drm/i915: Increase max fence pitch limit to 256KB on IVB+
BSpec contains several scattered notes which state that the maximum
fence stride was increased to 256KB on IVB.
Testing on real hardware agrees.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c
index b56185f..537545b 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -217,9 +217,12 @@
tile_width = 512;
/* check maximum stride & object size */
- if (INTEL_INFO(dev)->gen >= 4) {
- /* i965 stores the end address of the gtt mapping in the fence
- * reg, so dont bother to check the size */
+ /* i965+ stores the end address of the gtt mapping in the fence
+ * reg, so dont bother to check the size */
+ if (INTEL_INFO(dev)->gen >= 7) {
+ if (stride / 128 > GEN7_FENCE_MAX_PITCH_VAL)
+ return false;
+ } else if (INTEL_INFO(dev)->gen >= 4) {
if (stride / 128 > I965_FENCE_MAX_PITCH_VAL)
return false;
} else {
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 3b9ec9b..e0fc070 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -430,6 +430,7 @@
#define FENCE_REG_SANDYBRIDGE_0 0x100000
#define SANDYBRIDGE_FENCE_PITCH_SHIFT 32
+#define GEN7_FENCE_MAX_PITCH_VAL 0x0800
/* control register for cpu gtt access */
#define TILECTL 0x101000