drm/radeon/kms: add functions to get current pcie lanes
Currently unused.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index 748335c..5897bd0 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -580,6 +580,37 @@
}
+int rv370_get_pcie_lanes(struct radeon_device *rdev)
+{
+ u32 link_width_cntl;
+
+ if (rdev->flags & RADEON_IS_IGP)
+ return 0;
+
+ if (!(rdev->flags & RADEON_IS_PCIE))
+ return 0;
+
+ /* FIXME wait for idle */
+
+ link_width_cntl = RREG32_PCIE(RADEON_PCIE_LC_LINK_WIDTH_CNTL);
+
+ switch ((link_width_cntl & RADEON_PCIE_LC_LINK_WIDTH_RD_MASK) >> RADEON_PCIE_LC_LINK_WIDTH_RD_SHIFT) {
+ case RADEON_PCIE_LC_LINK_WIDTH_X0:
+ return 0;
+ case RADEON_PCIE_LC_LINK_WIDTH_X1:
+ return 1;
+ case RADEON_PCIE_LC_LINK_WIDTH_X2:
+ return 2;
+ case RADEON_PCIE_LC_LINK_WIDTH_X4:
+ return 4;
+ case RADEON_PCIE_LC_LINK_WIDTH_X8:
+ return 8;
+ case RADEON_PCIE_LC_LINK_WIDTH_X16:
+ default:
+ return 16;
+ }
+}
+
#if defined(CONFIG_DEBUG_FS)
static int rv370_debugfs_pcie_gart_info(struct seq_file *m, void *data)
{
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index d7da6e7..df21edc 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -678,6 +678,7 @@
void (*set_engine_clock)(struct radeon_device *rdev, uint32_t eng_clock);
uint32_t (*get_memory_clock)(struct radeon_device *rdev);
void (*set_memory_clock)(struct radeon_device *rdev, uint32_t mem_clock);
+ int (*get_pcie_lanes)(struct radeon_device *rdev);
void (*set_pcie_lanes)(struct radeon_device *rdev, int lanes);
void (*set_clock_gating)(struct radeon_device *rdev, int enable);
int (*set_surface_reg)(struct radeon_device *rdev, int reg,
@@ -1044,6 +1045,7 @@
#define radeon_set_engine_clock(rdev, e) (rdev)->asic->set_engine_clock((rdev), (e))
#define radeon_get_memory_clock(rdev) (rdev)->asic->get_memory_clock((rdev))
#define radeon_set_memory_clock(rdev, e) (rdev)->asic->set_memory_clock((rdev), (e))
+#define radeon_get_pcie_lanes(rdev) (rdev)->asic->get_pcie_lanes((rdev))
#define radeon_set_pcie_lanes(rdev, l) (rdev)->asic->set_pcie_lanes((rdev), (l))
#define radeon_set_clock_gating(rdev, e) (rdev)->asic->set_clock_gating((rdev), (e))
#define radeon_set_surface_reg(rdev, r, f, p, o, s) ((rdev)->asic->set_surface_reg((rdev), (r), (f), (p), (o), (s)))
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index 05ee1ae..d758b1ff 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -108,6 +108,7 @@
.set_engine_clock = &radeon_legacy_set_engine_clock,
.get_memory_clock = &radeon_legacy_get_memory_clock,
.set_memory_clock = NULL,
+ .get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_legacy_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
@@ -138,6 +139,7 @@
extern uint32_t rv370_pcie_rreg(struct radeon_device *rdev, uint32_t reg);
extern void rv370_pcie_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v);
extern void rv370_set_pcie_lanes(struct radeon_device *rdev, int lanes);
+extern int rv370_get_pcie_lanes(struct radeon_device *rdev);
extern int r300_copy_dma(struct radeon_device *rdev,
uint64_t src_offset,
uint64_t dst_offset,
@@ -168,6 +170,7 @@
.set_engine_clock = &radeon_legacy_set_engine_clock,
.get_memory_clock = &radeon_legacy_get_memory_clock,
.set_memory_clock = NULL,
+ .get_pcie_lanes = &rv370_get_pcie_lanes,
.set_pcie_lanes = &rv370_set_pcie_lanes,
.set_clock_gating = &radeon_legacy_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
@@ -212,6 +215,7 @@
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
+ .get_pcie_lanes = &rv370_get_pcie_lanes,
.set_pcie_lanes = &rv370_set_pcie_lanes,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
@@ -261,6 +265,7 @@
.set_engine_clock = &radeon_legacy_set_engine_clock,
.get_memory_clock = &radeon_legacy_get_memory_clock,
.set_memory_clock = NULL,
+ .get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_legacy_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
@@ -320,6 +325,7 @@
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
+ .get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_atom_set_clock_gating,
.bandwidth_update = &rs600_bandwidth_update,
@@ -366,6 +372,7 @@
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
+ .get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
@@ -418,6 +425,7 @@
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
+ .get_pcie_lanes = &rv370_get_pcie_lanes,
.set_pcie_lanes = &rv370_set_pcie_lanes,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
@@ -461,6 +469,7 @@
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
+ .get_pcie_lanes = &rv370_get_pcie_lanes,
.set_pcie_lanes = &rv370_set_pcie_lanes,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r100_set_surface_reg,
@@ -538,6 +547,7 @@
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
+ .get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r600_set_surface_reg,
@@ -583,6 +593,7 @@
.set_engine_clock = &radeon_atom_set_engine_clock,
.get_memory_clock = &radeon_atom_get_memory_clock,
.set_memory_clock = &radeon_atom_set_memory_clock,
+ .get_pcie_lanes = NULL,
.set_pcie_lanes = NULL,
.set_clock_gating = &radeon_atom_set_clock_gating,
.set_surface_reg = r600_set_surface_reg,
