From nobody Fri Oct 3 11:27:52 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 1E1092DC34E for ; Tue, 2 Sep 2025 17:07:20 +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=1756832842; cv=none; b=mzV51VwQH0L87tyLeBejHoJ51zufzbl7gk26+paadnY1jMlEnPMBl3XxX6mo1y7OlmAd3s5uEbladJrXPtXtcRZT7ESmvVL4CMMhqrnmtRy4RG40FThUJoqJpU6epPVj2v8qDADjHdJyYtYMgRDOEbYngqzJ1qhEsDkHrJROXXM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756832842; c=relaxed/simple; bh=QPBBXvF4CU0wV1LurPOFo7Rxahye8bU0R5m3P6yDM8c=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=c03pjec67YcRWNmI0vSf3LrdWepieVRbShGST5ZpTNh8sPpTyqyv+0ZAUACMlWs1NwQbjV342zEvTmv4N0Q+TkUlrgcaqhPU21fMO2i5MvEbc+oNktmDogM/32ecZeCsbm9H9KvDb6m5rd2l3+d1fVHH3UFlsB5vd/pQYMbpRFc= 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=nfaH1FYX; 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="nfaH1FYX" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1756832839; bh=QPBBXvF4CU0wV1LurPOFo7Rxahye8bU0R5m3P6yDM8c=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=nfaH1FYXk8NE2nhYBWpJ4GjKfiCFL1R2a1VfYh0O5CXkelLtWCQJZr+csyO+pyFgv GiVe7Bn6OXoWqGRzoZiY3ZLdueArI4zcdVRUHtNpGRv5SOgzNkchztqHWoev+P2wgF OLvpUjl4LcfBSI7MrmehNPWxUVnaRnv1Iqitd9z0iJ7AeWXJMamgR0XIByjY618Nwy j2fvbO/mpc5rM7ozFc9O67qHAIMEDNDwbr0Uv9Z22OqTKWmKQsvr9lSXXpQl+SO4SJ GIHB4RskvpkOe0z/L0SqN0sJMzjGLwFqNYRjCPHYTHa4CptHwfuIVipwoDIquEvHM0 4AdEe9XBVWU8w== 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 2630F17E131D; Tue, 2 Sep 2025 19:07:19 +0200 (CEST) From: Cristian Ciocaltea Date: Tue, 02 Sep 2025 20:07:00 +0300 Subject: [PATCH 2/3] 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: <20250902-phy-hdptx-fixes-v1-2-e8d9ef9748d6@collabora.com> References: <20250902-phy-hdptx-fixes-v1-0-e8d9ef9748d6@collabora.com> In-Reply-To: <20250902-phy-hdptx-fixes-v1-0-e8d9ef9748d6@collabora.com> To: Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Dmitry Baryshkov , Algea Cao Cc: kernel@collabora.com, linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.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 aee03e8655f66d4b25de39bd2b2bf49d7a8b5b86..8ba9b53c2309b22a496574b7731= 377049f50068f 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 2.51.0