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22#include <linux/of_graph.h>
23
24#include <drm/drmP.h>
25#include <drm/drm_panel.h>
26
27#include "atmel_hlcdc_dc.h"
28
29
30
31
32enum atmel_hlcdc_connector_rgb_mode {
33 ATMEL_HLCDC_CONNECTOR_RGB444,
34 ATMEL_HLCDC_CONNECTOR_RGB565,
35 ATMEL_HLCDC_CONNECTOR_RGB666,
36 ATMEL_HLCDC_CONNECTOR_RGB888,
37};
38
39
40
41
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43
44
45
46
47
48
49struct atmel_hlcdc_rgb_output {
50 struct drm_connector connector;
51 struct drm_encoder encoder;
52 struct atmel_hlcdc_dc *dc;
53 int dpms;
54};
55
56static inline struct atmel_hlcdc_rgb_output *
57drm_connector_to_atmel_hlcdc_rgb_output(struct drm_connector *connector)
58{
59 return container_of(connector, struct atmel_hlcdc_rgb_output,
60 connector);
61}
62
63static inline struct atmel_hlcdc_rgb_output *
64drm_encoder_to_atmel_hlcdc_rgb_output(struct drm_encoder *encoder)
65{
66 return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder);
67}
68
69
70
71
72
73
74
75
76
77
78struct atmel_hlcdc_panel {
79 struct atmel_hlcdc_rgb_output base;
80 struct drm_panel *panel;
81};
82
83static inline struct atmel_hlcdc_panel *
84atmel_hlcdc_rgb_output_to_panel(struct atmel_hlcdc_rgb_output *output)
85{
86 return container_of(output, struct atmel_hlcdc_panel, base);
87}
88
89static void atmel_hlcdc_panel_encoder_enable(struct drm_encoder *encoder)
90{
91 struct atmel_hlcdc_rgb_output *rgb =
92 drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
93 struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
94
95 drm_panel_enable(panel->panel);
96}
97
98static void atmel_hlcdc_panel_encoder_disable(struct drm_encoder *encoder)
99{
100 struct atmel_hlcdc_rgb_output *rgb =
101 drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
102 struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
103
104 drm_panel_disable(panel->panel);
105}
106
107static bool
108atmel_hlcdc_panel_encoder_mode_fixup(struct drm_encoder *encoder,
109 const struct drm_display_mode *mode,
110 struct drm_display_mode *adjusted)
111{
112 return true;
113}
114
115static void
116atmel_hlcdc_rgb_encoder_mode_set(struct drm_encoder *encoder,
117 struct drm_display_mode *mode,
118 struct drm_display_mode *adjusted)
119{
120 struct atmel_hlcdc_rgb_output *rgb =
121 drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
122 struct drm_display_info *info = &rgb->connector.display_info;
123 unsigned int cfg;
124
125 cfg = 0;
126
127 if (info->num_bus_formats) {
128 switch (info->bus_formats[0]) {
129 case MEDIA_BUS_FMT_RGB666_1X18:
130 cfg |= ATMEL_HLCDC_CONNECTOR_RGB666 << 8;
131 break;
132 case MEDIA_BUS_FMT_RGB888_1X24:
133 cfg |= ATMEL_HLCDC_CONNECTOR_RGB888 << 8;
134 break;
135 default:
136 break;
137 }
138 }
139
140 regmap_update_bits(rgb->dc->hlcdc->regmap, ATMEL_HLCDC_CFG(5),
141 ATMEL_HLCDC_MODE_MASK,
142 cfg);
143}
144
145static struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = {
146 .mode_fixup = atmel_hlcdc_panel_encoder_mode_fixup,
147 .mode_set = atmel_hlcdc_rgb_encoder_mode_set,
148 .disable = atmel_hlcdc_panel_encoder_disable,
149 .enable = atmel_hlcdc_panel_encoder_enable,
150};
151
152static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder)
153{
154 drm_encoder_cleanup(encoder);
155 memset(encoder, 0, sizeof(*encoder));
156}
157
158static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
159 .destroy = atmel_hlcdc_rgb_encoder_destroy,
160};
161
162static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector)
163{
164 struct atmel_hlcdc_rgb_output *rgb =
165 drm_connector_to_atmel_hlcdc_rgb_output(connector);
166 struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
167
168 return panel->panel->funcs->get_modes(panel->panel);
169}
170
171static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector,
172 struct drm_display_mode *mode)
173{
174 struct atmel_hlcdc_rgb_output *rgb =
175 drm_connector_to_atmel_hlcdc_rgb_output(connector);
176
177 return atmel_hlcdc_dc_mode_valid(rgb->dc, mode);
178}
179
180
181
182static struct drm_encoder *
183atmel_hlcdc_rgb_best_encoder(struct drm_connector *connector)
184{
185 struct atmel_hlcdc_rgb_output *rgb =
186 drm_connector_to_atmel_hlcdc_rgb_output(connector);
187
188 return &rgb->encoder;
189}
190
191static struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helper_funcs = {
192 .get_modes = atmel_hlcdc_panel_get_modes,
193 .mode_valid = atmel_hlcdc_rgb_mode_valid,
194 .best_encoder = atmel_hlcdc_rgb_best_encoder,
195};
196
197static enum drm_connector_status
198atmel_hlcdc_panel_connector_detect(struct drm_connector *connector, bool force)
199{
200 return connector_status_connected;
201}
202
203static void
204atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector)
205{
206 struct atmel_hlcdc_rgb_output *rgb =
207 drm_connector_to_atmel_hlcdc_rgb_output(connector);
208 struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
209
210 drm_panel_detach(panel->panel);
211 drm_connector_cleanup(connector);
212}
213
214static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = {
215 .dpms = drm_atomic_helper_connector_dpms,
216 .detect = atmel_hlcdc_panel_connector_detect,
217 .fill_modes = drm_helper_probe_single_connector_modes,
218 .destroy = atmel_hlcdc_panel_connector_destroy,
219 .reset = drm_atomic_helper_connector_reset,
220 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
221 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
222};
223
224static int atmel_hlcdc_create_panel_output(struct drm_device *dev,
225 struct of_endpoint *ep)
226{
227 struct atmel_hlcdc_dc *dc = dev->dev_private;
228 struct device_node *np;
229 struct drm_panel *p = NULL;
230 struct atmel_hlcdc_panel *panel;
231 int ret;
232
233 np = of_graph_get_remote_port_parent(ep->local_node);
234 if (!np)
235 return -EINVAL;
236
237 p = of_drm_find_panel(np);
238 of_node_put(np);
239
240 if (!p)
241 return -EPROBE_DEFER;
242
243 panel = devm_kzalloc(dev->dev, sizeof(*panel), GFP_KERNEL);
244 if (!panel)
245 return -EINVAL;
246
247 panel->base.dpms = DRM_MODE_DPMS_OFF;
248
249 panel->base.dc = dc;
250
251 drm_encoder_helper_add(&panel->base.encoder,
252 &atmel_hlcdc_panel_encoder_helper_funcs);
253 ret = drm_encoder_init(dev, &panel->base.encoder,
254 &atmel_hlcdc_panel_encoder_funcs,
255 DRM_MODE_ENCODER_LVDS);
256 if (ret)
257 return ret;
258
259 panel->base.connector.dpms = DRM_MODE_DPMS_OFF;
260 panel->base.connector.polled = DRM_CONNECTOR_POLL_CONNECT;
261 drm_connector_helper_add(&panel->base.connector,
262 &atmel_hlcdc_panel_connector_helper_funcs);
263 ret = drm_connector_init(dev, &panel->base.connector,
264 &atmel_hlcdc_panel_connector_funcs,
265 DRM_MODE_CONNECTOR_LVDS);
266 if (ret)
267 goto err_encoder_cleanup;
268
269 drm_mode_connector_attach_encoder(&panel->base.connector,
270 &panel->base.encoder);
271 panel->base.encoder.possible_crtcs = 0x1;
272
273 drm_panel_attach(p, &panel->base.connector);
274 panel->panel = p;
275
276 return 0;
277
278err_encoder_cleanup:
279 drm_encoder_cleanup(&panel->base.encoder);
280
281 return ret;
282}
283
284int atmel_hlcdc_create_outputs(struct drm_device *dev)
285{
286 struct device_node *port_np, *np;
287 struct of_endpoint ep;
288 int ret;
289
290 port_np = of_get_child_by_name(dev->dev->of_node, "port");
291 if (!port_np)
292 return -EINVAL;
293
294 np = of_get_child_by_name(port_np, "endpoint");
295 of_node_put(port_np);
296
297 if (!np)
298 return -EINVAL;
299
300 ret = of_graph_parse_endpoint(np, &ep);
301 of_node_put(port_np);
302
303 if (ret)
304 return ret;
305
306
307 return atmel_hlcdc_create_panel_output(dev, &ep);
308}
309
