drm/radeon/kms: block RN50 from using 3D engine.

RN50/ES1000 is a cut-down rv100 chip used in the server market.
The 3D engine on these is either not there or unverified so refuse
any attempt to configure registers on it.

Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 97c9229b9299..0d05909f03f6 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -973,6 +973,11 @@ static int r100_packet0_check(struct radeon_cs_parser *p,
                 case R300_TX_OFFSET_0+52:
                 case R300_TX_OFFSET_0+56:
                 case R300_TX_OFFSET_0+60:
+                        /* rn50 has no 3D engine so fail on any 3d setup */
+                        if (ASIC_IS_RN50(p->rdev)) {
+                                DRM_ERROR("attempt to use RN50 3D engine failed\n");
+                                return -EINVAL;
+                        }
                         r = r100_cs_packet_next_reloc(p, &reloc);
                         if (r) {
                                 DRM_ERROR("No reloc for ib[%d]=0x%04X\n",
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 248e3341a984..7f007185e7f7 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -673,6 +673,8 @@ void r100_pll_errata_after_index(struct radeon_device *rdev);
 /*
  * ASICs helpers.
  */
+#define ASIC_IS_RN50(rdev) ((rdev->pdev->device == 0x515e) || \
+                            (rdev->pdev->device == 0x5969))
 #define ASIC_IS_RV100(rdev) ((rdev->family == CHIP_RV100) || \
                 (rdev->family == CHIP_RV200) || \
                 (rdev->family == CHIP_RS100) || \