From nobody Wed Dec 17 10:44:32 2025 Received: from mx07-00178001.pphosted.com (mx07-00178001.pphosted.com [185.132.182.106]) (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 9A42FC8D1 for ; Fri, 12 Jul 2024 13:15:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.132.182.106 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720790115; cv=none; b=Ywn+mTfZUiKpvuf9RoZIgYbMhCbLpvgSYqr4dnYMlJAwLL1DqRF5eTka9kPj9WEdetJR4RPxvGTQ0NT4EEu4aJ1WyJS+5nCXea7mSWn4yLaum2oU30qhngZXVSQN0N31NqJY40vrLPDgEd5Dq8jc4ldn9J6xFWlcoWWdqpkHkc0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720790115; c=relaxed/simple; bh=lXX3q5O+JoD6vOWXnXxdr4qkwAnTLEf/EX9xXfYsWxA=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=fmelRrbB3uah4Uzes/UaWjojmMPSh2iVDlQ4PSotU9ZkHvlsqEHpLdRWqbdTR3RRjx3SlnnSM3Uy+OGTfQwrCtaGqLkcruM9GyPEvqp6T8L93BX7TknJKqBmbyxXGdhD4mKc8ZOPAALV4LJ7Iz4UxVL7wQw3kQNYwnWr0P1TQhs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com; spf=pass smtp.mailfrom=foss.st.com; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b=6tixkjqE; arc=none smtp.client-ip=185.132.182.106 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=foss.st.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b="6tixkjqE" Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 46CCLxRd016528; Fri, 12 Jul 2024 15:14:44 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to; s=selector1; bh=IYjw4WDQmFzzHm+jIr0oVQ V4uqexoebGmhnt2Vpkcvw=; b=6tixkjqEGfk5Mq04x+OtA1ae2H6GFxqzJ+isH0 Zk+QnlIesI6P5FDWCdNxMlgrWZASGqWmrD78LmJvURAuk2lfg7jO2uwjrbmH/X78 TflubKRpbjYw8fvyUK2zmR3wUmmZORaLkZUhYuBmAd/QvSqd6qcYPBzdO8QzHv2e 1q97hxKnNWfVWpwOQGQQE+VI10jlg0C1jfNJDPMpDyURPLdxxXV49Gig11Iy1/n6 S1Hw42M2+W13lv1zaqkB03e6jtqxBVNPPW765SdEKykZR9UrJVRQ3XTExNoPlhwS kk0z5b8uZipvOClb61ALOHpLoLW4n89soJ6KPahsqwiBmi6w== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 406whj2egu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 12 Jul 2024 15:14:44 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id D635D40044; Fri, 12 Jul 2024 15:14:34 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node3.st.com [10.75.129.71]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 6C65820CB1B; Fri, 12 Jul 2024 15:13:51 +0200 (CEST) Received: from localhost (10.252.16.177) by SHFDAG1NODE3.st.com (10.75.129.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.37; Fri, 12 Jul 2024 15:13:51 +0200 From: Yannick Fertre To: Yannick Fertre , Raphael Gallais-Pou , Philippe Cornu , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Maxime Coquelin , Alexandre Torgue , , , , Subject: [PATCH] drm/stm: ltdc: reset plane transparency after plane disable Date: Fri, 12 Jul 2024 15:13:44 +0200 Message-ID: <20240712131344.98113-1-yannick.fertre@foss.st.com> X-Mailer: git-send-email 2.34.1 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 X-ClientProxiedBy: SHFCAS1NODE1.st.com (10.75.129.72) To SHFDAG1NODE3.st.com (10.75.129.71) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-12_09,2024-07-11_01,2024-05-17_01 Content-Type: text/plain; charset="utf-8" The plane's opacity should be reseted while the plane is disabled. It prevents from seeing a possible global or layer background color set earlier. Signed-off-by: Yannick Fertre --- drivers/gpu/drm/stm/ltdc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 5576fdae4962..cb4f08673a64 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -1514,6 +1514,9 @@ static void ltdc_plane_atomic_disable(struct drm_plan= e *plane, /* Disable layer */ regmap_write_bits(ldev->regmap, LTDC_L1CR + lofs, LXCR_LEN | LXCR_CLUTEN = | LXCR_HMEN, 0); =20 + /* Reset the layer transparency to hide any related background color */ + regmap_write_bits(ldev->regmap, LTDC_L1CACR + lofs, LXCACR_CONSTA, 0x00); + /* Commit shadow registers =3D update plane at next vblank */ if (ldev->caps.plane_reg_shadow) regmap_write_bits(ldev->regmap, LTDC_L1RCR + lofs, --=20 2.34.1