/*
 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
 * Copyright (c) 2007, 2010 Intel Corporation
 *   Jesse Barnes <jesse.barnes@intel.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include <linux/i2c.h>
#include <linux/slab.h>

#include <drm/drm_atomic_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>

#include "intel_connector.h"
#include "intel_display_core.h"
#include "intel_display_debugfs.h"
#include "intel_display_types.h"
#include "intel_hdcp.h"
#include "intel_panel.h"

static void intel_connector_modeset_retry_work_fn(struct work_struct *work)
{
        struct intel_connector *connector = container_of(work, typeof(*connector),
                                                         modeset_retry_work);
        struct intel_display *display = to_intel_display(connector);

        drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s]\n", connector->base.base.id,
                    connector->base.name);

        /* Grab the locks before changing connector property*/
        mutex_lock(&display->drm->mode_config.mutex);
        /* Set connector link status to BAD and send a Uevent to notify
         * userspace to do a modeset.
         */
        drm_connector_set_link_status_property(&connector->base,
                                               DRM_MODE_LINK_STATUS_BAD);
        mutex_unlock(&display->drm->mode_config.mutex);
        /* Send Hotplug uevent so userspace can reprobe */
        drm_kms_helper_connector_hotplug_event(&connector->base);

        drm_connector_put(&connector->base);
}

void intel_connector_queue_modeset_retry_work(struct intel_connector *connector)
{
        struct intel_display *display = to_intel_display(connector);

        drm_connector_get(&connector->base);
        if (!queue_work(display->wq.unordered, &connector->modeset_retry_work))
                drm_connector_put(&connector->base);
}

void intel_connector_cancel_modeset_retry_work(struct intel_connector *connector)
{
        if (cancel_work_sync(&connector->modeset_retry_work))
                drm_connector_put(&connector->base);
}

static int intel_connector_init(struct intel_connector *connector)
{
        struct intel_digital_connector_state *conn_state;

        /*
         * Allocate enough memory to hold intel_digital_connector_state,
         * This might be a few bytes too many, but for connectors that don't
         * need it we'll free the state and allocate a smaller one on the first
         * successful commit anyway.
         */
        conn_state = kzalloc_obj(*conn_state);
        if (!conn_state)
                return -ENOMEM;

        __drm_atomic_helper_connector_reset(&connector->base,
                                            &conn_state->base);

        intel_panel_init_alloc(connector);

        INIT_WORK(&connector->modeset_retry_work,
                  intel_connector_modeset_retry_work_fn);

        return 0;
}

struct intel_connector *intel_connector_alloc(void)
{
        struct intel_connector *connector;

        connector = kzalloc_obj(*connector);
        if (!connector)
                return NULL;

        if (intel_connector_init(connector) < 0) {
                kfree(connector);
                return NULL;
        }

        return connector;
}

/*
 * Free the bits allocated by intel_connector_alloc.
 * This should only be used after intel_connector_alloc has returned
 * successfully, and before drm_connector_init returns successfully.
 * Otherwise the destroy callbacks for the connector and the state should
 * take care of proper cleanup/free (see intel_connector_destroy).
 */
void intel_connector_free(struct intel_connector *connector)
{
        kfree(to_intel_digital_connector_state(connector->base.state));
        kfree(connector);
}

/*
 * Connector type independent destroy hook for drm_connector_funcs.
 */
void intel_connector_destroy(struct drm_connector *connector)
{
        struct intel_connector *intel_connector = to_intel_connector(connector);

        drm_edid_free(intel_connector->detect_edid);

        intel_hdcp_cleanup(intel_connector);

        intel_panel_fini(intel_connector);

        drm_connector_cleanup(connector);

        if (intel_connector->mst.port)
                drm_dp_mst_put_port_malloc(intel_connector->mst.port);

        kfree(connector);
}

int intel_connector_register(struct drm_connector *_connector)
{
        struct intel_connector *connector = to_intel_connector(_connector);
        int ret;

        ret = intel_panel_register(connector);
        if (ret)
                return ret;

        intel_connector_debugfs_add(connector);

        return 0;
}
ALLOW_ERROR_INJECTION(intel_connector_register, ERRNO);

void intel_connector_unregister(struct drm_connector *_connector)
{
        struct intel_connector *connector = to_intel_connector(_connector);

        intel_panel_unregister(connector);
}

void intel_connector_attach_encoder(struct intel_connector *connector,
                                    struct intel_encoder *encoder)
{
        connector->encoder = encoder;
        drm_connector_attach_encoder(&connector->base, &encoder->base);
}

/*
 * Simple connector->get_hw_state implementation for encoders that support only
 * one connector and no cloning and hence the encoder state determines the state
 * of the connector.
 */
bool intel_connector_get_hw_state(struct intel_connector *connector)
{
        enum pipe pipe = 0;
        struct intel_encoder *encoder = intel_attached_encoder(connector);

        return encoder->get_hw_state(encoder, &pipe);
}

enum pipe intel_connector_get_pipe(struct intel_connector *connector)
{
        struct intel_display *display = to_intel_display(connector);

        drm_modeset_lock_assert_held(&display->drm->mode_config.connection_mutex);

        if (!connector->base.state->crtc)
                return INVALID_PIPE;

        return to_intel_crtc(connector->base.state->crtc)->pipe;
}

/**
 * intel_connector_update_modes - update connector from edid
 * @connector: DRM connector device to use
 * @drm_edid: previously read EDID information
 */
int intel_connector_update_modes(struct drm_connector *connector,
                                 const struct drm_edid *drm_edid)
{
        int ret;

        drm_edid_connector_update(connector, drm_edid);
        ret = drm_edid_connector_add_modes(connector);

        return ret;
}

/**
 * intel_ddc_get_modes - get modelist from monitor
 * @connector: DRM connector device to use
 * @ddc: DDC bus i2c adapter
 *
 * Fetch the EDID information from @connector using the DDC bus.
 */
int intel_ddc_get_modes(struct drm_connector *connector,
                        struct i2c_adapter *ddc)
{
        const struct drm_edid *drm_edid;
        int ret;

        drm_edid = drm_edid_read_ddc(connector, ddc);
        if (!drm_edid)
                return 0;

        ret = intel_connector_update_modes(connector, drm_edid);
        drm_edid_free(drm_edid);

        return ret;
}

static const struct drm_prop_enum_list force_audio_names[] = {
        { HDMI_AUDIO_OFF_DVI, "force-dvi" },
        { HDMI_AUDIO_OFF, "off" },
        { HDMI_AUDIO_AUTO, "auto" },
        { HDMI_AUDIO_ON, "on" },
};

void
intel_attach_force_audio_property(struct drm_connector *connector)
{
        struct intel_display *display = to_intel_display(connector->dev);
        struct drm_property *prop;

        prop = display->properties.force_audio;
        if (prop == NULL) {
                prop = drm_property_create_enum(display->drm, 0,
                                                "audio",
                                                force_audio_names,
                                                ARRAY_SIZE(force_audio_names));
                if (prop == NULL)
                        return;

                display->properties.force_audio = prop;
        }
        drm_object_attach_property(&connector->base, prop, 0);
}

static const struct drm_prop_enum_list broadcast_rgb_names[] = {
        { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
        { INTEL_BROADCAST_RGB_FULL, "Full" },
        { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
};

void
intel_attach_broadcast_rgb_property(struct drm_connector *connector)
{
        struct intel_display *display = to_intel_display(connector->dev);
        struct drm_property *prop;

        prop = display->properties.broadcast_rgb;
        if (prop == NULL) {
                prop = drm_property_create_enum(display->drm, DRM_MODE_PROP_ENUM,
                                                "Broadcast RGB",
                                                broadcast_rgb_names,
                                                ARRAY_SIZE(broadcast_rgb_names));
                if (prop == NULL)
                        return;

                display->properties.broadcast_rgb = prop;
        }

        drm_object_attach_property(&connector->base, prop, 0);
}

void
intel_attach_aspect_ratio_property(struct drm_connector *connector)
{
        if (!drm_mode_create_aspect_ratio_property(connector->dev))
                drm_object_attach_property(&connector->base,
                        connector->dev->mode_config.aspect_ratio_property,
                        DRM_MODE_PICTURE_ASPECT_NONE);
}

void
intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
{
        if (!drm_mode_create_hdmi_colorspace_property(connector, 0))
                drm_connector_attach_colorspace_property(connector);
}

void
intel_attach_dp_colorspace_property(struct drm_connector *connector)
{
        if (!drm_mode_create_dp_colorspace_property(connector, 0))
                drm_connector_attach_colorspace_property(connector);
}

void
intel_attach_scaling_mode_property(struct drm_connector *connector)
{
        struct intel_display *display = to_intel_display(connector->dev);
        u32 scaling_modes;

        scaling_modes = BIT(DRM_MODE_SCALE_ASPECT) |
                BIT(DRM_MODE_SCALE_FULLSCREEN);

        /* On GMCH platforms borders are only possible on the LVDS port */
        if (!HAS_GMCH(display) || connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
                scaling_modes |= BIT(DRM_MODE_SCALE_CENTER);

        drm_connector_attach_scaling_mode_property(connector, scaling_modes);

        connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
}