drm: Split out drm_probe_helper.c from drm_crtc_helper.c

This is leftover stuff from my previous doc round which I kinda wanted
to do but didn't yet due to rebase hell.

The modeset helpers and the probing helpers a independent and e.g.
i915 uses the probing stuff but has its own modeset infrastructure. It
hence makes to split this up. While at it add a DOC: comment for the
probing libraray.

It would be rather neat to pull some of the DocBook documenting these
two helpers into in-line DOC: comments. But unfortunately kerneldoc
doesn't support markdown or something similar to make nice-looking
documentation, so the current state is better.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 0 insertions, 370 deletions

diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index c43825e8f5c1..df281b54db01 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -72,147 +72,6 @@ void drm_helper_move_panel_connectors_to_head(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head);
 
-static bool drm_kms_helper_poll = true;
-module_param_named(poll, drm_kms_helper_poll, bool, 0600);
-
-static void drm_mode_validate_flag(struct drm_connector *connector,
-                                   int flags)
-{
-        struct drm_display_mode *mode;
-
-        if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE |
-                      DRM_MODE_FLAG_3D_MASK))
-                return;
-
-        list_for_each_entry(mode, &connector->modes, head) {
-                if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
-                                !(flags & DRM_MODE_FLAG_INTERLACE))
-                        mode->status = MODE_NO_INTERLACE;
-                if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
-                                !(flags & DRM_MODE_FLAG_DBLSCAN))
-                        mode->status = MODE_NO_DBLESCAN;
-                if ((mode->flags & DRM_MODE_FLAG_3D_MASK) &&
-                                !(flags & DRM_MODE_FLAG_3D_MASK))
-                        mode->status = MODE_NO_STEREO;
-        }
-
-        return;
-}
-
-/**
- * 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)
-{
-        struct drm_device *dev = connector->dev;
-        struct drm_display_mode *mode;
-        struct drm_connector_helper_funcs *connector_funcs =
-                connector->helper_private;
-        int count = 0;
-        int mode_flags = 0;
-        bool verbose_prune = true;
-
-        WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
-
-        DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
-                        drm_get_connector_name(connector));
-        /* set all modes to the unverified state */
-        list_for_each_entry(mode, &connector->modes, head)
-                mode->status = MODE_UNVERIFIED;
-
-        if (connector->force) {
-                if (connector->force == DRM_FORCE_ON)
-                        connector->status = connector_status_connected;
-                else
-                        connector->status = connector_status_disconnected;
-                if (connector->funcs->force)
-                        connector->funcs->force(connector);
-        } else {
-                connector->status = connector->funcs->detect(connector, true);
-        }
-
-        /* Re-enable polling in case the global poll config changed. */
-        if (drm_kms_helper_poll != dev->mode_config.poll_running)
-                drm_kms_helper_poll_enable(dev);
-
-        dev->mode_config.poll_running = drm_kms_helper_poll;
-
-        if (connector->status == connector_status_disconnected) {
-                DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
-                        connector->base.id, drm_get_connector_name(connector));
-                drm_mode_connector_update_edid_property(connector, NULL);
-                verbose_prune = false;
-                goto prune;
-        }
-
-#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
-        count = drm_load_edid_firmware(connector);
-        if (count == 0)
-#endif
-                count = (*connector_funcs->get_modes)(connector);
-
-        if (count == 0 && connector->status == connector_status_connected)
-                count = drm_add_modes_noedid(connector, 1024, 768);
-        if (count == 0)
-                goto prune;
-
-        drm_mode_connector_list_update(connector);
-
-        if (maxX && maxY)
-                drm_mode_validate_size(dev, &connector->modes, maxX, maxY);
-
-        if (connector->interlace_allowed)
-                mode_flags |= DRM_MODE_FLAG_INTERLACE;
-        if (connector->doublescan_allowed)
-                mode_flags |= DRM_MODE_FLAG_DBLSCAN;
-        if (connector->stereo_allowed)
-                mode_flags |= DRM_MODE_FLAG_3D_MASK;
-        drm_mode_validate_flag(connector, mode_flags);
-
-        list_for_each_entry(mode, &connector->modes, head) {
-                if (mode->status == MODE_OK)
-                        mode->status = connector_funcs->mode_valid(connector,
-                                                                   mode);
-        }
-
-prune:
-        drm_mode_prune_invalid(dev, &connector->modes, verbose_prune);
-
-        if (list_empty(&connector->modes))
-                return 0;
-
-        list_for_each_entry(mode, &connector->modes, head)
-                mode->vrefresh = drm_mode_vrefresh(mode);
-
-        drm_mode_sort(&connector->modes);
-
-        DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
-                        drm_get_connector_name(connector));
-        list_for_each_entry(mode, &connector->modes, head) {
-                drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
-                drm_mode_debug_printmodeline(mode);
-        }
-
-        return count;
-}
-EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
-
 /**
  * drm_helper_encoder_in_use - check if a given encoder is in use
  * @encoder: encoder to check
@@ -1020,232 +879,3 @@ void drm_helper_resume_force_mode(struct drm_device *dev)
         drm_modeset_unlock_all(dev);
 }
 EXPORT_SYMBOL(drm_helper_resume_force_mode);
-
-/**
- * drm_kms_helper_hotplug_event - fire off KMS hotplug events
- * @dev: drm_device whose connector state changed
- *
- * This function fires off the uevent for userspace and also calls the
- * output_poll_changed function, which is most commonly used to inform the fbdev
- * emulation code and allow it to update the fbcon output configuration.
- *
- * Drivers should call this from their hotplug handling code when a change is
- * detected. Note that this function does not do any output detection of its
- * own, like drm_helper_hpd_irq_event() does - this is assumed to be done by the
- * driver already.
- *
- * This function must be called from process context with no mode
- * setting locks held.
- */
-void drm_kms_helper_hotplug_event(struct drm_device *dev)
-{
-        /* send a uevent + call fbdev */
-        drm_sysfs_hotplug_event(dev);
-        if (dev->mode_config.funcs->output_poll_changed)
-                dev->mode_config.funcs->output_poll_changed(dev);
-}
-EXPORT_SYMBOL(drm_kms_helper_hotplug_event);
-
-#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
-static void output_poll_execute(struct work_struct *work)
-{
-        struct delayed_work *delayed_work = to_delayed_work(work);
-        struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
-        struct drm_connector *connector;
-        enum drm_connector_status old_status;
-        bool repoll = false, changed = false;
-
-        if (!drm_kms_helper_poll)
-                return;
-
-        mutex_lock(&dev->mode_config.mutex);
-        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-
-                /* Ignore forced connectors. */
-                if (connector->force)
-                        continue;
-
-                /* Ignore HPD capable connectors and connectors where we don't
-                 * want any hotplug detection at all for polling. */
-                if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD)
-                        continue;
-
-                repoll = true;
-
-                old_status = connector->status;
-                /* if we are connected and don't want to poll for disconnect
-                   skip it */
-                if (old_status == connector_status_connected &&
-                    !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT))
-                        continue;
-
-                connector->status = connector->funcs->detect(connector, false);
-                if (old_status != connector->status) {
-                        const char *old, *new;
-
-                        old = drm_get_connector_status_name(old_status);
-                        new = drm_get_connector_status_name(connector->status);
-
-                        DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "
-                                      "status updated from %s to %s\n",
-                                      connector->base.id,
-                                      drm_get_connector_name(connector),
-                                      old, new);
-
-                        changed = true;
-                }
-        }
-
-        mutex_unlock(&dev->mode_config.mutex);
-
-        if (changed)
-                drm_kms_helper_hotplug_event(dev);
-
-        if (repoll)
-                schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD);
-}
-
-/**
- * drm_kms_helper_poll_disable - disable output polling
- * @dev: drm_device
- *
- * This function disables the output polling work.
- *
- * Drivers can call this helper from their device suspend implementation. It is
- * not an error to call this even when output polling isn't enabled or arlready
- * disabled.
- */
-void drm_kms_helper_poll_disable(struct drm_device *dev)
-{
-        if (!dev->mode_config.poll_enabled)
-                return;
-        cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
-}
-EXPORT_SYMBOL(drm_kms_helper_poll_disable);
-
-/**
- * drm_kms_helper_poll_enable - re-enable output polling.
- * @dev: drm_device
- *
- * This function re-enables the output polling work.
- *
- * Drivers can call this helper from their device resume implementation. It is
- * an error to call this when the output polling support has not yet been set
- * up.
- */
-void drm_kms_helper_poll_enable(struct drm_device *dev)
-{
-        bool poll = false;
-        struct drm_connector *connector;
-
-        if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
-                return;
-
-        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-                if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT |
-                                         DRM_CONNECTOR_POLL_DISCONNECT))
-                        poll = true;
-        }
-
-        if (poll)
-                schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
-}
-EXPORT_SYMBOL(drm_kms_helper_poll_enable);
-
-/**
- * drm_kms_helper_poll_init - initialize and enable output polling
- * @dev: drm_device
- *
- * This function intializes and then also enables output polling support for
- * @dev. Drivers which do not have reliable hotplug support in hardware can use
- * this helper infrastructure to regularly poll such connectors for changes in
- * their connection state.
- *
- * Drivers can control which connectors are polled by setting the
- * DRM_CONNECTOR_POLL_CONNECT and DRM_CONNECTOR_POLL_DISCONNECT flags. On
- * connectors where probing live outputs can result in visual distortion drivers
- * should not set the DRM_CONNECTOR_POLL_DISCONNECT flag to avoid this.
- * Connectors which have no flag or only DRM_CONNECTOR_POLL_HPD set are
- * completely ignored by the polling logic.
- *
- * Note that a connector can be both polled and probed from the hotplug handler,
- * in case the hotplug interrupt is known to be unreliable.
- */
-void drm_kms_helper_poll_init(struct drm_device *dev)
-{
-        INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
-        dev->mode_config.poll_enabled = true;
-
-        drm_kms_helper_poll_enable(dev);
-}
-EXPORT_SYMBOL(drm_kms_helper_poll_init);
-
-/**
- * drm_kms_helper_poll_fini - disable output polling and clean it up
- * @dev: drm_device
- */
-void drm_kms_helper_poll_fini(struct drm_device *dev)
-{
-        drm_kms_helper_poll_disable(dev);
-}
-EXPORT_SYMBOL(drm_kms_helper_poll_fini);
-
-/**
- * drm_helper_hpd_irq_event - hotplug processing
- * @dev: drm_device
- *
- * Drivers can use this helper function to run a detect cycle on all connectors
- * which have the DRM_CONNECTOR_POLL_HPD flag set in their &polled member. All
- * other connectors are ignored, which is useful to avoid reprobing fixed
- * panels.
- *
- * This helper function is useful for drivers which can't or don't track hotplug
- * interrupts for each connector.
- *
- * Drivers which support hotplug interrupts for each connector individually and
- * which have a more fine-grained detect logic should bypass this code and
- * directly call drm_kms_helper_hotplug_event() in case the connector state
- * changed.
- *
- * This function must be called from process context with no mode
- * setting locks held.
- *
- * Note that a connector can be both polled and probed from the hotplug handler,
- * in case the hotplug interrupt is known to be unreliable.
- */
-bool drm_helper_hpd_irq_event(struct drm_device *dev)
-{
-        struct drm_connector *connector;
-        enum drm_connector_status old_status;
-        bool changed = false;
-
-        if (!dev->mode_config.poll_enabled)
-                return false;
-
-        mutex_lock(&dev->mode_config.mutex);
-        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-
-                /* Only handle HPD capable connectors. */
-                if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))
-                        continue;
-
-                old_status = connector->status;
-
-                connector->status = connector->funcs->detect(connector, false);
-                DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
-                              connector->base.id,
-                              drm_get_connector_name(connector),
-                              drm_get_connector_status_name(old_status),
-                              drm_get_connector_status_name(connector->status));
-                if (old_status != connector->status)
-                        changed = true;
-        }
-
-        mutex_unlock(&dev->mode_config.mutex);
-
-        if (changed)
-                drm_kms_helper_hotplug_event(dev);
-
-        return changed;
-}
-EXPORT_SYMBOL(drm_helper_hpd_irq_event);