pieeprom-2026-08-04: 2712: Avoid slow calls every mbox message (latest) - #866
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* arm_mbox: Avoid slow calls every mbox message They are only meant to be called every 100ms (arm_loader_update_throttled_status) or 20ms (power_monitor_execute) but are called once per mbox message. * arm_2712: Avoid waiting for an already consumed latch rtos_latch_try() acquires the latch if a message is already waiting (the IRQ handler released it). * arm_dt: Store detected but unknown display ID in device tree For DSI displays where the ID provided by the MCU is unknown, store the value read in device tree so that userspace can do something. * arm_loader_dvfs: Make enable request on unset clock quieter The current kernel does trigger this path during initialisation. Pull in RP1 firmware at d6df137696bdb672690a9f5117b332d2dc5bae47 * camera_subsystem: Account for CSS_CMD_DELAY with the read cache Store the elapsed time of the I2C read in the cache so that we correctly account for any CSS_CMD_DELAY commands in the read sequence and ensure they are correcly handled if cached. * camera_subsystem: Cache the I2C transactions for efficiency where possible Some sensors share the same I2C address and id register locations, so we might save a few ms by caching i2c transactions in such cases. * camera_subsystem: Cull unused cameras from the table These are never used and make the table noisy Pull in RP1 firmware at 1facd6e6fc3a1caaa3e3a225e5b5d9eb63471e16 * camera: Add autodetect for imx355 and imx662
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They are only meant to be called every 100ms (arm_loader_update_throttled_status) or 20ms (power_monitor_execute) but are called once per mbox message.
rtos_latch_try() acquires the latch if a message is already waiting (the IRQ handler released it).
For DSI displays where the ID provided by the MCU is unknown, store the value read in device tree so that userspace can do something.
The current kernel does trigger this path during initialisation. Pull in RP1 firmware at d6df137696bdb672690a9f5117b332d2dc5bae47
Store the elapsed time of the I2C read in the cache so that we correctly account for any CSS_CMD_DELAY commands in the read sequence and ensure they are correcly handled if cached.
Some sensors share the same I2C address and id register locations, so we might save a few ms by caching i2c transactions in such cases.
These are never used and make the table noisy Pull in RP1 firmware at 1facd6e6fc3a1caaa3e3a225e5b5d9eb63471e16