On Tue, Jan 23, 2024 at 05:44:06PM -0500, Rodrigo Vivi wrote: > On Tue, Jan 23, 2024 at 11:02:44AM +0200, Ville Syrjala wrote: > > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > > > Only display workarounds 0391 and 0475 call for disabling > > FBC with render compression, and those are listed only for > > pre-prod SKL steppings. So it should be safe to enable > > FB+CCS on production hardware. > > > > AFAIK CCS is limited to 50% bandwidth reduction (perhaps > > clear color can do better?). FBC can exceed that number > > by quite a bit, given the right kind of framebuffer > > contents. So piling on both kinds of compressions could > > still make sense. > > yeap, I think so. > The risk is to hit a workaround that is not ducumented in the BSpec > cases after gen11... > > Uma, do you recall having seen lately any workaround with FBC > and render compression? > > > > > Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/10125 > > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > --- > > drivers/gpu/drm/i915/display/intel_fbc.c | 13 +------------ > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c > > index f17a1afb4929..b453fcbd67da 100644 > > --- a/drivers/gpu/drm/i915/display/intel_fbc.c > > +++ b/drivers/gpu/drm/i915/display/intel_fbc.c > > @@ -1087,18 +1087,7 @@ static bool i8xx_fbc_tiling_valid(const struct intel_plane_state *plane_state) > > > > static bool skl_fbc_tiling_valid(const struct intel_plane_state *plane_state) > > { > > - const struct drm_framebuffer *fb = plane_state->hw.fb; > > - > > - switch (fb->modifier) { > > - case DRM_FORMAT_MOD_LINEAR: > > - case I915_FORMAT_MOD_Y_TILED: > > - case I915_FORMAT_MOD_Yf_TILED: > > - case I915_FORMAT_MOD_4_TILED: > > - case I915_FORMAT_MOD_X_TILED: > > - return true; > > - default: > > - return false; > > - } > > + return true; > > we could also simply kill this function... the compiler does the right thing, > but users navigating on the code needs to do an extra ctag/cscope inspections > to see that it is a simple return. But well, the code do gets prettier with > the function :) I've been thinking of converting a bunch of this stuff to vfuncs, so keeping the function around in anticipation of that seemed semi-reasonable. > So, up to you: > > Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Thanks. > > > } > > > > static bool tiling_is_valid(const struct intel_plane_state *plane_state) > > -- > > 2.43.0 > > -- Ville Syrjälä Intel
