Hi again, It seems I have missed two questions: On 11.12.2018 09:36, Andrzej Hajda wrote: > On 11.12.2018 09:01, Inki Dae wrote: >> 18. 12. 11. 오후 4:49에 Andrzej Hajda 이(가) 쓴 글: >>> On 11.12.2018 00:45, Inki Dae wrote: >>>> Hi Andrzej, >>>> >>>> 18. 12. 10. 오후 4:35에 Andrzej Hajda 이(가) 쓴 글: >>>>> Hi Inki, >>>>> >>>>> On 10.12.2018 03:25, Inki Dae wrote: >>>>>> Hi Andrzej, >>>>>> >>>>>> 18. 12. 6. 오후 6:38에 Andrzej Hajda 이(가) 쓴 글: >>>>>>> Hi Inki, >>>>>>> >>>>>>> This small patchset adds dynamic zpos support for DECON and FIMD. >>>>>> This patch will allow user space to change zpos. However, DECON and FIMD devices have fixed priority of HW overlays. >>>>>> This would mean that zpos change by user space doesn't guarantee correct HW overlay priority. >>>>>> >>>>>> Why do you want to support mutable zpos? >>>>> Practically you have patches which proves it works, you can see that >>>>> changing zpos value results in adequate change in displayed image. >>>>> >>>>> Conceptually it is just a matter of disconnecting hardware windows >>>>> present in DECON and FIMD from DRM planes which are software entities. >>>>> >>>>> You can reason about it this way: >>>>> >>>>> - drm plane is a framebuffer plus informations how it should be >>>>> transformed/displayed on DECON/FIMD, >>>>> >>>>> - hw window in DECON/FIMD is just a channel through which plane is send >>>>> to the display. >>>>> >>>>> DECON and FIMD has fixed hw windows order - windows with lower numbers >>>>> are displayed below windows with higher number. To display planes in >>>>> given z-order you just need to send them via windows with appropriate >>>>> index - farthest plane should go always via win0, closer one via win1, >>>>> ..., till the last plane. >>>>> >>>>> So for example if you have three planes and want to display them in >>>>> following order (first one farthest, last one closest): >>>>> >>>>> plane2, plane1, plane3 >>>>> >>>>> you should map them to planes as follow: >>>>> >>>>> plane2 -> win0, plane1 -> win1, plane3 -> win2 >>>>> >>>>> then for example plane2 is disabled, we will have following mapping: >>>>> >>>>> plane1 -> win0, plane3 -> win1, win2 - disabled >>>> Plane1 is displayed below Plane3. >>> And this is what we wanted, the initial order was: plane2, plane1, >>> plane3, first farthest (or lowest if you prefer this naming schema). >>> >>> >>>>> then if you change zorder of planes to: plane3, plane1: >>>>> >>>>> plane3 -> win0, plane1 -> win1 >>>> Plane3 is displayed below Plane1 because DECON/FIMD HW aren't able to change HW overlay priroty. >>> No, plane3 is displayed below plane1 because we sent it via win0, if we >>> want inverse we can send plane3 via win1 and plane1 via win0. >>> >>> >>>> However, user space wanted that Plane1 is displayed below Plane3. Like this, zpos change by user space doesn't guarantee correct HW overlay priority. >>> As I said before in this example userspace wanted plane3 below plane1, >>> and as I wrote in comment above any order of planes user want driver is >>> able to realize with this patch. >>> >>> >>>> And there is no any reason to change zpos in user space excepting Mixer device which supports HW overlay priority change. >>> Lack of special registry for manipulating windows order does not mean it >>> cannot support dynamic zpos. >>> >> Why changing zpos in user space is required? I didn't say it is required, but usually it is better if the driver supports more features than less. Regards Andrzej >> >>>> In fact, we supported mutable zpos before but changed it to immutable with same reason. >>> It was just broken if I remember correctly. >>> >> No, I worked well and real user used it I remember. I tried to find the code in git history, I have found some pre-atomic patches for zpos. It is not clear how it worked and why mutable zpos has been removed. Do you remember reasons? Regards Andrzej >> >>>> Lastly, your patch made real user broken. >>> Who? How? >> Window server of Tizen didn't work and you can test it with below image - I didn't check why it doesn't. Anyway, we don't have to break real user. >> http://download.tizen.org/snapshots/tizen/unified/latest/images/standard/mobile-wayland-armv7l-tm2/ > > Are you saying it works with latest mainline without my patches? > > > Regards > > Andrzej > > >> Thanks, >> Inki Dae >> >>> Regards >>> >>> Andrzej >>> >>> >>>> Thanks, >>>> Inki Dae >>>> >>>>> As you see there is no relation between plane number and window number, >>>>> but window number is equal to plane's position in zpos-ordered list of >>>>> planes and this is exact value of normalized_zpos field in drm_plane_state. >>>>> >>>>> >>>>> I hope this extended explanation will clarify things. >>>>> >>>>> >>>>> Regards >>>>> >>>>> Andrzej >>>>> >>>>> >>>>> >>>>>> Thanks, >>>>>> Inki Dae >>>>>> >>>>>>> It was tested on tm2 and trats2. >>>>>>> >>>>>>> Regards >>>>>>> Andrzej >>>>>>> >>>>>>> >>>>>>> Andrzej Hajda (3): >>>>>>> drm/exynos/decon5433: add dynamic zpos support >>>>>>> drm/exynos/fimd: create local helper for disabling hardware window >>>>>>> drm/exynos/fimd: add dynamic zpos support >>>>>>> >>>>>>> drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 23 +++++----- >>>>>>> drivers/gpu/drm/exynos/exynos_drm_fimd.c | 42 ++++++++----------- >>>>>>> 2 files changed, 29 insertions(+), 36 deletions(-) >>>>>>> >>> > > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
