diff options
| author | Rob Herring <robh@kernel.org> | 2019-08-26 17:33:17 -0500 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2019-08-30 09:53:52 -0500 |
| commit | 45d0dbd15a3b89ced53e058bc71b751e6473b664 (patch) | |
| tree | 77f7f1f56def62e500b40003537e8ed36493a371 | |
| parent | 62f1089f3cbe7d99ced92bf96a8158813b75e5e8 (diff) | |
drm/panfrost: Remove unnecessary hwaccess_lock spin_lock
With the introduction of the as_lock to serialize address space registers,
the hwaccess_lock is only used within the job code and is not protecting
anything. panfrost_job_hw_submit() only accesses registers for 1 job slot
and it's already serialized by drm_sched.
Fixes: 7282f7645d06 ("drm/panfrost: Implement per FD address spaces")
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190826223317.28509-9-robh@kernel.org
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_device.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_device.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_job.c | 4 |
3 files changed, 0 insertions, 7 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c index 73805210834e..46b0b02e4289 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.c +++ b/drivers/gpu/drm/panfrost/panfrost_device.c @@ -124,7 +124,6 @@ int panfrost_device_init(struct panfrost_device *pfdev) INIT_LIST_HEAD(&pfdev->scheduled_jobs); INIT_LIST_HEAD(&pfdev->as_lru_list); - spin_lock_init(&pfdev->hwaccess_lock); spin_lock_init(&pfdev->as_lock); err = panfrost_clk_init(pfdev); diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index b7fa08ed3a23..9c39b9794811 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -63,8 +63,6 @@ struct panfrost_device { struct drm_device *ddev; struct platform_device *pdev; - spinlock_t hwaccess_lock; - void __iomem *iomem; struct clk *clock; struct clk *bus_clock; diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index 18bcc9bac6d2..a58551668d9a 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -141,7 +141,6 @@ static void panfrost_job_write_affinity(struct panfrost_device *pfdev, static void panfrost_job_hw_submit(struct panfrost_job *job, int js) { struct panfrost_device *pfdev = job->pfdev; - unsigned long flags; u32 cfg; u64 jc_head = job->jc; int ret; @@ -158,7 +157,6 @@ static void panfrost_job_hw_submit(struct panfrost_job *job, int js) cfg = panfrost_mmu_as_get(pfdev, &job->file_priv->mmu); panfrost_devfreq_record_transition(pfdev, js); - spin_lock_irqsave(&pfdev->hwaccess_lock, flags); job_write(pfdev, JS_HEAD_NEXT_LO(js), jc_head & 0xFFFFFFFF); job_write(pfdev, JS_HEAD_NEXT_HI(js), jc_head >> 32); @@ -187,8 +185,6 @@ static void panfrost_job_hw_submit(struct panfrost_job *job, int js) job, js, jc_head); job_write(pfdev, JS_COMMAND_NEXT(js), JS_COMMAND_START); - - spin_unlock_irqrestore(&pfdev->hwaccess_lock, flags); } static void panfrost_acquire_object_fences(struct drm_gem_object **bos, |