diff mbox series

[can-next,v2,08/20] can: rockchip_canfd: add notes about known issues

Message ID 20240731-rockchip-canfd-v2-8-d9604c5b4be8@pengutronix.de (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series an: rockchip_canfd: add support for CAN-FD IP core found on Rockchip RK3568 | expand

Checks

Context Check Description
netdev/series_format fail Series longer than 15 patches
netdev/tree_selection success Guessed tree name to be net-next, async
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 42 this patch: 42
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 11 of 11 maintainers
netdev/build_clang success Errors and warnings before: 43 this patch: 43
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 43 this patch: 43
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 26 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Marc Kleine-Budde July 31, 2024, 9:37 a.m. UTC 
Even the rk3568v3 has some known issues. Document them together with a
reproducer.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/rockchip/rockchip_canfd.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
diff mbox series

Patch

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,