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gpu: nvgpu: update golden image flag for RG seq

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The flag pmu->pg->golden_image_initialized is set to
true during initial GPU context creation and is not
cleared while the GPU goes into pm_suspend (during railgate).
Hence, when the GPU resumes after un-railgate it retains
the previous value which can cause ELPG to kick in immediately.
Due to this, when ELPG and Railgating are enabled, IDLE_SNAP
is seen for read access of gr_gpc0_tpc0_sm_arch_r reg.

To resolve this, if golden image is ready set the
pmu->pg->golden_image_initialized to suspend state during railgate,
to delay the early enable of ELPG. Add a new
pmu_init_golden_img_state hal in the NVGPU_INIT_TABLE_ENTRY.
This will be called after all the GR access is done and GPU resumes
completely after un-railgate. This hal will then check if
golden_image_initialized flag is in suspend state, it will set it
to ready state and then re-enable ELPG.

Bug 3431798

Change-Id: I1fee83e66e09b6b78d385bbe60529d0724f79e79
Signed-off-by: Divya <dsinghatwari@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2639188
Reviewed-by: Mahantesh Kumbar <mkumbar@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Divya
2021-12-09 05:36:44 +00:00
committed by mobile promotions
parent ae166bba8a
commit 9446cfa320
9 changed files with 106 additions and 10 deletions
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8
drivers/gpu/nvgpu/common/init/nvgpu_init.c
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@@ -58,6 +58,10 @@
#include <nvgpu/pmu/pmu_pstate.h>
#endif
#ifdef CONFIG_NVGPU_POWER_PG
#include <nvgpu/pmu/pmu_pg.h>
#endif
bool is_nvgpu_gpu_state_valid(struct gk20a *g)
{
u32 boot_0 = g->ops.mc.get_chip_details(g, NULL, NULL, NULL);
@@ -916,6 +920,10 @@ int nvgpu_finalize_poweron(struct gk20a *g)
NVGPU_INIT_TABLE_ENTRY(&nvgpu_init_syncpt_mem, NO_FLAG),
#ifdef CONFIG_NVGPU_PROFILER
NVGPU_INIT_TABLE_ENTRY(&nvgpu_pm_reservation_init, NO_FLAG),
#endif
#ifdef CONFIG_NVGPU_POWER_PG
NVGPU_INIT_TABLE_ENTRY(g->ops.pmu.pmu_restore_golden_img_state,
NO_FLAG),
#endif
NVGPU_INIT_TABLE_ENTRY(g->ops.channel.resume_all_serviceable_ch,
NO_FLAG),