGzVI c22hr9QXVHp4s0bCLJuRiRksLYXIubarApwlxuDfxdnFx4OqFT2kxB3jddFa047TBu8 ZGLwvxQaiXqLoOkJa54kH0ywvmEE974SDVJOvpjk= Received: by mx.zohomail.com with SMTPS id 1769006754616214.55177118562654; Wed, 21 Jan 2026 06:45:54 -0800 (PST) From: Nicolas Frattaroli Date: Wed, 21 Jan 2026 15:45:10 +0100 Subject: [PATCH v7 03/22] drm: Add enum conversions between DRM_COLOR_FORMAT and HDMI_COLORSPACE Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260121-color-format-v7-3-ef790dae780c@collabora.com> References: <20260121-color-format-v7-0-ef790dae780c@collabora.com> In-Reply-To: <20260121-color-format-v7-0-ef790dae780c@collabora.com> To: Harry Wentland , Leo Li , Rodrigo Siqueira , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Andy Yan , Jani Nikula , Rodrigo Vivi , Joonas Lahtinen , Tvrtko Ursulin , Dmitry Baryshkov , Sascha Hauer , Rob Herring , Jonathan Corbet Cc: kernel@collabora.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-doc@vger.kernel.org, Nicolas Frattaroli , Marius Vlad X-Mailer: b4 0.14.3 While the two enums have similar values, they're not identical, and HDMI's enum is defined as per the HDMI standard. Add a simple conversion function from DRM to HDMI. Unexpected inputs aren't handled in any clever way, DRM_COLOR_FORMAT_AUTO and any other value that doesn't cleanly map to HDMI just gets returned as HDMI_COLORSPACE_RGB. Add a second conversion function that gets a DRM_COLOR_FORMAT from an HDMI_COLORSPACE as well. In this case, reserved HDMI values that can't be converted will result in an -EINVAL return value. Co-developed-by: Marius Vlad Signed-off-by: Marius Vlad Signed-off-by: Nicolas Frattaroli --- include/drm/drm_connector.h | 54 +++++++++++++++++++++++++++++++++++++++++= ++++ 1 file changed, 54 insertions(+) diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index b5604dca728a..ffeb42f3b4a3 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -2612,6 +2612,60 @@ int drm_connector_attach_color_format_property(struc= t drm_connector *connector); =20 const char *drm_get_color_format_name(enum drm_color_format color_fmt); =20 +/** + * drm_color_format_to_hdmi_colorspace - convert DRM color format to HDMI + * @fmt: the &enum drm_color_format to convert + * + * Convert a given &enum drm_color_format to an equivalent + * &enum hdmi_colorspace. For non-representable values and + * %DRM_COLOR_FORMAT_AUTO, the value %HDMI_COLORSPACE_RGB is returned. + * + * Returns: the corresponding &enum hdmi_colorspace value + */ +static inline enum hdmi_colorspace __pure +drm_color_format_to_hdmi_colorspace(enum drm_color_format fmt) +{ + switch (fmt) { + default: + case DRM_COLOR_FORMAT_AUTO: + case DRM_COLOR_FORMAT_RGB444: + return HDMI_COLORSPACE_RGB; + case DRM_COLOR_FORMAT_YCBCR444: + return HDMI_COLORSPACE_YUV444; + case DRM_COLOR_FORMAT_YCBCR422: + return HDMI_COLORSPACE_YUV422; + case DRM_COLOR_FORMAT_YCBCR420: + return HDMI_COLORSPACE_YUV420; + } +} + +/** + * drm_color_format_from_hdmi_colorspace - convert HDMI color format to DRM + * @fmt: the &enum hdmi_colorspace to convert + * + * Convert a given &enum hdmi_colorspace to an equivalent + * &enum drm_color_format. For non-representable values, + * %-EINVAL is returned. + * + * Returns: the corresponding &enum drm_color_format value, or %-EINVAL + */ +static inline enum drm_color_format __pure +drm_color_format_from_hdmi_colorspace(enum hdmi_colorspace fmt) +{ + switch (fmt) { + default: + return -EINVAL; + case HDMI_COLORSPACE_RGB: + return DRM_COLOR_FORMAT_RGB444; + case HDMI_COLORSPACE_YUV444: + return DRM_COLOR_FORMAT_YCBCR444; + case HDMI_COLORSPACE_YUV422: + return DRM_COLOR_FORMAT_YCBCR422; + case HDMI_COLORSPACE_YUV420: + return DRM_COLOR_FORMAT_YCBCR420; + } +} + /** * drm_for_each_connector_iter - connector_list iterator macro * @connector: &struct drm_connector pointer used as cursor --=20 2.52.0