On 2018-12-21 9:45 a.m., Deng, Emily wrote: >> -----Original Message----- >> From: Michel Dänzer <michel@xxxxxxxxxxx> >> Sent: Friday, December 21, 2018 4:38 PM >> To: Deng, Emily <Emily.Deng@xxxxxxx> >> Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx >> Subject: Re: [PATCH] drm/amdgpu/virtual_dce: Need to pin the fb's bo >> >> On 2018-12-21 8:26 a.m., Emily Deng wrote: >>> When the bo is used to set mode, the bo need to be pinned. >> >> On second thought, why does the BO need to be pinned? When using the display >> hardware, the BO needs to be pinned to prevent it from being moved while the >> hardware is scanning out from it, but that shouldn't be necessary here. > The pin here is used for scan out the buffer by remote display app. I still don't understand why pinning is needed. What mechanism does the remote display app use to access the BO contents? -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
