PVR usabilty/stability on 5.9 about linux

[xc-racer99]

Odd, it looks like the PVR driver is freezing up. I wonder if there's some clock issue with my forward porting.

Do you have a link to the fedora you're using? I'd like to try it out when I have a chance. May not be soon as I don't have as much free time as I used to.

[kwizart]

I will probably rebase on fedora 33 that can be downloaded from https://arm.fedoraproject.org/
I recommend to pick the Fedora Minimal (under the Server tab), because others spins default to btrfs which is too ambitious for my use case.

For Fedora 31, I've used the LXDE Spin, at:
https://download.fedoraproject.org/pub/fedora/linux/releases/31/Spins/Fedora-LXDE-armhfp-31-1.9-sda.raw.xz

IIRC, I've bootstrapped the install on another device to setup the hostname, wifi , disable selinux and remote access, then installed the dracut-config-generic package to create a generic initramfs from foreign host that can be consumed by the galaxys.

[xc-racer99]

Ok, I've been able to reproduce this. Looks like we need to change a build option, as per https://lists.goldelico.com/pipermail/openpvrsgx-devgroup/2020-November/000449.html

Untested, but fixes the same issue as seen on OMAP4.

[xc-racer99]

I can now confirm that adding -DPVR_LINUX_MEM_AREA_USE_VMAP to the build options does indeed fix things. Kmscube is now working again.

Patch as per @tmlind

diff --git a/drivers/gpu/drm/pvrsgx/1.17.4948957/eurasia_km/Makefile b/drivers/gpu/drm/pvrsgx/1.17.4948957/eurasia_km/Makefile
index fb5507bf5ba31..fdca642a9c3e2 100644
--- a/drivers/gpu/drm/pvrsgx/1.17.4948957/eurasia_km/Makefile
+++ b/drivers/gpu/drm/pvrsgx/1.17.4948957/eurasia_km/Makefile
@@ -117,6 +117,7 @@ ccflags-y += \
 	-DLDM_PLATFORM \
 	-DSUPPORT_SGX_EVENT_OBJECT \
 	-DPVR2D_ALT_2DHW \
+	-DPVR_LINUX_MEM_AREA_USE_VMAP \
 	-DSUPPORT_SGX_HWPERF \
 	-DSUPPORT_SGX_LOW_LATENCY_SCHEDULING \
 	-DSUPPORT_LINUX_X86_PAT \

Going to close this issue as that should resolve it. Looks like I won't need to setup a Fedora install after all :)

[kwizart]

Confirmed, kmscube works like a charm. Thanks!
glmark2-es2-drm

=======================================================
    glmark2 2017.07
=======================================================
    OpenGL Information
    GL_VENDOR:     Imagination Technologies
    GL_RENDERER:   PowerVR SGX 540
    GL_VERSION:    OpenGL ES 2.0 build 1.17@4948957
=======================================================
 [ ...]
                                  glmark2 Score: 38 
=======================================================