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-rw-r--r--linux-core/drm_crtc.h2
-rw-r--r--linux-core/drm_crtc_helper.c294
2 files changed, 184 insertions, 112 deletions
diff --git a/linux-core/drm_crtc.h b/linux-core/drm_crtc.h
index 3a3a09aa..5f63dc2e 100644
--- a/linux-core/drm_crtc.h
+++ b/linux-core/drm_crtc.h
@@ -604,6 +604,8 @@ extern void drm_mode_config_init(struct drm_device *dev);
extern void drm_mode_config_cleanup(struct drm_device *dev);
extern void drm_mode_set_name(struct drm_display_mode *mode);
extern bool drm_mode_equal(struct drm_display_mode *mode1, struct drm_display_mode *mode2);
+extern int drm_mode_width(struct drm_display_mode *mode);
+extern int drm_mode_height(struct drm_display_mode *mode);
/* for us by fb module */
extern int drm_mode_attachmode_crtc(struct drm_device *dev,
diff --git a/linux-core/drm_crtc_helper.c b/linux-core/drm_crtc_helper.c
index dc18dbb4..89d87a6c 100644
--- a/linux-core/drm_crtc_helper.c
+++ b/linux-core/drm_crtc_helper.c
@@ -196,139 +196,209 @@ void drm_helper_disable_unused_functions(struct drm_device *dev)
}
EXPORT_SYMBOL(drm_helper_disable_unused_functions);
-/**
- * drm_pick_crtcs - pick crtcs for connector devices
- * @dev: DRM device
- *
- * LOCKING:
- * Caller must hold mode config lock.
- */
-void drm_pick_crtcs (struct drm_device *dev)
+static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height)
{
- int c, o, assigned;
- struct drm_connector *connector, *connector_equal;
- struct drm_encoder *encoder, *encoder_equal;
- struct drm_crtc *crtc;
- struct drm_display_mode *des_mode = NULL, *modes, *modes_equal;
- struct drm_connector_helper_funcs *connector_funcs;
- int found;
+ struct drm_display_mode *mode;
- DRM_DEBUG("\n");
- /* clean out all the encoder/crtc combos */
- list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
- encoder->crtc = NULL;
+ list_for_each_entry(mode, &connector->modes, head) {
+ if (drm_mode_width(mode) > width ||
+ drm_mode_height(mode) > height)
+ continue;
+ if (mode->type & DRM_MODE_TYPE_PREFERRED)
+ return mode;
+ }
+ return NULL;
+}
+
+static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
+{
+ bool enable;
+
+ if (strict) {
+ enable = connector->status == connector_status_connected;
+ } else {
+ enable = connector->status != connector_status_disconnected;
+ }
+ return enable;
+}
+
+static void drm_enable_connectors(struct drm_device *dev, bool *enabled)
+{
+ bool any_enabled = false;
+ struct drm_connector *connector;
+ int i = 0;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ any_enabled |= enabled[i] = drm_connector_enabled(connector, true);
+ i++;
+ }
+
+ if (!any_enabled) {
+ i = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ enabled[i] = drm_connector_enabled(connector, false);
+ i++;
+ }
}
+}
+
+static bool drm_target_preferred(struct drm_device *dev, struct drm_display_mode **modes,
+ bool *enabled, int width, int height)
+{
+ struct drm_connector *connector;
+ struct drm_display_mode *preferred;
+ int i = 0;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
- connector_funcs = connector->helper_private;
- connector->encoder = NULL;
-
- /* Don't hook up connectors that are disconnected ??
- *
- * This is debateable. Do we want fixed /dev/fbX or
- * dynamic on hotplug (need mode code for that though) ?
- *
- * If we don't hook up connectors now, then we only create
- * /dev/fbX for the connector that's enabled, that's good as
- * the users console will be on that connector.
- *
- * If we do hook up connectors that are disconnected now, then
- * the user may end up having to muck about with the fbcon
- * map flags to assign his console to the enabled connector. Ugh.
- */
- if (connector->status != connector_status_connected)
- continue;
- if (list_empty(&connector->modes))
+ if (enabled[i] == false) {
+ i++;
continue;
-
- des_mode = NULL;
- found = 0;
- list_for_each_entry(des_mode, &connector->modes, head) {
- if (des_mode->type & DRM_MODE_TYPE_PREFERRED) {
- found = 1;
- break;
- }
}
- /* No preferred mode, let's just select the first available */
- if (!found) {
- des_mode = NULL;
- list_for_each_entry(des_mode, &connector->modes, head) {
+ modes[i] = drm_has_preferred_mode(connector, width, height);
+ if (!modes[i]) {
+ list_for_each_entry(modes[i], &connector->modes, head)
break;
- }
}
+ i++;
+ }
+ return true;
+}
- encoder = connector_funcs->best_encoder(connector);
- if (!encoder)
- continue;
+static int drm_pick_crtcs(struct drm_device *dev,
+ struct drm_crtc **best_crtcs,
+ struct drm_display_mode **modes,
+ int n, int width, int height)
+{
+ int c, o;
+ struct drm_connector *connector;
+ struct drm_connector_helper_funcs *connector_funcs;
+ struct drm_encoder *encoder;
+ struct drm_crtc *best_crtc;
+ int my_score, best_score, score;
+ struct drm_crtc **crtcs, *crtc;
+
+ if (n == dev->mode_config.num_connector)
+ return 0;
+ c = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ if (c == n)
+ break;
+ c++;
+ }
- connector->encoder = encoder;
+ best_crtcs[n] = NULL;
+ best_crtc = NULL;
+ best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height);
+ if (modes[n] == NULL) {
+ return best_score;
+ }
- c = -1;
- list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
- assigned = 0;
+ crtcs = kmalloc(dev->mode_config.num_connector * sizeof(struct drm_crtc *), GFP_KERNEL);
+ if (!crtcs)
+ return best_score;
+
+ my_score = 1;
+ if (connector->status == connector_status_connected)
+ my_score++;
+ if (drm_has_preferred_mode(connector, width, height))
+ my_score++;
+
+ connector_funcs = connector->helper_private;
+ encoder = connector_funcs->best_encoder(connector);
+ if (!encoder)
+ goto out;
+
+ connector->encoder = encoder;
+
+ /* select a crtc for this connector and then attempt to configure
+ remaining connectors */
+ c = 0;
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ if ((connector->encoder->possible_crtcs & (1 << c)) == 0) {
c++;
- if ((encoder->possible_crtcs & (1 << c)) == 0)
- continue;
-
- list_for_each_entry(encoder_equal, &dev->mode_config.encoder_list, head) {
- if (encoder->base.id == encoder_equal->base.id)
- continue;
+ continue;
+ }
- /* Find out if crtc has been assigned before */
- if (encoder_equal->crtc == crtc)
- assigned = 1;
- }
+ for (o = 0; o < n; o++)
+ if (best_crtcs[o] == crtc)
+ break;
-#if 1 /* continue for now */
- if (assigned)
- continue;
-#endif
-
- o = -1;
- list_for_each_entry(connector_equal, &dev->mode_config.connector_list, head) {
- o++;
- if (connector->base.id == connector_equal->base.id)
- continue;
-
- encoder_equal = connector_equal->encoder;
-
- if (!encoder_equal)
- continue;
-
- list_for_each_entry(modes, &connector->modes, head) {
- list_for_each_entry(modes_equal, &connector_equal->modes, head) {
- if (drm_mode_equal (modes, modes_equal)) {
- if ((encoder->possible_clones & encoder_equal->possible_clones) && (connector_equal->encoder->crtc == crtc)) {
- printk("Cloning %s (0x%x) to %s (0x%x)\n",drm_get_connector_name(connector),encoder->possible_clones,drm_get_connector_name(connector_equal),encoder_equal->possible_clones);
- des_mode = modes;
- assigned = 0;
- goto clone;
- }
- }
- }
- }
- }
+ if (o < n) {
+ /* ignore cloning for now */
+ c++;
+ continue;
+ }
-clone:
- /* crtc has been assigned skip it */
- if (assigned)
- continue;
-
- /* Found a CRTC to attach to, do it ! */
- encoder->crtc = crtc;
- encoder->crtc->desired_mode = des_mode;
- connector->initial_x = 0;
- connector->initial_y = 0;
- DRM_DEBUG("Desired mode for CRTC %d is 0x%x:%s\n",c,des_mode->base.id, des_mode->name);
- break;
- }
+ crtcs[n] = crtc;
+ memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *));
+ score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1, width, height);
+ if (score > best_score) {
+ best_crtc = crtc;
+ best_score = score;
+ memcpy(best_crtcs, crtcs, dev->mode_config.num_connector * sizeof(struct drm_crtc *));
+ }
+ c++;
}
+out:
+ kfree(crtcs);
+ return best_score;
}
-EXPORT_SYMBOL(drm_pick_crtcs);
+static void drm_setup_crtcs(struct drm_device *dev)
+{
+ struct drm_crtc **crtcs;
+ struct drm_display_mode **modes;
+ struct drm_encoder *encoder;
+ struct drm_connector *connector;
+ bool *enabled;
+ int width, height;
+ int i, ret;
+
+ width = dev->mode_config.max_width;
+ height = dev->mode_config.max_height;
+
+ /* clean out all the encoder/crtc combos */
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+ encoder->crtc = NULL;
+ }
+
+ crtcs = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_crtc *), GFP_KERNEL);
+ modes = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_display_mode *), GFP_KERNEL);
+ enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), GFP_KERNEL);
+
+ drm_enable_connectors(dev, enabled);
+
+ ret = drm_target_preferred(dev, modes, enabled, width, height);
+ if (!ret)
+ DRM_ERROR("Unable to find initial modes\n");
+
+ drm_pick_crtcs(dev, crtcs, modes, 0, width, height);
+
+ i = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ struct drm_display_mode *mode = modes[i];
+ struct drm_crtc *crtc = crtcs[i];
+
+ if (connector->encoder == NULL) {
+ i++;
+ continue;
+ }
+
+ if (mode && crtc) {
+ crtc->desired_mode = mode;
+ connector->encoder->crtc = crtc;
+ } else
+ connector->encoder->crtc = NULL;
+ i++;
+ }
+
+ kfree(crtcs);
+ kfree(modes);
+ kfree(enabled);
+}
/**
* drm_crtc_set_mode - set a mode
* @crtc: CRTC to program
@@ -644,7 +714,7 @@ bool drm_helper_plugged_event(struct drm_device *dev)
drm_helper_probe_connector_modes(dev, dev->mode_config.max_width, dev->mode_config.max_height);
- drm_pick_crtcs(dev);
+ drm_setup_crtcs(dev);
/* alert the driver fb layer */
dev->mode_config.funcs->fb_changed(dev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 05:11:31 +0000