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Merge branch 'drm-etnaviv-next' of git://git.pengutronix.de/git/lst/linux into drm-next 

etnaviv-next only contains two patches to get rid of a confusing error
message and finally one patch to enable the autonomous GPU clock gating.

* 'drm-etnaviv-next' of git://git.pengutronix.de/git/lst/linux:
  drm/etnaviv: remove generic GPU init failure reporting
  drm/etnaviv: improve error reporting in GPU init path
  drm/etnaviv: enable GPU module level clock gating support
This commit is contained in:
Dave Airlie 2016-07-08 13:30:22 +10:00
parent ccd0e7887b c1c77b0e07
commit 429a9ccdf2
3 changed files with 60 additions and 5 deletions
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4
drivers/gpu/drm/etnaviv/etnaviv_drv.c
View File

@ -91,10 +91,8 @@ static void load_gpu(struct drm_device *dev)
int ret;
ret = etnaviv_gpu_init(g);
if (ret) {
dev_err(g->dev, "hw init failed: %d\n", ret);
if (ret)
priv->gpu[i] = NULL;
}
}
}
}

54
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
View File

@ -487,6 +487,47 @@ static int etnaviv_hw_reset(struct etnaviv_gpu *gpu)
return 0;
}
static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu)
{
u32 pmc, ppc;
/* enable clock gating */
ppc = gpu_read(gpu, VIVS_PM_POWER_CONTROLS);
ppc |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING;
/* Disable stall module clock gating for 4.3.0.1 and 4.3.0.2 revs */
if (gpu->identity.revision == 0x4301 ||
gpu->identity.revision == 0x4302)
ppc |= VIVS_PM_POWER_CONTROLS_DISABLE_STALL_MODULE_CLOCK_GATING;
gpu_write(gpu, VIVS_PM_POWER_CONTROLS, ppc);
pmc = gpu_read(gpu, VIVS_PM_MODULE_CONTROLS);
/* Disable PA clock gating for GC400+ except for GC420 */
if (gpu->identity.model >= chipModel_GC400 &&
gpu->identity.model != chipModel_GC420)
pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA;
/*
* Disable PE clock gating on revs < 5.0.0.0 when HZ is
* present without a bug fix.
*/
if (gpu->identity.revision < 0x5000 &&
gpu->identity.minor_features0 & chipMinorFeatures0_HZ &&
!(gpu->identity.minor_features1 &
chipMinorFeatures1_DISABLE_PE_GATING))
pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE;
if (gpu->identity.revision < 0x5422)
pmc |= BIT(15); /* Unknown bit */
pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ;
pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ;
gpu_write(gpu, VIVS_PM_MODULE_CONTROLS, pmc);
}
static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu)
{
u16 prefetch;
@ -506,6 +547,9 @@ static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu)
gpu_write(gpu, VIVS_MC_DEBUG_MEMORY, mc_memory_debug);
}
/* enable module-level clock gating */
etnaviv_gpu_enable_mlcg(gpu);
/*
* Update GPU AXI cache atttribute to "cacheable, no allocate".
* This is necessary to prevent the iMX6 SoC locking up.
@ -553,8 +597,10 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
bool mmuv2;
ret = pm_runtime_get_sync(gpu->dev);
if (ret < 0)
if (ret < 0) {
dev_err(gpu->dev, "Failed to enable GPU power domain\n");
return ret;
}
etnaviv_hw_identify(gpu);
@ -591,8 +637,10 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
}
ret = etnaviv_hw_reset(gpu);
if (ret)
if (ret) {
dev_err(gpu->dev, "GPU reset failed\n");
goto fail;
}
/* Setup IOMMU.. eventually we will (I think) do this once per context
* and have separate page tables per context. For now, to keep things
@ -610,12 +658,14 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
}
if (!iommu) {
dev_err(gpu->dev, "Failed to allocate GPU IOMMU domain\n");
ret = -ENOMEM;
goto fail;
}
gpu->mmu = etnaviv_iommu_new(gpu, iommu, version);
if (!gpu->mmu) {
dev_err(gpu->dev, "Failed to instantiate GPU IOMMU\n");
iommu_domain_free(iommu);
ret = -ENOMEM;
goto fail;

7
drivers/gpu/drm/etnaviv/state_hi.xml.h
View File

@ -218,6 +218,13 @@ Copyright (C) 2015
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_FE 0x00000001
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_DE 0x00000002
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE 0x00000004
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_SH 0x00000008
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA 0x00000010
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_SE 0x00000020
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA 0x00000040
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX 0x00000080
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ 0x00010000
#define VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ 0x00020000
#define VIVS_PM_MODULE_STATUS 0x00000108
#define VIVS_PM_MODULE_STATUS_MODULE_CLOCK_GATED_FE 0x00000001