PhilE wrote: ↑

Wed Apr 09, 2025 7:44 am

The MIP is a dedicated MSI(-X) target present in the 2712. It is hardwired to a number of GIC interrupts, and thus gives a faster interrupt response than you get with the Root Complex's built-in MSI target which requires a chained interrupt handler.

fpvr wrote: ↑

Fri Apr 11, 2025 10:09 am

I am having a problem with the new kernel. I am trying to build and install decklink drivers on my Pi5 but this fails because the linux headers for kernel 6.12.22-v8-16k+ are not available.

commit 0cfea60966e4b1239d20bebf02258295e189e82a
Author: Ming Yen Hsieh <[email protected]>
Date: Tue Feb 18 11:33:42 2025 +0800

wifi: mt76: mt7921: fix kernel panic due to null pointer dereference

commit adc3fd2a2277b7cc0b61692463771bf9bd298036 upstream.

Address a kernel panic caused by a null pointer dereference in the
`mt792x_rx_get_wcid` function. The issue arises because the `deflink` structure
is not properly initialized with the `sta` context. This patch ensures that the
`deflink` structure is correctly linked to the `sta` context, preventing the
null pointer dereference.

JinShil wrote: ↑

Tue Apr 22, 2025 8:18 am

After updating to 6.12 via rpi-update, /sys/kernel/debug/dri/0/gpu_usage disappears, so it is no longer possible to monitor GPU usage.

Edit:
... at least on my CM4. I haven't yet tested other devices.

Edit:
According to https://github.com/raspberrypi/linux/issues/6517, the stats have moved to a new location, but I still can't find them.

Edit:
According to https://github.com/raspberrypi-ui/wfplu ... 29d571e746 wfplug-gpu was updated to read stats from /sys/devices/platform/axi/1002000000.v3d/gpu_stats, but that file also doesn't exist, so it seems wfplug-gpu will need another update.

6by9 wrote: ↑

Tue Apr 22, 2025 11:03 am

JinShil wrote: ↑

Tue Apr 22, 2025 8:18 am

After updating to 6.12 via rpi-update, /sys/kernel/debug/dri/0/gpu_usage disappears, so it is no longer possible to monitor GPU usage.

Edit:
... at least on my CM4. I haven't yet tested other devices.

Edit:
According to https://github.com/raspberrypi/linux/issues/6517, the stats have moved to a new location, but I still can't find them.

Edit:
According to https://github.com/raspberrypi-ui/wfplu ... 29d571e746 wfplug-gpu was updated to read stats from /sys/devices/platform/axi/1002000000.v3d/gpu_stats, but that file also doesn't exist, so it seems wfplug-gpu will need another update.

Pi4/CM4 is /sys/devices/platform/v3dbus/fec00000.v3d/gpu_stats. I'll give the relevant person a ping.

catubc wrote: ↑

Thu Jun 19, 2025 9:43 am

If anyone is still monitoring this post, it seems 6.12.25 breaks ptp4l again.

I posted here: viewtopic.php?p=2321622#p2321622

Any advice is much appreciated.