From nobody Mon Feb 9 23:14:57 2026 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (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 6139A23AE84 for ; Fri, 25 Apr 2025 10:28:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745576904; cv=none; b=kUPEitg2A76LZNBiL96wqBt/fipc8F9fXDPAfoXb8P5+9869C8RD/dKP71lg0NjedeLgypfr9kU8ufAgGUfDJaJ2+apcsF6w9fxrFoklfzYtYnLFoTMAmh4BrskskgnO3Z/MYAR9hq7yAFEF0pN7dgMDZjNZxjGLXUWjTLA5vrU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745576904; c=relaxed/simple; bh=hDK8q5L8c2jNpElW4zgOcFPPJjn+VRZ7mQuf0zc2rAA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=gJASREYdXhmNmE/scvw+D7fjiwBXK7RvJVTW76i/JaDP/uO3pkUMywEg4eie0OBzPLGRB/LzaRBVCbkrOeVLx9JlN0IKPVPaPdQFQSOcsOISwehzWoLX13MNuCyKcKCgtkqlJP34LNpipS9ogU72ThWa5Zyccz+/cjY7REyDitg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=jjnBbSXV; arc=none smtp.client-ip=148.251.105.195 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 (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="jjnBbSXV" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1745576900; bh=hDK8q5L8c2jNpElW4zgOcFPPJjn+VRZ7mQuf0zc2rAA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=jjnBbSXVImcY3mqQSVL78JWDQ7lD3DeSQDP8LDNyR2yRwgwluDFuiZDgWUCw1X4Gf PEI2rEsHDyIF4asAgcdUVc3nVlbTUKIClHiaHjtDkuQncDs7M3bkLhU8HFl4lD51ql 2hMiRgkGFI0F99smXsS9q2r/RFwlHUzsHG1k5yBNzxjBQocBTqA5ipYuyT4TVm1CpA dR6Hlr3gK02PjYjWD6JGR3dLRaRz8Z3F76MNKxe5XEfGipGWiyClmp2Ryf0l4rEPGO 9y9mlKF/oLD/1B2VWyxOY8ZUUJhaITwdkjK7mlCJveJAXFcuCHv7cNiCBJV1McBedb aVrqbN4oyfOjQ== Received: from localhost (unknown [82.76.59.226]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: cristicc) by bali.collaboradmins.com (Postfix) with UTF8SMTPSA id 8051417E36BB; Fri, 25 Apr 2025 12:28:20 +0200 (CEST) From: Cristian Ciocaltea Date: Fri, 25 Apr 2025 13:26:53 +0300 Subject: [PATCH v4 02/23] drm/connector: hdmi: Add support for YUV420 format verification 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: <20250425-hdmi-conn-yuv-v4-2-5e55e2aaa3fa@collabora.com> References: <20250425-hdmi-conn-yuv-v4-0-5e55e2aaa3fa@collabora.com> In-Reply-To: <20250425-hdmi-conn-yuv-v4-0-5e55e2aaa3fa@collabora.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Dave Stevenson , Dmitry Baryshkov , Dmitry Baryshkov , Dmitry Baryshkov Cc: kernel@collabora.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 Provide the necessary constraints verification in sink_supports_format_bpc() in order to support handling of YUV420 output format. Reviewed-by: Maxime Ripard Signed-off-by: Cristian Ciocaltea --- drivers/gpu/drm/display/drm_hdmi_state_helper.c | 39 +++++++++++++++++++++= ++-- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/= drm/display/drm_hdmi_state_helper.c index 45b154c8abb2cc731bf4be472e58815cf47463d4..eb284032ea794838f333ce63924= 3540fca91dbdb 100644 --- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c +++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c @@ -3,6 +3,7 @@ #include #include #include +#include #include =20 #include @@ -407,6 +408,11 @@ sink_supports_format_bpc(const struct drm_connector *c= onnector, return false; } =20 + if (drm_mode_is_420_only(info, mode) && format !=3D HDMI_COLORSPACE_YUV42= 0) { + drm_dbg_kms(dev, "Mode can be only supported in YUV420 format.\n"); + return false; + } + switch (format) { case HDMI_COLORSPACE_RGB: drm_dbg_kms(dev, "RGB Format, checking the constraints.\n"); @@ -437,9 +443,36 @@ sink_supports_format_bpc(const struct drm_connector *c= onnector, return true; =20 case HDMI_COLORSPACE_YUV420: - /* TODO: YUV420 is unsupported at the moment. */ - drm_dbg_kms(dev, "YUV420 format isn't supported yet.\n"); - return false; + drm_dbg_kms(dev, "YUV420 format, checking the constraints.\n"); + + if (!(info->color_formats & DRM_COLOR_FORMAT_YCBCR420)) { + drm_dbg_kms(dev, "Sink doesn't support YUV420.\n"); + return false; + } + + if (!drm_mode_is_420(info, mode)) { + drm_dbg_kms(dev, "Mode cannot be supported in YUV420 format.\n"); + return false; + } + + if (bpc =3D=3D 10 && !(info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_3= 0)) { + drm_dbg_kms(dev, "10 BPC but sink doesn't support Deep Color 30.\n"); + return false; + } + + if (bpc =3D=3D 12 && !(info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_3= 6)) { + drm_dbg_kms(dev, "12 BPC but sink doesn't support Deep Color 36.\n"); + return false; + } + + if (bpc =3D=3D 16 && !(info->hdmi.y420_dc_modes & DRM_EDID_YCBCR420_DC_4= 8)) { + drm_dbg_kms(dev, "16 BPC but sink doesn't support Deep Color 48.\n"); + return false; + } + + drm_dbg_kms(dev, "YUV420 format supported in that configuration.\n"); + + return true; =20 case HDMI_COLORSPACE_YUV422: drm_dbg_kms(dev, "YUV422 format, checking the constraints.\n"); --=20 2.49.0