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drm: rcar-du: Don't fail probe in case of partial encoder init error

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If an encoder fails to initialize the device can still be used without
the failed encoder. Don't propagate the error out of the probe function
but just skip the failed encoder.

As a special case a deferred probe request from the encoder is still
propagated out of the probe function in order not to break the deferred
probing mechanism.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2014-12-11 01:26:04 +02:00
parent 3b2b36e5f0
commit 347d761c74
2 changed files with 34 additions and 9 deletions
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28
drivers/gpu/drm/rcar-du/rcar_du_encoder.c
View File

@ -193,32 +193,46 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu,
if (renc->lvds) {
dev_err(rcdu->dev,
"Chaining LVDS and HDMI encoders not supported\n");
return -EINVAL;
ret = -EINVAL;
goto done;
}
ret = rcar_du_hdmienc_init(rcdu, renc, enc_node);
if (ret < 0)
return ret;
goto done;
} else {
ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
encoder_type);
if (ret < 0)
return ret;
goto done;
drm_encoder_helper_add(encoder, &encoder_helper_funcs);
}
switch (encoder_type) {
case DRM_MODE_ENCODER_LVDS:
return rcar_du_lvds_connector_init(rcdu, renc, con_node);
ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);
break;
case DRM_MODE_ENCODER_DAC:
return rcar_du_vga_connector_init(rcdu, renc);
ret = rcar_du_vga_connector_init(rcdu, renc);
break;
case DRM_MODE_ENCODER_TMDS:
return rcar_du_hdmi_connector_init(rcdu, renc);
ret = rcar_du_hdmi_connector_init(rcdu, renc);
break;
default:
return -EINVAL;
ret = -EINVAL;
break;
}
done:
if (ret < 0) {
if (encoder->name)
encoder->funcs->destroy(encoder);
devm_kfree(rcdu->dev, renc);
}
return ret;
}

15
drivers/gpu/drm/rcar-du/rcar_du_kms.c
View File

@ -346,8 +346,14 @@ static int rcar_du_encoders_init(struct rcar_du_device *rcdu)
/* Process the output pipeline. */
ret = rcar_du_encoders_init_one(rcdu, output, &ep);
if (ret < 0) {
of_node_put(ep_node);
return ret;
if (ret == -EPROBE_DEFER) {
of_node_put(ep_node);
return ret;
}
dev_info(rcdu->dev,
"encoder initialization failed, skipping\n");
continue;
}
num_encoders += ret;
@ -413,6 +419,11 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
if (ret < 0)
return ret;
if (ret == 0) {
dev_err(rcdu->dev, "error: no encoder could be initialized\n");
return -EINVAL;
}
num_encoders = ret;
/* Set the possible CRTCs and possible clones. There's always at least