static unsigned int detect_connectors(struct drm_device *dev)
{
struct omap_drm_private *priv = dev->dev_private;
unsigned int connected_connectors = 0;
int i;
for (i = 0; i < priv->num_connectors; i++) {
struct drm_connector *connector = priv->connectors[i];
if (omap_connector_detect(connector, true) ==
connector_status_connected) {
connected_connectors |= (1 << i);
}
}
return connected_connectors;
}
static int omap_modeset_init(struct drm_device *dev)
{
const struct omap_gpu_platform_data *pdata = dev->dev->platform_data;
struct omap_gpu_private *priv = dev->dev_private;
struct omap_dss_device *dssdev = NULL;
int i, j;
unsigned int connected_connectors = 0;
/* create encoders for each manager */
int create_encoder(int i) {
struct omap_overlay_manager *mgr = omap_dss_get_overlay_manager(i);
struct drm_encoder *encoder = omap_encoder_init(dev, mgr);
if (!encoder) {
dev_err(dev->dev, "could not create encoder\n");
return -ENOMEM;
}
priv->encoders[priv->num_encoders++] = encoder;
return 0;
}
/* create connectors for each display device */
int create_connector(struct omap_dss_device *dssdev) {
static struct notifier_block *notifier;
struct drm_connector *connector;
if (!dssdev->driver) {
dev_warn(dev->dev, "%s has no driver.. skipping it\n",
dssdev->name);
return 0;
}
if (!(dssdev->driver->get_timings || dssdev->driver->get_edid)) {
dev_warn(dev->dev, "%s driver does not support "
"get_timings or get_edid.. skipping it!\n",
dssdev->name);
return 0;
}
connector = omap_connector_init(dev,
get_connector_type(dssdev->type), dssdev);
if (!connector) {
dev_err(dev->dev, "could not create connector\n");
return -ENOMEM;
}
/* track what is already connected.. rather than looping thru all
* connectors twice later, first for connected then for remainder
* (which could be a race condition if connected status changes)
*/
if (omap_connector_detect (connector) == connector_status_connected) {
connected_connectors |= (1 << priv->num_connectors);
}
priv->connectors[priv->num_connectors++] = connector;
notifier = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
notifier->notifier_call = omap_gpu_notifier;
omap_dss_add_notify(dssdev, notifier);
for (j = 0; j < priv->num_encoders; j++) {
struct omap_overlay_manager *mgr =
omap_encoder_get_manager(priv->encoders[j]);
if (mgr->device == dssdev) {
drm_mode_connector_attach_encoder(connector,
priv->encoders[j]);
}
}
return 0;
}
/* create up to max_overlays CRTCs mapping to overlays.. by default,
* connect the overlays to different managers/encoders, giving priority
* to encoders connected to connectors with a detected connection
*/
int create_crtc(int i) {
struct omap_overlay *ovl = omap_dss_get_overlay(i);
struct omap_overlay_manager *mgr = NULL;
struct drm_crtc *crtc;
if (ovl->manager) {
DBG("disconnecting %s from %s", ovl->name, ovl->manager->name);
ovl->unset_manager(ovl);
}
/* find next best connector... ones with detected connection first
*/
while (j < priv->num_connectors && !mgr) {
if (connected_connectors & (1 << j)) {
struct drm_encoder * encoder =
omap_connector_attached_encoder (priv->connectors[j]);
if (encoder) {
mgr = omap_encoder_get_manager (encoder);
}
}
j++;
}
/* if we couldn't find another connected connector, lets start looking
* at the unconnected connectors:
*/
while (j < 2 * priv->num_connectors && !mgr) {
int idx = j - priv->num_connectors;
if (!(connected_connectors & (1 << idx))) {
struct drm_encoder * encoder =
omap_connector_attached_encoder (priv->connectors[idx]);
if (encoder) {
mgr = omap_encoder_get_manager (encoder);
}
}
j++;
}
if (mgr) {
DBG("connecting %s to %s", ovl->name, mgr->name);
ovl->set_manager(ovl, mgr);
}
crtc = omap_crtc_init(dev, ovl);
if (!crtc) {
dev_err(dev->dev, "could not create CRTC\n");
return -ENOMEM;
}
priv->crtcs[priv->num_crtcs++] = crtc;
return 0;
}
drm_mode_config_init(dev);
if (pdata) {
/* if platform data is provided by the board file, use it to control
* which overlays, managers, and devices we own.
*/
for (i = 0; i < pdata->mgr_cnt; i++) {
if (create_encoder(pdata->mgr_ids[i])) {
goto fail;
}
}
for (i = 0; i < pdata->dev_cnt; i++) {
int m(struct omap_dss_device *dssdev, void *data) {
return ! strcmp(dssdev->name, data);
}
struct omap_dss_device *dssdev =
omap_dss_find_device((void *)pdata->dev_names[i], m);
if (!dssdev) {
dev_warn(dev->dev, "no such dssdev: %s\n",
pdata->dev_names[i]);
continue;
}
if (create_connector(dssdev)) {
goto fail;
}
}
j = 0;
for (i = 0; i < pdata->ovl_cnt; i++) {
if (create_crtc(pdata->ovl_ids[i])) {
goto fail;
}
}
} else {