On Tue, Oct 25, 2016 at 08:20:46AM +0100, Chris Wilson wrote:
> On Mon, Oct 24, 2016 at 07:13:04PM +0300, ville.syrj...@linux.intel.com wrote:
> > From: Ville Syrjälä <ville.syrj...@linux.intel.com>
> >
> > Pass the framebuffer size in .16 fixed point coordinates to
> > drm_rect_rotate() since that's what the source coordinates are as well
> > at this stage. We used to do this part of the computation in integer
> > coordinates, but that got changed when moving the computation to
> > happen in the check phase of the operation. Unfortunately I forgot
> > to shift up the fb width and height appropriately.
> >
> > With the bogus size we ended up with some negative fb offset, which when
> > added to the vma offset caused out scanout to start at an offset earlier
> > than we inteded. Eg. when testing on my SKL I saw a row of incorrect
> > tiles at the top of my screen.
> >
> > Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
> > Cc: Sivakumar Thulasimani <sivakumar.thulasim...@intel.com>
> > Cc: drm-intel-fi...@lists.freedesktop.org
> > Fixes: b63a16f6cd89 ("drm/i915: Compute display surface offset in the plane
> > check hook for SKL+")
> > Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> > ---
> > drivers/gpu/drm/i915/intel_display.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_display.c
> > b/drivers/gpu/drm/i915/intel_display.c
> > index 5a036999487b..c783f884f85d 100644
> > --- a/drivers/gpu/drm/i915/intel_display.c
> > +++ b/drivers/gpu/drm/i915/intel_display.c
> > @@ -2985,7 +2985,8 @@ int skl_check_plane_surface(struct intel_plane_state
> > *plane_state)
> > /* Rotate src coordinates to match rotated GTT view */
> > if (drm_rotation_90_or_270(rotation))
> > drm_rect_rotate(&plane_state->base.src,
> > - fb->width, fb->height, DRM_ROTATE_270);
> > + fb->width << 16, fb->height << 16,
> > + DRM_ROTATE_270);
>
> Line 2576 (intel_fill_fb_info()) also looks wrong.
>
> drm_rect_rotate(&r,
> rot_info->plane[i].width * tile_width,
> rot_info->plane[i].height * tile_height,
> DRM_ROTATE_270);
That should be fine. No sub-pixel stuff going on in that
function.
--
Ville Syrjälä
Intel OTC
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
