lkml.org 
[lkml]   [2020]   [Jun]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v4 0/3] DCMI set minimum cpufreq requirement
Date
This series allow to STM32 camera interface (DCMI) to require a minimum
frequency to the CPUs before start streaming frames from the sensor.
The minimum frequency requirement is provided in the devide-tree node.

Setting a minimum frequency for the CPUs is needed to ensure a quick handling
of the interrupts between two sensor frames and avoid dropping half of them.

version 4:
- simplify irq affinity handling by using only dcmi_irq_notifier_notify()

version 3:
- add a cpumask field to track boosted CPUs
- add irq_affinity_notify callback
- protect cpumask field with a mutex

Benjamin Gaignard (3):
dt-bindings: media: stm32-dcmi: Add DCMI min frequency property
media: stm32-dcmi: Set minimum cpufreq requirement
ARM: dts: stm32: Set DCMI frequency requirement for stm32mp15x

.../devicetree/bindings/media/st,stm32-dcmi.yaml | 8 ++
arch/arm/boot/dts/stm32mp151.dtsi | 1 +
drivers/media/platform/stm32/stm32-dcmi.c | 122 +++++++++++++++++++--
3 files changed, 123 insertions(+), 8 deletions(-)

--
2.15.0

\
 
 \ /
  Last update: 2020-06-05 15:07    [W:0.056 / U:0.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site