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drm/amdgpu: add amdgpu.cg_mask and amdgpu.pg_mask parameters

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They allow disabling clock and power gating from the kernel command line,
which hopefully helps with diagnosing problems in the field.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Nicolai Hähnle <Nicolai.Haehnle@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicolai Hähnle
2016-06-02 12:32:07 +02:00
committed by Alex Deucher
parent f4b373f41c
commit 395d1fb948
3 changed files with 13 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu.h
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@@ -88,6 +88,8 @@ extern int amdgpu_powerplay;
extern int amdgpu_powercontainment;
extern unsigned amdgpu_pcie_gen_cap;
extern unsigned amdgpu_pcie_lane_cap;
extern unsigned amdgpu_cg_mask;
extern unsigned amdgpu_pg_mask;
#define AMDGPU_WAIT_IDLE_TIMEOUT_IN_MS 3000
#define AMDGPU_MAX_USEC_TIMEOUT 100000 /* 100 ms */

3
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -1213,6 +1213,9 @@ static int amdgpu_early_init(struct amdgpu_device *adev)
}
}
adev->cg_flags &= amdgpu_cg_mask;
adev->pg_flags &= amdgpu_pg_mask;
return 0;
}

8
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
View File

@@ -85,6 +85,8 @@ int amdgpu_powerplay = -1;
int amdgpu_powercontainment = 1;
unsigned amdgpu_pcie_gen_cap = 0;
unsigned amdgpu_pcie_lane_cap = 0;
unsigned amdgpu_cg_mask = 0xffffffff;
unsigned amdgpu_pg_mask = 0xffffffff;
MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing, in megabytes");
module_param_named(vramlimit, amdgpu_vram_limit, int, 0600);
@@ -172,6 +174,12 @@ module_param_named(pcie_gen_cap, amdgpu_pcie_gen_cap, uint, 0444);
MODULE_PARM_DESC(pcie_lane_cap, "PCIE Lane Caps (0: autodetect (default))");
module_param_named(pcie_lane_cap, amdgpu_pcie_lane_cap, uint, 0444);
MODULE_PARM_DESC(cg_mask, "Clockgating flags mask (0 = disable clock gating)");
module_param_named(cg_mask, amdgpu_cg_mask, uint, 0444);
MODULE_PARM_DESC(pg_mask, "Powergating flags mask (0 = disable power gating)");
module_param_named(pg_mask, amdgpu_pg_mask, uint, 0444);
static const struct pci_device_id pciidlist[] = {
#ifdef CONFIG_DRM_AMDGPU_CIK
/* Kaveri */