1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16#include <linux/component.h>
17#include <linux/module.h>
18#include <drm/drmP.h>
19#include <drm/drm_fb_helper.h>
20#include <drm/drm_crtc_helper.h>
21#include <drm/drm_panel.h>
22#include <linux/videodev2.h>
23#include <video/of_display_timing.h>
24
25#include "imx-drm.h"
26
27#define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
28#define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)
29
30struct imx_parallel_display {
31 struct drm_connector connector;
32 struct drm_encoder encoder;
33 struct device *dev;
34 void *edid;
35 int edid_len;
36 u32 interface_pix_fmt;
37 int mode_valid;
38 struct drm_display_mode mode;
39 struct drm_panel *panel;
40};
41
42static enum drm_connector_status imx_pd_connector_detect(
43 struct drm_connector *connector, bool force)
44{
45 return connector_status_connected;
46}
47
48static int imx_pd_connector_get_modes(struct drm_connector *connector)
49{
50 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
51 struct device_node *np = imxpd->dev->of_node;
52 int num_modes = 0;
53
54 if (imxpd->panel && imxpd->panel->funcs &&
55 imxpd->panel->funcs->get_modes) {
56 num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
57 if (num_modes > 0)
58 return num_modes;
59 }
60
61 if (imxpd->edid) {
62 drm_mode_connector_update_edid_property(connector, imxpd->edid);
63 num_modes = drm_add_edid_modes(connector, imxpd->edid);
64 }
65
66 if (imxpd->mode_valid) {
67 struct drm_display_mode *mode = drm_mode_create(connector->dev);
68
69 if (!mode)
70 return -EINVAL;
71 drm_mode_copy(mode, &imxpd->mode);
72 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
73 drm_mode_probed_add(connector, mode);
74 num_modes++;
75 }
76
77 if (np) {
78 struct drm_display_mode *mode = drm_mode_create(connector->dev);
79
80 if (!mode)
81 return -EINVAL;
82 of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
83 drm_mode_copy(mode, &imxpd->mode);
84 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
85 drm_mode_probed_add(connector, mode);
86 num_modes++;
87 }
88
89 return num_modes;
90}
91
92static struct drm_encoder *imx_pd_connector_best_encoder(
93 struct drm_connector *connector)
94{
95 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
96
97 return &imxpd->encoder;
98}
99
100static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
101{
102 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
103
104 if (mode != DRM_MODE_DPMS_ON)
105 drm_panel_disable(imxpd->panel);
106 else
107 drm_panel_enable(imxpd->panel);
108}
109
110static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
111 const struct drm_display_mode *mode,
112 struct drm_display_mode *adjusted_mode)
113{
114 return true;
115}
116
117static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
118{
119 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
120
121 imx_drm_panel_format(encoder, imxpd->interface_pix_fmt);
122}
123
124static void imx_pd_encoder_commit(struct drm_encoder *encoder)
125{
126 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
127
128 drm_panel_prepare(imxpd->panel);
129 drm_panel_enable(imxpd->panel);
130}
131
132static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
133 struct drm_display_mode *mode,
134 struct drm_display_mode *adjusted_mode)
135{
136}
137
138static void imx_pd_encoder_disable(struct drm_encoder *encoder)
139{
140 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
141
142 drm_panel_disable(imxpd->panel);
143 drm_panel_unprepare(imxpd->panel);
144}
145
146static struct drm_connector_funcs imx_pd_connector_funcs = {
147 .dpms = drm_helper_connector_dpms,
148 .fill_modes = drm_helper_probe_single_connector_modes,
149 .detect = imx_pd_connector_detect,
150 .destroy = imx_drm_connector_destroy,
151};
152
153static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
154 .get_modes = imx_pd_connector_get_modes,
155 .best_encoder = imx_pd_connector_best_encoder,
156};
157
158static struct drm_encoder_funcs imx_pd_encoder_funcs = {
159 .destroy = imx_drm_encoder_destroy,
160};
161
162static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
163 .dpms = imx_pd_encoder_dpms,
164 .mode_fixup = imx_pd_encoder_mode_fixup,
165 .prepare = imx_pd_encoder_prepare,
166 .commit = imx_pd_encoder_commit,
167 .mode_set = imx_pd_encoder_mode_set,
168 .disable = imx_pd_encoder_disable,
169};
170
171static int imx_pd_register(struct drm_device *drm,
172 struct imx_parallel_display *imxpd)
173{
174 int ret;
175
176 ret = imx_drm_encoder_parse_of(drm, &imxpd->encoder,
177 imxpd->dev->of_node);
178 if (ret)
179 return ret;
180
181
182
183
184
185
186 imxpd->connector.dpms = DRM_MODE_DPMS_OFF;
187
188 drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
189 drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs,
190 DRM_MODE_ENCODER_NONE);
191
192 drm_connector_helper_add(&imxpd->connector,
193 &imx_pd_connector_helper_funcs);
194 drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs,
195 DRM_MODE_CONNECTOR_VGA);
196
197 if (imxpd->panel)
198 drm_panel_attach(imxpd->panel, &imxpd->connector);
199
200 drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);
201
202 imxpd->connector.encoder = &imxpd->encoder;
203
204 return 0;
205}
206
207static int imx_pd_bind(struct device *dev, struct device *master, void *data)
208{
209 struct drm_device *drm = data;
210 struct device_node *np = dev->of_node;
211 struct device_node *panel_node;
212 const u8 *edidp;
213 struct imx_parallel_display *imxpd;
214 int ret;
215 const char *fmt;
216
217 imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
218 if (!imxpd)
219 return -ENOMEM;
220
221 edidp = of_get_property(np, "edid", &imxpd->edid_len);
222 if (edidp)
223 imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
224
225 ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
226 if (!ret) {
227 if (!strcmp(fmt, "rgb24"))
228 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24;
229 else if (!strcmp(fmt, "rgb565"))
230 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565;
231 else if (!strcmp(fmt, "bgr666"))
232 imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666;
233 else if (!strcmp(fmt, "lvds666"))
234 imxpd->interface_pix_fmt =
235 v4l2_fourcc('L', 'V', 'D', '6');
236 }
237
238 panel_node = of_parse_phandle(np, "fsl,panel", 0);
239 if (panel_node)
240 imxpd->panel = of_drm_find_panel(panel_node);
241
242 imxpd->dev = dev;
243
244 ret = imx_pd_register(drm, imxpd);
245 if (ret)
246 return ret;
247
248 dev_set_drvdata(dev, imxpd);
249
250 return 0;
251}
252
253static void imx_pd_unbind(struct device *dev, struct device *master,
254 void *data)
255{
256 struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
257
258 imxpd->encoder.funcs->destroy(&imxpd->encoder);
259 imxpd->connector.funcs->destroy(&imxpd->connector);
260}
261
262static const struct component_ops imx_pd_ops = {
263 .bind = imx_pd_bind,
264 .unbind = imx_pd_unbind,
265};
266
267static int imx_pd_probe(struct platform_device *pdev)
268{
269 return component_add(&pdev->dev, &imx_pd_ops);
270}
271
272static int imx_pd_remove(struct platform_device *pdev)
273{
274 component_del(&pdev->dev, &imx_pd_ops);
275 return 0;
276}
277
278static const struct of_device_id imx_pd_dt_ids[] = {
279 { .compatible = "fsl,imx-parallel-display", },
280 { }
281};
282MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
283
284static struct platform_driver imx_pd_driver = {
285 .probe = imx_pd_probe,
286 .remove = imx_pd_remove,
287 .driver = {
288 .of_match_table = imx_pd_dt_ids,
289 .name = "imx-parallel-display",
290 },
291};
292
293module_platform_driver(imx_pd_driver);
294
295MODULE_DESCRIPTION("i.MX parallel display driver");
296MODULE_AUTHOR("Sascha Hauer, Pengutronix");
297MODULE_LICENSE("GPL");
298MODULE_ALIAS("platform:imx-parallel-display");
299
