From nobody Tue Oct 7 16:38:16 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 257642206A9 for ; Tue, 8 Jul 2025 19:37:07 +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=1752003430; cv=none; b=Egj07vXP/J1zea5Z9jGivGe4nsdTG57/oiOoC/N7kwO566xWX2uDPQwKUSLsHkWT9jtj2NTzwCzoKQ9J7bVpcu2bTc+X2/xAqoDtH8Sk4MpOET6saC5GTsqFeijSr7wpi7DVWKa4Bb2oe+rokXi2+J1BBWXJ2Ge+rW1l4LPLVN4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752003430; c=relaxed/simple; bh=eDGUcwKrU4R+EKuiNGkdRoVaHHemXEEuI86mVlofnQg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=eROKrkbOKen0lKQlLoksQGl35Ca3v1UZ+jCgFYieKClDt0B0fRJXF6FRezKl/jYXLC+dlAGUNTY/U+VUaSM4Ia34U/NZ7wEgBMuxgQvm1GVU4ZOXK+D8NoAiVzfuGJgLRCcSqr6rG/VsZb+rYLKsIpP1LhDDrZ5+F5ZXhKZDEm8= 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=IlSlFl4m; 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="IlSlFl4m" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1752003426; bh=eDGUcwKrU4R+EKuiNGkdRoVaHHemXEEuI86mVlofnQg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=IlSlFl4m+bHGeJM0lEvZ2p0tsnSbn5GVGXzO8pOp9x6kOB0M8DVRf1Db6GBuKl1cd /V+bzm0MgJxJM3e6t4pl02v/Qq3DxhEDBjJVYIgYWjrDUyv9K5wqmDeHdy5juAFBm9 QDGJlDvVIUd6yedmVPbSVLpadK6ALoe85u5YBzbxww5S3pV6kIz/eF9ZXagSIekXGa LQhf87CR5piSYs1V8bbD9vVdXNp2CtAUGXxS8sB9d0u3m/y2iFk/eUCTqsjjzgLIX7 9psYQJhH0XT9f0KkP9rp68Fyd/HwV/7o2WP75hXz6SBEuQZwWOnh48Y3NaKS7e58Ul hL9j/yDCM1KyA== Received: from localhost (unknown [212.93.144.165]) (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 3F71B17E0CF8; Tue, 8 Jul 2025 21:37:06 +0200 (CEST) From: Cristian Ciocaltea Date: Tue, 08 Jul 2025 22:35:43 +0300 Subject: [PATCH 02/12] 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: <20250708-phy-hdptx-frl-v1-2-cfe096e224f4@collabora.com> References: <20250708-phy-hdptx-frl-v1-0-cfe096e224f4@collabora.com> In-Reply-To: <20250708-phy-hdptx-frl-v1-0-cfe096e224f4@collabora.com> To: Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Algea Cao 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 79db57ee90d1487b51f4ddadde870a275dd7b17b..d7d6c1ebacc890e257c1550210e= e144387ef7183 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