[meta-xilinx] Xylon DRM support in 3.19 xilinx kernel

[Nathan Rossi]

On Wed, Oct 14, 2015 at 8:28 PM, Ahsan, Noor <Noor_Ahsan at mentor.com> wrote:
> Guys,
>
>
>
> Any help will be appreciated.
>
>
>
> Noor
>
>
>
> From: Khan, Yasir
> Sent: Tuesday, October 13, 2015 9:21 PM
> To: meta-xilinx at lists.yoctoproject.org
> Cc: Ahsan, Noor
> Subject: Xylon DRM support in 3.19 xilinx kernel
>
>
>
> Hello all,
>
> Has anyone been successful in getting the HDMI display to work on zc702
> evaluation kit board using the logicBricks HDMI controller IP and latest
> 3.19 xilinx kernel? I get the below kernel log on boot showing the xylon drm
> driver unable to load.
>
> [    1.080584] xdevcfg f8007000.ps7-dev-cfg: ioremap 0xf8007000 to f006c000
> [    1.088988] [drm] Initialized drm 1.1.0 20060810
> [    1.099887] [drm] logiCVC IP core 4.00.a
> [    1.103774] [drm] logicvc registers not readable
> [    1.108357] [drm] logicvc size-position disabled
> [    1.113059] [drm] no private-plane property
> [    1.117455] [drm:xylon_drm_crtc_create] *ERROR* failed get pixel clock

This looks like the pixel clock is not available, make sure that the
"si570" node you have setup as the pixel clock is getting probed. You
might need to enable the kernel driver for the si570 i2c device.

If the si570 device is being probed, you will need to dive into the
driver to see why its failing to "get pixel clock".

Regards,
Nathan

> [    1.123967] [drm:xylon_drm_load] *ERROR* failed create xylon crtc
> [    1.130186] [drm] driver load deferred, will be called again
> [    1.140422] platform amba at 0:xylon_drm: Driver xylon-drm requests probe
> deferral
>
> FYI, I've below device nodes in dts
>
> logicvc_1: logicvc at 40030000 {
>                         compatible = "xylon,logicvc-4.00.a";
>                         reg = <0x40030000 0x10000>;
>                         interrupt-parent = <&ps7_scugic_0>;
>                         interrupts = <0 58 4>;
>                         background-layer-bits-per-pixel = <32>;
>                         background-layer-type = "rgb";
>                         color-space = <1>;
>                         interface = <0>;
>                         is-readable-regs;
>                         is-size-position;
>                         pixel-stride = <2048>;
>                         pixel-clock-active-high =<1>;
>                         pixel-data-invert = <0>;
>                         layer_0 {
>                                 bits-per-pixel = <32>;
>                                 type = "rgb";
>                                 transparency = "layer";
>                         } ;
>                         layer_1 {
>                                 bits-per-pixel = <16>;
>                                 type = "yuv";
>                                 transparency = "layer";
>                         } ;
>                 } ;
>
>                 xylon_drm {
>                         compatible = "xylon,drm-1.00.a";
>                         clocks = <&si570>;
>                         device = <&logicvc_1>;
>                         encoder = <&adv7511>;
>                         private-plane = <0>;
>                 } ;
>
> Any help would be highly appreciated.
>
> Thanks,
> Yasir
>
>
> --
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