| Bug ID | 91789 |
|---|---|
| Summary | MST (multi stream) with Asus PQ321 drm_dp_calc_pbn_mode() fails |
| Product | DRI |
| Version | unspecified |
| Hardware | x86 (IA32) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | General |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | Peter.Blum@lxco.com |
If a Asus monitor PQ321 is used in MST mode it gets no signal. This is because the function drm_dp_calc_pbn_mode() in drm_dp_mst_topology.c returns a bad pixel bandwith number for the mode Modeline 131:"1920x2160" 60 297000 1920 2008 2052 2200 2160 2168 2178 2250 0x48 0x5 The function return 8 and not the correct value of 1063. Using simple u32 arithmetic in drm_dp_calc_pbn_mode() the monitor works fine. I'm not sure if unsigned 32 bit would overflow in some cases.
You are receiving this mail because:
- You are the assignee for the bug.
_______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
