linux-kernel - Re: [PATCH v5 3/3] PCI: artpec6: Configure FTS with dwc helper function

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Message-ID: <913f3aa2-708e-ceee-217a-5a0a1b1dfca4@linux.intel.com>
Date:   Mon, 11 Nov 2019 16:10:24 +0800
From:   Dilip Kota <eswara.kota@...ux.intel.com>
To:     Andrew Murray <andrew.murray@....com>,
        Jingoo Han <jingoohan1@...il.com>
Cc:     "gustavo.pimentel@...opsys.com" <gustavo.pimentel@...opsys.com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "helgaas@...nel.org" <helgaas@...nel.org>,
        "robh@...nel.org" <robh@...nel.org>,
        "martin.blumenstingl@...glemail.com" 
        <martin.blumenstingl@...glemail.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "andriy.shevchenko@...el.com" <andriy.shevchenko@...el.com>,
        "cheol.yong.kim@...el.com" <cheol.yong.kim@...el.com>,
        "chuanhua.lei@...ux.intel.com" <chuanhua.lei@...ux.intel.com>,
        "qi-ming.wu@...el.com" <qi-ming.wu@...el.com>
Subject: Re: [PATCH v5 3/3] PCI: artpec6: Configure FTS with dwc helper
 function


On 11/8/2019 6:43 PM, Andrew Murray wrote:
> On Thu, Nov 07, 2019 at 09:03:46PM +0000, Jingoo Han wrote:
>> On 11/5/19, 10:44 PM, Dilip Kota wrote:
>>> Utilize DesugnWare helper functions to configure Fast Training
>> Nitpicking: Fix typo (DesugnWare --> DesignWare)
>>
>> If possible, how about the following?
>> Utilize DesignWare --> Use DesignWare
>>
>> Best regards,
>> Jingoo Han
>>
>>> Sequence. Drop the respective code in the driver.
>>>
>>> Signed-off-by: Dilip Kota <eswara.kota@...ux.intel.com>
> With the changes suggested in this thread, you can add:
>
> Reviewed-by: Andrew Murray <andrew.murray@....com>
Sure.

Thanks a lot for reviewing patch and giving inputs,

Regards,
Dilip

>
>>> ---
>>>   drivers/pci/controller/dwc/pcie-artpec6.c | 8 +-------
>>>   1 file changed, 1 insertion(+), 7 deletions(-)
>>>
>>> diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
>>> index d00252bd8fae..02d93b8c7942 100644
>>> --- a/drivers/pci/controller/dwc/pcie-artpec6.c
>>> +++ b/drivers/pci/controller/dwc/pcie-artpec6.c
>>> @@ -51,9 +51,6 @@ static const struct of_device_id artpec6_pcie_of_match[];
>>>   #define ACK_N_FTS_MASK			GENMASK(15, 8)
>>>   #define ACK_N_FTS(x)			(((x) << 8) & ACK_N_FTS_MASK)
>>>   
>>> -#define FAST_TRAINING_SEQ_MASK		GENMASK(7, 0)
>>> -#define FAST_TRAINING_SEQ(x)		(((x) << 0) & FAST_TRAINING_SEQ_MASK)
>>> -
>>>   /* ARTPEC-6 specific registers */
>>>   #define PCIECFG				0x18
>>>   #define  PCIECFG_DBG_OEN		BIT(24)
>>> @@ -313,10 +310,7 @@ static void artpec6_pcie_set_nfts(struct artpec6_pcie *artpec6_pcie)
>>>   	 * Set the Number of Fast Training Sequences that the core
>>>   	 * advertises as its N_FTS during Gen2 or Gen3 link training.
>>>   	 */
>>> -	val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
>>> -	val &= ~FAST_TRAINING_SEQ_MASK;
>>> -	val |= FAST_TRAINING_SEQ(180);
>>> -	dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
>>> +	dw_pcie_link_set_n_fts(pci, 180);
>>>   }
>>>
>>>   static void artpec6_pcie_assert_core_reset(struct artpec6_pcie *artpec6_pcie)
>>> -- 
>>> 2.11.0