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 48921342507; Tue, 16 Dec 2025 11:27:23 +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=1765884443; cv=none; b=Jv/Mq9W3nWg7kgWvrAtcLgrHVvm5B6PLHKGYbBmM61h4hcNI8m9Qh2pKYEeClnR0cDnmtakc/hAn13n/gTSIhQqd856cA55Qbgylv8Cq/jMsOEXGk3U119U/zDLiNW4+4B9nxvIpT4m3uZshkLDUHuf6yGLx6CYO6O2TUBnPBSY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765884443; c=relaxed/simple; bh=yZ4BDz8CNnqNt1QWU3nTeQviA4dP0lzS7Z2ZXmVZVsI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XWSv62iUVUQBcpXj/Y8U3OmaQBGfia71HwTRr0JmVlHOXBRRIx8eLktIaJNEy4K2jCOAMan/vSfgL9qcXuhVrdCRKq+arSdFdzMvmo+uj7PyTySEFt0+HrTSA5a36WQz5oolZa2K8+BwpNCGRIGTY85RKMdXHyCGejxRX+iEBgU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ZUlqUDC0; 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="ZUlqUDC0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A9EFFC4CEF1; Tue, 16 Dec 2025 11:27:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1765884443; bh=yZ4BDz8CNnqNt1QWU3nTeQviA4dP0lzS7Z2ZXmVZVsI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZUlqUDC0UqeDGSqlhNhQqpGp5BUi9dzbC4TtIv2eTXxPC72u6jp44PeOepOnwqZye TOHPEi6NNypBEBxDC37RBlBtS7HK/m2DUnt+BtJ7NACyyI87Tt08qR6qMseEhnuDCt BIeiLegGvPI2dkFGyj1CkVUo71qGuLB3Iosv23b0= 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 6.12 195/354] phy: rockchip: samsung-hdptx: Reduce ROPLL loop bandwidth Date: Tue, 16 Dec 2025 12:12:42 +0100 Message-ID: <20251216111327.976708927@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251216111320.896758933@linuxfoundation.org> References: <20251216111320.896758933@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-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 5547f8df8e717..d287e818fb03c 100644 --- a/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c +++ b/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c @@ -385,9 +385,7 @@ 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), @@ -460,6 +458,8 @@ 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