MIRRORS/linux-yocto
1
0
Fork 0
mirror of git://git.yoctoproject.org/linux-yocto.git synced 2025-07-10 07:45:21 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity
a5492fe27f
linux-yocto/drivers/gpu/drm/lima/Kconfig
Martin Blumenstingl 1996970773 drm/lima: Add optional devfreq and cooling device support 
Most platforms with a Mali-400 or Mali-450 GPU also have support for
changing the GPU clock frequency. Add devfreq support so the GPU clock
rate is updated based on the actual GPU usage when the
"operating-points-v2" property is present in the board.dts.

The actual devfreq code is taken from panfrost_devfreq.c and modified so
it matches what the lima hardware needs:
- a call to dev_pm_opp_set_clkname() during initialization because there
  are two clocks on Mali-4x0 IPs. "core" is the one that actually clocks
  the GPU so we need to control it using devfreq.
- locking when reading or writing the devfreq statistics because (unlike
  than panfrost) we have multiple PP and GP IRQs which may finish jobs
  concurrently.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200319203427.2259891-3-martin.blumenstingl@googlemail.com
2020-03-28 16:29:46 +08:00

490 B
Raw Blame History

SPDX-License-Identifier: GPL-2.0 OR MIT

Copyright 2017-2019 Qiang Yu yuq825@gmail.com

config DRM_LIMA tristate "LIMA (DRM support for ARM Mali 400/450 GPU)" depends on DRM depends on ARM || ARM64 || COMPILE_TEST depends on MMU depends on COMMON_CLK depends on OF select DRM_SCHED select DRM_GEM_SHMEM_HELPER select PM_DEVFREQ select DEVFREQ_GOV_SIMPLE_ONDEMAND help DRM driver for ARM Mali 400/450 GPUs.