From nobody Sat Oct 4 09:40:48 2025 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 13AB8272E48 for ; Mon, 18 Aug 2025 18:59:23 +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=1755543565; cv=none; b=Bvk7zwhKt5ct6CcBzP2zvuvKtRq2VVDxQn9lk8rOQkfeprNqT9wa+RMu62epupqF5rIYqezGMVQUuAatcWbhNRhJ0R5wulc2vsQQabbZq0Z8V/sH75MukA7CfNhjB1qLXAZdGFgsevMPykgbtXBqDGCZrxoF3kBVtBgg40r63yU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755543565; c=relaxed/simple; bh=CZzIqLl7txM9v2LMT0cPyUUYe+agcYOKK/tHV7hSgl0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=IZNoi7wf5g1hkMP+aYBzaBbi2uq4zzOjyy9OK2sFdwYbBRnsAcAC0H7iXkMYjwPjXXb2QmjiSAYKR6SXJvRvo8bO32dmJYEjY+vS0OLR87N5ub6uO891XxhBWOF8+Zu7vcEQkN2pkGoi9ZTnS5q12PkCmP3I/T8xeQwN5OBsJ9s= 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=A+2qamSl; 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="A+2qamSl" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1755543562; bh=CZzIqLl7txM9v2LMT0cPyUUYe+agcYOKK/tHV7hSgl0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=A+2qamSlFvOOkTXKsmlDcOoY9MndK8kRVJlezQlz82QSjs1nMGEh8dch2/0Vv3wRz Od5T2+NyapQKKgUTbDW2oALczAM6n9In4CxitKuVMZy1ZlOaUy94SDDqPRIND7itJW N1i9Nd8Pe166TFaRvodYrhMn0I/CoSg58i61ZFMuQ8G2oi31raqw1HPusv3sSvDaIq BuwTz1pY32DeSQ/yi9tm/a/WhpRQPUThRNHhVMF4nE6o9zIIlW6zJd1dJz2v4T8SGf nkQTG3qkJBmQM0CUf4DMavNuPHgDY74GiW2sTozyfxADl6HYoaL6GbwN5TznclfDFz lHmw5b9K+F10Q== Received: from localhost (unknown [82.79.138.60]) (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 413C717E1319; Mon, 18 Aug 2025 20:59:22 +0200 (CEST) From: Cristian Ciocaltea Date: Mon, 18 Aug 2025 21:59:03 +0300 Subject: [PATCH v3 03/14] phy: rockchip: samsung-hdptx: Reduce ROPLL loop bandwidth 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: <20250818-phy-hdptx-frl-v3-3-c79997d8bb2b@collabora.com> References: <20250818-phy-hdptx-frl-v3-0-c79997d8bb2b@collabora.com> In-Reply-To: <20250818-phy-hdptx-frl-v3-0-c79997d8bb2b@collabora.com> To: Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Algea Cao , Dmitry Baryshkov Cc: kernel@collabora.com, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org X-Mailer: b4 0.14.2 Due to its relatively low frequency, a noise stemming from the 24MHz PLL reference clock may traverse the low-pass loop filter of ROPLL, which could potentially generate some HDMI flash artifacts. Reduce ROPLL loop bandwidth in an attempt to mitigate the problem. Fixes: 553be2830c5f ("phy: rockchip: Add Samsung HDMI/eDP Combo PHY driver") Co-developed-by: Algea Cao Signed-off-by: Algea Cao Signed-off-by: Cristian Ciocaltea --- drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c b/drivers/ph= y/rockchip/phy-rockchip-samsung-hdptx.c index 8adf6e84fc0b762a7a6042459601c3271572de8e..9751f7ad00f4faf7041dbf4339f= 633e09f97b107 100644 --- a/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c +++ b/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c @@ -500,9 +500,7 @@ static const struct reg_sequence rk_hdtpx_common_cmn_in= it_seq[] =3D { REG_SEQ0(CMN_REG(0043), 0x00), REG_SEQ0(CMN_REG(0044), 0x46), REG_SEQ0(CMN_REG(0045), 0x24), - REG_SEQ0(CMN_REG(0046), 0xff), REG_SEQ0(CMN_REG(0047), 0x00), - REG_SEQ0(CMN_REG(0048), 0x44), REG_SEQ0(CMN_REG(0049), 0xfa), REG_SEQ0(CMN_REG(004a), 0x08), REG_SEQ0(CMN_REG(004b), 0x00), @@ -575,6 +573,8 @@ static const struct reg_sequence rk_hdtpx_tmds_cmn_init= _seq[] =3D { REG_SEQ0(CMN_REG(0034), 0x00), REG_SEQ0(CMN_REG(003d), 0x40), REG_SEQ0(CMN_REG(0042), 0x78), + REG_SEQ0(CMN_REG(0046), 0xdd), + REG_SEQ0(CMN_REG(0048), 0x11), REG_SEQ0(CMN_REG(004e), 0x34), REG_SEQ0(CMN_REG(005c), 0x25), REG_SEQ0(CMN_REG(005e), 0x4f), --=20 2.50.1