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Diffstat (limited to 'drivers/gpu/drm/radeon/evergreen.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/evergreen.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 14098ace156..e585a3b947e 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -3421,7 +3421,8 @@ void evergreen_fini(struct radeon_device *rdev) void evergreen_pcie_gen2_enable(struct radeon_device *rdev) { - u32 link_width_cntl, speed_cntl; + u32 link_width_cntl, speed_cntl, mask; + int ret; if (radeon_pcie_gen2 == 0) return; @@ -3436,6 +3437,15 @@ void evergreen_pcie_gen2_enable(struct radeon_device *rdev) if (ASIC_IS_X2(rdev)) return; + ret = drm_pcie_get_speed_cap_mask(rdev->ddev, &mask); + if (ret != 0) + return; + + if (!(mask & DRM_PCIE_SPEED_50)) + return; + + DRM_INFO("enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0\n"); + speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL); if ((speed_cntl & LC_OTHER_SIDE_EVER_SENT_GEN2) || (speed_cntl & LC_OTHER_SIDE_SUPPORTS_GEN2)) { |