Op 19-12-16 om 13:08 schreef Archit Taneja: > This code has been more or less picked up from the vc4 and intel > implementations of update_plane() funcs for cursor planes. > > The update_plane() func is usually the drm_atomic_helper_update_plane > func that will issue an atomic commit with the plane updates. Such > commits are not intended to be done faster than the vsync rate. > > The legacy cursor userspace API, on the other hand, expects the kernel > to handle cursor updates immediately. > > Create a fast path in update_plane, which updates the cursor registers > and flushes the configuration. The fast path is taken when there is only > a change in the cursor's position in the crtc, or a change in the > cursor's crop co-ordinates. For anything else, we go via the slow path. > > We take the slow path even whenever the fb changes, and even when there > is currently no fb tied to the plane. This should hopefully ensure that > we always take a slow path for every new fb. The slow path will ensure > that the fb is prepared/pinned etc. > > Cc: > Signed-off-by: Archit Taneja <architt@xxxxxxxxxxxxxx> > --- > - Don't know what to do for locking here :/ Shouldn't patch 9 be done first before 8? ~Maarten -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
