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Message-Id: <20240830-rockchip-canfd-v3-8-d426266453fa@pengutronix.de>
Date: Fri, 30 Aug 2024 21:26:05 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: kernel@...gutronix.de, Vincent Mailhol <mailhol.vincent@...adoo.fr>,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
Philipp Zabel <p.zabel@...gutronix.de>,
Elaine Zhang <zhangqing@...k-chips.com>,
David Jander <david.jander@...tonic.nl>
Cc: Simon Horman <horms@...nel.org>, linux-can@...r.kernel.org,
netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
linux-kernel@...r.kernel.org, Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH can-next v3 08/20] can: rockchip_canfd: add notes about
known issues
Even the rk3568v3 has some known issues. Document them together with a
reproducer.
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
drivers/net/can/rockchip/rockchip_canfd.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/net/can/rockchip/rockchip_canfd.h b/drivers/net/can/rockchip/rockchip_canfd.h
index 9b446331fbd0..3dafb5e68dc5 100644
--- a/drivers/net/can/rockchip/rockchip_canfd.h
+++ b/drivers/net/can/rockchip/rockchip_canfd.h
@@ -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,
--
2.45.2
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