Re: [PATCH 13/14] drm/bridge: synopsys: Add DW HDMI QP TX controller driver

[Cristian Ciocaltea]

Hi Sam,

On 6/1/24 5:32 PM, Sam Ravnborg wrote:
> Hi Cristian,
> 
> a few drive-by comments below.
> 
> 	Sam
> 
> 
>> +
>> +static const struct drm_connector_funcs dw_hdmi_qp_connector_funcs = {
>> +	.fill_modes = drm_helper_probe_single_connector_modes,
>> +	.detect = dw_hdmi_connector_detect,
>> +	.destroy = drm_connector_cleanup,
>> +	.force = dw_hdmi_qp_connector_force,
>> +	.reset = drm_atomic_helper_connector_reset,
>> +	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
>> +	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
>> +};
>> +
>> +static int dw_hdmi_qp_bridge_attach(struct drm_bridge *bridge,
>> +				    enum drm_bridge_attach_flags flags)
>> +{
>> +	struct dw_hdmi *hdmi = bridge->driver_private;
>> +
>> +	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
>> +		return drm_bridge_attach(bridge->encoder, hdmi->next_bridge,
>> +					 bridge, flags);
>> +
>> +	return dw_hdmi_connector_create(hdmi, &dw_hdmi_qp_connector_funcs);
>> +}
> 
> Are there any users left that requires the display driver to create the
> connector?
> In other words - could this driver fail if DRM_BRIDGE_ATTACH_NO_CONNECTOR
> is not passed and drop dw_hdmi_connector_create()?
> 
> I did not try to verify this - just a naive question.

I've just tested this and it doesn't work - dw_hdmi_connector_create()
is still needed.

Regards,
Cristian