On Fri, 11 Jun 2021 at 10:47, Daniel Vetter daniel@ffwll.ch wrote:
On Thu, Jun 10, 2021 at 02:36:59PM -0700, Dongwon Kim wrote:
Render clients should be able to create/destroy dumb object to import and use it as render buffer in case the default DRM device is different from the render device (i.e. kmsro).
Signed-off-by: Dongwon Kim dongwon.kim@intel.com
Uh no.
Well I know everyone just hacks around this, but the idea behind dumb buffer objects is that they're for kms scanout only. Furthermore on many drivers they allocate a limited resource like CMA memory. Handing that out like candy isn't a great idea.
And it's exactly those drivers that kmsro currently is used for where the display driver needs special memory.
Couldn't agree more. Perhaps we should add an inline comment and/or reference to a thread why?
-Emil