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author | Wladimir J. van der Laan <laanwj@gmail.com> | 2016-12-15 13:11:30 +0100 |
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committer | Lucas Stach <l.stach@pengutronix.de> | 2017-01-30 12:43:55 +0100 |
commit | e17a0ded5ca158bbb801082edc0810b38b1d4e74 (patch) | |
tree | a40200a8fd9504209e20bf18583cbf61095c7367 /drivers/gpu/drm/etnaviv/etnaviv_gpu.c | |
parent | a1540a7fa4ec53713f19a76f915d9ddeefccfe9f (diff) | |
download | op-kernel-dev-e17a0ded5ca158bbb801082edc0810b38b1d4e74.zip op-kernel-dev-e17a0ded5ca158bbb801082edc0810b38b1d4e74.tar.gz |
drm/etnaviv: set up initial PULSE_EATER register
Set up the PULSE_EATER register (0x0010C) in etnaviv_gpu_hw_init. This
ports three mostly undocumented model/revision-specific register
overrides from the Vivante kernel driver.
This is relevant as at least the "disable internal DFS" for revisions >
0x5420 has shown to have a huge impact on shader performance (sped up
memory read performance by 7.5x and write performance by 1.5x) on an
affected GPU.
Signed-off-by: Wladimir J. van der Laan <laanwj@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_gpu.c')
-rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index 0a67124..8bc68ae 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -546,6 +546,37 @@ void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch) VIVS_FE_COMMAND_CONTROL_PREFETCH(prefetch)); } +static void etnaviv_gpu_setup_pulse_eater(struct etnaviv_gpu *gpu) +{ + /* + * Base value for VIVS_PM_PULSE_EATER register on models where it + * cannot be read, extracted from vivante kernel driver. + */ + u32 pulse_eater = 0x01590880; + + if (etnaviv_is_model_rev(gpu, GC4000, 0x5208) || + etnaviv_is_model_rev(gpu, GC4000, 0x5222)) { + pulse_eater |= BIT(23); + + } + + if (etnaviv_is_model_rev(gpu, GC1000, 0x5039) || + etnaviv_is_model_rev(gpu, GC1000, 0x5040)) { + pulse_eater &= ~BIT(16); + pulse_eater |= BIT(17); + } + + if ((gpu->identity.revision > 0x5420) && + (gpu->identity.features & chipFeatures_PIPE_3D)) + { + /* Performance fix: disable internal DFS */ + pulse_eater = gpu_read(gpu, VIVS_PM_PULSE_EATER); + pulse_eater |= BIT(18); + } + + gpu_write(gpu, VIVS_PM_PULSE_EATER, pulse_eater); +} + static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu) { u16 prefetch; @@ -586,6 +617,9 @@ static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu) gpu_write(gpu, VIVS_MC_BUS_CONFIG, bus_config); } + /* setup the pulse eater */ + etnaviv_gpu_setup_pulse_eater(gpu); + /* setup the MMU */ etnaviv_iommu_restore(gpu); |