Date:   Thu, 16 May 2019 00:05:16 +0200
From:   Clément Péron <peron.clem@...il.com>
To:     Robin Murphy <robin.murphy@....com>
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        Mark Rutland <mark.rutland@....com>,
        devicetree <devicetree@...r.kernel.org>,
        David Airlie <airlied@...ux.ie>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4 0/8] Allwinner H6 Mali GPU support

Hi Robin,

On Tue, 14 May 2019 at 23:57, Robin Murphy <robin.murphy@....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@...il.com> wrote:
> >>
> >> Hi,
> >>
> >> On Tue, 14 May 2019 at 12:29, Neil Armstrong <narmstrong@...libre.com> wrote:
> >>>
> >>> Hi,
> >>>
> >>> On 13/05/2019 17:14, Daniel Vetter wrote:
> >>>> On Sun, May 12, 2019 at 07:46:00PM +0200, peron.clem@...il.com wrote:
> >>>>> From: Clément Péron <peron.clem@...il.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

Regards,
Clement

>
> Robin.

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