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| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2020-03-19 23:34:27 +0300 |
|---|---|---|
| committer | Qiang Yu <yuq825@gmail.com> | 2020-03-28 11:29:46 +0300 |
| commit | 1996970773a323533e1cc1b6b97f00a95d675f32 (patch) | |
| tree | 15843b481458a6369712db5b6351e45f72ebfde5 /drivers/gpu/drm/lima/lima_device.c | |
| parent | 6bb0942e8f46863a745489cce27efe5be2a3885e (diff) | |
| download | linux-1996970773a323533e1cc1b6b97f00a95d675f32.tar.xz | |
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
Diffstat (limited to 'drivers/gpu/drm/lima/lima_device.c')
| -rw-r--r-- | drivers/gpu/drm/lima/lima_device.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/lima/lima_device.c b/drivers/gpu/drm/lima/lima_device.c index 42a00171fea5..247f51fd40a2 100644 --- a/drivers/gpu/drm/lima/lima_device.c +++ b/drivers/gpu/drm/lima/lima_device.c @@ -214,6 +214,8 @@ static int lima_init_gp_pipe(struct lima_device *dev) struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_gp; int err; + pipe->ldev = dev; + err = lima_sched_pipe_init(pipe, "gp"); if (err) return err; @@ -244,6 +246,8 @@ static int lima_init_pp_pipe(struct lima_device *dev) struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp; int err, i; + pipe->ldev = dev; + err = lima_sched_pipe_init(pipe, "pp"); if (err) return err; |