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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
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41
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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_RGB565_1X16:
130 cfg |= ATMEL_HLCDC_CONNECTOR_RGB565 << 8;
131 break;
132 case MEDIA_BUS_FMT_RGB666_1X18:
133 cfg |= ATMEL_HLCDC_CONNECTOR_RGB666 << 8;
134 break;
135 case MEDIA_BUS_FMT_RGB888_1X24:
136 cfg |= ATMEL_HLCDC_CONNECTOR_RGB888 << 8;
137 break;
138 case MEDIA_BUS_FMT_RGB444_1X12:
139 default:
140 break;
141 }
142 }
143
144 regmap_update_bits(rgb->dc->hlcdc->regmap, ATMEL_HLCDC_CFG(5),
145 ATMEL_HLCDC_MODE_MASK,
146 cfg);
147}
148
149static const struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = {
150 .mode_fixup = atmel_hlcdc_panel_encoder_mode_fixup,
151 .mode_set = atmel_hlcdc_rgb_encoder_mode_set,
152 .disable = atmel_hlcdc_panel_encoder_disable,
153 .enable = atmel_hlcdc_panel_encoder_enable,
154};
155
156static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder)
157{
158 drm_encoder_cleanup(encoder);
159 memset(encoder, 0, sizeof(*encoder));
160}
161
162static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
163 .destroy = atmel_hlcdc_rgb_encoder_destroy,
164};
165
166static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector)
167{
168 struct atmel_hlcdc_rgb_output *rgb =
169 drm_connector_to_atmel_hlcdc_rgb_output(connector);
170 struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
171
172 return panel->panel->funcs->get_modes(panel->panel);
173}
174
175static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector,
176 struct drm_display_mode *mode)
177{
178 struct atmel_hlcdc_rgb_output *rgb =
179 drm_connector_to_atmel_hlcdc_rgb_output(connector);
180
181 return atmel_hlcdc_dc_mode_valid(rgb->dc, mode);
182}
183
184
185
186static struct drm_encoder *
187atmel_hlcdc_rgb_best_encoder(struct drm_connector *connector)
188{
189 struct atmel_hlcdc_rgb_output *rgb =
190 drm_connector_to_atmel_hlcdc_rgb_output(connector);
191
192 return &rgb->encoder;
193}
194
195static const struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helper_funcs = {
196 .get_modes = atmel_hlcdc_panel_get_modes,
197 .mode_valid = atmel_hlcdc_rgb_mode_valid,
198 .best_encoder = atmel_hlcdc_rgb_best_encoder,
199};
200
201static enum drm_connector_status
202atmel_hlcdc_panel_connector_detect(struct drm_connector *connector, bool force)
203{
204 return connector_status_connected;
205}
206
207static void
208atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector)
209{
210 struct atmel_hlcdc_rgb_output *rgb =
211 drm_connector_to_atmel_hlcdc_rgb_output(connector);
212 struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
213
214 drm_panel_detach(panel->panel);
215 drm_connector_cleanup(connector);
216}
217
218static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = {
219 .dpms = drm_atomic_helper_connector_dpms,
220 .detect = atmel_hlcdc_panel_connector_detect,
221 .fill_modes = drm_helper_probe_single_connector_modes,
222 .destroy = atmel_hlcdc_panel_connector_destroy,
223 .reset = drm_atomic_helper_connector_reset,
224 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
225 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
226};
227
228static int atmel_hlcdc_create_panel_output(struct drm_device *dev,
229 struct of_endpoint *ep)
230{
231 struct atmel_hlcdc_dc *dc = dev->dev_private;
232 struct device_node *np;
233 struct drm_panel *p = NULL;
234 struct atmel_hlcdc_panel *panel;
235 int ret;
236
237 np = of_graph_get_remote_port_parent(ep->local_node);
238 if (!np)
239 return -EINVAL;
240
241 p = of_drm_find_panel(np);
242 of_node_put(np);
243
244 if (!p)
245 return -EPROBE_DEFER;
246
247 panel = devm_kzalloc(dev->dev, sizeof(*panel), GFP_KERNEL);
248 if (!panel)
249 return -EINVAL;
250
251 panel->base.dpms = DRM_MODE_DPMS_OFF;
252
253 panel->base.dc = dc;
254
255 drm_encoder_helper_add(&panel->base.encoder,
256 &atmel_hlcdc_panel_encoder_helper_funcs);
257 ret = drm_encoder_init(dev, &panel->base.encoder,
258 &atmel_hlcdc_panel_encoder_funcs,
259 DRM_MODE_ENCODER_LVDS, NULL);
260 if (ret)
261 return ret;
262
263 panel->base.connector.dpms = DRM_MODE_DPMS_OFF;
264 panel->base.connector.polled = DRM_CONNECTOR_POLL_CONNECT;
265 drm_connector_helper_add(&panel->base.connector,
266 &atmel_hlcdc_panel_connector_helper_funcs);
267 ret = drm_connector_init(dev, &panel->base.connector,
268 &atmel_hlcdc_panel_connector_funcs,
269 DRM_MODE_CONNECTOR_LVDS);
270 if (ret)
271 goto err_encoder_cleanup;
272
273 drm_mode_connector_attach_encoder(&panel->base.connector,
274 &panel->base.encoder);
275 panel->base.encoder.possible_crtcs = 0x1;
276
277 drm_panel_attach(p, &panel->base.connector);
278 panel->panel = p;
279
280 return 0;
281
282err_encoder_cleanup:
283 drm_encoder_cleanup(&panel->base.encoder);
284
285 return ret;
286}
287
288int atmel_hlcdc_create_outputs(struct drm_device *dev)
289{
290 struct device_node *port_np, *np;
291 struct of_endpoint ep;
292 int ret;
293
294 port_np = of_get_child_by_name(dev->dev->of_node, "port");
295 if (!port_np)
296 return -EINVAL;
297
298 np = of_get_child_by_name(port_np, "endpoint");
299 of_node_put(port_np);
300
301 if (!np)
302 return -EINVAL;
303
304 ret = of_graph_parse_endpoint(np, &ep);
305 of_node_put(port_np);
306
307 if (ret)
308 return ret;
309
310
311 return atmel_hlcdc_create_panel_output(dev, &ep);
312}
313
