* This helper library can be used independently of the modeset helper library.
* Drivers can also overwrite different parts e.g. use their own hotplug
* handling code to avoid probing unrelated outputs.
+ *
+ * The probe helpers share the function table structures with other display
+ * helper libraries. See struct &drm_connector_helper_funcs for the details.
*/
static bool drm_kms_helper_poll = true;
}
EXPORT_SYMBOL(drm_kms_helper_poll_enable_locked);
-
-static int drm_helper_probe_single_connector_modes_merge_bits(struct drm_connector *connector,
- uint32_t maxX, uint32_t maxY, bool merge_type_bits)
+/**
+ * drm_helper_probe_single_connector_modes - get complete set of display modes
+ * @connector: connector to probe
+ * @maxX: max width for modes
+ * @maxY: max height for modes
+ *
+ * Based on the helper callbacks implemented by @connector in struct
+ * &drm_connector_helper_funcs try to detect all valid modes. Modes will first
+ * be added to the connector's probed_modes list, then culled (based on validity
+ * and the @maxX, @maxY parameters) and put into the normal modes list.
+ *
+ * Intended to be used as a generic implementation of the ->fill_modes()
+ * @connector vfunc for drivers that use the CRTC helpers for output mode
+ * filtering and detection.
+ *
+ * The basic procedure is as follows
+ *
+ * 1. All modes currently on the connector's modes list are marked as stale
+ *
+ * 2. New modes are added to the connector's probed_modes list with
+ * drm_mode_probed_add(). New modes start their life with status as OK.
+ * Modes are added from a single source using the following priority order.
+ *
+ * - debugfs 'override_edid' (used for testing only)
+ * - firmware EDID (drm_load_edid_firmware())
+ * - connector helper ->get_modes() vfunc
+ * - if the connector status is connector_status_connected, standard
+ * VESA DMT modes up to 1024x768 are automatically added
+ * (drm_add_modes_noedid())
+ *
+ * Finally modes specified via the kernel command line (video=...) are
+ * added in addition to what the earlier probes produced
+ * (drm_helper_probe_add_cmdline_mode()). These modes are generated
+ * using the VESA GTF/CVT formulas.
+ *
+ * 3. Modes are moved from the probed_modes list to the modes list. Potential
+ * duplicates are merged together (see drm_mode_connector_list_update()).
+ * After this step the probed_modes list will be empty again.
+ *
+ * 4. Any non-stale mode on the modes list then undergoes validation
+ *
+ * - drm_mode_validate_basic() performs basic sanity checks
+ * - drm_mode_validate_size() filters out modes larger than @maxX and @maxY
+ * (if specified)
+ * - drm_mode_validate_flag() checks the modes againt basic connector
+ * capabilites (interlace_allowed,doublescan_allowed,stereo_allowed)
+ * - the optional connector ->mode_valid() helper can perform driver and/or
+ * hardware specific checks
+ *
+ * 5. Any mode whose status is not OK is pruned from the connector's modes list,
+ * accompanied by a debug message indicating the reason for the mode's
+ * rejection (see drm_mode_prune_invalid()).
+ *
+ * Returns:
+ * The number of modes found on @connector.
+ */
+int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
+ uint32_t maxX, uint32_t maxY)
{
struct drm_device *dev = connector->dev;
struct drm_display_mode *mode;
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
connector->name);
- /* set all modes to the unverified state */
+ /* set all old modes to the stale state */
list_for_each_entry(mode, &connector->modes, head)
- mode->status = MODE_UNVERIFIED;
+ mode->status = MODE_STALE;
+
+ old_status = connector->status;
if (connector->force) {
if (connector->force == DRM_FORCE_ON ||
if (connector->funcs->force)
connector->funcs->force(connector);
} else {
- old_status = connector->status;
-
connector->status = connector->funcs->detect(connector, true);
+ }
+
+ /*
+ * Normally either the driver's hpd code or the poll loop should
+ * pick up any changes and fire the hotplug event. But if
+ * userspace sneaks in a probe, we might miss a change. Hence
+ * check here, and if anything changed start the hotplug code.
+ */
+ if (old_status != connector->status) {
+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
+ connector->base.id,
+ connector->name,
+ drm_get_connector_status_name(old_status),
+ drm_get_connector_status_name(connector->status));
/*
- * Normally either the driver's hpd code or the poll loop should
- * pick up any changes and fire the hotplug event. But if
- * userspace sneaks in a probe, we might miss a change. Hence
- * check here, and if anything changed start the hotplug code.
+ * The hotplug event code might call into the fb
+ * helpers, and so expects that we do not hold any
+ * locks. Fire up the poll struct instead, it will
+ * disable itself again.
*/
- if (old_status != connector->status) {
- DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
- connector->base.id,
- connector->name,
- old_status, connector->status);
-
- /*
- * The hotplug event code might call into the fb
- * helpers, and so expects that we do not hold any
- * locks. Fire up the poll struct instead, it will
- * disable itself again.
- */
- dev->mode_config.delayed_event = true;
- if (dev->mode_config.poll_enabled)
- schedule_delayed_work(&dev->mode_config.output_poll_work,
- 0);
- }
+ dev->mode_config.delayed_event = true;
+ if (dev->mode_config.poll_enabled)
+ schedule_delayed_work(&dev->mode_config.output_poll_work,
+ 0);
}
/* Re-enable polling in case the global poll config changed. */
goto prune;
}
+ if (connector->override_edid) {
+ struct edid *edid = (struct edid *) connector->edid_blob_ptr->data;
+
+ count = drm_add_edid_modes(connector, edid);
+ drm_edid_to_eld(connector, edid);
+ } else {
#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
- count = drm_load_edid_firmware(connector);
- if (count == 0)
+ count = drm_load_edid_firmware(connector);
+ if (count == 0)
#endif
- {
- if (connector->override_edid) {
- struct edid *edid = (struct edid *) connector->edid_blob_ptr->data;
-
- count = drm_add_edid_modes(connector, edid);
- drm_edid_to_eld(connector, edid);
- } else
count = (*connector_funcs->get_modes)(connector);
}
if (count == 0)
goto prune;
- drm_mode_connector_list_update(connector, merge_type_bits);
+ drm_mode_connector_list_update(connector);
if (connector->interlace_allowed)
mode_flags |= DRM_MODE_FLAG_INTERLACE;
return count;
}
-
-/**
- * drm_helper_probe_single_connector_modes - get complete set of display modes
- * @connector: connector to probe
- * @maxX: max width for modes
- * @maxY: max height for modes
- *
- * Based on the helper callbacks implemented by @connector try to detect all
- * valid modes. Modes will first be added to the connector's probed_modes list,
- * then culled (based on validity and the @maxX, @maxY parameters) and put into
- * the normal modes list.
- *
- * Intended to be use as a generic implementation of the ->fill_modes()
- * @connector vfunc for drivers that use the crtc helpers for output mode
- * filtering and detection.
- *
- * Returns:
- * The number of modes found on @connector.
- */
-int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
- uint32_t maxX, uint32_t maxY)
-{
- return drm_helper_probe_single_connector_modes_merge_bits(connector, maxX, maxY, true);
-}
EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
-/**
- * drm_helper_probe_single_connector_modes_nomerge - get complete set of display modes
- * @connector: connector to probe
- * @maxX: max width for modes
- * @maxY: max height for modes
- *
- * This operates like drm_hehlper_probe_single_connector_modes except it
- * replaces the mode bits instead of merging them for preferred modes.
- */
-int drm_helper_probe_single_connector_modes_nomerge(struct drm_connector *connector,
- uint32_t maxX, uint32_t maxY)
-{
- return drm_helper_probe_single_connector_modes_merge_bits(connector, maxX, maxY, false);
-}
-EXPORT_SYMBOL(drm_helper_probe_single_connector_modes_nomerge);
-
/**
* drm_kms_helper_hotplug_event - fire off KMS hotplug events
* @dev: drm_device whose connector state changed
projects / linux-2.6-block.git / blobdiff