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1/*
2 * i.MX drm driver - parallel display implementation
3 *
4 * Copyright (C) 2012 Sascha Hauer, Pengutronix
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16#include <linux/component.h>
17#include <linux/module.h>
18#include <drm/drmP.h>
19#include <drm/drm_atomic_helper.h>
20#include <drm/drm_fb_helper.h>
21#include <drm/drm_crtc_helper.h>
22#include <drm/drm_panel.h>
23#include <linux/videodev2.h>
24#include <video/of_display_timing.h>
25#include <linux/of_graph.h>
26
27#include "imx-drm.h"
28
29struct imx_parallel_display {
30 struct drm_connector connector;
31 struct drm_encoder encoder;
32 struct device *dev;
33 void *edid;
34 int edid_len;
35 u32 bus_format;
36 u32 bus_flags;
37 struct drm_display_mode mode;
38 struct drm_panel *panel;
39 struct drm_bridge *bridge;
40};
41
42static inline struct imx_parallel_display *con_to_imxpd(struct drm_connector *c)
43{
44 return container_of(c, struct imx_parallel_display, connector);
45}
46
47static inline struct imx_parallel_display *enc_to_imxpd(struct drm_encoder *e)
48{
49 return container_of(e, struct imx_parallel_display, encoder);
50}
51
52static int imx_pd_connector_get_modes(struct drm_connector *connector)
53{
54 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
55 struct device_node *np = imxpd->dev->of_node;
56 int num_modes = 0;
57
58 if (imxpd->panel && imxpd->panel->funcs &&
59 imxpd->panel->funcs->get_modes) {
60 num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
61 if (num_modes > 0)
62 return num_modes;
63 }
64
65 if (imxpd->edid) {
66 drm_mode_connector_update_edid_property(connector, imxpd->edid);
67 num_modes = drm_add_edid_modes(connector, imxpd->edid);
68 }
69
70 if (np) {
71 struct drm_display_mode *mode = drm_mode_create(connector->dev);
72 int ret;
73
74 if (!mode)
75 return -EINVAL;
76
77 ret = of_get_drm_display_mode(np, &imxpd->mode,
78 &imxpd->bus_flags,
79 OF_USE_NATIVE_MODE);
80 if (ret)
81 return ret;
82
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_enable(struct drm_encoder *encoder)
101{
102 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
103
104 drm_panel_prepare(imxpd->panel);
105 drm_panel_enable(imxpd->panel);
106}
107
108static void imx_pd_encoder_disable(struct drm_encoder *encoder)
109{
110 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
111
112 drm_panel_disable(imxpd->panel);
113 drm_panel_unprepare(imxpd->panel);
114}
115
116static int imx_pd_encoder_atomic_check(struct drm_encoder *encoder,
117 struct drm_crtc_state *crtc_state,
118 struct drm_connector_state *conn_state)
119{
120 struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
121 struct drm_display_info *di = &conn_state->connector->display_info;
122 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
123
124 if (!imxpd->bus_format && di->num_bus_formats) {
125 imx_crtc_state->bus_flags = di->bus_flags;
126 imx_crtc_state->bus_format = di->bus_formats[0];
127 } else {
128 imx_crtc_state->bus_flags = imxpd->bus_flags;
129 imx_crtc_state->bus_format = imxpd->bus_format;
130 }
131 imx_crtc_state->di_hsync_pin = 2;
132 imx_crtc_state->di_vsync_pin = 3;
133
134 return 0;
135}
136
137static const struct drm_connector_funcs imx_pd_connector_funcs = {
138 .dpms = drm_atomic_helper_connector_dpms,
139 .fill_modes = drm_helper_probe_single_connector_modes,
140 .destroy = imx_drm_connector_destroy,
141 .reset = drm_atomic_helper_connector_reset,
142 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
143 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
144};
145
146static const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
147 .get_modes = imx_pd_connector_get_modes,
148 .best_encoder = imx_pd_connector_best_encoder,
149};
150
151static const struct drm_encoder_funcs imx_pd_encoder_funcs = {
152 .destroy = imx_drm_encoder_destroy,
153};
154
155static const struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
156 .enable = imx_pd_encoder_enable,
157 .disable = imx_pd_encoder_disable,
158 .atomic_check = imx_pd_encoder_atomic_check,
159};
160
161static int imx_pd_register(struct drm_device *drm,
162 struct imx_parallel_display *imxpd)
163{
164 struct drm_encoder *encoder = &imxpd->encoder;
165 int ret;
166
167 ret = imx_drm_encoder_parse_of(drm, encoder, imxpd->dev->of_node);
168 if (ret)
169 return ret;
170
171 /* set the connector's dpms to OFF so that
172 * drm_helper_connector_dpms() won't return
173 * immediately since the current state is ON
174 * at this point.
175 */
176 imxpd->connector.dpms = DRM_MODE_DPMS_OFF;
177
178 drm_encoder_helper_add(encoder, &imx_pd_encoder_helper_funcs);
179 drm_encoder_init(drm, encoder, &imx_pd_encoder_funcs,
180 DRM_MODE_ENCODER_NONE, NULL);
181
182 if (!imxpd->bridge) {
183 drm_connector_helper_add(&imxpd->connector,
184 &imx_pd_connector_helper_funcs);
185 drm_connector_init(drm, &imxpd->connector,
186 &imx_pd_connector_funcs,
187 DRM_MODE_CONNECTOR_VGA);
188 }
189
190 if (imxpd->panel)
191 drm_panel_attach(imxpd->panel, &imxpd->connector);
192
193 if (imxpd->bridge) {
194 imxpd->bridge->encoder = encoder;
195 encoder->bridge = imxpd->bridge;
196 ret = drm_bridge_attach(drm, imxpd->bridge);
197 if (ret < 0) {
198 dev_err(imxpd->dev, "failed to attach bridge: %d\n",
199 ret);
200 return ret;
201 }
202 } else {
203 drm_mode_connector_attach_encoder(&imxpd->connector, encoder);
204 }
205
206 return 0;
207}
208
209static int imx_pd_bind(struct device *dev, struct device *master, void *data)
210{
211 struct drm_device *drm = data;
212 struct device_node *np = dev->of_node;
213 struct device_node *ep;
214 const u8 *edidp;
215 struct imx_parallel_display *imxpd;
216 int ret;
217 u32 bus_format = 0;
218 const char *fmt;
219
220 imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
221 if (!imxpd)
222 return -ENOMEM;
223
224 edidp = of_get_property(np, "edid", &imxpd->edid_len);
225 if (edidp)
226 imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
227
228 ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
229 if (!ret) {
230 if (!strcmp(fmt, "rgb24"))
231 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
232 else if (!strcmp(fmt, "rgb565"))
233 bus_format = MEDIA_BUS_FMT_RGB565_1X16;
234 else if (!strcmp(fmt, "bgr666"))
235 bus_format = MEDIA_BUS_FMT_RGB666_1X18;
236 else if (!strcmp(fmt, "lvds666"))
237 bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
238 }
239 imxpd->bus_format = bus_format;
240
241 /* port@1 is the output port */
242 ep = of_graph_get_endpoint_by_regs(np, 1, -1);
243 if (ep) {
244 struct device_node *remote;
245
246 remote = of_graph_get_remote_port_parent(ep);
247 if (!remote) {
248 dev_warn(dev, "endpoint %s not connected\n",
249 ep->full_name);
250 of_node_put(ep);
251 return -ENODEV;
252 }
253 of_node_put(ep);
254
255 imxpd->panel = of_drm_find_panel(remote);
256 if (imxpd->panel) {
257 dev_dbg(dev, "found panel %s\n", remote->full_name);
258 } else {
259 imxpd->bridge = of_drm_find_bridge(remote);
260 if (imxpd->bridge)
261 dev_dbg(dev, "found bridge %s\n",
262 remote->full_name);
263 }
264 if (!imxpd->panel && !imxpd->bridge) {
265 dev_dbg(dev, "waiting for panel or bridge %s\n",
266 remote->full_name);
267 of_node_put(remote);
268 return -EPROBE_DEFER;
269 }
270 of_node_put(remote);
271 }
272
273 imxpd->dev = dev;
274
275 ret = imx_pd_register(drm, imxpd);
276 if (ret)
277 return ret;
278
279 dev_set_drvdata(dev, imxpd);
280
281 return 0;
282}
283
284static void imx_pd_unbind(struct device *dev, struct device *master,
285 void *data)
286{
287 struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
288
289 if (imxpd->bridge)
290 drm_bridge_detach(imxpd->bridge);
291 if (imxpd->panel)
292 drm_panel_detach(imxpd->panel);
293
294 kfree(imxpd->edid);
295}
296
297static const struct component_ops imx_pd_ops = {
298 .bind = imx_pd_bind,
299 .unbind = imx_pd_unbind,
300};
301
302static int imx_pd_probe(struct platform_device *pdev)
303{
304 return component_add(&pdev->dev, &imx_pd_ops);
305}
306
307static int imx_pd_remove(struct platform_device *pdev)
308{
309 component_del(&pdev->dev, &imx_pd_ops);
310
311 return 0;
312}
313
314static const struct of_device_id imx_pd_dt_ids[] = {
315 { .compatible = "fsl,imx-parallel-display", },
316 { /* sentinel */ }
317};
318MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
319
320static struct platform_driver imx_pd_driver = {
321 .probe = imx_pd_probe,
322 .remove = imx_pd_remove,
323 .driver = {
324 .of_match_table = imx_pd_dt_ids,
325 .name = "imx-parallel-display",
326 },
327};
328
329module_platform_driver(imx_pd_driver);
330
331MODULE_DESCRIPTION("i.MX parallel display driver");
332MODULE_AUTHOR("Sascha Hauer, Pengutronix");
333MODULE_LICENSE("GPL");
334MODULE_ALIAS("platform:imx-parallel-display");
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * i.MX drm driver - parallel display implementation
4 *
5 * Copyright (C) 2012 Sascha Hauer, Pengutronix
6 */
7
8#include <linux/component.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/videodev2.h>
12
13#include <video/of_display_timing.h>
14
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_bridge.h>
17#include <drm/drm_fb_helper.h>
18#include <drm/drm_managed.h>
19#include <drm/drm_of.h>
20#include <drm/drm_panel.h>
21#include <drm/drm_probe_helper.h>
22#include <drm/drm_simple_kms_helper.h>
23
24#include "imx-drm.h"
25
26struct imx_parallel_display_encoder {
27 struct drm_connector connector;
28 struct drm_encoder encoder;
29 struct drm_bridge bridge;
30 struct imx_parallel_display *pd;
31};
32
33struct imx_parallel_display {
34 struct device *dev;
35 void *edid;
36 u32 bus_format;
37 u32 bus_flags;
38 struct drm_display_mode mode;
39 struct drm_panel *panel;
40 struct drm_bridge *next_bridge;
41};
42
43static inline struct imx_parallel_display *con_to_imxpd(struct drm_connector *c)
44{
45 return container_of(c, struct imx_parallel_display_encoder, connector)->pd;
46}
47
48static inline struct imx_parallel_display *bridge_to_imxpd(struct drm_bridge *b)
49{
50 return container_of(b, struct imx_parallel_display_encoder, bridge)->pd;
51}
52
53static int imx_pd_connector_get_modes(struct drm_connector *connector)
54{
55 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
56 struct device_node *np = imxpd->dev->of_node;
57 int num_modes;
58
59 num_modes = drm_panel_get_modes(imxpd->panel, connector);
60 if (num_modes > 0)
61 return num_modes;
62
63 if (imxpd->edid) {
64 drm_connector_update_edid_property(connector, imxpd->edid);
65 num_modes = drm_add_edid_modes(connector, imxpd->edid);
66 }
67
68 if (np) {
69 struct drm_display_mode *mode = drm_mode_create(connector->dev);
70 int ret;
71
72 if (!mode)
73 return -EINVAL;
74
75 ret = of_get_drm_display_mode(np, &imxpd->mode,
76 &imxpd->bus_flags,
77 OF_USE_NATIVE_MODE);
78 if (ret)
79 return ret;
80
81 drm_mode_copy(mode, &imxpd->mode);
82 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
83 drm_mode_probed_add(connector, mode);
84 num_modes++;
85 }
86
87 return num_modes;
88}
89
90static void imx_pd_bridge_enable(struct drm_bridge *bridge)
91{
92 struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
93
94 drm_panel_prepare(imxpd->panel);
95 drm_panel_enable(imxpd->panel);
96}
97
98static void imx_pd_bridge_disable(struct drm_bridge *bridge)
99{
100 struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
101
102 drm_panel_disable(imxpd->panel);
103 drm_panel_unprepare(imxpd->panel);
104}
105
106static const u32 imx_pd_bus_fmts[] = {
107 MEDIA_BUS_FMT_RGB888_1X24,
108 MEDIA_BUS_FMT_BGR888_1X24,
109 MEDIA_BUS_FMT_GBR888_1X24,
110 MEDIA_BUS_FMT_RGB666_1X18,
111 MEDIA_BUS_FMT_RGB666_1X24_CPADHI,
112 MEDIA_BUS_FMT_RGB565_1X16,
113};
114
115static u32 *
116imx_pd_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
117 struct drm_bridge_state *bridge_state,
118 struct drm_crtc_state *crtc_state,
119 struct drm_connector_state *conn_state,
120 unsigned int *num_output_fmts)
121{
122 struct drm_display_info *di = &conn_state->connector->display_info;
123 struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
124 u32 *output_fmts;
125
126 if (!imxpd->bus_format && !di->num_bus_formats) {
127 *num_output_fmts = ARRAY_SIZE(imx_pd_bus_fmts);
128 return kmemdup(imx_pd_bus_fmts, sizeof(imx_pd_bus_fmts),
129 GFP_KERNEL);
130 }
131
132 *num_output_fmts = 1;
133 output_fmts = kmalloc(sizeof(*output_fmts), GFP_KERNEL);
134 if (!output_fmts)
135 return NULL;
136
137 if (!imxpd->bus_format && di->num_bus_formats)
138 output_fmts[0] = di->bus_formats[0];
139 else
140 output_fmts[0] = imxpd->bus_format;
141
142 return output_fmts;
143}
144
145static bool imx_pd_format_supported(u32 output_fmt)
146{
147 unsigned int i;
148
149 for (i = 0; i < ARRAY_SIZE(imx_pd_bus_fmts); i++) {
150 if (imx_pd_bus_fmts[i] == output_fmt)
151 return true;
152 }
153
154 return false;
155}
156
157static u32 *
158imx_pd_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
159 struct drm_bridge_state *bridge_state,
160 struct drm_crtc_state *crtc_state,
161 struct drm_connector_state *conn_state,
162 u32 output_fmt,
163 unsigned int *num_input_fmts)
164{
165 struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
166 u32 *input_fmts;
167
168 /*
169 * If the next bridge does not support bus format negotiation, let's
170 * use the static bus format definition (imxpd->bus_format) if it's
171 * specified, RGB888 when it's not.
172 */
173 if (output_fmt == MEDIA_BUS_FMT_FIXED)
174 output_fmt = imxpd->bus_format ? : MEDIA_BUS_FMT_RGB888_1X24;
175
176 /* Now make sure the requested output format is supported. */
177 if ((imxpd->bus_format && imxpd->bus_format != output_fmt) ||
178 !imx_pd_format_supported(output_fmt)) {
179 *num_input_fmts = 0;
180 return NULL;
181 }
182
183 *num_input_fmts = 1;
184 input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL);
185 if (!input_fmts)
186 return NULL;
187
188 input_fmts[0] = output_fmt;
189 return input_fmts;
190}
191
192static int imx_pd_bridge_atomic_check(struct drm_bridge *bridge,
193 struct drm_bridge_state *bridge_state,
194 struct drm_crtc_state *crtc_state,
195 struct drm_connector_state *conn_state)
196{
197 struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
198 struct drm_display_info *di = &conn_state->connector->display_info;
199 struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
200 struct drm_bridge_state *next_bridge_state = NULL;
201 struct drm_bridge *next_bridge;
202 u32 bus_flags, bus_fmt;
203
204 next_bridge = drm_bridge_get_next_bridge(bridge);
205 if (next_bridge)
206 next_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
207 next_bridge);
208
209 if (next_bridge_state)
210 bus_flags = next_bridge_state->input_bus_cfg.flags;
211 else if (di->num_bus_formats)
212 bus_flags = di->bus_flags;
213 else
214 bus_flags = imxpd->bus_flags;
215
216 bus_fmt = bridge_state->input_bus_cfg.format;
217 if (!imx_pd_format_supported(bus_fmt))
218 return -EINVAL;
219
220 if (bus_flags &
221 ~(DRM_BUS_FLAG_DE_LOW | DRM_BUS_FLAG_DE_HIGH |
222 DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE |
223 DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)) {
224 dev_warn(imxpd->dev, "invalid bus_flags (%x)\n", bus_flags);
225 return -EINVAL;
226 }
227
228 bridge_state->output_bus_cfg.flags = bus_flags;
229 bridge_state->input_bus_cfg.flags = bus_flags;
230 imx_crtc_state->bus_flags = bus_flags;
231 imx_crtc_state->bus_format = bridge_state->input_bus_cfg.format;
232 imx_crtc_state->di_hsync_pin = 2;
233 imx_crtc_state->di_vsync_pin = 3;
234
235 return 0;
236}
237
238static const struct drm_connector_funcs imx_pd_connector_funcs = {
239 .fill_modes = drm_helper_probe_single_connector_modes,
240 .destroy = imx_drm_connector_destroy,
241 .reset = drm_atomic_helper_connector_reset,
242 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
243 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
244};
245
246static const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
247 .get_modes = imx_pd_connector_get_modes,
248};
249
250static const struct drm_bridge_funcs imx_pd_bridge_funcs = {
251 .enable = imx_pd_bridge_enable,
252 .disable = imx_pd_bridge_disable,
253 .atomic_reset = drm_atomic_helper_bridge_reset,
254 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
255 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
256 .atomic_check = imx_pd_bridge_atomic_check,
257 .atomic_get_input_bus_fmts = imx_pd_bridge_atomic_get_input_bus_fmts,
258 .atomic_get_output_bus_fmts = imx_pd_bridge_atomic_get_output_bus_fmts,
259};
260
261static int imx_pd_bind(struct device *dev, struct device *master, void *data)
262{
263 struct drm_device *drm = data;
264 struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
265 struct imx_parallel_display_encoder *imxpd_encoder;
266 struct drm_connector *connector;
267 struct drm_encoder *encoder;
268 struct drm_bridge *bridge;
269 int ret;
270
271 imxpd_encoder = drmm_simple_encoder_alloc(drm, struct imx_parallel_display_encoder,
272 encoder, DRM_MODE_ENCODER_NONE);
273 if (IS_ERR(imxpd_encoder))
274 return PTR_ERR(imxpd_encoder);
275
276 imxpd_encoder->pd = imxpd;
277 connector = &imxpd_encoder->connector;
278 encoder = &imxpd_encoder->encoder;
279 bridge = &imxpd_encoder->bridge;
280
281 ret = imx_drm_encoder_parse_of(drm, encoder, imxpd->dev->of_node);
282 if (ret)
283 return ret;
284
285 /* set the connector's dpms to OFF so that
286 * drm_helper_connector_dpms() won't return
287 * immediately since the current state is ON
288 * at this point.
289 */
290 connector->dpms = DRM_MODE_DPMS_OFF;
291
292 bridge->funcs = &imx_pd_bridge_funcs;
293 drm_bridge_attach(encoder, bridge, NULL, 0);
294
295 if (imxpd->next_bridge) {
296 ret = drm_bridge_attach(encoder, imxpd->next_bridge, bridge, 0);
297 if (ret < 0) {
298 dev_err(imxpd->dev, "failed to attach bridge: %d\n",
299 ret);
300 return ret;
301 }
302 } else {
303 drm_connector_helper_add(connector,
304 &imx_pd_connector_helper_funcs);
305 drm_connector_init(drm, connector, &imx_pd_connector_funcs,
306 DRM_MODE_CONNECTOR_DPI);
307
308 drm_connector_attach_encoder(connector, encoder);
309 }
310
311 return 0;
312}
313
314static const struct component_ops imx_pd_ops = {
315 .bind = imx_pd_bind,
316};
317
318static int imx_pd_probe(struct platform_device *pdev)
319{
320 struct device *dev = &pdev->dev;
321 struct device_node *np = dev->of_node;
322 const u8 *edidp;
323 struct imx_parallel_display *imxpd;
324 int edid_len;
325 int ret;
326 u32 bus_format = 0;
327 const char *fmt;
328
329 imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
330 if (!imxpd)
331 return -ENOMEM;
332
333 /* port@1 is the output port */
334 ret = drm_of_find_panel_or_bridge(np, 1, 0, &imxpd->panel,
335 &imxpd->next_bridge);
336 if (ret && ret != -ENODEV)
337 return ret;
338
339 edidp = of_get_property(np, "edid", &edid_len);
340 if (edidp)
341 imxpd->edid = devm_kmemdup(dev, edidp, edid_len, GFP_KERNEL);
342
343 ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
344 if (!ret) {
345 if (!strcmp(fmt, "rgb24"))
346 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
347 else if (!strcmp(fmt, "rgb565"))
348 bus_format = MEDIA_BUS_FMT_RGB565_1X16;
349 else if (!strcmp(fmt, "bgr666"))
350 bus_format = MEDIA_BUS_FMT_RGB666_1X18;
351 else if (!strcmp(fmt, "lvds666"))
352 bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
353 }
354 imxpd->bus_format = bus_format;
355
356 imxpd->dev = dev;
357
358 platform_set_drvdata(pdev, imxpd);
359
360 return component_add(dev, &imx_pd_ops);
361}
362
363static int imx_pd_remove(struct platform_device *pdev)
364{
365 component_del(&pdev->dev, &imx_pd_ops);
366
367 return 0;
368}
369
370static const struct of_device_id imx_pd_dt_ids[] = {
371 { .compatible = "fsl,imx-parallel-display", },
372 { /* sentinel */ }
373};
374MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
375
376static struct platform_driver imx_pd_driver = {
377 .probe = imx_pd_probe,
378 .remove = imx_pd_remove,
379 .driver = {
380 .of_match_table = imx_pd_dt_ids,
381 .name = "imx-parallel-display",
382 },
383};
384
385module_platform_driver(imx_pd_driver);
386
387MODULE_DESCRIPTION("i.MX parallel display driver");
388MODULE_AUTHOR("Sascha Hauer, Pengutronix");
389MODULE_LICENSE("GPL");
390MODULE_ALIAS("platform:imx-parallel-display");