[BUG] dw-mipi-dsi-rockchip display corruption with dsi panel

Peter Geis pgwipeout at gmail.com
Tue Aug 10 16:46:50 PDT 2021


On Tue, Aug 10, 2021 at 7:11 PM Heiko Stübner <heiko at sntech.de> wrote:
>
> Hi Peter,
>
> Am Mittwoch, 11. August 2021, 00:31:24 CEST schrieb Peter Geis:
> > Good Evening,
> >
> > I've been attempting to light off the feiyang fy07024di26a30d panel on
> > the rockpro64. This is the official panel from the Pine64 store.
> > I've confirmed it works with the downstream kernel on both the rk3399
> > and rk3566, but on the mainline driver the display is partially
> > corrupted (see attached photo: [1]).
> >
> > As you can see, the left half of the display is fine, but the right half
> > of the display is corrupted with the pixels smearing horizontally.
> >
> > I saw when the panel was added, some additional code was added to
> > handle burst mode in the sun6_mipi_dsi driver [2].
> > I've seen that the dw-mipi-dsi driver appears to already support burst
> > mode and I can't find anything out of place there.
> > I also haven't had much success finding anything obviously different in
> > the downstream driver vs the upstream driver that would explain this.
> >
> > Attached below is the in-progress dts changes for an example of how the
> > panel is plugged in.
>
> is that really a dual-dsi panel needing two dsi controllers to drive it?
>
> With that tiny resultion of 1024x600 I definitly wouldn't expect this,
> in contrast to say the 2048x1536 dual-dsi displays used in the
> Gru-Scarlet ChromeOS tablets.
>
> So maybe just drop the 2nd dsi controller connection in a first step?
> Because I really don't think that is the case on the hardware.
>
> The dual-dsi setup means that you have one vop supplying half of its
> display data to each of the 2 involved dsi controllers. And you're missing
> in fact half of your display data.

Thanks, that was it.
I had tried removing the link previously, but I had to also disable
that controller altogether or the vop fails to probe silently.

That is a common issue I ran into when getting this all set up,
anything failed to probe for the dsi panel the vop just silently dies
in the background and graphics fail everywhere.

>
>
> Heiko
>
>
>
> > I admit, I have little understanding of the mipi-dsi internal workings,
> > so I'm reaching out to the experts on how to correct this.
> >
> > Thank you for your time,
> > Peter Geis
> >
> > [1] https://photos.app.goo.gl/LBA9M2WcweGaEb4cA
> > [2] https://patchwork.kernel.org/project/linux-arm-kernel/cover/20181116163916.29621-1-jagan@amarulasolutions.com/
> >
> > diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
> > index 687a5afa5d2c..af55a30297ae 100644
> > --- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
> > +++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
> > @@ -20,6 +20,13 @@ chosen {
> >               stdout-path = "serial2:1500000n8";
> >       };
> >
> > +     backlight: backlight {
> > +             compatible = "pwm-backlight";
> > +             pwms = <&pwm0 0 1000000 0>;
> > +             brightness-levels = <0 4 8 16 32 64 128 255>;
> > +             default-brightness-level = <128>;
> > +     };
> > +
> >       clkin_gmac: external-gmac-clock {
> >               compatible = "fixed-clock";
> >               clock-frequency = <125000000>;
> > @@ -69,7 +76,7 @@ diy_led: led-1 {
> >
> >       fan: pwm-fan {
> >               compatible = "pwm-fan";
> > -             cooling-levels = <0 150 200 255>;
> > +             cooling-levels = <0 100 150 255>;
> >               #cooling-cells = <2>;
> >               fan-supply = <&vcc12v_dcin>;
> >               pwms = <&pwm1 0 50000 0>;
> > @@ -220,6 +227,16 @@ vdd_log: vdd-log {
> >               regulator-max-microvolt = <1700000>;
> >               vin-supply = <&vcc5v0_sys>;
> >       };
> > +
> > +     avdd: avdd {
> > +             compatible = "regulator-fixed";
> > +             regulator-name = "avdd";
> > +             regulator-always-on;
> > +             regulator-boot-on;
> > +             regulator-min-microvolt = <11000000>;
> > +             regulator-max-microvolt = <11000000>;
> > +             vin-supply = <&vcc3v3_s0>;
> > +     };
> >  };
> >
> >  &cpu_l0 {
> > @@ -428,8 +445,8 @@ regulator-state-mem {
> >
> >                       vcc3v0_touch: LDO_REG2 {
> >                               regulator-name = "vcc3v0_touch";
> > -                             regulator-always-on;
> > -                             regulator-boot-on;
> > +//                           regulator-always-on;
> > +//                           regulator-boot-on;
> >                               regulator-min-microvolt = <3000000>;
> >                               regulator-max-microvolt = <3000000>;
> >                               regulator-state-mem {
> > @@ -518,8 +535,8 @@ regulator-state-mem {
> >
> >                       vcc3v3_s0: SWITCH_REG2 {
> >                               regulator-name = "vcc3v3_s0";
> > -                             regulator-always-on;
> > -                             regulator-boot-on;
> > +//                           regulator-always-on;
> > +//                           regulator-boot-on;
> >                               regulator-state-mem {
> >                                       regulator-off-in-suspend;
> >                               };
> > @@ -593,6 +610,19 @@ fusb0: typec-portc at 22 {
> >               vbus-supply = <&vcc5v0_typec>;
> >               status = "okay";
> >       };
> > +
> > +     touch: touchscreen at 5d {
> > +             compatible = "goodix,gt911";
> > +             reg = <0x5d>;
> > +             AVDD28-supply = <&vcc3v0_touch>;
> > +             VDDIO-supply = <&vcc3v0_touch>;
> > +             interrupt-parent = <&gpio4>;
> > +             interrupts = <RK_PD5 IRQ_TYPE_EDGE_FALLING>;
> > +             irq-gpios = <&gpio4 RK_PD5 GPIO_ACTIVE_HIGH>;
> > +             reset-gpios = <&gpio4 RK_PD6 GPIO_ACTIVE_HIGH>;
> > +//           touchscreen-inverted-x;
> > +//           touchscreen-inverted-y;
> > +     };
> >  };
> >
> >  &i2s0 {
> > @@ -628,6 +658,88 @@ &io_domains {
> >       gpio1830-supply = <&vcc_3v0>;
> >  };
> >
> > +&mipi_dsi {
> > +     status = "okay";
> > +     clock-master;
> > +
> > +     ports {
> > +             mipi_out: port at 1 {
> > +                     reg = <1>;
> > +
> > +                     mipi_out_panel: endpoint {
> > +                             remote-endpoint = <&mipi_in_panel>;
> > +                     };
> > +             };
> > +     };
> > +
> > +     mipi_panel: panel at 0 {
> > +             compatible = "feiyang,fy07024di26a30d";
> > +             reg = <0>;
> > +             backlight = <&backlight>;
> > +             reset-gpios = <&gpio4 25 GPIO_ACTIVE_HIGH>;
> > +//           enable-gpios = <&gpio4 25 GPIO_ACTIVE_HIGH>;
> > +             width-mm = <154>;
> > +             height-mm = <86>;
> > +             rotation = <0>;
> > +             avdd-supply = <&avdd>;
> > +             dvdd-supply = <&vcc3v3_s0>;
> > +
> > +             display-timings {
> > +                     native-mode = <&timing0>;
> > +                     timing0: timing0 {
> > +                             clock-frequency = <50000000>;
> > +                             hactive = <1024>;
> > +                             vactive = <600>;
> > +                             hfront-porch = <160>;
> > +                             hback-porch = <160>;
> > +                             hsync-len = <10>;
> > +                             vback-porch = <23>;
> > +                             vfront-porch = <12>;
> > +                             vsync-len = <1>;
> > +                             hsync-active = <0>;
> > +                             vsync-active = <0>;
> > +                             pixelclk-active = <0>;
> > +                             de-active = <0>;
> > +                     };
> > +             };
> > +
> > +             ports {
> > +                     #address-cells = <1>;
> > +                     #size-cells = <0>;
> > +
> > +                     port at 0 {
> > +                             reg = <0>;
> > +
> > +                             mipi_in_panel: endpoint {
> > +                                     remote-endpoint = <&mipi_out_panel>;
> > +                             };
> > +                     };
> > +
> > +                     port at 1 {
> > +                             reg = <1>;
> > +
> > +                             mipi1_in_panel: endpoint at 1 {
> > +                                     remote-endpoint = <&mipi1_out_panel>;
> > +                             };
> > +                     };
> > +             };
> > +     };
> > +};
> > +
> > +&mipi_dsi1 {
> > +     status = "okay";
> > +
> > +     ports {
> > +             mipi1_out: port at 1 {
> > +                     reg = <1>;
> > +
> > +                     mipi1_out_panel: endpoint {
> > +                             remote-endpoint = <&mipi1_in_panel>;
> > +                     };
> > +             };
> > +     };
> > +};
> > +
> >  &pcie0 {
> >       ep-gpios = <&gpio2 RK_PD4 GPIO_ACTIVE_HIGH>;
> >       num-lanes = <4>;
> >
>
>
>
>



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