On Wed, 31 Oct 2012 17:50:18 +0200 ville.syrj...@linux.intel.com wrote: > From: Ville Syrjälä <ville.syrj...@linux.intel.com> > > Make sure the the framebuffer stride is smaller than 32k. That > seems to be the limit on recent hardware. Not quite sure if > <=Gen4 has smaller limits. > > Also when using a tiled memory make sure the object stride matches > the framebuffer stride. > > Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com> > --- > > I had an earlier version a long time ago that tried to use smaller stride > limits > on <=Gen4, but as there isn't clear information what those limits are, I > decided > to just check for the 32K limit everywhere. It's definitely an upper bound for > the older hardware as well. > > drivers/gpu/drm/i915/intel_display.c | 8 ++++++++ > 1 files changed, 8 insertions(+), 0 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_display.c > b/drivers/gpu/drm/i915/intel_display.c > index b42637b..f431f2a 100644 > --- a/drivers/gpu/drm/i915/intel_display.c > +++ b/drivers/gpu/drm/i915/intel_display.c > @@ -8235,6 +8235,14 @@ int intel_framebuffer_init(struct drm_device *dev, > if (mode_cmd->pitches[0] & 63) > return -EINVAL; > > + /* FIXME <= Gen4 stride limits are bit unclear */ > + if (mode_cmd->pitches[0] > 32768) > + return -EINVAL; > + > + if (obj->tiling_mode != I915_TILING_NONE && > + mode_cmd->pitches[0] != obj->stride) > + return -EINVAL; > + > /* Reject formats not supported by any plane early. */ > switch (mode_cmd->pixel_format) { > case DRM_FORMAT_C8:
The bspec archive should have the pre-gen4 info, but this is a good start. Reviewed-by: Jesse Barnes <jbar...@virtuousgeek.org> -- Jesse Barnes, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx