From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 E72A12356BB for ; Wed, 2 Apr 2025 11:42:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743594141; cv=none; b=Dla6lLn/vYC5lf8BdLZKdB3n4Wop/5/1mxRlcYqqDfsFWeSL/pgD8rUDAIyVVCPCPec+EHE6Tsa+PtaCTglbbG2+ohznOmSgVykSYlW5Heq1/v/0gaY0CjGfOHeg8D0Xjz+JdBheRp9iyU5Bi6GCysz/tut5Fnodo7RMM62KxQE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743594141; c=relaxed/simple; bh=br6xgjpyF0FbbDpugM+ibdJL1SvA1hVnKm/fceQ7q4k=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Fh5FvQXgKaEsQ2SuZTSw55Bhp/kYu4+XfJSufD6QBn7g+3O4Z+JtJBjc+9pTHic3jlkFy30sQOjaLO7i1SsYeoaOheA8lOrBDiFCiVCXlWg+8drXGXXpb31ZadHV1Eclg5PUXA/taejEfURE5EHecW7xay5c5mrK+8/GpZC/b90= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=Rk44w3Cx; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="Rk44w3Cx" Received: from [192.168.88.20] (91-158-153-178.elisa-laajakaista.fi [91.158.153.178]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 8D6336A2; Wed, 2 Apr 2025 13:40:24 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1743594025; bh=br6xgjpyF0FbbDpugM+ibdJL1SvA1hVnKm/fceQ7q4k=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Rk44w3Cxmi/ojwfgpzH+kURiqrJU8vCttpX/VK3vTY9gnS0I7VZCKj4+JBl6bDmHv tIOoXwXOnDSRitmeGUm8eILwsjNeC+M2l8HWmUPHIp/HhrAp7Y0ZqiLvJsdb0s9tg/ yUm748WA5c3fETWPvqsKiLAgVt5T9P8WrC0AdutM= Message-ID: <5465d2dd-d81a-4e33-b76f-cbbd3386c725@ideasonboard.com> Date: Wed, 2 Apr 2025 14:42:14 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] phy: cadence: cdns-dphy: Update calibration wait time for startup state machine To: Devarsh Thakkar Cc: sakari.ailus@linux.intel.com, u.kleine-koenig@baylibre.com, vigneshr@ti.com, aradhya.bhatia@linux.dev, s-jain1@ti.com, r-donadkar@ti.com, vkoul@kernel.org, kishon@kernel.org, mripard@kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org References: <20250326152320.3835249-1-devarsht@ti.com> <20250326152320.3835249-3-devarsht@ti.com> Content-Language: en-US From: Tomi Valkeinen Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi, On 26/03/2025 17:23, Devarsh Thakkar wrote: > Use system characterized reset value specified in TRM [1] to program > calibration wait time which defines number of cycles to wait for after > startup state machine is in bandgap enable state. > > This fixes PLL lock timeout error faced while using RPi DSI Panel on TI's > AM62L and J721E SoC [2]. > > [1] AM62P TRM (Section ): > https://www.ti.com/lit/pdf/spruj83 > > [2]: > Link: https://gist.github.com/devarsht/89e4830e886774fcd50aa6e29cce3a79 > > Cc: stable@vger.kernel.org > Fixes: 7a343c8bf4b5 ("phy: Add Cadence D-PHY support") > Signed-off-by: Devarsh Thakkar > --- > V2: Introduced this as as separate patch > > drivers/phy/cadence/cdns-dphy.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/phy/cadence/cdns-dphy.c b/drivers/phy/cadence/cdns-dphy.c > index c4de9e4d3e93..11fbffe5aafd 100644 > --- a/drivers/phy/cadence/cdns-dphy.c > +++ b/drivers/phy/cadence/cdns-dphy.c > @@ -30,6 +30,7 @@ > > #define DPHY_CMN_SSM DPHY_PMA_CMN(0x20) > #define DPHY_CMN_SSM_EN BIT(0) > +#define DPHY_CMN_SSM_CAL_WAIT_TIME GENMASK(8, 1) > #define DPHY_CMN_TX_MODE_EN BIT(9) > > #define DPHY_CMN_PWM DPHY_PMA_CMN(0x40) > @@ -405,6 +406,8 @@ static int cdns_dphy_configure(struct phy *phy, union phy_configure_opts *opts) > reg = FIELD_PREP(DPHY_BAND_CFG_LEFT_BAND, band_ctrl) | > FIELD_PREP(DPHY_BAND_CFG_RIGHT_BAND, band_ctrl); > writel(reg, dphy->regs + DPHY_BAND_CFG); > + writel(FIELD_PREP(DPHY_CMN_SSM_CAL_WAIT_TIME, 0x14) | DPHY_CMN_SSM_EN | DPHY_CMN_TX_MODE_EN, > + dphy->regs + DPHY_CMN_SSM); This sounds like a TI specific characterized value, but the function here is a generic one. Also, is the value same for all TI SoCs? Or is it per-soc? Tomi