Re: [PATCH v4 0/8] Allwinner H6 Mali GPU support

[Rob Herring <rob.e.herring@gmail.com>]

On Wed, May 15, 2019 at 5:06 PM Clément Péron <peron.clem@gmail.com> wrote:
>
> Hi Robin,
>
> On Tue, 14 May 2019 at 23:57, Robin Murphy <robin.murphy@arm.com> wrote:
> >
> > On 2019-05-14 10:22 pm, Clément Péron wrote:
> > > Hi,
> > >
> > > On Tue, 14 May 2019 at 17:17, Clément Péron <peron.clem@gmail.com> wrote:
> > >>
> > >> Hi,
> > >>
> > >> On Tue, 14 May 2019 at 12:29, Neil Armstrong <narmstrong@baylibre.com> wrote:
> > >>>
> > >>> Hi,
> > >>>
> > >>> On 13/05/2019 17:14, Daniel Vetter wrote:
> > >>>> On Sun, May 12, 2019 at 07:46:00PM +0200, peron.clem@gmail.com wrote:
> > >>>>> From: Clément Péron <peron.clem@gmail.com>
> > >>>>>
> > >>>>> Hi,
> > >>>>>
> > >>>>> The Allwinner H6 has a Mali-T720 MP2. The drivers are
> > >>>>> out-of-tree so this series only introduce the dt-bindings.
> > >>>>
> > >>>> We do have an in-tree midgard driver now (since 5.2). Does this stuff work
> > >>>> together with your dt changes here?
> > >>>
> > >>> No, but it should be easy to add.
> > >> I will give it a try and let you know.
> > > Added the bus_clock and a ramp delay to the gpu_vdd but the driver
> > > fail at probe.
> > >
> > > [    3.052919] panfrost 1800000.gpu: clock rate = 432000000
> > > [    3.058278] panfrost 1800000.gpu: bus_clock rate = 100000000
> > > [    3.179772] panfrost 1800000.gpu: mali-t720 id 0x720 major 0x1
> > > minor 0x1 status 0x0
> > > [    3.187432] panfrost 1800000.gpu: features: 00000000,10309e40,
> > > issues: 00000000,21054400
> > > [    3.195531] panfrost 1800000.gpu: Features: L2:0x07110206
> > > Shader:0x00000000 Tiler:0x00000809 Mem:0x1 MMU:0x00002821 AS:0xf
> > > JS:0x7
> > > [    3.207178] panfrost 1800000.gpu: shader_present=0x3 l2_present=0x1
> > > [    3.238257] panfrost 1800000.gpu: Fatal error during GPU init
> > > [    3.244165] panfrost: probe of 1800000.gpu failed with error -12
> > >
> > > The ENOMEM is coming from "panfrost_mmu_init"
> > > alloc_io_pgtable_ops(ARM_MALI_LPAE, &pfdev->mmu->pgtbl_cfg,
> > >                                           pfdev);
> > >
> > > Which is due to a check in the pgtable alloc "cfg->ias != 48"
> > > arm-lpae io-pgtable: arm_mali_lpae_alloc_pgtable cfg->ias 33 cfg->oas 40
> > >
> > > DRI stack is totally new for me, could you give me a little clue about
> > > this issue ?
> >
> > Heh, this is probably the one bit which doesn't really count as "DRI stack".
> >
> > That's merely a somewhat-conservative sanity check - I'm pretty sure it
> > *should* be fine to change the test to "cfg->ias > 48" (io-pgtable
> > itself ought to cope). You'll just get to be the first to actually test
> > a non-48-bit configuration here :)
>
> Thanks a lot, the probe seems fine now :)
>
> I try to run glmark2 :
> # glmark2-es2-drm
> =======================================================
>     glmark2 2017.07
> =======================================================
>     OpenGL Information
>     GL_VENDOR:     panfrost
>     GL_RENDERER:   panfrost
>     GL_VERSION:    OpenGL ES 2.0 Mesa 19.1.0-rc2
> =======================================================
> [build] use-vbo=false:
>
> But it seems that H6 is not so easy to add :(.
>
> [  345.204813] panfrost 1800000.gpu: mmu irq status=1
> [  345.209617] panfrost 1800000.gpu: Unhandled Page fault in AS0 at VA
> 0x0000000002400400
> [  345.209617] Reason: TODO
> [  345.209617] raw fault status: 0x800002C1
> [  345.209617] decoded fault status: SLAVE FAULT
> [  345.209617] exception type 0xC1: TRANSLATION_FAULT_LEVEL1
> [  345.209617] access type 0x2: READ
> [  345.209617] source id 0x8000
> [  345.729957] panfrost 1800000.gpu: gpu sched timeout, js=0,
> status=0x8, head=0x2400400, tail=0x2400400, sched_job=000000009e204de9
> [  346.055876] panfrost 1800000.gpu: mmu irq status=1
> [  346.060680] panfrost 1800000.gpu: Unhandled Page fault in AS0 at VA
> 0x0000000002C00A00
> [  346.060680] Reason: TODO
> [  346.060680] raw fault status: 0x810002C1
> [  346.060680] decoded fault status: SLAVE FAULT
> [  346.060680] exception type 0xC1: TRANSLATION_FAULT_LEVEL1
> [  346.060680] access type 0x2: READ
> [  346.060680] source id 0x8100
> [  346.561955] panfrost 1800000.gpu: gpu sched timeout, js=1,
> status=0x8, head=0x2c00a00, tail=0x2c00a00, sched_job=00000000b55a9a85
> [  346.573913] panfrost 1800000.gpu: mmu irq status=1
> [  346.578707] panfrost 1800000.gpu: Unhandled Page fault in AS0 at VA
> 0x0000000002C00B80
> [  346.578707] Reason: TODO
> [  346.578707] raw fault status: 0x800002C1
> [  346.578707] decoded fault status: SLAVE FAULT
> [  346.578707] exception type 0xC1: TRANSLATION_FAULT_LEVEL1
> [  346.578707] access type 0x2: READ
> [  346.578707] source id 0x8000
> [  347.073947] panfrost 1800000.gpu: gpu sched timeout, js=0,
> status=0x8, head=0x2c00b80, tail=0x2c00b80, sched_job=00000000cf6af8e8
> [  347.104125] panfrost 1800000.gpu: mmu irq status=1
> [  347.108930] panfrost 1800000.gpu: Unhandled Page fault in AS0 at VA
> 0x0000000002800900
> [  347.108930] Reason: TODO
> [  347.108930] raw fault status: 0x810002C1
> [  347.108930] decoded faultn thi status: SLAVE FAULT
> [  347.108930] exception type 0xC1: TRANSLATION_FAULT_LEVEL1
> [  347.108930] access type 0x2: READ
> [  347.108930] source id 0x8100
> [  347.617950] panfrost 1800000.gpu: gpu sched timeout, js=1,
> status=0x8, head=0x2800900, tail=0x2800900, sched_job=000000009325fdb7
> [  347.629902] panfrost 1800000.gpu: mmu irq status=1
> [  347.634696] panfrost 1800000.gpu: Unhandled Page fault in AS0 at VA
> 0x0000000002800A80

Is this 32 or 64 bit userspace? I think 64-bit does not work with
T7xx. You might need this[1]. You may also be the first to try T720,
so it could be something else.

Rob

[1] https://gitlab.freedesktop.org/mesa/mesa/merge_requests/650