From a567efd377d2c0318e0e1266ce02dc100b2bf625 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 14 May 2013 17:44:31 -0400
Subject: [PATCH] drm/radeon: add r600_get_pcie_lane_support helper
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/radeon/r600_dpm.c | 23 +++++++++++++++++++++++
drivers/gpu/drm/radeon/r600_dpm.h | 4 ++++
2 files changed, 27 insertions(+)
diff --git a/drivers/gpu/drm/radeon/r600_dpm.c b/drivers/gpu/drm/radeon/r600_dpm.c
index bf851ac5491a8..34ea5d6ee4be7 100644
--- a/drivers/gpu/drm/radeon/r600_dpm.c
+++ b/drivers/gpu/drm/radeon/r600_dpm.c
@@ -1223,3 +1223,26 @@ enum radeon_pcie_gen r600_get_pcie_gen_support(struct radeon_device *rdev,
}
return RADEON_PCIE_GEN1;
}
+
+u16 r600_get_pcie_lane_support(struct radeon_device *rdev,
+ u16 asic_lanes,
+ u16 default_lanes)
+{
+ switch (asic_lanes) {
+ case 0:
+ default:
+ return default_lanes;
+ case 1:
+ return 1;
+ case 2:
+ return 2;
+ case 4:
+ return 4;
+ case 8:
+ return 8;
+ case 12:
+ return 12;
+ case 16:
+ return 16;
+ }
+}
diff --git a/drivers/gpu/drm/radeon/r600_dpm.h b/drivers/gpu/drm/radeon/r600_dpm.h
index 7c822d9ae53d6..71d5d93c371ba 100644
--- a/drivers/gpu/drm/radeon/r600_dpm.h
+++ b/drivers/gpu/drm/radeon/r600_dpm.h
@@ -224,4 +224,8 @@ enum radeon_pcie_gen r600_get_pcie_gen_support(struct radeon_device *rdev,
enum radeon_pcie_gen asic_gen,
enum radeon_pcie_gen default_gen);
+u16 r600_get_pcie_lane_support(struct radeon_device *rdev,
+ u16 asic_lanes,
+ u16 default_lanes);
+
#endif
--
2.39.5