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drm/amdgpu/cik: add need_reset_on_init asic callback for CIK (v2)

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CIK chips require a reset if the driver was previously loaded
because the SMU can only be loaded once between each reset.

v2: rebase

Reviewed-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2018-10-31 23:58:56 -05:00
parent 7450bbe781
commit 3fcc10d73d
1 changed files with 18 additions and 0 deletions
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18
drivers/gpu/drm/amd/amdgpu/cik.c
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@ -1787,6 +1787,23 @@ static void cik_get_pcie_usage(struct amdgpu_device *adev, uint64_t *count0,
*count1 = RREG32_PCIE(ixPCIE_PERF_COUNT1_TXCLK) | (cnt1_of << 32);
}
static bool cik_need_reset_on_init(struct amdgpu_device *adev)
{
u32 clock_cntl, pc;
if (adev->flags & AMD_IS_APU)
return false;
/* check if the SMC is already running */
clock_cntl = RREG32_SMC(ixSMC_SYSCON_CLOCK_CNTL_0);
pc = RREG32_SMC(ixSMC_PC_C);
if ((0 == REG_GET_FIELD(clock_cntl, SMC_SYSCON_CLOCK_CNTL_0, ck_disable)) &&
(0x20100 <= pc))
return true;
return false;
}
static const struct amdgpu_asic_funcs cik_asic_funcs =
{
.read_disabled_bios = &cik_read_disabled_bios,
@ -1803,6 +1820,7 @@ static const struct amdgpu_asic_funcs cik_asic_funcs =
.need_full_reset = &cik_need_full_reset,
.init_doorbell_index = &legacy_doorbell_index_init,
.get_pcie_usage = &cik_get_pcie_usage,
.need_reset_on_init = &cik_need_reset_on_init,
};
static int cik_common_early_init(void *handle)