diff options
| author | Kenneth Feng <kenneth.feng@amd.com> | 2019-10-11 17:51:34 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-10-15 15:50:37 -0400 |
| commit | 372120f0a5922655eb2579a50d6aafad474fd14c (patch) | |
| tree | c54eedc26b1ba676b59363be4d76b31c6ec4bf24 /drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | |
| parent | bcccee89f48c1e96b2aea067507e89f3581693bb (diff) | |
drm/amd/powerplay: bug fix for pcie parameters override
Bug fix for pcie paramerers override on swsmu.
Below is a scenario to have this problem.
pptable definition on pcie dpm:
0 -> pcie gen speed:1, pcie lanes: *16
1 -> pcie gen speed:4, pcie lanes: *16
Then if we have a system only have the capbility:
pcie gen speed: 3, pcie lanes: *8,
we will override dpm 1 to pcie gen speed 3, pcie lanes *8.
But the code skips the dpm 0 configuration.
So the real pcie dpm parameters are:
0 -> pcie gen speed:1, pcie lanes: *16
1 -> pcie gen speed:3, pcie lanes: *8
Then the wrong pcie lanes will be toggled.
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/powerplay/amdgpu_smu.c')
| -rw-r--r-- | drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c index 8bb5287fe711..6cb52881e955 100644 --- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c +++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c @@ -945,50 +945,6 @@ static int smu_fini_fb_allocations(struct smu_context *smu) return 0; } -static int smu_override_pcie_parameters(struct smu_context *smu) -{ - struct amdgpu_device *adev = smu->adev; - uint32_t pcie_gen = 0, pcie_width = 0, smu_pcie_arg; - int ret; - - if (adev->flags & AMD_IS_APU) - return 0; - - if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN4) - pcie_gen = 3; - else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3) - pcie_gen = 2; - else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2) - pcie_gen = 1; - else if (adev->pm.pcie_gen_mask & CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1) - pcie_gen = 0; - - /* Bit 31:16: LCLK DPM level. 0 is DPM0, and 1 is DPM1 - * Bit 15:8: PCIE GEN, 0 to 3 corresponds to GEN1 to GEN4 - * Bit 7:0: PCIE lane width, 1 to 7 corresponds is x1 to x32 - */ - if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X16) - pcie_width = 6; - else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X12) - pcie_width = 5; - else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X8) - pcie_width = 4; - else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X4) - pcie_width = 3; - else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X2) - pcie_width = 2; - else if (adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X1) - pcie_width = 1; - - smu_pcie_arg = (1 << 16) | (pcie_gen << 8) | pcie_width; - ret = smu_send_smc_msg_with_param(smu, - SMU_MSG_OverridePcieParameters, - smu_pcie_arg); - if (ret) - pr_err("[%s] Attempt to override pcie params failed!\n", __func__); - return ret; -} - static int smu_smc_table_hw_init(struct smu_context *smu, bool initialize) { |