On Tue, Feb 02, 2016 at 10:06:51PM -0800, Matt Roper wrote: > Due to our lack of two-step watermark programming, our driver has > historically pretended that the cursor plane is always on for the > purpose of watermark calculations; this helps avoid serious flickering > when the cursor turns off/on (e.g., when the user moves the mouse > pointer to a different screen). That workaround was accidentally > dropped as we started working toward atomic watermark updates. Since we > still aren't quite there yet with two-stage updates, we need to > resurrect the workaround and treat the cursor as always active. > > v2: Tweak cursor width calculations slightly to more closely match the > logic we used before the atomic overhaul began. (Ville) > > Cc: simde...@outlook.com > Cc: manfred.kitzbich...@gmail.com > Reported-by: simde...@outlook.com > Reported-by: manfred.kitzbich...@gmail.com > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93892 > Fixes: 43d59eda1 ("drm/i915: Eliminate usage of plane_wm_parameters from > ILK-style WM code (v2)") > Signed-off-by: Matt Roper <matthew.d.ro...@intel.com> > --- > drivers/gpu/drm/i915/intel_pm.c | 15 ++++++++++----- > 1 file changed, 10 insertions(+), 5 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index 31bc4ea..5888632 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -1799,16 +1799,21 @@ static uint32_t ilk_compute_cur_wm(const struct > intel_crtc_state *cstate, > const struct intel_plane_state *pstate, > uint32_t mem_value) > { > - int cpp = pstate->base.fb ? > - drm_format_plane_cpp(pstate->base.fb->pixel_format, 0) : 0; > + /* > + * We treat the cursor plane as always-on for the purposes of watermark > + * calculation. Until we have two-stage watermark programming merged, > + * this is necessary to avoid flickering. > + */ > + int cpp = 4; > + int width = pstate->visible ? pstate->base.crtc_w : 64; > > - if (!cstate->base.active || !pstate->visible) > + if (!cstate->base.active) > return 0; > > +
Stray whitespace. Otherwise lgtm Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com> > return ilk_wm_method2(ilk_pipe_pixel_rate(cstate), > cstate->base.adjusted_mode.crtc_htotal, > - drm_rect_width(&pstate->dst), > - cpp, mem_value); > + width, cpp, mem_value); > } > > /* Only for WM_LP. */ > -- > 2.1.4 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Ville Syrjälä Intel OTC _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
