| What | Removed | Added |
|---|---|---|
| CC | harry.wentland@amd.com | |
| Product | xorg | DRI |
| QA Contact | xorg-team@lists.x.org | |
| Component | Driver/AMDgpu | DRM/AMDgpu |
| Assignee | xorg-driver-ati@lists.x.org | dri-devel@lists.freedesktop.org |
Hi Carlo, please pass amdgpu.dc=3D1 module parameter or set CONFIG_DRM_AMD_DC_PRE_VEG= A flag at build. With this branch we decided to only enable it by default for Vega ASICs. Wi= th anything older than Vega you'll have to force enable it. Harry
Created a= ttachment 134643 [details] CONFIG_DRM_AMD_DC_PRE_VEGA kernel Oops (In reply to Harry Wentland from co= mment #1) > Hi Carlo, >=20 > please pass amdgpu.dc=3D1 module parameter or set CONFIG_DRM_AMD_DC_PR= E_VEGA > flag at build. This is interesting. When compiling with CONFIG_DRM_AMD_DC_PRE_VEGA I get a kernel Oops when connecting the HDMI cable, see the attached log. But (good news) if I revert https://cgit.freedesktop.org/~agd5f/linux/= commit/?id=3D8f5ed2ed31944eea5c2746ec66417afac043eabd I have no kernel Oops and HDMI works fine. So something is definitely wrong with that commit.
We've got a fix incoming in a day or two for that kernel oops = with the next set of DC patches.
Great, thank you. Any special reason why you decided to disable the DC support for pre-VEGA ASICs?
We want to avoid any regression since pre-Vega is already supp= orted by non-DC. Generally I have a lot more faith in DC but there could always be corner ca= ses. Vega is a new ASIC so by definition there won't be regressions (unless we m= ess with non-display stuff).
Harry, HDMI audio is not working for us on the non-DC driver o= n this hardware (AMD A10-9620P RADEON R5, 10 COMPUTE CORES 4C+6G). Are you saying non-DC sh= ould be working fine there?
Daniel, not working HDMI audio is a missing feature, not a regression. Not enabling= dc by default on older GPUs is to avoid regressions in working features. After some testing it will get enabled.
Got it. We have a number of affected systems here, so we will = help with testing efforts, reporting bugs and successes.
| What | Removed | Added |
|---|---|---|
| Status | NEW | RESOLVED |
| Resolution | --- | MOVED |
-- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this = link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/242.