[Bug 101929] [i965 cherryview] Modesetting does not support framebuffers greater then 4096x4096

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101929

            Bug ID: 101929
           Summary: [i965 cherryview] Modesetting does not support
                    framebuffers greater then 4096x4096
           Product: Mesa
           Version: 17.1
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: jan.burgmeier at unicon-software.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 132989
  --> https://bugs.freedesktop.org/attachment.cgi?id=132989&action=edit
lspci -vv

Hello,

if I try to use a resolution greater then 4096 in either direction the displays
stay black and the kernel logs:

[drm:drm_ioctl [drm]] pid=1986, dev=0xe200, auth=1, DRM_IOCTL_MODE_ADDFB
[drm:intel_framebuffer_init [i915]] tiled pitch (23040) must be at less than
16384
[drm:drm_internal_framebuffer_create [drm]] could not create framebuffer
[drm:drm_ioctl [drm]] ret = -22

>From the error message I assume that the stride is somehow wrong so I filled
the bug against mesa because the stride is calculated by mesa's 
"brw_bo_alloc_tiled".

The maximum allowed stride is set in the kernel and is hardware dependent so
this may only occur on cherryview.

xrandr with modesetting says the maximum framebuffer is 8192x8192 and when
using the intel driver and SNA acceleration it is working. So the hardware
should support a greater resolution.

System spec:
Kernel: 4.9.30 32Bit
Mesa: 17.1.1
libdrm: 2.4.81
Xorg: 1.19.3

Best regards
Jan Burgmeier

-- 
You are receiving this mail because:
You are the assignee for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-3d-bugs/attachments/20170726/78c6fddd/attachment.html>