From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 2202A36404E; Tue, 16 Dec 2025 12:25:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765887916; cv=none; b=rAUeKwiofKUJP6K1soN/Jhcbfe+7Hfj4RlxQva6KPL0JfXZB9Qs0rtOSCFCzQjr14MwH4tVdENVdF3NDDdh3+pFgaso36brxmVpLtAHBOfmAG+KGfrTGU4TPZb4kOme7ar6PNvRquxmQXi0eGAh8M25swAqdXmjmajMZIXsAYUU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765887916; c=relaxed/simple; bh=cgR7hawmkhRVDYeen3hZcZZLiKZ3makGR5cfzAxXUzI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CX8zoRIb2J4wJIvoyDs/abvW8AFOuibXcv9aIQ7mSCh6lhAv18ap0JPW4YooqYatVu0PsjrhP7aB2ZxtSxa/oQ8X6J0Ez/0GUT6asbGKNTLC3dpqdbWd5jazuykVwUdTQlcB275l0usni5OBfWmGYSWOBp0KDUnsljwy2avhuZs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Ch0wk3VF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Ch0wk3VF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1B41AC4CEF1; Tue, 16 Dec 2025 12:25:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1765887915; bh=cgR7hawmkhRVDYeen3hZcZZLiKZ3makGR5cfzAxXUzI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ch0wk3VFQpXejar30Odg+H1qsR/mS6rjAXEdOLZMilt2u9J6YptcO5TqPPW9ZzP5L lBOwuKWn774ZEYszaUd1MRkWtE+tBmQMVrIqIHiJj8gOUodRZHRY/cfUBYRmmRdSSG AyYWajdi6w8VHt7TCm3iYSYhq6Pm5Sit98PP5ETg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Algea Cao , Cristian Ciocaltea , Neil Armstrong , Vinod Koul , Sasha Levin Subject: [PATCH 6.18 349/614] phy: rockchip: samsung-hdptx: Reduce ROPLL loop bandwidth Date: Tue, 16 Dec 2025 12:11:56 +0100 Message-ID: <20251216111414.007680971@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251216111401.280873349@linuxfoundation.org> References: <20251216111401.280873349@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cristian Ciocaltea [ Upstream commit 8daaced9f5eeb4a2c8ca08b0a8286b6a498a8387 ] 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 Reviewed-by: Neil Armstrong Link: https://patch.msgid.link/20251028-phy-hdptx-fixes-v1-2-ecc642a59d94@collabora.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- 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/phy/rockchip/phy-rockchip-samsung-hdptx.c index aee03e8655f66..8ba9b53c2309b 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_init_seq[] = { 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[] = { 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), -- 2.51.0