[PATCH] rockchip: puma-rk3399: increase Ethernet PHY timeout to 30s

[PATCH] rockchip: puma-rk3399: increase Ethernet PHY timeout to 30s

[Quentin Schulz]

From: Quentin Schulz <quentin.schulz@cherry.de>

On Puma v2.1 with a KSZ9031, the Ethernet PHY often doesn't detect the
link in the 4-second default timeout.

After some boot-loop test for about a thousand boots, 70% were below
10s, 90% below 15s and 100% below 30s. Let's play it safe and make it
30s so that hopefully all links that should be detected are.

Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
---
 include/configs/puma_rk3399.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/configs/puma_rk3399.h b/include/configs/puma_rk3399.h
index 969acc89b93..2056a5eb2e4 100644
--- a/include/configs/puma_rk3399.h
+++ b/include/configs/puma_rk3399.h
@@ -6,6 +6,9 @@
 #ifndef __PUMA_RK3399_H
 #define __PUMA_RK3399_H
 
+/* Highly variable timeout in getting a link on Puma v2.1 with KSZ9031 */
+#define PHY_ANEG_TIMEOUT                30000
+
 #include <configs/rk3399_common.h>
 
 #endif

---
base-commit: fe2ce09a0753634543c32cafe85eb87a625f76ca
change-id: 20240619-puma-eth-timeout-41be9c243ed7

Best regards,
-- 
Quentin Schulz <quentin.schulz@cherry.de>

Re: [PATCH] rockchip: puma-rk3399: increase Ethernet PHY timeout to 30s

[Tom Rini]

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On Wed, Jun 19, 2024 at 11:55:52AM +0200, Quentin Schulz wrote:

> From: Quentin Schulz <quentin.schulz@cherry.de>
> 
> On Puma v2.1 with a KSZ9031, the Ethernet PHY often doesn't detect the
> link in the 4-second default timeout.
> 
> After some boot-loop test for about a thousand boots, 70% were below
> 10s, 90% below 15s and 100% below 30s. Let's play it safe and make it
> 30s so that hopefully all links that should be detected are.
> 
> Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
> ---
>  include/configs/puma_rk3399.h | 3 +++
>  1 file changed, 3 insertions(+)

Please rebase on -next where this is now in Kconfig.

-- 
Tom

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Re: [PATCH] rockchip: puma-rk3399: increase Ethernet PHY timeout to 30s

[Quentin Schulz]

Hi Tom,

On 6/19/24 5:22 PM, Tom Rini wrote:
> On Wed, Jun 19, 2024 at 11:55:52AM +0200, Quentin Schulz wrote:
> 
>> From: Quentin Schulz <quentin.schulz@cherry.de>
>>
>> On Puma v2.1 with a KSZ9031, the Ethernet PHY often doesn't detect the
>> link in the 4-second default timeout.
>>
>> After some boot-loop test for about a thousand boots, 70% were below
>> 10s, 90% below 15s and 100% below 30s. Let's play it safe and make it
>> 30s so that hopefully all links that should be detected are.
>>
>> Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
>> ---
>>   include/configs/puma_rk3399.h | 3 +++
>>   1 file changed, 3 insertions(+)
> 
> Please rebase on -next where this is now in Kconfig.
> 

It's technically a bug fix, but well... we've had it forever so one more 
release is probably not gonna hurt us :) Thanks for the heads up.

BTW, I believe 
https://source.denx.de/u-boot/u-boot/-/commit/40f5046c221a7b2719c49b51acefe12914b213e5?page=2 
made it through this net and should be migrated to defconfig as well in 
next? SO adding Michal in Cc here to trigger something if required :)

Cheers,
Quentin