Re: [PATCH 22/22] drm: rockchip: Add VOP2 driver

[Nicolas Frattaroli <frattaroli.nicolas@gmail.com>]

On Montag, 20. Dezember 2021 12:06:30 CET Sascha Hauer wrote:
> From: Andy Yan <andy.yan@rock-chips.com>
> 
> The VOP2 unit is found on Rockchip SoCs beginning with rk3566/rk3568.
> It replaces the VOP unit found in the older Rockchip SoCs.
> 
> This driver has been derived from the downstream Rockchip Kernel and
> heavily modified:
> 
> - All nonstandard DRM properties have been removed
> - dropped struct vop2_plane_state and pass around less data between
>   functions
> - Dropped all DRM_FORMAT_* not known on upstream
> - rework register access to get rid of excessively used macros
> - Drop all waiting for framesyncs
> 
> The driver is tested with HDMI and MIPI-DSI display on a RK3568-EVB
> board. Overlay support is tested with the modetest utility. AFBC support
> on the cluster windows is tested with weston-simple-dmabuf-egl on
> weston using the (yet to be upstreamed) panfrost driver support.
> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---

Hi Sascha,

sadly I'm getting

[    1.668856] rockchip-drm display-subsystem: [drm] *ERROR* failed to get vop2 register byname
[    1.669621] rockchip-drm display-subsystem: failed to bind fe040000.vop (ops vop2_component_ops): -22
[    1.670584] rockchip-drm display-subsystem: master bind failed: -22
[    1.671164] dwhdmi-rockchip: probe of fe0a0000.hdmi failed with error -22

on a Quartz64 Model A.


> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
> +	if (!res) {
> +		drm_err(vop2->drm, "failed to get vop2 register byname\n");
> +		return -EINVAL;
> +	}

This seems to be the code that triggers it.

Any ideas as to what could be causing this?

Regards,
Nicolas Frattaroli