From nobody Thu Oct 2 13:01:35 2025 Received: from mail-wr1-f45.google.com (mail-wr1-f45.google.com [209.85.221.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AAB2E28C84F for ; Tue, 16 Sep 2025 14:22:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758032532; cv=none; b=UJF/+MN9YVImoeVVwel23iLHwLh21vLc3E7gP/aGzF4y4VFjBRhLuaVrG861W9yDdM9mHq16Y5mqDPcVR0bl5xC5oWrPEbmmDO4w2qkXd4P9EsHQFwy6jlyFQp2UoZ4MmUB4qZ3k///eij5y+/BLY8s5mPjzXchwYDmqgPDB75A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758032532; c=relaxed/simple; bh=S16ECLvytyLmOv2TFGMROw+zdnonrMQxJZVeq+GI71U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=IvNxwxq/wKwTID5Xy3kog6QyTyAtDQ1TYCdvUXHoq8bZzvpu/j2e7VftSYjHyNNshCankBYSzlfAX+iX0iqcVi8Vq6nywr4sZ7VbPvVP3vPMyKyjFUCtDcfPqvc7W+ugw1v3WJvCD0MZcoIphu5NjtzUNiuwTztoYC2d0yAQuQI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=XLtdruPi; arc=none smtp.client-ip=209.85.221.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="XLtdruPi" Received: by mail-wr1-f45.google.com with SMTP id ffacd0b85a97d-3eb0a50a4c3so1517713f8f.1 for ; Tue, 16 Sep 2025 07:22:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1758032529; x=1758637329; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=pl1jcFzXvRWCuO/5MhdLryyBckGIL24XMYEjQYGJmG0=; b=XLtdruPi07bATKjGB7WBmahu9AXObkmiq8xWhkmB7qS1u1kL+Ksuynkxp/lnqrDf1U zokSqdx0e7PmItaWHJ3VFToab/B3JfV/tgDkG4NzX7Yd+09Frv8rrhLpK6MFxlTiJt9e kZJSi7oD5MmAHIVD485CnVhfPeySVMaiNtkPXw1quWBbCRgcX2FDDY5Bhq90I+1yKp2v pnn2UeXTbBRAzpiAl8ACW5c88OgyCLKN3jA8Gkxh0U9NNLOpJolgA13CLla/66wxtDJW CNIvw3Ez4/H+2rugt+mIrsscx/4yhw9Ltzv3200BStNZN7AzjLe4faEPam8rRCNGbt2M YqKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758032529; x=1758637329; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=pl1jcFzXvRWCuO/5MhdLryyBckGIL24XMYEjQYGJmG0=; b=TjhZica6g4A9n0pj/i6rC8VPs7s/LC+Vdyk8Ijd8FIEBioKWvXuVQVQDWuoXjuuc2c ymljt0AGbE/U3+D4yDvTiFPKwKbUEJeeVOE9HcQ1glRqz528L8rCVSQ3Q9kuZdjRYsFl a+PIeZdYUO/Dusv/94Q5x8Mp2HTFlT/Cz1W59qVYCAKsj26ts9CKL2/FOJHiPKq9YVt2 RE64JDge+Q2JhS3z91tHgIDQ46jzzgwFBTKK/SVQfQ1yc3rSqoERhQPmEK9tpZ5TjsaE PC4Gg44N4NNgbrLRYytAkFFAsBJcPMwtGgXcgt+zalgVOnybChYjDmF/8rGruo6Lo8Qr vxPQ== X-Forwarded-Encrypted: i=1; AJvYcCXvRxz8aI/KMhYYdQ/KQGOnKVf9ALdCdQQomKkQMyIuZ9Isnin2fADWu2LgfIxFEdqlUNAW9xHy6TGCF9o=@vger.kernel.org X-Gm-Message-State: AOJu0Yz7GCvejAKr2XgoFa5fFMKaHiylrNO7e7Rggbwci4f3BTARSyhe DFODRxIn/IdPbIY4LkZ82HHKUH2gWzGnzxsJo+mT87nSQjB/e/pSyA1X X-Gm-Gg: ASbGncuqvi8Pnj/UoqDFozlUw5owhbKOqLQMn3DCBSC8f5NEvDqO5lJuilPTstKAo1+ QLhypfalsoGNmG3VHcWRcpUn8PWfxK7EsxAri4T3P23XVLzC1RHYvslNYPnO9CE6Mllq5NaAMtt sW6pAfYc9tFLMBTmgvU6kt0v8t5iXhbR4iDjPPoAxgYkBdE5fjaNGuztbXXZAITN7OHKBQrXC7P Lf8yv8a0Zzr8IxRp02pdN7YrGoa1pr5WXH512Y8JAowIu4w50UES5oZ65Pb6A1FM3JIr9dRo2mU x7J99nP75hlXELjwi1Cg3vi4CZTqB+vhOwN13O+fkrbbVQ/TMNI4v2qp0otCug7nIe0gzXaYQoY dRPBMFTfNiCHEaFYVaHnjTyp1C1cItG0UwXYwG6mfor+c4eeBGBbtd6MD8JVtn3aP2Gd0vee1GT PrXmtsoGhaOhzejgPAUKruvgTXwIuFcuAEtp909w== X-Google-Smtp-Source: AGHT+IEfo6dIZQgb+2KQqBaq9k8zgeodNBoQBmoTlSmN4T18NxGs2JJXZCHspCns20/kog8GcmY8rQ== X-Received: by 2002:a05:6000:3112:b0:3ea:e0fd:290a with SMTP id ffacd0b85a97d-3eae0fd2e16mr6354578f8f.12.1758032528799; Tue, 16 Sep 2025 07:22:08 -0700 (PDT) Received: from emanuele-nb.corp.toradex.com (248.201.173.83.static.wline.lns.sme.cust.swisscom.ch. [83.173.201.248]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45e037c4490sm225090165e9.19.2025.09.16.07.22.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Sep 2025 07:22:07 -0700 (PDT) From: Emanuele Ghidoli To: Cc: Emanuele Ghidoli , Douglas Anderson , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jayesh Choudhary , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v1] drm/bridge: ti-sn65dsi86: Transition to LP mode on every video line Date: Tue, 16 Sep 2025 16:20:43 +0200 Message-ID: <20250916142047.3582018-1-ghidoliemanuele@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Emanuele Ghidoli The component datasheet recommends, to reduce power consumption, transitioning to LP mode on every video line. Enable the MIPI_DSI_MODE_VIDEO_NO_HFP and MIPI_DSI_MODE_VIDEO_NO_HBP flags so that the bridge can enter LP mode during the horizontal front porch and back porch periods. Signed-off-by: Emanuele Ghidoli --- Cc: Douglas Anderson Cc: Andrzej Hajda Cc: Neil Armstrong Cc: Robert Foss Cc: Laurent Pinchart Cc: Jonas Karlman Cc: Jernej Skrabec Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Simona Vetter Cc: Jayesh Choudhary Cc: Cc: --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge= /ti-sn65dsi86.c index ae0d08e5e960..957e9abd46c3 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -689,7 +689,8 @@ static int ti_sn_attach_host(struct auxiliary_device *a= dev, struct ti_sn65dsi86 /* TODO: setting to 4 MIPI lanes always for now */ dsi->lanes =3D 4; dsi->format =3D MIPI_DSI_FMT_RGB888; - dsi->mode_flags =3D MIPI_DSI_MODE_VIDEO; + dsi->mode_flags =3D MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_NO_HFP | + MIPI_DSI_MODE_VIDEO_NO_HBP; =20 /* check if continuous dsi clock is required or not */ pm_runtime_get_sync(dev); --=20 2.43.0