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can: rockchip_canfd: add notes about known issues

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Even the rk3568v3 has some known issues. Document them together with a
reproducer.

Tested-by: Alibek Omarov <a1ba.omarov@gmail.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20240904-rockchip-canfd-v5-8-8ae22bcb27cc@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Marc Kleine-Budde 2024-07-28 14:53:27 +02:00
parent c158f22fe5
commit fb999a5f99
1 changed files with 20 additions and 0 deletions
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20
drivers/net/can/rockchip/rockchip_canfd.h
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@ -370,6 +370,26 @@
*/
#define RKCANFD_QUIRK_CANFD_BROKEN BIT(12)
/* known issues with rk3568v3:
*
* - Overload situation during high bus load
* To reproduce:
* host:
* # add a 2nd CAN adapter to the CAN bus
* cangen can0 -I 1 -Li -Di -p10 -g 0.3
* cansequence -rve
* DUT:
* cangen can0 -I2 -L1 -Di -p10 -c10 -g 1 -e
* cansequence -rv -i 1
*
* - TX starvation after repeated Bus-Off
* To reproduce:
* host:
* sleep 3 && cangen can0 -I2 -Li -Di -p10 -g 0.0
* DUT:
* cangen can0 -I2 -Li -Di -p10 -g 0.05
*/
enum rkcanfd_model {
RKCANFD_MODEL_RK3568V2 = 0x35682,
RKCANFD_MODEL_RK3568V3 = 0x35683,