Hi Christian,

Le 28/09/2024 à 09:40, Christian Zigotzky a écrit :

On 28 September 2024 at 09:21am, Christian Zigotzky wrote:
 >
 >> On Sun, Sep 22, 2024 at 12:28 AM Christian Zigotzky
 >> [off-list ref] wrote:
 >>>
 >>> Hi All,
 >>>
 >>> The lastest Git kernel doesn't boot anymore after the latest DRM 
updates
 >>> (drm-next-2024-09-19). [1]
 >>>
 >>> I tested it with an AMD Radeon HD 6970 (Cayman XT) and with an AMD
 >>> Radeon HD 5870 (Cypress XT).
 >>>
 >>> I reverted the DRM updates and after that the kernel boots without any
 >>> problems.
 >>>
 >>> Please note: Due to a lack of time, I can't do a bisect.
 >>>
 >>> Please check the latest DRM updates.
------------
 >>
 >> Can you attach your dmesg output?  There was a regression in the dma
 >> subsystem what was fixed by this commit:
 >>
 >> commit b348b6d17fd1d5d89b86db602f02be
 >> a54a754bd8
 >> Author: Leon Romanovsky [off-list ref]
 >> Date:   Sun Sep 22 21:09:48 2024 +0300
 >>
 >>    dma-mapping: report unlimited DMA addressing in IOMMU DMA path
 >>
 >> Alex
 >>

------------
Hi Alex,

I tested the latest Git kernel on my FSL P5040 board today and it 
doesn't boot. Our FSL P5020 boards boot without any problems.

I connected my FSL P5040 board with a serial cable to my PC for getting 
error messages. Unfortunately there aren't any error messages after the 
loading of the uImage.

This means, that the dma-mapping patch doesn't solve the boot issue.

Please check the latest DRM updates.

Can you bisect the problem ?

Christophe