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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Texas Instruments
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#include <linux/gpio/consumer.h>
8#include <linux/pinctrl/consumer.h>
9#include <linux/platform_device.h>
10
11#include <video/display_timing.h>
12#include <video/of_display_timing.h>
13#include <video/videomode.h>
14
15#include <drm/drm_atomic_state_helper.h>
16#include <drm/drm_connector.h>
17#include <drm/drm_modeset_helper_vtables.h>
18#include <drm/drm_probe_helper.h>
19#include <drm/drm_simple_kms_helper.h>
20
21#include "tilcdc_drv.h"
22#include "tilcdc_panel.h"
23
24struct panel_module {
25 struct tilcdc_module base;
26 struct tilcdc_panel_info *info;
27 struct display_timings *timings;
28 struct backlight_device *backlight;
29 struct gpio_desc *enable_gpio;
30};
31#define to_panel_module(x) container_of(x, struct panel_module, base)
32
33
34/*
35 * Encoder:
36 */
37
38struct panel_encoder {
39 struct drm_encoder base;
40 struct panel_module *mod;
41};
42#define to_panel_encoder(x) container_of(x, struct panel_encoder, base)
43
44static void panel_encoder_dpms(struct drm_encoder *encoder, int mode)
45{
46 struct panel_encoder *panel_encoder = to_panel_encoder(encoder);
47 struct backlight_device *backlight = panel_encoder->mod->backlight;
48 struct gpio_desc *gpio = panel_encoder->mod->enable_gpio;
49
50 if (backlight) {
51 backlight->props.power = mode == DRM_MODE_DPMS_ON ?
52 FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
53 backlight_update_status(backlight);
54 }
55
56 if (gpio)
57 gpiod_set_value_cansleep(gpio,
58 mode == DRM_MODE_DPMS_ON ? 1 : 0);
59}
60
61static void panel_encoder_prepare(struct drm_encoder *encoder)
62{
63 panel_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
64}
65
66static void panel_encoder_commit(struct drm_encoder *encoder)
67{
68 panel_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
69}
70
71static void panel_encoder_mode_set(struct drm_encoder *encoder,
72 struct drm_display_mode *mode,
73 struct drm_display_mode *adjusted_mode)
74{
75 /* nothing needed */
76}
77
78static const struct drm_encoder_helper_funcs panel_encoder_helper_funcs = {
79 .dpms = panel_encoder_dpms,
80 .prepare = panel_encoder_prepare,
81 .commit = panel_encoder_commit,
82 .mode_set = panel_encoder_mode_set,
83};
84
85static struct drm_encoder *panel_encoder_create(struct drm_device *dev,
86 struct panel_module *mod)
87{
88 struct panel_encoder *panel_encoder;
89 struct drm_encoder *encoder;
90 int ret;
91
92 panel_encoder = devm_kzalloc(dev->dev, sizeof(*panel_encoder),
93 GFP_KERNEL);
94 if (!panel_encoder)
95 return NULL;
96
97 panel_encoder->mod = mod;
98
99 encoder = &panel_encoder->base;
100 encoder->possible_crtcs = 1;
101
102 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
103 if (ret < 0)
104 goto fail;
105
106 drm_encoder_helper_add(encoder, &panel_encoder_helper_funcs);
107
108 return encoder;
109
110fail:
111 drm_encoder_cleanup(encoder);
112 return NULL;
113}
114
115/*
116 * Connector:
117 */
118
119struct panel_connector {
120 struct drm_connector base;
121
122 struct drm_encoder *encoder; /* our connected encoder */
123 struct panel_module *mod;
124};
125#define to_panel_connector(x) container_of(x, struct panel_connector, base)
126
127
128static void panel_connector_destroy(struct drm_connector *connector)
129{
130 drm_connector_unregister(connector);
131 drm_connector_cleanup(connector);
132}
133
134static int panel_connector_get_modes(struct drm_connector *connector)
135{
136 struct drm_device *dev = connector->dev;
137 struct panel_connector *panel_connector = to_panel_connector(connector);
138 struct display_timings *timings = panel_connector->mod->timings;
139 int i;
140
141 for (i = 0; i < timings->num_timings; i++) {
142 struct drm_display_mode *mode;
143 struct videomode vm;
144
145 if (videomode_from_timings(timings, &vm, i))
146 break;
147
148 mode = drm_mode_create(dev);
149 if (!mode)
150 break;
151
152 drm_display_mode_from_videomode(&vm, mode);
153
154 mode->type = DRM_MODE_TYPE_DRIVER;
155
156 if (timings->native_mode == i)
157 mode->type |= DRM_MODE_TYPE_PREFERRED;
158
159 drm_mode_set_name(mode);
160 drm_mode_probed_add(connector, mode);
161 }
162
163 return i;
164}
165
166static struct drm_encoder *panel_connector_best_encoder(
167 struct drm_connector *connector)
168{
169 struct panel_connector *panel_connector = to_panel_connector(connector);
170 return panel_connector->encoder;
171}
172
173static const struct drm_connector_funcs panel_connector_funcs = {
174 .destroy = panel_connector_destroy,
175 .fill_modes = drm_helper_probe_single_connector_modes,
176 .reset = drm_atomic_helper_connector_reset,
177 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
178 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
179};
180
181static const struct drm_connector_helper_funcs panel_connector_helper_funcs = {
182 .get_modes = panel_connector_get_modes,
183 .best_encoder = panel_connector_best_encoder,
184};
185
186static struct drm_connector *panel_connector_create(struct drm_device *dev,
187 struct panel_module *mod, struct drm_encoder *encoder)
188{
189 struct panel_connector *panel_connector;
190 struct drm_connector *connector;
191 int ret;
192
193 panel_connector = devm_kzalloc(dev->dev, sizeof(*panel_connector),
194 GFP_KERNEL);
195 if (!panel_connector)
196 return NULL;
197
198 panel_connector->encoder = encoder;
199 panel_connector->mod = mod;
200
201 connector = &panel_connector->base;
202
203 drm_connector_init(dev, connector, &panel_connector_funcs,
204 DRM_MODE_CONNECTOR_LVDS);
205 drm_connector_helper_add(connector, &panel_connector_helper_funcs);
206
207 connector->interlace_allowed = 0;
208 connector->doublescan_allowed = 0;
209
210 ret = drm_connector_attach_encoder(connector, encoder);
211 if (ret)
212 goto fail;
213
214 return connector;
215
216fail:
217 panel_connector_destroy(connector);
218 return NULL;
219}
220
221/*
222 * Module:
223 */
224
225static int panel_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
226{
227 struct panel_module *panel_mod = to_panel_module(mod);
228 struct tilcdc_drm_private *priv = dev->dev_private;
229 struct drm_encoder *encoder;
230 struct drm_connector *connector;
231
232 encoder = panel_encoder_create(dev, panel_mod);
233 if (!encoder)
234 return -ENOMEM;
235
236 connector = panel_connector_create(dev, panel_mod, encoder);
237 if (!connector)
238 return -ENOMEM;
239
240 priv->encoders[priv->num_encoders++] = encoder;
241 priv->connectors[priv->num_connectors++] = connector;
242
243 tilcdc_crtc_set_panel_info(priv->crtc,
244 to_panel_encoder(encoder)->mod->info);
245
246 return 0;
247}
248
249static const struct tilcdc_module_ops panel_module_ops = {
250 .modeset_init = panel_modeset_init,
251};
252
253/*
254 * Device:
255 */
256
257/* maybe move this somewhere common if it is needed by other outputs? */
258static struct tilcdc_panel_info *of_get_panel_info(struct device_node *np)
259{
260 struct device_node *info_np;
261 struct tilcdc_panel_info *info;
262 int ret = 0;
263
264 if (!np) {
265 pr_err("%s: no devicenode given\n", __func__);
266 return NULL;
267 }
268
269 info_np = of_get_child_by_name(np, "panel-info");
270 if (!info_np) {
271 pr_err("%s: could not find panel-info node\n", __func__);
272 return NULL;
273 }
274
275 info = kzalloc(sizeof(*info), GFP_KERNEL);
276 if (!info)
277 goto put_node;
278
279 ret |= of_property_read_u32(info_np, "ac-bias", &info->ac_bias);
280 ret |= of_property_read_u32(info_np, "ac-bias-intrpt", &info->ac_bias_intrpt);
281 ret |= of_property_read_u32(info_np, "dma-burst-sz", &info->dma_burst_sz);
282 ret |= of_property_read_u32(info_np, "bpp", &info->bpp);
283 ret |= of_property_read_u32(info_np, "fdd", &info->fdd);
284 ret |= of_property_read_u32(info_np, "sync-edge", &info->sync_edge);
285 ret |= of_property_read_u32(info_np, "sync-ctrl", &info->sync_ctrl);
286 ret |= of_property_read_u32(info_np, "raster-order", &info->raster_order);
287 ret |= of_property_read_u32(info_np, "fifo-th", &info->fifo_th);
288
289 /* optional: */
290 info->tft_alt_mode = of_property_read_bool(info_np, "tft-alt-mode");
291 info->invert_pxl_clk = of_property_read_bool(info_np, "invert-pxl-clk");
292
293 if (ret) {
294 pr_err("%s: error reading panel-info properties\n", __func__);
295 kfree(info);
296 info = NULL;
297 }
298
299put_node:
300 of_node_put(info_np);
301 return info;
302}
303
304static int panel_probe(struct platform_device *pdev)
305{
306 struct device_node *node = pdev->dev.of_node;
307 struct backlight_device *backlight;
308 struct panel_module *panel_mod;
309 struct tilcdc_module *mod;
310 struct pinctrl *pinctrl;
311 int ret;
312
313 /* bail out early if no DT data: */
314 if (!node) {
315 dev_err(&pdev->dev, "device-tree data is missing\n");
316 return -ENXIO;
317 }
318
319 panel_mod = devm_kzalloc(&pdev->dev, sizeof(*panel_mod), GFP_KERNEL);
320 if (!panel_mod)
321 return -ENOMEM;
322
323 backlight = devm_of_find_backlight(&pdev->dev);
324 if (IS_ERR(backlight))
325 return PTR_ERR(backlight);
326 panel_mod->backlight = backlight;
327
328 panel_mod->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable",
329 GPIOD_OUT_LOW);
330 if (IS_ERR(panel_mod->enable_gpio)) {
331 ret = PTR_ERR(panel_mod->enable_gpio);
332 dev_err(&pdev->dev, "failed to request enable GPIO\n");
333 goto fail_backlight;
334 }
335
336 if (panel_mod->enable_gpio)
337 dev_info(&pdev->dev, "found enable GPIO\n");
338
339 mod = &panel_mod->base;
340 pdev->dev.platform_data = mod;
341
342 tilcdc_module_init(mod, "panel", &panel_module_ops);
343
344 pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
345 if (IS_ERR(pinctrl))
346 dev_warn(&pdev->dev, "pins are not configured\n");
347
348 panel_mod->timings = of_get_display_timings(node);
349 if (!panel_mod->timings) {
350 dev_err(&pdev->dev, "could not get panel timings\n");
351 ret = -EINVAL;
352 goto fail_free;
353 }
354
355 panel_mod->info = of_get_panel_info(node);
356 if (!panel_mod->info) {
357 dev_err(&pdev->dev, "could not get panel info\n");
358 ret = -EINVAL;
359 goto fail_timings;
360 }
361
362 return 0;
363
364fail_timings:
365 display_timings_release(panel_mod->timings);
366
367fail_free:
368 tilcdc_module_cleanup(mod);
369
370fail_backlight:
371 if (panel_mod->backlight)
372 put_device(&panel_mod->backlight->dev);
373 return ret;
374}
375
376static int panel_remove(struct platform_device *pdev)
377{
378 struct tilcdc_module *mod = dev_get_platdata(&pdev->dev);
379 struct panel_module *panel_mod = to_panel_module(mod);
380 struct backlight_device *backlight = panel_mod->backlight;
381
382 if (backlight)
383 put_device(&backlight->dev);
384
385 display_timings_release(panel_mod->timings);
386
387 tilcdc_module_cleanup(mod);
388 kfree(panel_mod->info);
389
390 return 0;
391}
392
393static const struct of_device_id panel_of_match[] = {
394 { .compatible = "ti,tilcdc,panel", },
395 { },
396};
397
398static struct platform_driver panel_driver = {
399 .probe = panel_probe,
400 .remove = panel_remove,
401 .driver = {
402 .owner = THIS_MODULE,
403 .name = "tilcdc-panel",
404 .of_match_table = panel_of_match,
405 },
406};
407
408int __init tilcdc_panel_init(void)
409{
410 return platform_driver_register(&panel_driver);
411}
412
413void __exit tilcdc_panel_fini(void)
414{
415 platform_driver_unregister(&panel_driver);
416}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Texas Instruments
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#include <linux/backlight.h>
8#include <linux/gpio/consumer.h>
9#include <linux/pinctrl/consumer.h>
10#include <linux/platform_device.h>
11
12#include <video/display_timing.h>
13#include <video/of_display_timing.h>
14#include <video/videomode.h>
15
16#include <drm/drm_atomic_state_helper.h>
17#include <drm/drm_connector.h>
18#include <drm/drm_modeset_helper_vtables.h>
19#include <drm/drm_probe_helper.h>
20#include <drm/drm_simple_kms_helper.h>
21
22#include "tilcdc_drv.h"
23#include "tilcdc_panel.h"
24
25struct panel_module {
26 struct tilcdc_module base;
27 struct tilcdc_panel_info *info;
28 struct display_timings *timings;
29 struct backlight_device *backlight;
30 struct gpio_desc *enable_gpio;
31};
32#define to_panel_module(x) container_of(x, struct panel_module, base)
33
34
35/*
36 * Encoder:
37 */
38
39struct panel_encoder {
40 struct drm_encoder base;
41 struct panel_module *mod;
42};
43#define to_panel_encoder(x) container_of(x, struct panel_encoder, base)
44
45static void panel_encoder_dpms(struct drm_encoder *encoder, int mode)
46{
47 struct panel_encoder *panel_encoder = to_panel_encoder(encoder);
48 struct backlight_device *backlight = panel_encoder->mod->backlight;
49 struct gpio_desc *gpio = panel_encoder->mod->enable_gpio;
50
51 if (backlight) {
52 backlight->props.power = mode == DRM_MODE_DPMS_ON ?
53 FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
54 backlight_update_status(backlight);
55 }
56
57 if (gpio)
58 gpiod_set_value_cansleep(gpio,
59 mode == DRM_MODE_DPMS_ON ? 1 : 0);
60}
61
62static void panel_encoder_prepare(struct drm_encoder *encoder)
63{
64 panel_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
65}
66
67static void panel_encoder_commit(struct drm_encoder *encoder)
68{
69 panel_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
70}
71
72static void panel_encoder_mode_set(struct drm_encoder *encoder,
73 struct drm_display_mode *mode,
74 struct drm_display_mode *adjusted_mode)
75{
76 /* nothing needed */
77}
78
79static const struct drm_encoder_helper_funcs panel_encoder_helper_funcs = {
80 .dpms = panel_encoder_dpms,
81 .prepare = panel_encoder_prepare,
82 .commit = panel_encoder_commit,
83 .mode_set = panel_encoder_mode_set,
84};
85
86static struct drm_encoder *panel_encoder_create(struct drm_device *dev,
87 struct panel_module *mod)
88{
89 struct panel_encoder *panel_encoder;
90 struct drm_encoder *encoder;
91 int ret;
92
93 panel_encoder = devm_kzalloc(dev->dev, sizeof(*panel_encoder),
94 GFP_KERNEL);
95 if (!panel_encoder)
96 return NULL;
97
98 panel_encoder->mod = mod;
99
100 encoder = &panel_encoder->base;
101 encoder->possible_crtcs = 1;
102
103 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
104 if (ret < 0)
105 goto fail;
106
107 drm_encoder_helper_add(encoder, &panel_encoder_helper_funcs);
108
109 return encoder;
110
111fail:
112 drm_encoder_cleanup(encoder);
113 return NULL;
114}
115
116/*
117 * Connector:
118 */
119
120struct panel_connector {
121 struct drm_connector base;
122
123 struct drm_encoder *encoder; /* our connected encoder */
124 struct panel_module *mod;
125};
126#define to_panel_connector(x) container_of(x, struct panel_connector, base)
127
128
129static void panel_connector_destroy(struct drm_connector *connector)
130{
131 drm_connector_unregister(connector);
132 drm_connector_cleanup(connector);
133}
134
135static int panel_connector_get_modes(struct drm_connector *connector)
136{
137 struct drm_device *dev = connector->dev;
138 struct panel_connector *panel_connector = to_panel_connector(connector);
139 struct display_timings *timings = panel_connector->mod->timings;
140 int i;
141
142 for (i = 0; i < timings->num_timings; i++) {
143 struct drm_display_mode *mode;
144 struct videomode vm;
145
146 if (videomode_from_timings(timings, &vm, i))
147 break;
148
149 mode = drm_mode_create(dev);
150 if (!mode)
151 break;
152
153 drm_display_mode_from_videomode(&vm, mode);
154
155 mode->type = DRM_MODE_TYPE_DRIVER;
156
157 if (timings->native_mode == i)
158 mode->type |= DRM_MODE_TYPE_PREFERRED;
159
160 drm_mode_set_name(mode);
161 drm_mode_probed_add(connector, mode);
162 }
163
164 return i;
165}
166
167static struct drm_encoder *panel_connector_best_encoder(
168 struct drm_connector *connector)
169{
170 struct panel_connector *panel_connector = to_panel_connector(connector);
171 return panel_connector->encoder;
172}
173
174static const struct drm_connector_funcs panel_connector_funcs = {
175 .destroy = panel_connector_destroy,
176 .fill_modes = drm_helper_probe_single_connector_modes,
177 .reset = drm_atomic_helper_connector_reset,
178 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
179 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
180};
181
182static const struct drm_connector_helper_funcs panel_connector_helper_funcs = {
183 .get_modes = panel_connector_get_modes,
184 .best_encoder = panel_connector_best_encoder,
185};
186
187static struct drm_connector *panel_connector_create(struct drm_device *dev,
188 struct panel_module *mod, struct drm_encoder *encoder)
189{
190 struct panel_connector *panel_connector;
191 struct drm_connector *connector;
192 int ret;
193
194 panel_connector = devm_kzalloc(dev->dev, sizeof(*panel_connector),
195 GFP_KERNEL);
196 if (!panel_connector)
197 return NULL;
198
199 panel_connector->encoder = encoder;
200 panel_connector->mod = mod;
201
202 connector = &panel_connector->base;
203
204 drm_connector_init(dev, connector, &panel_connector_funcs,
205 DRM_MODE_CONNECTOR_LVDS);
206 drm_connector_helper_add(connector, &panel_connector_helper_funcs);
207
208 connector->interlace_allowed = 0;
209 connector->doublescan_allowed = 0;
210
211 ret = drm_connector_attach_encoder(connector, encoder);
212 if (ret)
213 goto fail;
214
215 return connector;
216
217fail:
218 panel_connector_destroy(connector);
219 return NULL;
220}
221
222/*
223 * Module:
224 */
225
226static int panel_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
227{
228 struct panel_module *panel_mod = to_panel_module(mod);
229 struct tilcdc_drm_private *priv = dev->dev_private;
230 struct drm_encoder *encoder;
231 struct drm_connector *connector;
232
233 encoder = panel_encoder_create(dev, panel_mod);
234 if (!encoder)
235 return -ENOMEM;
236
237 connector = panel_connector_create(dev, panel_mod, encoder);
238 if (!connector)
239 return -ENOMEM;
240
241 priv->encoders[priv->num_encoders++] = encoder;
242 priv->connectors[priv->num_connectors++] = connector;
243
244 tilcdc_crtc_set_panel_info(priv->crtc,
245 to_panel_encoder(encoder)->mod->info);
246
247 return 0;
248}
249
250static const struct tilcdc_module_ops panel_module_ops = {
251 .modeset_init = panel_modeset_init,
252};
253
254/*
255 * Device:
256 */
257
258/* maybe move this somewhere common if it is needed by other outputs? */
259static struct tilcdc_panel_info *of_get_panel_info(struct device_node *np)
260{
261 struct device_node *info_np;
262 struct tilcdc_panel_info *info;
263 int ret = 0;
264
265 if (!np) {
266 pr_err("%s: no devicenode given\n", __func__);
267 return NULL;
268 }
269
270 info_np = of_get_child_by_name(np, "panel-info");
271 if (!info_np) {
272 pr_err("%s: could not find panel-info node\n", __func__);
273 return NULL;
274 }
275
276 info = kzalloc(sizeof(*info), GFP_KERNEL);
277 if (!info)
278 goto put_node;
279
280 ret |= of_property_read_u32(info_np, "ac-bias", &info->ac_bias);
281 ret |= of_property_read_u32(info_np, "ac-bias-intrpt", &info->ac_bias_intrpt);
282 ret |= of_property_read_u32(info_np, "dma-burst-sz", &info->dma_burst_sz);
283 ret |= of_property_read_u32(info_np, "bpp", &info->bpp);
284 ret |= of_property_read_u32(info_np, "fdd", &info->fdd);
285 ret |= of_property_read_u32(info_np, "sync-edge", &info->sync_edge);
286 ret |= of_property_read_u32(info_np, "sync-ctrl", &info->sync_ctrl);
287 ret |= of_property_read_u32(info_np, "raster-order", &info->raster_order);
288 ret |= of_property_read_u32(info_np, "fifo-th", &info->fifo_th);
289
290 /* optional: */
291 info->tft_alt_mode = of_property_read_bool(info_np, "tft-alt-mode");
292 info->invert_pxl_clk = of_property_read_bool(info_np, "invert-pxl-clk");
293
294 if (ret) {
295 pr_err("%s: error reading panel-info properties\n", __func__);
296 kfree(info);
297 info = NULL;
298 }
299
300put_node:
301 of_node_put(info_np);
302 return info;
303}
304
305static int panel_probe(struct platform_device *pdev)
306{
307 struct device_node *node = pdev->dev.of_node;
308 struct backlight_device *backlight;
309 struct panel_module *panel_mod;
310 struct tilcdc_module *mod;
311 struct pinctrl *pinctrl;
312 int ret;
313
314 /* bail out early if no DT data: */
315 if (!node) {
316 dev_err(&pdev->dev, "device-tree data is missing\n");
317 return -ENXIO;
318 }
319
320 panel_mod = devm_kzalloc(&pdev->dev, sizeof(*panel_mod), GFP_KERNEL);
321 if (!panel_mod)
322 return -ENOMEM;
323
324 backlight = devm_of_find_backlight(&pdev->dev);
325 if (IS_ERR(backlight))
326 return PTR_ERR(backlight);
327 panel_mod->backlight = backlight;
328
329 panel_mod->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable",
330 GPIOD_OUT_LOW);
331 if (IS_ERR(panel_mod->enable_gpio)) {
332 ret = PTR_ERR(panel_mod->enable_gpio);
333 dev_err(&pdev->dev, "failed to request enable GPIO\n");
334 goto fail_backlight;
335 }
336
337 if (panel_mod->enable_gpio)
338 dev_info(&pdev->dev, "found enable GPIO\n");
339
340 mod = &panel_mod->base;
341 pdev->dev.platform_data = mod;
342
343 tilcdc_module_init(mod, "panel", &panel_module_ops);
344
345 pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
346 if (IS_ERR(pinctrl))
347 dev_warn(&pdev->dev, "pins are not configured\n");
348
349 panel_mod->timings = of_get_display_timings(node);
350 if (!panel_mod->timings) {
351 dev_err(&pdev->dev, "could not get panel timings\n");
352 ret = -EINVAL;
353 goto fail_free;
354 }
355
356 panel_mod->info = of_get_panel_info(node);
357 if (!panel_mod->info) {
358 dev_err(&pdev->dev, "could not get panel info\n");
359 ret = -EINVAL;
360 goto fail_timings;
361 }
362
363 return 0;
364
365fail_timings:
366 display_timings_release(panel_mod->timings);
367
368fail_free:
369 tilcdc_module_cleanup(mod);
370
371fail_backlight:
372 if (panel_mod->backlight)
373 put_device(&panel_mod->backlight->dev);
374 return ret;
375}
376
377static void panel_remove(struct platform_device *pdev)
378{
379 struct tilcdc_module *mod = dev_get_platdata(&pdev->dev);
380 struct panel_module *panel_mod = to_panel_module(mod);
381 struct backlight_device *backlight = panel_mod->backlight;
382
383 if (backlight)
384 put_device(&backlight->dev);
385
386 display_timings_release(panel_mod->timings);
387
388 tilcdc_module_cleanup(mod);
389 kfree(panel_mod->info);
390}
391
392static const struct of_device_id panel_of_match[] = {
393 { .compatible = "ti,tilcdc,panel", },
394 { },
395};
396
397static struct platform_driver panel_driver = {
398 .probe = panel_probe,
399 .remove_new = panel_remove,
400 .driver = {
401 .name = "tilcdc-panel",
402 .of_match_table = panel_of_match,
403 },
404};
405
406int __init tilcdc_panel_init(void)
407{
408 return platform_driver_register(&panel_driver);
409}
410
411void __exit tilcdc_panel_fini(void)
412{
413 platform_driver_unregister(&panel_driver);
414}