forked from Minki/linux
1996970773
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
17 lines
490 B
Plaintext
17 lines
490 B
Plaintext
# 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.
|