linux-kernel - Re: [PATCH v9 3/3] net: can: rockchip: add can for RK3576 Soc

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Message-ID: <3233894e-9409-4b74-a954-0b30064c3c8c@rock-chips.com>
Date: Fri, 14 Nov 2025 20:14:13 +0800
From: zhangqing <zhangqing@...k-chips.com>
To: Marc Kleine-Budde <mkl@...gutronix.de>
Cc: linux-arm-kernel@...ts.infradead.org, robh@...nel.org,
 conor+dt@...nel.org, heiko@...ech.de, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-can@...r.kernel.org,
 linux-rockchip@...ts.infradead.org, cl@...k-chips.com,
 kernel@...gutronix.de, krzk+dt@...nel.org, mailhol.vincent@...adoo.fr
Subject: Re: [PATCH v9 3/3] net: can: rockchip: add can for RK3576 Soc


在 2025/11/14 19:01, Marc Kleine-Budde 写道:
> On 14.11.2025 17:55:53, zhangqing wrote:
>>>> +/* The rk3576 CAN-FD */
>>>> +static const struct rkcanfd_devtype_data rkcan_devtype_data_rk3576 = {
>>>> +	.model = RKCAN_MODEL_RK3576,
>>>> +	.quirks = RKCANFD_QUIRK_CANFD_BROKEN,
>>> Is CAN-FD mode broken on the rk3576?
>>>
>>> Please test CAN-FD and please do the tests documented near the
>>> definition of RKCANFD_QUIRK_CANFD_BROKEN:
>>>
>>> | Tests on the rk3568v2 and rk3568v3 show that receiving certain
>>> | CAN-FD frames trigger an Error Interrupt.
>>> |
>>> | - Form Error in RX Arbitration Phase: TX_IDLE RX_STUFF_COUNT (0x0a010100) CMD=0 RX=0 TX=0
>>> |   Error-Warning=1 Bus-Off=0
>>> |   To reproduce:
>>> |   host:
>>> |     cansend can0 002##01f
>>> |   DUT:
>>> |     candump any,0:0,#FFFFFFFF -cexdHtA
>>> |
>>> | - Form Error in RX Arbitration Phase: TX_IDLE RX_CRC (0x0a010200) CMD=0 RX=0 TX=0
>>> |   Error-Warning=1 Bus-Off=0
>>> |   To reproduce:
>>> |   host:
>>> |     cansend can0 002##07217010000000000
>>> |   DUT:
>>> |     candump any,0:0,#FFFFFFFF -cexdHtA
>> There is no doubt about the other modifications above. They will be
>> corrected in version V10.
>>
>> CANFD requires authorization and is not supported by default.
> Can you explain what you mean by authorization? What do you mean by "not
> supported"?
For RK3576 SoC, the IC hardware design supports CANFD.
However, a license application is required before it can be used; 
otherwise, there will be legal risks.
>
>> After obtaining authorization, it can be used, so this place is not
>> considered broken.
>> What's the best way to handle this situation?
> regards,
> Marc
>
-- 
张晴
瑞芯微电子股份有限公司
Rockchip Electronics Co.,Ltd
地址：福建省福州市铜盘路软件大道89号软件园A区21号楼
Add:No.21 Building, A District, No.89 Software Boulevard Fuzhou, Fujian 350003, P.R.China
Tel:+86-0591-83991906-8601
邮编：350003
E-mail:elaine.zhang@...k-chips.com
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