From nobody Mon Feb 9 19:05:34 2026 Received: from mail-m32121.qiye.163.com (mail-m32121.qiye.163.com [220.197.32.121]) (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 64FB13EBF05; Tue, 27 Jan 2026 07:03:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.32.121 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769497442; cv=none; b=S/Ms6pirofDfODDAsmQ102yZqRRiby+WVJ0DAXfTTSg7Mfdm6GzM7T3tFBK8PuppUAq6aMk4bU1899m7OtWiMINHr9719QxC5sWnqAhwebPba0ifQKMD0G/U1010CM9/Xx2E8XtXqCYl690IPWBPycw9EvNSiI9WFv5LNdVjMKk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769497442; c=relaxed/simple; bh=+Pv6gcNjmGIsB6pG7/SZQq9lEGv2XyzQQDiyl47U7YQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ZrckQ+LEf3P9IncGqWwDHu4tvugnrpivIYsxq95tWm9q/0yrVcVij/Uhil8Z8ir8NujWfcTvgrGY4Y7G5J1MuzznmgFK3U9Ie+yrynJQEZHKOcieLMCgpbxPKgxfw5ezB1RH0NtbiNwe/Tp1gj1Fz/b14NIZF02QEQqhZBQ36SM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=thundersoft.com; spf=pass smtp.mailfrom=thundersoft.com; dkim=pass (1024-bit key) header.d=thundersoft.com header.i=@thundersoft.com header.b=hWA0CbzP; arc=none smtp.client-ip=220.197.32.121 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=thundersoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=thundersoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=thundersoft.com header.i=@thundersoft.com header.b="hWA0CbzP" Received: from [127.0.1.1] (unknown [36.129.139.90]) by smtp.qiye.163.com (Hmail) with ESMTP id 3219cb6a0; Tue, 27 Jan 2026 14:58:45 +0800 (GMT+08:00) From: Hongyang Zhao Date: Tue, 27 Jan 2026 14:58:12 +0800 Subject: [PATCH 2/3] drm/bridge: lt9611: Add support for DSI port B input 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: <20260127-rubikpi-next-20260116-v1-2-0286c75150c5@thundersoft.com> References: <20260127-rubikpi-next-20260116-v1-0-0286c75150c5@thundersoft.com> In-Reply-To: <20260127-rubikpi-next-20260116-v1-0-0286c75150c5@thundersoft.com> To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vinod Koul , Bjorn Andersson , Konrad Dybcio Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Hongyang Zhao , Roger Shimizu X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1769497120; l=1976; i=hongyang.zhao@thundersoft.com; s=20260127; h=from:subject:message-id; bh=+Pv6gcNjmGIsB6pG7/SZQq9lEGv2XyzQQDiyl47U7YQ=; b=KaMXFEbci4e/zyISqD5Glu84hQkseH0YbpTh/7ZkN5AWKyanSlY5IbCu0W9gYufHNmsPgL2Y0 POHr1XXEBc1AJgfGom4DDlIgetFaIMqJZi7OL8xehbMD1M59fui1m32 X-Developer-Key: i=hongyang.zhao@thundersoft.com; a=ed25519; pk=D9yL5W9Zj0lPBDAq9gzY++1849VlXuTWAkROzZ88J/4= X-HM-Tid: 0a9bfe3f61ff09d5kunm45ebbc0d8408c X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWS1ZQUlXWQ8JGhUIEh9ZQVkZSRlIVk8YGUtISRhPSkxPSFYVFAkWGhdVEwETFh oSFyQUDg9ZV1kYEgtZQVlITVVKSUJVSkhCVUJLWVdZFhoPEhUdFFlBWU9LSFVKS0lPT09IVUpLS1 VKQktLWQY+ DKIM-Signature: a=rsa-sha256; b=hWA0CbzP3LLCRucKmdVAue4mfZralg9tbQM7S87YCsuSBcwAZ8SvaZEfsLGySC+ylM39H1kgDxiLNDsqJdPNiRj1CAB1oDh4znaPZgwLTS1G1bYJpvAk3xKA399J2fVfcMSYLByH4dQj7epLIjogjT/tw3ZTQwt4it/oPdPiAlk=; c=relaxed/relaxed; s=default; d=thundersoft.com; v=1; bh=Gn8WftofV/WUtxSX1V56sQZANtqEqJ4TXz3vfEWBl+Q=; h=date:mime-version:subject:message-id:from; The LT9611 has two DSI input ports. The driver currently hardcodes Port A or Port A+B, but some boards connect DSI to Port B only. Add device tree property "lontium,dsi-port-b" to select Port B as the DSI input source. When set, configure port swap (0x8303 bit 6) and byte_clk source (0x8250 bit 3:2) for Port B. Signed-off-by: Hongyang Zhao Reviewed-by: Roger Shimizu --- drivers/gpu/drm/bridge/lontium-lt9611.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/brid= ge/lontium-lt9611.c index a2d032ee4744..178f056c9e85 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -47,6 +47,7 @@ struct lt9611 { struct mipi_dsi_device *dsi1; =20 bool ac_mode; + bool dsi_port_b; =20 struct gpio_desc *reset_gpio; struct gpio_desc *enable_gpio; @@ -116,6 +117,7 @@ static int lt9611_mipi_input_digital(struct lt9611 *lt9= 611, { 0x830a, 0x00 }, { 0x824f, 0x80 }, { 0x8250, 0x10 }, + { 0x8303, 0x00 }, { 0x8302, 0x0a }, { 0x8306, 0x0a }, }; @@ -123,6 +125,16 @@ static int lt9611_mipi_input_digital(struct lt9611 *lt= 9611, if (lt9611->dsi1_node) reg_cfg[1].def =3D 0x03; =20 + /* + * Select DSI input port: + * - 0x8303 bit 6: port swap (0=3DPortA, 1=3DPortB) + * - 0x8250 bit 3:2: byte_clk source (00=3DPortA, 01=3DPortB) + */ + if (lt9611->dsi_port_b) { + reg_cfg[3].def =3D 0x14; + reg_cfg[4].def =3D 0x40; + } + return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg= )); } =20 @@ -1024,6 +1036,8 @@ static int lt9611_parse_dt(struct device *dev, =20 lt9611->ac_mode =3D of_property_read_bool(dev->of_node, "lt,ac-mode"); =20 + lt9611->dsi_port_b =3D of_property_read_bool(dev->of_node, "lontium,dsi-p= ort-b"); + return drm_of_find_panel_or_bridge(dev->of_node, 2, -1, NULL, <9611->ne= xt_bridge); } =20 --=20 2.43.0