On Fri, Jun 26, 2015 at 07:08:40PM +0200, Daniel Vetter wrote: > On Fri, Jun 26, 2015 at 07:21:53PM +0530, Ramalingam C wrote: > > If crtc is in clone mode, DRRS will be disabled. Because if the both > > the displays are not sharing the same vrefresh, then userspace > > activities based on vsync will go for toss. > > > > Clone mode will be rechecked on every restarting Idleness DRRS events. > > > > Signed-off-by: Ramalingam C <ramalinga...@intel.com> > > --- > > drivers/gpu/drm/i915/intel_drrs.c | 36 > > +++++++++++++++++++++++++++++++++++- > > 1 file changed, 35 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/i915/intel_drrs.c > > b/drivers/gpu/drm/i915/intel_drrs.c > > index e5d8bcd..42b420d 100644 > > --- a/drivers/gpu/drm/i915/intel_drrs.c > > +++ b/drivers/gpu/drm/i915/intel_drrs.c > > @@ -16,6 +16,7 @@ > > > > #include <drm/i915_drm.h> > > #include <linux/delay.h> > > +#include <linux/list.h> > > > > #include "i915_drv.h" > > #include "intel_drv.h" > > @@ -85,6 +86,31 @@ int get_free_drrs_struct_index(struct drm_i915_private > > *dev_priv) > > return -EBUSY; > > } > > > > +/* > > + * TODO: This is identifying the multiple active crtcs at a time. > > + * Here we assume that this is clone state and disable DRRS. > > + * But need to implement a proper method to find the real cloned mode > > + * state. DRRS need not be disabled incase of multiple crtcs with > > + * different content. > > + */ > > This is a pretty big hack. Why do you need it? fb tracking should keep any > display in the high mode as long as there's activity, so as long as > userspace flips both buffers for both pipes (which is should for cloned > mode) they'll both be running at max.
It's simpler than than: cloned mode == 1 pipe, 1 framebuffer, 1 pageflip. Does having a vblank_ref count as activity? There is a large body of code (like OML_sync_control) that assumes a fixed refresh rate for an output. (Though OML_sync_control is vague about multiple monitor setups and ignore mode changed altogether.) -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
