Whats missing in my new FB DRM driver... "No connectors reported connected with modes"?

[Carlos Palminha]

Hi Xinliang,

My get_modes seems to be implemented as the rcar driver...
Probably still missing some init step?

Regards,
C.Palminha


static int arcpgu_drm_connector_get_modes(struct drm_connector *connector)
{
struct drm_encoder_slave *slave;
const struct drm_encoder_slave_funcs *sfuncs;
struct arcpgu_drm_connector * con =
container_of(connector, struct arcpgu_drm_connector, connector);

slave = con->encoder_slave;
if(slave == NULL) {
dev_err(connector->dev->dev,
"connector_get_modes: cannot find slave encoder for connector\n");
return 0;
}

sfuncs = slave->slave_funcs;
if(sfuncs->get_modes == NULL){
return 0;
}

return sfuncs->get_modes(&slave->base,connector);
}

On 31-12-2015 02:19, Xinliang Liu wrote:
>
>
> On 31 December 2015 at 02:46, Carlos Palminha
> <CARLOS.PALMINHA at synopsys.com <mailto:CARLOS.PALMINHA at synopsys.com>> wrote:
>
>     Hi guys,
>
>     I'm writing a DRM driver for a framebuffer embedded hardware that
>     uses an i2c encoder (adv7511), following the basic steps suggested
>     by Laurent in "anatomy of an embedded KMS driver":
>     https://www.youtube.com/watch?v=Ja8fM7rTae4
>
>     After initiliazing all kms, crtc, encoder, i2c, connector functions
>     and structures i'm calling drm_fbdev_cma_init to create a fbdev.
>
>     When booting i'm getting an error message saying "No connectors
>     reported connected with modes", but the driver init is ok and i can
>     find the /dev/dri/* and /dev/fb0 devices.
>
>     Any clue what i might be missing during the driver load?
>
>
> ​I think you should check on the 'get_modes'​ call back of adv7511
> driver. (Or, if possible show us the code.)
>
> Best,
> -xinliang
>
>
>     Thanks...
>
>     Regards,
>     C.Palminha
>
>     --- boot log snippet ---
>     [drm] Initialized drm 1.1.0 20060810
>     drm-arcpgu e0017000.pgu: No connectors reported connected with modes
>     [drm] Cannot find any crtc or sizes - going 1024x768
>     Console: switching to colour frame buffer device 128x48
>     drm-arcpgu e0017000.pgu: fb0:  frame buffer device
>     [drm] Initialized drm-arcpgu 1.0.0 20151127 on minor 0
>     --- boot log snippet ---
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