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| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2020-03-19 21:34:27 +0100 |
|---|---|---|
| committer | Qiang Yu <yuq825@gmail.com> | 2020-03-28 16:29:46 +0800 |
| commit | 1996970773a323533e1cc1b6b97f00a95d675f32 (patch) | |
| tree | 15843b481458a6369712db5b6351e45f72ebfde5 /drivers/gpu/drm/lima/lima_sched.c | |
| parent | 6bb0942e8f46863a745489cce27efe5be2a3885e (diff) | |
| download | lwn-1996970773a323533e1cc1b6b97f00a95d675f32.tar.gz lwn-1996970773a323533e1cc1b6b97f00a95d675f32.zip | |
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_sched.c')
| -rw-r--r-- | drivers/gpu/drm/lima/lima_sched.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c index 4fbf2c489507..a2db1c937424 100644 --- a/drivers/gpu/drm/lima/lima_sched.c +++ b/drivers/gpu/drm/lima/lima_sched.c @@ -5,6 +5,7 @@ #include <linux/slab.h> #include <linux/vmalloc.h> +#include "lima_devfreq.h" #include "lima_drv.h" #include "lima_sched.h" #include "lima_vm.h" @@ -216,6 +217,8 @@ static struct dma_fence *lima_sched_run_job(struct drm_sched_job *job) */ ret = dma_fence_get(task->fence); + lima_devfreq_record_busy(&pipe->ldev->devfreq); + pipe->current_task = task; /* this is needed for MMU to work correctly, otherwise GP/PP @@ -418,6 +421,8 @@ static void lima_sched_timedout_job(struct drm_sched_job *job) pipe->current_vm = NULL; pipe->current_task = NULL; + lima_devfreq_record_idle(&pipe->ldev->devfreq); + drm_sched_resubmit_jobs(&pipe->base); drm_sched_start(&pipe->base, true); } @@ -497,5 +502,7 @@ void lima_sched_pipe_task_done(struct lima_sched_pipe *pipe) } else { pipe->task_fini(pipe); dma_fence_signal(task->fence); + + lima_devfreq_record_idle(&pipe->ldev->devfreq); } } |