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drm/amdgpu: add pre_asic_init callback for SOC15 

We need to restore some registers prior to running asic
init to work around a firmware bug.

Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2020-08-19 16:48:17 -04:00
parent cff6c7f91a
commit b0a2db9b48
3 changed files with 26 additions and 18 deletions
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35
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
View File

@ -1075,6 +1075,20 @@ static int gmc_v9_0_gart_init(struct amdgpu_device *adev)
return amdgpu_gart_table_vram_alloc(adev);
}
/**
* gmc_v9_0_save_registers - saves regs
*
* @adev: amdgpu_device pointer
*
* This saves potential register values that should be
* restored upon resume
*/
static void gmc_v9_0_save_registers(struct amdgpu_device *adev)
{
if (adev->asic_type == CHIP_RAVEN)
adev->gmc.sdpif_register = RREG32_SOC15(DCE, 0, mmDCHUBBUB_SDPIF_MMIO_CNTRL_0);
}
static int gmc_v9_0_sw_init(void *handle)
{
int r, vram_width = 0, vram_type = 0, vram_vendor = 0;
@ -1229,6 +1243,8 @@ static int gmc_v9_0_sw_init(void *handle)
amdgpu_vm_manager_init(adev);
gmc_v9_0_save_registers(adev);
return 0;
}
@ -1282,7 +1298,7 @@ static void gmc_v9_0_init_golden_registers(struct amdgpu_device *adev)
*
* This restores register values, saved at suspend.
*/
static void gmc_v9_0_restore_registers(struct amdgpu_device *adev)
void gmc_v9_0_restore_registers(struct amdgpu_device *adev)
{
if (adev->asic_type == CHIP_RAVEN)
WREG32_SOC15(DCE, 0, mmDCHUBBUB_SDPIF_MMIO_CNTRL_0, adev->gmc.sdpif_register);
@ -1386,20 +1402,6 @@ static int gmc_v9_0_hw_init(void *handle)
return r;
}
/**
* gmc_v9_0_save_registers - saves regs
*
* @adev: amdgpu_device pointer
*
* This saves potential register values that should be
* restored upon resume
*/
static void gmc_v9_0_save_registers(struct amdgpu_device *adev)
{
if (adev->asic_type == CHIP_RAVEN)
adev->gmc.sdpif_register = RREG32_SOC15(DCE, 0, mmDCHUBBUB_SDPIF_MMIO_CNTRL_0);
}
/**
* gmc_v9_0_gart_disable - gart disable
*
@ -1440,8 +1442,6 @@ static int gmc_v9_0_suspend(void *handle)
if (r)
return r;
gmc_v9_0_save_registers(adev);
return 0;
}
@ -1450,7 +1450,6 @@ static int gmc_v9_0_resume(void *handle)
int r;
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
gmc_v9_0_restore_registers(adev);
r = gmc_v9_0_hw_init(adev);
if (r)
return r;

2
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.h
View File

@ -26,4 +26,6 @@
extern const struct amd_ip_funcs gmc_v9_0_ip_funcs;
extern const struct amdgpu_ip_block_version gmc_v9_0_ip_block;
void gmc_v9_0_restore_registers(struct amdgpu_device *adev);
#endif

7
drivers/gpu/drm/amd/amdgpu/soc15.c
View File

@ -1029,6 +1029,11 @@ static uint64_t soc15_get_pcie_replay_count(struct amdgpu_device *adev)
return (nak_r + nak_g);
}
static void soc15_pre_asic_init(struct amdgpu_device *adev)
{
gmc_v9_0_restore_registers(adev);
}
static const struct amdgpu_asic_funcs soc15_asic_funcs =
{
.read_disabled_bios = &soc15_read_disabled_bios,
@ -1049,6 +1054,7 @@ static const struct amdgpu_asic_funcs soc15_asic_funcs =
.need_reset_on_init = &soc15_need_reset_on_init,
.get_pcie_replay_count = &soc15_get_pcie_replay_count,
.supports_baco = &soc15_supports_baco,
.pre_asic_init = &soc15_pre_asic_init,
};
static const struct amdgpu_asic_funcs vega20_asic_funcs =
@ -1072,6 +1078,7 @@ static const struct amdgpu_asic_funcs vega20_asic_funcs =
.need_reset_on_init = &soc15_need_reset_on_init,
.get_pcie_replay_count = &soc15_get_pcie_replay_count,
.supports_baco = &soc15_supports_baco,
.pre_asic_init = &soc15_pre_asic_init,
};
static int soc15_common_early_init(void *handle)