diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/i9xx_plane.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/i9xx_plane.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/i9xx_plane.c b/drivers/gpu/drm/i915/display/i9xx_plane.c index d30374df67f0..e3e69e6cef65 100644 --- a/drivers/gpu/drm/i915/display/i9xx_plane.c +++ b/drivers/gpu/drm/i915/display/i9xx_plane.c @@ -256,6 +256,33 @@ int i9xx_check_plane_surface(struct intel_plane_state *plane_state) offset = 0; /* + * When using an X-tiled surface the plane starts to + * misbehave if the x offset + width exceeds the stride. + * hsw/bdw: underrun galore + * ilk/snb/ivb: wrap to the next tile row mid scanout + * i965/g4x: so far appear immune to this + * vlv/chv: TODO check + * + * Linear surfaces seem to work just fine, even on hsw/bdw + * despite them not using the linear offset anymore. + */ + if (INTEL_GEN(dev_priv) >= 4 && fb->modifier == I915_FORMAT_MOD_X_TILED) { + u32 alignment = intel_surf_alignment(fb, 0); + int cpp = fb->format->cpp[0]; + + while ((src_x + src_w) * cpp > plane_state->color_plane[0].stride) { + if (offset == 0) { + drm_dbg_kms(&dev_priv->drm, + "Unable to find suitable display surface offset due to X-tiling\n"); + return -EINVAL; + } + + offset = intel_plane_adjust_aligned_offset(&src_x, &src_y, plane_state, 0, + offset, offset - alignment); + } + } + + /* * Put the final coordinates back so that the src * coordinate checks will see the right values. */ |