diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/nbif_v6_3_1.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/nbif_v6_3_1.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/nbif_v6_3_1.c b/drivers/gpu/drm/amd/amdgpu/nbif_v6_3_1.c index fe64c04ee20b..5a20bb229788 100644 --- a/drivers/gpu/drm/amd/amdgpu/nbif_v6_3_1.c +++ b/drivers/gpu/drm/amd/amdgpu/nbif_v6_3_1.c @@ -315,6 +315,7 @@ static u32 nbif_v6_3_1_get_rom_offset(struct amdgpu_device *adev) static void nbif_v6_3_1_program_ltr(struct amdgpu_device *adev) { uint32_t def, data; + u16 devctl2; def = RREG32_SOC15(NBIO, 0, regRCC_EP_DEV0_0_EP_PCIE_TX_LTR_CNTL); data = 0x35EB; @@ -328,13 +329,15 @@ static void nbif_v6_3_1_program_ltr(struct amdgpu_device *adev) if (def != data) WREG32_SOC15(NBIO, 0, regRCC_STRAP0_RCC_BIF_STRAP2, data); - def = data = RREG32_SOC15(NBIO, 0, regBIF_CFG_DEV0_EPF0_DEVICE_CNTL2); + pcie_capability_read_word(adev->pdev, PCI_EXP_DEVCTL2, &devctl2); + + if (adev->pdev->ltr_path == (devctl2 & PCI_EXP_DEVCTL2_LTR_EN)) + return; + if (adev->pdev->ltr_path) - data |= BIF_CFG_DEV0_EPF0_DEVICE_CNTL2__LTR_EN_MASK; + pcie_capability_set_word(adev->pdev, PCI_EXP_DEVCTL2, PCI_EXP_DEVCTL2_LTR_EN); else - data &= ~BIF_CFG_DEV0_EPF0_DEVICE_CNTL2__LTR_EN_MASK; - if (def != data) - WREG32_SOC15(NBIO, 0, regBIF_CFG_DEV0_EPF0_DEVICE_CNTL2, data); + pcie_capability_clear_word(adev->pdev, PCI_EXP_DEVCTL2, PCI_EXP_DEVCTL2_LTR_EN); } #endif |