action: clang: set the name of checkout repo to zephyr #1
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Fixes isses with downstream forks, where repos names are not zephyr Signed-off-by: Maciej Perkowski <[email protected]>
PerMac
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Jan 3, 2023
This patch reworks how fragments are handled in the net_buf infrastructure. In particular, it removes the union around the node and frags members in the main net_buf structure. This is done so that both can be used at the same time, at a cost of 4 bytes per net_buf instance. This implies that the layout of net_buf instances changes whenever being inserted into a queue (fifo or lifo) or a linked list (slist). Until now, this is what happened when enqueueing a net_buf with frags in a queue or linked list: 1.1 Before enqueueing: +--------+ +--------+ +--------+ |#1 node|\ |#2 node|\ |#3 node|\ | | \ | | \ | | \ | frags |------| frags |------| frags |------NULL +--------+ +--------+ +--------+ net_buf #1 has 2 fragments, net_bufs #2 and #3. Both the node and frags pointers (they are the same, since they are unioned) point to the next fragment. 1.2 After enqueueing: +--------+ +--------+ +--------+ +--------+ +--------+ |q/slist |------|#1 node|------|#2 node|------|#3 node|------|q/slist | |node | | *flag | / | *flag | / | | / |node | | | | frags |/ | frags |/ | frags |/ | | +--------+ +--------+ +--------+ +--------+ +--------+ When enqueing a net_buf (in this case #1) that contains fragments, the current net_buf implementation actually enqueues all the fragments (in this case #2 and #3) as actual queue/slist items, since node and frags are one and the same in memory. This makes the enqueuing operation expensive and it makes it impossible to atomically dequeue. The `*flag` notation here means that the `flags` member has been set to `NET_BUF_FRAGS` in order to be able to reconstruct the frags pointers when dequeuing. After this patch, the layout changes considerably: 2.1 Before enqueueing: +--------+ +--------+ +--------+ |#1 node|--NULL |#2 node|--NULL |#3 node|--NULL | | | | | | | frags |-------| frags |-------| frags |------NULL +--------+ +--------+ +--------+ This is very similar to 1.1, except that now node and frags are different pointers, so node is just set to NULL. 2.2 After enqueueing: +--------+ +--------+ +--------+ |q/slist |-------|#1 node|-------|q/slist | |node | | | |node | | | | frags | | | +--------+ +--------+ +--------+ | +--------+ +--------+ | |#2 node|--NULL |#3 node|--NULL | | | | | +------------| frags |-------| frags |------NULL +--------+ +--------+ When enqueuing net_buf #1, now we only enqueue that very item, instead of enqueing the frags as well, since now node and frags are separate pointers. This simplifies the operation and makes it atomic. Resolves zephyrproject-rtos#52718. Signed-off-by: Carles Cufi <[email protected]>
PerMac
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May 27, 2025
Current code does not build on Cortex-M0, seems like it does not like subs: Error: instruction not supported in Thumb16 mode -- `subs r3,#1' Adding a unified assembler language declaration in the snippet seems to fix the problem, also add an M0+ board so this is tested in CI. Signed-off-by: Fabio Baltieri <[email protected]>
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Jul 16, 2025
Add possibility to perform crop on all pipes and compose (downscale) on pixel pipes (endpoint #1 and endpoint #2). Rework the code in order to move the downscale control from the set_fmt into the set_selection (compose). Signed-off-by: Alain Volmat <[email protected]>
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Sep 16, 2025
Add support for NV12/NV21, NV16/NV61 and YUV420/YVU420 (semi)planar formats which can be output by the main #1 pipe. Signed-off-by: Alain Volmat <[email protected]>
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Fixes isses with downstream forks, where repos names are not zephyr
Signed-off-by: Maciej Perkowski [email protected]