Hi Martin, On 1 August 2018 at 15:24, Martin Fuzzey <martin.fuzzey@flowbird.group> wrote: > Hi, > > I am running into the same problem using etnaviv on i.MX6 under Android 8.1 > > The mesa etnaviv code uses CREATE_DUMB / MAP_DUMB for the scanout buffers > and is called from the surfaceflinger process. > > But, under Android 8.1 drm_hwcomposer runs in a seperate process to > surfaceflinger. > Since drm_hwcomposer needs to use the KMS API it must be the DRM master, > that means that surface flinger cannot be DRM master too. > > Adding a render node to the imx drm device and configuring mesa to user > fixes > the problem but requires the render node to have access rights to use > CREATE_DUMB > / MAP_DUMB. > > > Here is my full patch: > > Make imx-drm export a render node so that mesa can use it to allocate > Let's start with the not-so obvious question: Why does one open the imx as render node? Of the top of my head: There is nothing in egl/android that should require an authenticated device. Hence, using a card node should be fine - the etnaviv code opens the render node it needs. It's been a while since I looked at the imx/etna code, so I may be missing something. HTH Emil _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
