5 files changed, 21 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index c9e93eabcf16..4e0a80467b44 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -94,6 +94,15 @@ int r100_pci_gart_init(struct radeon_device *rdev)
         return radeon_gart_table_ram_alloc(rdev);
 }
 
+/* required on r1xx, r2xx, r300, r(v)350, r420/r481, rs400/rs480 */
+void r100_enable_bm(struct radeon_device *rdev)
+{
+        uint32_t tmp;
+        /* Enable bus mastering */
+        tmp = RREG32(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
+        WREG32(RADEON_BUS_CNTL, tmp);
+}
+
 int r100_pci_gart_enable(struct radeon_device *rdev)
 {
         uint32_t tmp;
@@ -105,9 +114,6 @@ int r100_pci_gart_enable(struct radeon_device *rdev)
         WREG32(RADEON_AIC_LO_ADDR, rdev->mc.gtt_location);
         tmp = rdev->mc.gtt_location + rdev->mc.gtt_size - 1;
         WREG32(RADEON_AIC_HI_ADDR, tmp);
-        /* Enable bus mastering */
-        tmp = RREG32(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
-        WREG32(RADEON_BUS_CNTL, tmp);
         /* set PCI GART page-table base address */
         WREG32(RADEON_AIC_PT_BASE, rdev->gart.table_addr);
         tmp = RREG32(RADEON_AIC_CNTL) | RADEON_PCIGART_TRANSLATE_EN;
@@ -3108,6 +3114,7 @@ static int r100_startup(struct radeon_device *rdev)
         r100_gpu_init(rdev);
         /* Initialize GART (initialize after TTM so we can allocate
          * memory through TTM but finalize after TTM) */
+        r100_enable_bm(rdev);
         if (rdev->flags & RADEON_IS_PCI) {
                 r = r100_pci_gart_enable(rdev);
                 if (r)
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index 2f43ee8e4048..9a5798544b42 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -1193,6 +1193,12 @@ static int r300_startup(struct radeon_device *rdev)
                 if (r)
                         return r;
         }
+
+        if (rdev->family == CHIP_R300 ||
+            rdev->family == CHIP_R350 ||
+            rdev->family == CHIP_RV350)
+                r100_enable_bm(rdev);
+
         if (rdev->flags & RADEON_IS_PCI) {
                 r = r100_pci_gart_enable(rdev);
                 if (r)
diff --git a/drivers/gpu/drm/radeon/r420.c b/drivers/gpu/drm/radeon/r420.c
index 1cefdbcc0850..e7e4f5a90ebe 100644
--- a/drivers/gpu/drm/radeon/r420.c
+++ b/drivers/gpu/drm/radeon/r420.c
@@ -335,6 +335,9 @@ int r420_init(struct radeon_device *rdev)
         if (r) {
                 return r;
         }
+        if (rdev->family == CHIP_R420)
+                r100_enable_bm(rdev);
+
         if (rdev->flags & RADEON_IS_PCIE) {
                 r = rv370_pcie_gart_init(rdev);
                 if (r)
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 224506a2f7b1..9cb81a805d14 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -1029,6 +1029,7 @@ extern int r100_cs_parse_packet0(struct radeon_cs_parser *p,
 extern int r100_cs_packet_parse(struct radeon_cs_parser *p,
                                 struct radeon_cs_packet *pkt,
                                 unsigned idx);
+extern void r100_enable_bm(struct radeon_device *rdev);
 
 /* rv200,rv250,rv280 */
 extern void r200_set_safe_registers(struct radeon_device *rdev);
diff --git a/drivers/gpu/drm/radeon/rs400.c b/drivers/gpu/drm/radeon/rs400.c
index ca037160a582..f1de558aeb39 100644
--- a/drivers/gpu/drm/radeon/rs400.c
+++ b/drivers/gpu/drm/radeon/rs400.c
@@ -387,6 +387,7 @@ static int rs400_startup(struct radeon_device *rdev)
         r300_clock_startup(rdev);
         /* Initialize GPU configuration (# pipes, ...) */
         rs400_gpu_init(rdev);
+        r100_enable_bm(rdev);
         /* Initialize GART (initialize after TTM so we can allocate
          * memory through TTM but finalize after TTM) */
         r = rs400_gart_enable(rdev);