Op 05-12-16 om 15:13 schreef ville.syrjala@xxxxxxxxxxxxxxx: > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > Each DSPARB register can house bits for two separate pipes, hence > we must protect the registers during reprogramming so that parallel > FIFO reconfigurations happening simultaneosly on multiple pipes won't > corrupt each others values. > > We'll use a new spinlock for this instead of the wm_mutex since we'll > have to move the DSPARB programming to happen from the vblank evade > critical section, and we can't use mutexes in there. > > v2: Document why we use a spinlock instead of a mutex (Maarten) > > Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
