On Thu, Sep 06, 2018 at 02:30:24PM +0300, Ville Syrjälä wrote:
> On Wed, Sep 05, 2018 at 04:46:01PM -0400, Sean Paul wrote:
> > From: Sean Paul <seanpaul@xxxxxxxxxxxx>
> >
> > I ran across this last week when I was trying to get this function to
> > work. It's useful to have the scale values in the log upon failure.
> >
> > Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/drm_atomic_helper.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> > index 2c23a48482da..1725546d5105 100644
> > --- a/drivers/gpu/drm/drm_atomic_helper.c
> > +++ b/drivers/gpu/drm/drm_atomic_helper.c
> > @@ -758,7 +758,8 @@ int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
> > hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
> > vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale);
> > if (hscale < 0 || vscale < 0) {
> > - DRM_DEBUG_KMS("Invalid scaling of plane\n");
> > + DRM_DEBUG_KMS("Invalid scaling of plane (%d/%d)\n",
> > + hscale, vscale);
>
> I think it's just going to be -ERANGE for at least one of them.
> So not quite sure what extra benefit we get from this. What
> might be more helpful is printing the actual computed scale
> factor and the min/max.
Good point, it will tell you which scale is invalid, but not necessarily why.
I'll tweak the args for drm_rect_calc_*scale to return -errno and pass *scale by
pointer.
v2 incoming
Sean
>
> > drm_rect_debug_print("src: ", &plane_state->src, true);
> > drm_rect_debug_print("dst: ", &plane_state->dst, false);
> > return -ERANGE;
> > --
> > Sean Paul, Software Engineer, Google / Chromium OS
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
>
> --
> Ville Syrjälä
> Intel
--
Sean Paul, Software Engineer, Google / Chromium OS
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