From nobody Sun Oct 5 12:49:45 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 0EB9225A354 for ; Tue, 5 Aug 2025 11:56:50 +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=1754395012; cv=none; b=iKtUfuhN0oVPWTA3y5Ls7X6HdE5rrQv4NrNdaprU7rW5aBBRfWxsptvx6znmNxFKM15bXX7DgnPiIk/Wpzto4doBkxq84ugWi+XIBNvRoPRz6QEPai4kjQTCqEHpkwpLuDppmnj+o1sjABrnxQX0+b2LrBw1i2EO+29y0Irp3hs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754395012; c=relaxed/simple; bh=ODQdQxzpjiRP/ZxsLGvsELfQsjCQCMqj3dxlykfHx7s=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=N9Tw+xuBZ98VW9oJTAGC9yVX3muidX9R2MM4KwCgRz+fVTLzYkQevts4YT28fa0tABTA7ucvmogXlGhy/6p6UrGVr0d/jvGCAl0K/UHkAjtNiLdnqnnGrwnj7ZSb0dkeIhswYKHkl5sBWgUZoA39hckVR0XOs+WsxljAgIw88lk= 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=iwVefxmX; 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="iwVefxmX" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1754395009; bh=ODQdQxzpjiRP/ZxsLGvsELfQsjCQCMqj3dxlykfHx7s=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=iwVefxmXl7xmz+Tto8HThYXzyAuHecfeLQxF1SPdFvkPzVOVoZTFMD4Rnq32/6Y6k WEX1KxbY/EgwzjTlQjcjyJH68dMM1WLyXs6U1l5soTkYxBb9ias/qw/1UWhSRT0He8 iDo82mwjtzzb9ToXfntMA2DOmbUoxuuWfQ0yrBanhngAO+B3fL11XATmGmE9wi7PHz /tSzTnuZ7H5EnSLsDUqQDxlbsBfOJPMAprVqga+A+1UXDIgZGFGndPoi3ptW6oWYqh BcezeZRaBboqjXsLXttkWo0y6bRnvYDen+TU34jE63IalBlQTRSQLPGWhted2n2juo ows8iHUxLX3oQ== 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 25FF417E0C8C; Tue, 5 Aug 2025 13:56:49 +0200 (CEST) From: Cristian Ciocaltea Date: Tue, 05 Aug 2025 14:56:45 +0300 Subject: [PATCH v2 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: <20250805-phy-hdptx-frl-v2-3-d118bd4b6e0b@collabora.com> References: <20250805-phy-hdptx-frl-v2-0-d118bd4b6e0b@collabora.com> In-Reply-To: <20250805-phy-hdptx-frl-v2-0-d118bd4b6e0b@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 2.50.0