> -----Original Message----- > From: Intel-xe <intel-xe-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Ville Syrjala > Sent: Friday, July 5, 2024 8:23 PM > To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx > Cc: intel-xe@xxxxxxxxxxxxxxxxxxxxx > Subject: [PATCH 20/20] drm/xe/fbdev: Adjust fbdev stolen mem usage heuristic > > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > Replace the "1/2 of stolen size" fbdev fb size heuristic with something a bit more > clever, that is ask the FBC code how much stolen mem it would like to have > avaialable for its CFB use. Looks Good to me. Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx> > TODO: > - This doesn't account for the fact that FBC's idea > usable stolen size might differ from other users of stolen > - Would be nice to share the code with i915, but need to > figure out how to abstract the stolen size and > dgpu/lmem stuff > > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > --- > drivers/gpu/drm/xe/display/intel_fbdev_fb.c | 11 +++++------ > 1 file changed, 5 insertions(+), 6 deletions(-) > > diff --git a/drivers/gpu/drm/xe/display/intel_fbdev_fb.c > b/drivers/gpu/drm/xe/display/intel_fbdev_fb.c > index f67bc0fd803b..62e1d176b07f 100644 > --- a/drivers/gpu/drm/xe/display/intel_fbdev_fb.c > +++ b/drivers/gpu/drm/xe/display/intel_fbdev_fb.c > @@ -24,12 +24,11 @@ bool intel_fbdev_fb_prefer_stolen(struct intel_display > *display, > if (!stolen) > return false; > > - /* > - * If the FB is too big, just don't use it since fbdev is not very > - * important and we should probably use that space with FBC or other > - * features. > - */ > - return stolen->size >= size * 2; > + if (size > stolen->size) > + return false; > + > + /* try to ensure FBC has enough stolen to do its job well */ > + return stolen->size - size >= > +intel_fbc_preferred_cfb_size(&xe->display); > } > > struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper, > -- > 2.44.2
