Hi Frieder,

Am Montag, den 14.12.2020, 13:33 +0100 schrieb Frieder Schrempf:

Hi Lucas, hi Marek,

while doing some tests on i.MX8MM with Etnaviv and mxsfb-drm (using the patches for DSIM, GPC, BLK-CTL, etc., see branch at [1]), I noticed that I don't seem to be able to run glmark2:

~# glmark2-es2-drm

glmark2 2017.07

OpenGL Information      GL_VENDOR: etnaviv      GL_RENDERER: Vivante GC600 rev 4653      GL_VERSION: OpenGL ES 2.0 Mesa 20.2.4 ======================================================= [build] use-vbo=false:Error: Failed to create FB: -22 Segmentation fault

Running a Qt application with the eglfs_kms backend produces a similar error, while running kmscube or applications without GPU rendering works fine.

What am I missing? When I used imx-drm, I didn't have any such issues. How is mxsfb-drm different?

This could have multiple rot causes. First, please make sure that you have sufficient CMA memory. Also the eLCDIF hardware has some unfortunate restrictions on buffer stride, which surfaced a bug in the etnaviv buffer layout code also on some very common display resolutions. Please make sure you have [1] applied to get rid of this bug.

Regards, Lucas

[1] https://cgit.freedesktop.org/mesa/mesa/commit/?id=3862cec314de4a82821d9694ae...