netdev - Re: [PATCH net-next v4 08/11] stmmac: intel: configure SerDes according to the interface mode

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Date: Fri, 2 Feb 2024 11:06:01 +0800
From: Choong Yong Liang <yong.liang.choong@...ux.intel.com>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: Rajneesh Bhardwaj <irenic.rajneesh@...il.com>,
 David E Box <david.e.box@...ux.intel.com>,
 Hans de Goede <hdegoede@...hat.com>, Mark Gross <markgross@...nel.org>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Jose Abreu <Jose.Abreu@...opsys.com>, "David S . Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Richard Cochran <richardcochran@...il.com>,
 Russell King <linux@...linux.org.uk>, Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>,
 Jesper Dangaard Brouer <hawk@...nel.org>,
 John Fastabend <john.fastabend@...il.com>, Andrew Lunn <andrew@...n.ch>,
 Heiner Kallweit <hkallweit1@...il.com>,
 Philipp Zabel <p.zabel@...gutronix.de>, Andrew Halaney
 <ahalaney@...hat.com>, Simon Horman <simon.horman@...igine.com>,
 Serge Semin <fancer.lancer@...il.com>, Netdev <netdev@...r.kernel.org>,
 LKML <linux-kernel@...r.kernel.org>,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, platform-driver-x86@...r.kernel.org,
 linux-hwmon@...r.kernel.org, bpf@...r.kernel.org,
 Voon Wei Feng <weifeng.voon@...el.com>,
 Michael Sit Wei Hong <michael.wei.hong.sit@...el.com>,
 Lai Peter Jun Ann <jun.ann.lai@...el.com>,
 Abdul Rahim Faizal <faizal.abdul.rahim@...el.com>
Subject: Re: [PATCH net-next v4 08/11] stmmac: intel: configure SerDes
 according to the interface mode

On 31/1/2024 6:58 pm, Ilpo Järvinen wrote:
> On Mon, 29 Jan 2024, Choong Yong Liang wrote:
> 
>> From: "Tan, Tee Min" <tee.min.tan@...ux.intel.com>
>>
>> Intel platform will configure the SerDes through PMC api based on the
>> provided interface mode.
>>
>> This patch adds several new functions below:-
>> - intel_tsn_interface_is_available(): This new function reads FIA lane
>>    ownership registers and common lane registers through IPC commands
>>    to know which lane the mGbE port is assigned to.
>> - intel_config_serdes(): To configure the SerDes based on the assigned
>>    lane and latest interface mode, it sends IPC command to the PMC through
>>    PMC driver/API. The PMC acts as a proxy for R/W on behalf of the driver.
>> - intel_set_reg_access(): Set the register access to the available TSN
>>    interface.
>>
>> Signed-off-by: Tan, Tee Min <tee.min.tan@...ux.intel.com>
>> Signed-off-by: Choong Yong Liang <yong.liang.choong@...ux.intel.com>
>> ---
>>   drivers/net/ethernet/stmicro/stmmac/Kconfig   |   1 +
>>   .../net/ethernet/stmicro/stmmac/dwmac-intel.c | 113 +++++++++++++++++-
>>   .../net/ethernet/stmicro/stmmac/dwmac-intel.h |  75 ++++++++++++
>>   3 files changed, 188 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
>> index 85dcda51df05..be423fb2b46c 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
>> +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
>> @@ -273,6 +273,7 @@ config DWMAC_INTEL
>>   	default X86
>>   	depends on X86 && STMMAC_ETH && PCI
>>   	depends on COMMON_CLK
>> +	select INTEL_PMC_IPC
> 
> INTEL_PMC_IPC has depends on ACPI but selecting INTEL_PMC_IPC won't
> enforce it AFAIK.
> 
Hi Ilpo,

Thank you for pointing this out.
I will check on my side too.
Will fix it in the new patch series.