1/*
  2 * Copyright 2015 Freescale Semiconductor, Inc.
  3 *
  4 * Freescale DCU drm device driver
  5 *
  6 * This program is free software; you can redistribute it and/or modify
  7 * it under the terms of the GNU General Public License as published by
  8 * the Free Software Foundation; either version 2 of the License, or
  9 * (at your option) any later version.
 10 */
 11
 12#include <linux/backlight.h>
 
 13
 14#include <drm/drmP.h>
 15#include <drm/drm_atomic_helper.h>
 16#include <drm/drm_crtc_helper.h>
 
 17#include <drm/drm_panel.h>
 
 
 18
 19#include "fsl_dcu_drm_drv.h"
 20
 21static int
 22fsl_dcu_drm_encoder_atomic_check(struct drm_encoder *encoder,
 23				 struct drm_crtc_state *crtc_state,
 24				 struct drm_connector_state *conn_state)
 25{
 26	return 0;
 27}
 28
 29static void fsl_dcu_drm_encoder_disable(struct drm_encoder *encoder)
 30{
 31}
 32
 33static void fsl_dcu_drm_encoder_enable(struct drm_encoder *encoder)
 34{
 35}
 36
 37static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
 38	.atomic_check = fsl_dcu_drm_encoder_atomic_check,
 39	.disable = fsl_dcu_drm_encoder_disable,
 40	.enable = fsl_dcu_drm_encoder_enable,
 41};
 42
 43static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
 44{
 45	drm_encoder_cleanup(encoder);
 46}
 47
 48static const struct drm_encoder_funcs encoder_funcs = {
 49	.destroy = fsl_dcu_drm_encoder_destroy,
 50};
 51
 52int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
 53			       struct drm_crtc *crtc)
 54{
 55	struct drm_encoder *encoder = &fsl_dev->encoder;
 56	int ret;
 57
 58	encoder->possible_crtcs = 1;
 59	ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
 60			       DRM_MODE_ENCODER_LVDS, NULL);
 
 
 
 
 
 61	if (ret < 0)
 62		return ret;
 63
 64	drm_encoder_helper_add(encoder, &encoder_helper_funcs);
 65
 66	return 0;
 67}
 68
 69static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
 70{
 
 
 71	drm_connector_unregister(connector);
 
 72	drm_connector_cleanup(connector);
 73}
 74
 75static enum drm_connector_status
 76fsl_dcu_drm_connector_detect(struct drm_connector *connector, bool force)
 77{
 78	return connector_status_connected;
 79}
 80
 81static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
 82	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 83	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 84	.destroy = fsl_dcu_drm_connector_destroy,
 85	.detect = fsl_dcu_drm_connector_detect,
 86	.dpms = drm_atomic_helper_connector_dpms,
 87	.fill_modes = drm_helper_probe_single_connector_modes,
 88	.reset = drm_atomic_helper_connector_reset,
 89};
 90
 91static struct drm_encoder *
 92fsl_dcu_drm_connector_best_encoder(struct drm_connector *connector)
 93{
 94	struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
 95
 96	return fsl_con->encoder;
 97}
 98
 99static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
100{
101	struct fsl_dcu_drm_connector *fsl_connector;
102	int (*get_modes)(struct drm_panel *panel);
103	int num_modes = 0;
104
105	fsl_connector = to_fsl_dcu_connector(connector);
106	if (fsl_connector->panel && fsl_connector->panel->funcs &&
107	    fsl_connector->panel->funcs->get_modes) {
108		get_modes = fsl_connector->panel->funcs->get_modes;
109		num_modes = get_modes(fsl_connector->panel);
110	}
111
112	return num_modes;
113}
114
115static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
116					    struct drm_display_mode *mode)
117{
118	if (mode->hdisplay & 0xf)
119		return MODE_ERROR;
120
121	return MODE_OK;
122}
123
124static const struct drm_connector_helper_funcs connector_helper_funcs = {
125	.best_encoder = fsl_dcu_drm_connector_best_encoder,
126	.get_modes = fsl_dcu_drm_connector_get_modes,
127	.mode_valid = fsl_dcu_drm_connector_mode_valid,
128};
129
130int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
131				 struct drm_encoder *encoder)
132{
 
133	struct drm_connector *connector = &fsl_dev->connector.base;
134	struct drm_mode_config mode_config = fsl_dev->drm->mode_config;
135	struct device_node *panel_node;
136	int ret;
137
138	fsl_dev->connector.encoder = encoder;
139
140	ret = drm_connector_init(fsl_dev->drm, connector,
141				 &fsl_dcu_drm_connector_funcs,
142				 DRM_MODE_CONNECTOR_LVDS);
143	if (ret < 0)
144		return ret;
145
146	drm_connector_helper_add(connector, &connector_helper_funcs);
147	ret = drm_connector_register(connector);
148	if (ret < 0)
149		goto err_cleanup;
150
151	ret = drm_mode_connector_attach_encoder(connector, encoder);
152	if (ret < 0)
153		goto err_sysfs;
154
155	drm_object_property_set_value(&connector->base,
156				      mode_config.dpms_property,
157				      DRM_MODE_DPMS_OFF);
158
159	panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
160	if (panel_node) {
161		fsl_dev->connector.panel = of_drm_find_panel(panel_node);
162		if (!fsl_dev->connector.panel) {
163			ret = -EPROBE_DEFER;
164			goto err_sysfs;
165		}
166	of_node_put(panel_node);
167	}
168
169	ret = drm_panel_attach(fsl_dev->connector.panel, connector);
170	if (ret) {
171		dev_err(fsl_dev->dev, "failed to attach panel\n");
172		goto err_sysfs;
173	}
174
175	return 0;
176
177err_sysfs:
178	drm_connector_unregister(connector);
179err_cleanup:
180	drm_connector_cleanup(connector);
181	return ret;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
182}

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Copyright 2015 Freescale Semiconductor, Inc.
  4 *
  5 * Freescale DCU drm device driver
 
 
 
 
 
  6 */
  7
  8#include <linux/backlight.h>
  9#include <linux/of_graph.h>
 10
 
 11#include <drm/drm_atomic_helper.h>
 12#include <drm/drm_bridge.h>
 13#include <drm/drm_of.h>
 14#include <drm/drm_panel.h>
 15#include <drm/drm_probe_helper.h>
 16#include <drm/drm_simple_kms_helper.h>
 17
 18#include "fsl_dcu_drm_drv.h"
 19#include "fsl_tcon.h"
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 20
 21int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
 22			       struct drm_crtc *crtc)
 23{
 24	struct drm_encoder *encoder = &fsl_dev->encoder;
 25	int ret;
 26
 27	encoder->possible_crtcs = 1;
 28
 29	/* Use bypass mode for parallel RGB/LVDS encoder */
 30	if (fsl_dev->tcon)
 31		fsl_tcon_bypass_enable(fsl_dev->tcon);
 32
 33	ret = drm_simple_encoder_init(fsl_dev->drm, encoder,
 34				      DRM_MODE_ENCODER_LVDS);
 35	if (ret < 0)
 36		return ret;
 37
 
 
 38	return 0;
 39}
 40
 41static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
 42{
 43	struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
 44
 45	drm_connector_unregister(connector);
 46	drm_panel_detach(fsl_con->panel);
 47	drm_connector_cleanup(connector);
 48}
 49
 
 
 
 
 
 
 50static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
 51	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 52	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 53	.destroy = fsl_dcu_drm_connector_destroy,
 
 
 54	.fill_modes = drm_helper_probe_single_connector_modes,
 55	.reset = drm_atomic_helper_connector_reset,
 56};
 57
 
 
 
 
 
 
 
 
 58static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
 59{
 60	struct fsl_dcu_drm_connector *fsl_connector;
 
 
 61
 62	fsl_connector = to_fsl_dcu_connector(connector);
 63	return drm_panel_get_modes(fsl_connector->panel, connector);
 
 
 
 
 
 
 64}
 65
 66static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
 67					    struct drm_display_mode *mode)
 68{
 69	if (mode->hdisplay & 0xf)
 70		return MODE_ERROR;
 71
 72	return MODE_OK;
 73}
 74
 75static const struct drm_connector_helper_funcs connector_helper_funcs = {
 
 76	.get_modes = fsl_dcu_drm_connector_get_modes,
 77	.mode_valid = fsl_dcu_drm_connector_mode_valid,
 78};
 79
 80static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
 81				 struct drm_panel *panel)
 82{
 83	struct drm_encoder *encoder = &fsl_dev->encoder;
 84	struct drm_connector *connector = &fsl_dev->connector.base;
 
 
 85	int ret;
 86
 87	fsl_dev->connector.encoder = encoder;
 88
 89	ret = drm_connector_init(fsl_dev->drm, connector,
 90				 &fsl_dcu_drm_connector_funcs,
 91				 DRM_MODE_CONNECTOR_LVDS);
 92	if (ret < 0)
 93		return ret;
 94
 95	drm_connector_helper_add(connector, &connector_helper_funcs);
 96	ret = drm_connector_register(connector);
 97	if (ret < 0)
 98		goto err_cleanup;
 99
100	ret = drm_connector_attach_encoder(connector, encoder);
101	if (ret < 0)
102		goto err_sysfs;
103
104	ret = drm_panel_attach(panel, connector);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
105	if (ret) {
106		dev_err(fsl_dev->dev, "failed to attach panel\n");
107		goto err_sysfs;
108	}
109
110	return 0;
111
112err_sysfs:
113	drm_connector_unregister(connector);
114err_cleanup:
115	drm_connector_cleanup(connector);
116	return ret;
117}
118
119int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
120{
121	struct device_node *panel_node;
122	struct drm_panel *panel;
123	struct drm_bridge *bridge;
124	int ret;
125
126	/* This is for backward compatibility */
127	panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
128	if (panel_node) {
129		fsl_dev->connector.panel = of_drm_find_panel(panel_node);
130		of_node_put(panel_node);
131		if (IS_ERR(fsl_dev->connector.panel))
132			return PTR_ERR(fsl_dev->connector.panel);
133
134		return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
135	}
136
137	ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
138	if (ret)
139		return ret;
140
141	if (panel) {
142		fsl_dev->connector.panel = panel;
143		return fsl_dcu_attach_panel(fsl_dev, panel);
144	}
145
146	return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL, 0);
147}