|Summary:||[HSW, regression, bisected] numerous Sascha demos render incorrectly|
|Product:||Mesa||Reporter:||Nanley Chery <nanleychery>|
|Component:||Drivers/Vulkan/intel||Assignee:||Jordan Justen <jljusten>|
|Status:||RESOLVED FIXED||QA Contact:||Intel 3D Bugs Mailing List <intel-3d-bugs>|
|i915 platform:||i915 features:|
|Attachments:||Incorrectly rendered demo|
Description Nanley Chery 2016-03-09 19:40:38 UTC
Created attachment 122184 [details] Incorrectly rendered demo On Gen7, and prior the following commit: commit 248ab61740c4082517424f5aa94b2f4e7b210d76 Author: Jason Ekstrand <email@example.com> Date: Tue Mar 8 17:10:05 2016 -0800 anv/cmd_buffer: Pull the core of flush_state into genX_cmd_buffer the Sascha Willems vulkanscene demo was rendering correctly. Now however, a gray oval is rendered in the middle of the demo. Reference: https://github.com/SaschaWillems/Vulkan/blob/master/screenshots/vulkan_scene.png
Comment 1 Nanley Chery 2016-03-09 21:32:30 UTC
With further testing, I've determined that a number of demos besides vulkanscene are affected.
Comment 2 Jason Ekstrand 2016-03-09 22:19:25 UTC
Turns out that the problem is that calling cmd_buffer_config_l3 isn't safe to do when rendering on gen7. We need to fix that. Re-assigning to Jordan.
Comment 3 Jason Ekstrand 2016-03-12 16:59:08 UTC
I just pushed a band-aid patch that doesn't actually solve the problem but does get it back to working as well as it did before: commit 41af9b2e517dd0c17e519490ca915b96f6898390 Author: Jason Ekstrand <firstname.lastname@example.org> Date: Sat Mar 12 08:54:41 2016 -0800 HACK: Don't re-configure L3$ in render stages pre-BDW This fixes a "regression" on Haswell and prior caused by merging the gen7 and gen8 flush_state functions. Haswell should still work just fine if you're on a 4.4 kernel, but we really should make it detect the command parser version and do something intelligent.
Comment 4 Jordan Justen 2016-03-12 23:42:37 UTC
I've tried (unsuccessfully) to reproduce this on two Haswell systems. Device: Mesa DRI Intel(R) Haswell Mobile (0xa26) Device: Mesa DRI Intel(R) Haswell Mobile (0xa2e)
Comment 5 Lionel Landwerlin 2016-05-10 21:06:52 UTC
I've had a similar problem with the vkcube demo (https://github.com/krh/vkcube) on my MacBook Air HSW : https://bugs.freedesktop.org/show_bug.cgi?id=95139 I wonder whether that's the same issue. Interestingly enough the cube demo from https://github.com/LunarG/VulkanTools.git works. My system : Device: Mesa DRI Intel(R) Haswell Mobile (0xa26)
Comment 6 Jordan Justen 2016-05-17 20:13:17 UTC
Jason had a workaround patch to fix this previously, but hopefully it is fixed without the workaround as of 6c9f35bb73ca69b75cb40fc96c41717806fc74da.