Re: [linux-sunxi] Re: [PATCH v3 10/12] arm64: dts: allwinner: h6: Add IR receiver node

From: ClÃment PÃron
Date: Tue Jun 04 2019 - 11:08:20 EST

Hi Ondrej,

On Tue, 4 Jun 2019 at 16:47, OndÅej Jirman <megous@xxxxxxxxxx> wrote:
>
> Hi ClÃment,
>
> On Tue, Jun 04, 2019 at 02:33:55PM +0200, verejna wrote:
> > Hi ClÃment,
> >
> > On Mon, Jun 03, 2019 at 09:58:23PM +0200, ClÃment PÃron wrote:
> > > Hi Ondrej,
> > >
> > > On Fri, 31 May 2019 at 14:46, OndÅej Jirman <megous@xxxxxxxxxx> wrote:
> > > >
> > > > Hello ClÃment,
> > > >
> > > > On Fri, May 31, 2019 at 12:25:32AM +0200, ClÃment PÃron wrote:
> > > > > Hi Ondrej,
> > > > >
> > > > > On Thu, 30 May 2019 at 16:55, OndÅej Jirman <megous@xxxxxxxxxx> wrote:
> > > > > >
> > > > > > Hello ClÃment,
> > > > > >
> > > > > > On Tue, May 28, 2019 at 06:14:38PM +0200, ClÃment PÃron wrote:
> > > > > > > Allwinner H6 IR is similar to A31 and can use same driver.
> > > > > > >
> > > > > > > Add support for it.
> > > > > > >
> > > > > > > Signed-off-by: ClÃment PÃron <peron.clem@xxxxxxxxx>
> > > > > > > ---
> > > > > > > arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 19 +++++++++++++++++++
> > > > > > > 1 file changed, 19 insertions(+)
> > > > > > >
> > > > > > > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
> > > > > > > index 16c5c3d0fd81..649cbdfe452e 100644
> > > > > > > --- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
> > > > > > > +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
> > > > > > > @@ -647,6 +647,25 @@
> > > > > > > pins = "PL0", "PL1";
> > > > > > > function = "s_i2c";
> > > > > > > };
> > > > > > > +
> > > > > > > + r_ir_rx_pin: r-ir-rx-pin {
> > > > > > > + pins = "PL9";
> > > > > > > + function = "s_cir_rx";
> > > > > > > + };
> > > > > > > + };
> > > > > > > +
> > > > > > > + r_ir: ir@7040000 {
> > > > > > > + compatible = "allwinner,sun50i-h6-ir",
> > > > > > > + "allwinner,sun6i-a31-ir";
> > > > > > > + reg = <0x07040000 0x400>;
> > > > > > > + interrupts = <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>;
> > > > > > > + clocks = <&r_ccu CLK_R_APB1_IR>,
> > > > > > > + <&r_ccu CLK_IR>;
> > > > > > > + clock-names = "apb", "ir";
> > > > > > > + resets = <&r_ccu RST_R_APB1_IR>;
> > > > > > > + pinctrl-names = "default";
> > > > > > > + pinctrl-0 = <&r_ir_rx_pin>;
> > > > > > > + status = "disabled";
> > > > > > > };
> > > > > >
> > > > > > Please make a comment here, that this is known broken on some boards and may
> > > > > > result IRQ flood if enabled. Otherwise noone will know.
> > > > >
> > > > > I'm planning to send a v4 next week with the IRQ_NONE return as Maxime
> > > > > suggested it.
> > > > > https://github.com/clementperon/linux/tree/h6_ir_v4
> > > > >
> > > > > But maybe we could also use the bit 5 of the IRQ status.
> > > >
> > > > Thanks, that's nice, but that will not make the HW work. That will just disable
> > > > it. The comment is still necessary.
> > > I have pushed a new version on my github.
> > > https://github.com/clementperon/linux/commits/h6_ir_v4
> > >
> > > I will submit it, if you are ok with it.
> >
> > the changes make it worse. Console is flooded with "Temporarily disable IRQ"
> > and other symptoms are the same as I described before. Interrupts are not
> > disabled in a any reasonable time. (I've waited for more > 5mins already.)
> >
> > You probably need to disable interrupts right away, not wait for 100k failures.
>
> Hmm, this is what the registers look like post-probe:
>
> R_CIR:
> 0x07040000 : 00000030
> 0x07040004 : 00000030
> 0x07040008 : 00000030
> 0x0704000c : 00000030
> 0x07040010 : 00000030
> 0x07040014 : 00000030
> 0x07040018 : 00000030
> 0x0704001c : 00000030
> 0x07040020 : 00000030
> 0x07040024 : 00000030
> 0x07040028 : 00000030
> 0x0704002c : 00000030
> 0x07040030 : 00000030
> 0x07040034 : 00000030
> 0x07040038 : 00000030
> 0x0704003c : 00000030
> 0x07040040 : 00000030
> 0x07040044 : 00000030
> 0x07040048 : 00000030
> 0x0704004c : 00000030
> 0x07040050 : 00000030
> 0x07040054 : 00000030
> 0x07040058 : 00000030
> 0x0704005c : 00000030
> 0x07040060 : 00000030
> 0x07040064 : 00000030
> 0x07040068 : 00000030
> 0x0704006c : 00000030
> 0x07040070 : 00000030
> 0x07040074 : 00000030
> 0x07040078 : 00000030
> 0x0704007c : 00000030
> 0x07040080 : 00000030
> 0x07040084 : 00000030
> 0x07040088 : 00000030
> 0x0704008c : 00000030
> 0x07040090 : 00000030
> 0x07040094 : 00000030
> 0x07040098 : 00000030
> 0x0704009c : 00000030
> 0x070400a0 : 00000030
> 0x070400a4 : 00000030
> 0x070400a8 : 00000030
> 0x070400ac : 00000030
> 0x070400b0 : 00000030
> 0x070400b4 : 00000030
> 0x070400b8 : 00000030
> 0x070400bc : 00000030
> 0x070400c0 : 00000030
> 0x070400c4 : 00000030
> 0x070400c8 : 00000030
> 0x070400cc : 00000030
> 0x070400d0 : 00000030
> 0x070400d4 : 00000030
> 0x070400d8 : 00000030
> 0x070400dc : 00000030
> 0x070400e0 : 00000030
> 0x070400e4 : 00000030
> 0x070400e8 : 00000030
> 0x070400ec : 00000030
> 0x070400f0 : 00000030
> 0x070400f4 : 00000030
> 0x070400f8 : 00000030
> 0x070400fc : 00000030
>
> Clearly not right. It's just the R_CIR module, other modules have normal values.
>
> I've checked:
> 0x070101c0 : 81000002
> (IR clock config register)
> 0x070101cc : 00010000
> (IR reset/bus clk gate reg)
>
> static const char * const r_mod0_default_parents[] = { "osc32k", "osc24M" };
> static SUNXI_CCU_MP_WITH_MUX_GATE(ir_clk, "ir",
> r_mod0_default_parents, 0x1c0,
> 0, 5, /* M */
> 8, 2, /* P */
> 24, 1, /* mux */
> BIT(31), /* gate */
> 0);
>
> static SUNXI_CCU_GATE(r_apb1_ir_clk, "r-apb1-ir", "r-apb1",
> 0x1cc, BIT(0), 0);
>
> [RST_R_APB1_IR] = { 0x1cc, BIT(16) },
>
> So parent clock seems to be OK. But gate clock is not enabled, so the bus
> is not working.
>
> And look at this!!:
>
> static SUNXI_CCU_GATE(r_apb1_ir_clk, "r-apb1-ir", "r-apb1",
> 0x1cc, BIT(0), 0);
> static SUNXI_CCU_GATE(r_apb1_w1_clk, "r-apb1-w1", "r-apb1",
> 0x1cc, BIT(0), 0);
>
> So, it's wrong w1 gate config!
>
> You can drop your changes, because I've probbably found the root cause.

Nice to see that you have found the issue, but I don't understand why
It's working on my board on not on yours.

Regards,
ClÃment

>
> regards,
> o.
>
> > thank you and regards,
> > o.
> >
> > > Thanks,
> > > ClÃment
> > >
> > > >
> > > > thank you,
> > > > o.
> > > >
> > > > > Regards, Clement
> > > > >
> > > > > >
> > > > > > thanks,
> > > > > > o.
> > > > > >
> > > > > > > r_i2c: i2c@7081400 {
> > > > > > > --
> > > > > > > 2.20.1
> > > > > > >
> > > > > > >
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