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21#include <linux/module.h>
22#include <drm/drmP.h>
23#include <drm/drm_fb_helper.h>
24#include <drm/drm_crtc_helper.h>
25#include <linux/videodev2.h>
26#include <linux/pinctrl/consumer.h>
27
28#include "imx-drm.h"
29
30#define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
31#define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)
32
33struct imx_parallel_display {
34 struct drm_connector connector;
35 struct imx_drm_connector *imx_drm_connector;
36 struct drm_encoder encoder;
37 struct imx_drm_encoder *imx_drm_encoder;
38 struct device *dev;
39 void *edid;
40 int edid_len;
41 u32 interface_pix_fmt;
42 int mode_valid;
43 struct drm_display_mode mode;
44};
45
46static enum drm_connector_status imx_pd_connector_detect(
47 struct drm_connector *connector, bool force)
48{
49 return connector_status_connected;
50}
51
52static void imx_pd_connector_destroy(struct drm_connector *connector)
53{
54
55}
56
57static int imx_pd_connector_get_modes(struct drm_connector *connector)
58{
59 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
60 struct device_node *np = imxpd->dev->of_node;
61 int num_modes = 0;
62
63 if (imxpd->edid) {
64 drm_mode_connector_update_edid_property(connector, imxpd->edid);
65 num_modes = drm_add_edid_modes(connector, imxpd->edid);
66 }
67
68 if (imxpd->mode_valid) {
69 struct drm_display_mode *mode = drm_mode_create(connector->dev);
70 drm_mode_copy(mode, &imxpd->mode);
71 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
72 drm_mode_probed_add(connector, mode);
73 num_modes++;
74 }
75
76 if (np) {
77 struct drm_display_mode *mode = drm_mode_create(connector->dev);
78 of_get_drm_display_mode(np, &imxpd->mode, 0);
79 drm_mode_copy(mode, &imxpd->mode);
80 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
81 drm_mode_probed_add(connector, mode);
82 num_modes++;
83 }
84
85 return num_modes;
86}
87
88static int imx_pd_connector_mode_valid(struct drm_connector *connector,
89 struct drm_display_mode *mode)
90{
91 return 0;
92}
93
94static struct drm_encoder *imx_pd_connector_best_encoder(
95 struct drm_connector *connector)
96{
97 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
98
99 return &imxpd->encoder;
100}
101
102static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
103{
104}
105
106static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
107 const struct drm_display_mode *mode,
108 struct drm_display_mode *adjusted_mode)
109{
110 return true;
111}
112
113static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
114{
115 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
116
117 imx_drm_crtc_panel_format(encoder->crtc, DRM_MODE_ENCODER_NONE,
118 imxpd->interface_pix_fmt);
119}
120
121static void imx_pd_encoder_commit(struct drm_encoder *encoder)
122{
123}
124
125static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
126 struct drm_display_mode *mode,
127 struct drm_display_mode *adjusted_mode)
128{
129}
130
131static void imx_pd_encoder_disable(struct drm_encoder *encoder)
132{
133}
134
135static void imx_pd_encoder_destroy(struct drm_encoder *encoder)
136{
137
138}
139
140static struct drm_connector_funcs imx_pd_connector_funcs = {
141 .dpms = drm_helper_connector_dpms,
142 .fill_modes = drm_helper_probe_single_connector_modes,
143 .detect = imx_pd_connector_detect,
144 .destroy = imx_pd_connector_destroy,
145};
146
147static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
148 .get_modes = imx_pd_connector_get_modes,
149 .best_encoder = imx_pd_connector_best_encoder,
150 .mode_valid = imx_pd_connector_mode_valid,
151};
152
153static struct drm_encoder_funcs imx_pd_encoder_funcs = {
154 .destroy = imx_pd_encoder_destroy,
155};
156
157static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
158 .dpms = imx_pd_encoder_dpms,
159 .mode_fixup = imx_pd_encoder_mode_fixup,
160 .prepare = imx_pd_encoder_prepare,
161 .commit = imx_pd_encoder_commit,
162 .mode_set = imx_pd_encoder_mode_set,
163 .disable = imx_pd_encoder_disable,
164};
165
166static int imx_pd_register(struct imx_parallel_display *imxpd)
167{
168 int ret;
169
170 drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);
171
172 imxpd->connector.funcs = &imx_pd_connector_funcs;
173 imxpd->encoder.funcs = &imx_pd_encoder_funcs;
174
175 imxpd->encoder.encoder_type = DRM_MODE_ENCODER_NONE;
176 imxpd->connector.connector_type = DRM_MODE_CONNECTOR_VGA;
177
178 drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
179 ret = imx_drm_add_encoder(&imxpd->encoder, &imxpd->imx_drm_encoder,
180 THIS_MODULE);
181 if (ret) {
182 dev_err(imxpd->dev, "adding encoder failed with %d\n", ret);
183 return ret;
184 }
185
186 drm_connector_helper_add(&imxpd->connector,
187 &imx_pd_connector_helper_funcs);
188
189 ret = imx_drm_add_connector(&imxpd->connector,
190 &imxpd->imx_drm_connector, THIS_MODULE);
191 if (ret) {
192 imx_drm_remove_encoder(imxpd->imx_drm_encoder);
193 dev_err(imxpd->dev, "adding connector failed with %d\n", ret);
194 return ret;
195 }
196
197 imxpd->connector.encoder = &imxpd->encoder;
198
199 return 0;
200}
201
202static int imx_pd_probe(struct platform_device *pdev)
203{
204 struct device_node *np = pdev->dev.of_node;
205 const u8 *edidp;
206 struct imx_parallel_display *imxpd;
207 int ret;
208 const char *fmt;
209 struct pinctrl *pinctrl;
210
211 imxpd = devm_kzalloc(&pdev->dev, sizeof(*imxpd), GFP_KERNEL);
212 if (!imxpd)
213 return -ENOMEM;
214
215 pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
216 if (IS_ERR(pinctrl)) {
217 ret = PTR_ERR(pinctrl);
218 dev_warn(&pdev->dev, "pinctrl_get_select_default failed with %d",
219 ret);
220 return ret;
221 }
222
223 edidp = of_get_property(np, "edid", &imxpd->edid_len);
224 if (edidp)
225 imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
226
227 ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
228 if (!ret) {
229 if (!strcmp(fmt, "rgb24"))
230 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24;
231 else if (!strcmp(fmt, "rgb565"))
232 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565;
233 else if (!strcmp(fmt, "bgr666"))
234 imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666;
235 }
236
237 imxpd->dev = &pdev->dev;
238
239 ret = imx_pd_register(imxpd);
240 if (ret)
241 return ret;
242
243 ret = imx_drm_encoder_add_possible_crtcs(imxpd->imx_drm_encoder, np);
244
245 platform_set_drvdata(pdev, imxpd);
246
247 return 0;
248}
249
250static int imx_pd_remove(struct platform_device *pdev)
251{
252 struct imx_parallel_display *imxpd = platform_get_drvdata(pdev);
253 struct drm_connector *connector = &imxpd->connector;
254 struct drm_encoder *encoder = &imxpd->encoder;
255
256 drm_mode_connector_detach_encoder(connector, encoder);
257
258 imx_drm_remove_connector(imxpd->imx_drm_connector);
259 imx_drm_remove_encoder(imxpd->imx_drm_encoder);
260
261 return 0;
262}
263
264static const struct of_device_id imx_pd_dt_ids[] = {
265 { .compatible = "fsl,imx-parallel-display", },
266 { }
267};
268
269static struct platform_driver imx_pd_driver = {
270 .probe = imx_pd_probe,
271 .remove = imx_pd_remove,
272 .driver = {
273 .of_match_table = imx_pd_dt_ids,
274 .name = "imx-parallel-display",
275 .owner = THIS_MODULE,
276 },
277};
278
279module_platform_driver(imx_pd_driver);
280
281MODULE_DESCRIPTION("i.MX parallel display driver");
282MODULE_AUTHOR("Sascha Hauer, Pengutronix");
283MODULE_LICENSE("GPL");
284
