2 * Copyright 2015 Freescale Semiconductor, Inc.
4 * Freescale DCU drm device driver
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.
12 #include <linux/backlight.h>
15 #include <drm/drm_atomic_helper.h>
16 #include <drm/drm_crtc_helper.h>
17 #include <drm/drm_panel.h>
19 #include "fsl_dcu_drm_drv.h"
23 fsl_dcu_drm_encoder_atomic_check(struct drm_encoder *encoder,
24 struct drm_crtc_state *crtc_state,
25 struct drm_connector_state *conn_state)
30 static void fsl_dcu_drm_encoder_disable(struct drm_encoder *encoder)
32 struct drm_device *dev = encoder->dev;
33 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
36 fsl_tcon_bypass_disable(fsl_dev->tcon);
39 static void fsl_dcu_drm_encoder_enable(struct drm_encoder *encoder)
41 struct drm_device *dev = encoder->dev;
42 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
45 fsl_tcon_bypass_enable(fsl_dev->tcon);
48 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
49 .atomic_check = fsl_dcu_drm_encoder_atomic_check,
50 .disable = fsl_dcu_drm_encoder_disable,
51 .enable = fsl_dcu_drm_encoder_enable,
54 static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
56 drm_encoder_cleanup(encoder);
59 static const struct drm_encoder_funcs encoder_funcs = {
60 .destroy = fsl_dcu_drm_encoder_destroy,
63 int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
64 struct drm_crtc *crtc)
66 struct drm_encoder *encoder = &fsl_dev->encoder;
69 encoder->possible_crtcs = 1;
70 ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
71 DRM_MODE_ENCODER_LVDS, NULL);
75 drm_encoder_helper_add(encoder, &encoder_helper_funcs);
80 static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
82 struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
84 drm_connector_unregister(connector);
85 drm_panel_detach(fsl_con->panel);
86 drm_connector_cleanup(connector);
89 static enum drm_connector_status
90 fsl_dcu_drm_connector_detect(struct drm_connector *connector, bool force)
92 return connector_status_connected;
95 static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
96 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
97 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
98 .destroy = fsl_dcu_drm_connector_destroy,
99 .detect = fsl_dcu_drm_connector_detect,
100 .dpms = drm_atomic_helper_connector_dpms,
101 .fill_modes = drm_helper_probe_single_connector_modes,
102 .reset = drm_atomic_helper_connector_reset,
105 static struct drm_encoder *
106 fsl_dcu_drm_connector_best_encoder(struct drm_connector *connector)
108 struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
110 return fsl_con->encoder;
113 static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
115 struct fsl_dcu_drm_connector *fsl_connector;
116 int (*get_modes)(struct drm_panel *panel);
119 fsl_connector = to_fsl_dcu_connector(connector);
120 if (fsl_connector->panel && fsl_connector->panel->funcs &&
121 fsl_connector->panel->funcs->get_modes) {
122 get_modes = fsl_connector->panel->funcs->get_modes;
123 num_modes = get_modes(fsl_connector->panel);
129 static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
130 struct drm_display_mode *mode)
132 if (mode->hdisplay & 0xf)
138 static const struct drm_connector_helper_funcs connector_helper_funcs = {
139 .best_encoder = fsl_dcu_drm_connector_best_encoder,
140 .get_modes = fsl_dcu_drm_connector_get_modes,
141 .mode_valid = fsl_dcu_drm_connector_mode_valid,
144 int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
145 struct drm_encoder *encoder)
147 struct drm_connector *connector = &fsl_dev->connector.base;
148 struct drm_mode_config *mode_config = &fsl_dev->drm->mode_config;
149 struct device_node *panel_node;
152 fsl_dev->connector.encoder = encoder;
154 ret = drm_connector_init(fsl_dev->drm, connector,
155 &fsl_dcu_drm_connector_funcs,
156 DRM_MODE_CONNECTOR_LVDS);
160 drm_connector_helper_add(connector, &connector_helper_funcs);
161 ret = drm_connector_register(connector);
165 ret = drm_mode_connector_attach_encoder(connector, encoder);
169 drm_object_property_set_value(&connector->base,
170 mode_config->dpms_property,
173 panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
175 dev_err(fsl_dev->dev, "fsl,panel property not found\n");
180 fsl_dev->connector.panel = of_drm_find_panel(panel_node);
181 if (!fsl_dev->connector.panel) {
185 of_node_put(panel_node);
187 ret = drm_panel_attach(fsl_dev->connector.panel, connector);
189 dev_err(fsl_dev->dev, "failed to attach panel\n");
196 of_node_put(panel_node);
198 drm_connector_unregister(connector);
200 drm_connector_cleanup(connector);