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msm: kgsl: use kgsl_mmu_device_setstate() whenever the gpu is idle

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We really don't want new GPU commands or events to be generated
just to manage the iommu while we are idle.

Change-Id: I2e8740bee8c25c93bddc51a90a3370d151aaf558
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
This commit is contained in:
Jeremy Gebben
2013-07-10 07:11:13 -07:00
committed by Gerrit - the friendly Code Review server
parent a65516bd80
commit 708089fe3b
1 changed files with 23 additions and 5 deletions
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drivers/gpu/msm/adreno.c
+23 -5
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@@ -820,6 +820,27 @@ static unsigned int _adreno_iommu_setstate_v1(struct kgsl_device *device,
return cmds - cmds_orig;
}
/**
* adreno_use_default_setstate() - Use CPU instead of the GPU to manage the mmu?
* @adreno_dev: the device
*
* In many cases it is preferable to poke the iommu or gpummu directly rather
* than using the GPU command stream. If we are idle or trying to go to a low
* power state, using the command stream will be slower and asynchronous, which
* needlessly complicates the power state transitions. Additionally,
* the hardware simulators do not support command stream MMU operations so
* the command stream can never be used if we are capturing CFF data.
*
*/
static bool adreno_use_default_setstate(struct adreno_device *adreno_dev)
{
return (adreno_isidle(&adreno_dev->dev) ||
adreno_dev->drawctxt_active == NULL ||
KGSL_STATE_ACTIVE != adreno_dev->dev.state ||
atomic_read(&adreno_dev->dev.active_cnt) == 0 ||
adreno_dev->dev.cff_dump_enable);
}
static void adreno_iommu_setstate(struct kgsl_device *device,
unsigned int context_id,
uint32_t flags)
@@ -834,10 +855,7 @@ static void adreno_iommu_setstate(struct kgsl_device *device,
struct adreno_context *adreno_ctx = NULL;
struct adreno_ringbuffer *rb = &adreno_dev->ringbuffer;
if (!adreno_dev->drawctxt_active ||
KGSL_STATE_ACTIVE != device->state ||
!atomic_read(&device->active_cnt) ||
device->cff_dump_enable) {
if (adreno_use_default_setstate(adreno_dev)) {
kgsl_mmu_device_setstate(&device->mmu, flags);
return;
}
@@ -917,7 +935,7 @@ static void adreno_gpummu_setstate(struct kgsl_device *device,
* writes For CFF dump we must idle and use the registers so that it is
* easier to filter out the mmu accesses from the dump
*/
if (!device->cff_dump_enable && adreno_dev->drawctxt_active) {
if (!adreno_use_default_setstate(adreno_dev)) {
context = kgsl_context_get(device, context_id);
if (context == NULL)
return;