On 16.03.2018 10:36, Daniel Vetter wrote: > On Thu, Mar 15, 2018 at 11:45 AM, Thierry Reding > <thierry.reding@xxxxxxxxx> wrote: >> On Thu, Mar 15, 2018 at 04:00:25AM +0300, Dmitry Osipenko wrote: >>> Older Tegra's do not support RGBA format for the cursor, but instead >>> overlay plane could be used for it. Since there is no much use for the >>> overlays on a regular desktop and HW-accelerated cursor is much better >>> than a SW cursor, let's dedicate one overlay plane to the mouse cursor. >>> >>> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> >>> --- >>> drivers/gpu/drm/tegra/dc.c | 28 +++++++++++++++++++++++----- >>> 1 file changed, 23 insertions(+), 5 deletions(-) >> >> Applied. I'm not entirely happy that we need to sacrifice one of the >> overlay windows for this, but you're right, it's probably okay given >> how little planes are used on a regular desktop. >> >> We could always provide a module parameter to switch this on and off >> if that's ever something we want. > > The idea with universal planes is that you can (at least try to) use > the cursor overlay plane as a normal plane. It is only a hint to > userspace, there's no requirement anywhere in atomic that you only use > it as a cursor. That way desktops get a good hint for what the cursor > plane should be, everyone else can still use all the planes. Indeed, thank you for pointing at it. That is a nice feature. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
