drm/radeon: check if pcie gen 2 is already enabled (v2)
If so, skip enabling it to save time.
v2: coding style fixes
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 70c800f..cda280d 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -3703,6 +3703,12 @@
if (!(mask & DRM_PCIE_SPEED_50))
return;
+ speed_cntl = RREG32_PCIE_P(PCIE_LC_SPEED_CNTL);
+ if (speed_cntl & LC_CURRENT_DATA_RATE) {
+ DRM_INFO("PCIE gen 2 link speeds already enabled\n");
+ return;
+ }
+
DRM_INFO("enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0\n");
/* 55 nm r6xx asics */