1/*
  2 * rcar_du_lvdscon.c  --  R-Car Display Unit LVDS Connector
  3 *
  4 * Copyright (C) 2013-2014 Renesas Electronics Corporation
  5 *
  6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
  7 *
  8 * This program is free software; you can redistribute it and/or modify
  9 * it under the terms of the GNU General Public License as published by
 10 * the Free Software Foundation; either version 2 of the License, or
 11 * (at your option) any later version.
 12 */
 13
 14#include <drm/drmP.h>
 15#include <drm/drm_atomic_helper.h>
 16#include <drm/drm_crtc.h>
 17#include <drm/drm_crtc_helper.h>
 18
 19#include <video/display_timing.h>
 20#include <video/of_display_timing.h>
 21#include <video/videomode.h>
 22
 23#include "rcar_du_drv.h"
 24#include "rcar_du_encoder.h"
 25#include "rcar_du_kms.h"
 26#include "rcar_du_lvdscon.h"
 27
 28struct rcar_du_lvds_connector {
 29	struct rcar_du_connector connector;
 30
 31	struct {
 32		unsigned int width_mm;		/* Panel width in mm */
 33		unsigned int height_mm;		/* Panel height in mm */
 34		struct videomode mode;
 35	} panel;
 36};
 37
 38#define to_rcar_lvds_connector(c) \
 39	container_of(c, struct rcar_du_lvds_connector, connector.connector)
 40
 41static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
 42{
 43	struct rcar_du_lvds_connector *lvdscon =
 44		to_rcar_lvds_connector(connector);
 45	struct drm_display_mode *mode;
 46
 47	mode = drm_mode_create(connector->dev);
 48	if (mode == NULL)
 49		return 0;
 50
 51	mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
 52
 53	drm_display_mode_from_videomode(&lvdscon->panel.mode, mode);
 54
 55	drm_mode_probed_add(connector, mode);
 56
 57	return 1;
 58}
 59
 60static const struct drm_connector_helper_funcs connector_helper_funcs = {
 61	.get_modes = rcar_du_lvds_connector_get_modes,
 62	.best_encoder = rcar_du_connector_best_encoder,
 63};
 64
 65static enum drm_connector_status
 66rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
 67{
 68	return connector_status_connected;
 69}
 70
 71static const struct drm_connector_funcs connector_funcs = {
 72	.dpms = drm_atomic_helper_connector_dpms,
 73	.reset = drm_atomic_helper_connector_reset,
 74	.detect = rcar_du_lvds_connector_detect,
 75	.fill_modes = drm_helper_probe_single_connector_modes,
 76	.destroy = drm_connector_cleanup,
 77	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 78	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 79};
 80
 81int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
 82				struct rcar_du_encoder *renc,
 83				/* TODO const */ struct device_node *np)
 84{
 85	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
 86	struct rcar_du_lvds_connector *lvdscon;
 87	struct drm_connector *connector;
 88	struct display_timing timing;
 89	int ret;
 90
 91	lvdscon = devm_kzalloc(rcdu->dev, sizeof(*lvdscon), GFP_KERNEL);
 92	if (lvdscon == NULL)
 93		return -ENOMEM;
 94
 95	ret = of_get_display_timing(np, "panel-timing", &timing);
 96	if (ret < 0)
 97		return ret;
 98
 99	videomode_from_timing(&timing, &lvdscon->panel.mode);
100
101	of_property_read_u32(np, "width-mm", &lvdscon->panel.width_mm);
102	of_property_read_u32(np, "height-mm", &lvdscon->panel.height_mm);
103
104	connector = &lvdscon->connector.connector;
105	connector->display_info.width_mm = lvdscon->panel.width_mm;
106	connector->display_info.height_mm = lvdscon->panel.height_mm;
107
108	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
109				 DRM_MODE_CONNECTOR_LVDS);
110	if (ret < 0)
111		return ret;
112
113	drm_connector_helper_add(connector, &connector_helper_funcs);
114
115	connector->dpms = DRM_MODE_DPMS_OFF;
116	drm_object_property_set_value(&connector->base,
117		rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
118
119	ret = drm_mode_connector_attach_encoder(connector, encoder);
120	if (ret < 0)
121		return ret;
122
123	lvdscon->connector.encoder = renc;
124
125	return 0;
126}