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1/*
2 * Copyright 2015 Freescale Semiconductor, Inc.
3 *
4 * Freescale DCU drm device driver
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <linux/clk.h>
13#include <linux/clk-provider.h>
14#include <linux/io.h>
15#include <linux/mfd/syscon.h>
16#include <linux/mm.h>
17#include <linux/module.h>
18#include <linux/of_platform.h>
19#include <linux/platform_device.h>
20#include <linux/pm.h>
21#include <linux/pm_runtime.h>
22#include <linux/regmap.h>
23
24#include <drm/drmP.h>
25#include <drm/drm_crtc_helper.h>
26#include <drm/drm_gem_cma_helper.h>
27
28#include "fsl_dcu_drm_crtc.h"
29#include "fsl_dcu_drm_drv.h"
30
31static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
32{
33 if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
34 return true;
35
36 return false;
37}
38
39static const struct regmap_config fsl_dcu_regmap_config = {
40 .reg_bits = 32,
41 .reg_stride = 4,
42 .val_bits = 32,
43 .cache_type = REGCACHE_RBTREE,
44
45 .volatile_reg = fsl_dcu_drm_is_volatile_reg,
46};
47
48static int fsl_dcu_drm_irq_init(struct drm_device *dev)
49{
50 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
51 int ret;
52
53 ret = drm_irq_install(dev, fsl_dev->irq);
54 if (ret < 0)
55 dev_err(dev->dev, "failed to install IRQ handler\n");
56
57 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
58 regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
59 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
60 DCU_UPDATE_MODE_READREG);
61
62 return ret;
63}
64
65static int fsl_dcu_load(struct drm_device *drm, unsigned long flags)
66{
67 struct device *dev = drm->dev;
68 struct fsl_dcu_drm_device *fsl_dev = drm->dev_private;
69 int ret;
70
71 ret = fsl_dcu_drm_modeset_init(fsl_dev);
72 if (ret < 0) {
73 dev_err(dev, "failed to initialize mode setting\n");
74 return ret;
75 }
76
77 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
78 if (ret < 0) {
79 dev_err(dev, "failed to initialize vblank\n");
80 goto done;
81 }
82 drm->vblank_disable_allowed = true;
83
84 ret = fsl_dcu_drm_irq_init(drm);
85 if (ret < 0)
86 goto done;
87 drm->irq_enabled = true;
88
89 fsl_dcu_fbdev_init(drm);
90
91 return 0;
92done:
93 if (ret) {
94 drm_mode_config_cleanup(drm);
95 drm_vblank_cleanup(drm);
96 drm_irq_uninstall(drm);
97 drm->dev_private = NULL;
98 }
99
100 return ret;
101}
102
103static int fsl_dcu_unload(struct drm_device *dev)
104{
105 drm_mode_config_cleanup(dev);
106 drm_vblank_cleanup(dev);
107 drm_irq_uninstall(dev);
108
109 dev->dev_private = NULL;
110
111 return 0;
112}
113
114static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
115{
116 struct drm_device *dev = arg;
117 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
118 unsigned int int_status;
119 int ret;
120
121 ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
122 if (ret) {
123 dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
124 return IRQ_NONE;
125 }
126
127 if (int_status & DCU_INT_STATUS_VBLANK)
128 drm_handle_vblank(dev, 0);
129
130 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
131 regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
132 DCU_UPDATE_MODE_READREG);
133
134 return IRQ_HANDLED;
135}
136
137static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
138{
139 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
140 unsigned int value;
141
142 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
143 value &= ~DCU_INT_MASK_VBLANK;
144 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
145
146 return 0;
147}
148
149static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
150 unsigned int pipe)
151{
152 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
153 unsigned int value;
154
155 regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
156 value |= DCU_INT_MASK_VBLANK;
157 regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
158}
159
160static const struct file_operations fsl_dcu_drm_fops = {
161 .owner = THIS_MODULE,
162 .open = drm_open,
163 .release = drm_release,
164 .unlocked_ioctl = drm_ioctl,
165#ifdef CONFIG_COMPAT
166 .compat_ioctl = drm_compat_ioctl,
167#endif
168 .poll = drm_poll,
169 .read = drm_read,
170 .llseek = no_llseek,
171 .mmap = drm_gem_cma_mmap,
172};
173
174static struct drm_driver fsl_dcu_drm_driver = {
175 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
176 | DRIVER_PRIME | DRIVER_ATOMIC,
177 .load = fsl_dcu_load,
178 .unload = fsl_dcu_unload,
179 .irq_handler = fsl_dcu_drm_irq,
180 .get_vblank_counter = drm_vblank_no_hw_counter,
181 .enable_vblank = fsl_dcu_drm_enable_vblank,
182 .disable_vblank = fsl_dcu_drm_disable_vblank,
183 .gem_free_object = drm_gem_cma_free_object,
184 .gem_vm_ops = &drm_gem_cma_vm_ops,
185 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
186 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
187 .gem_prime_import = drm_gem_prime_import,
188 .gem_prime_export = drm_gem_prime_export,
189 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
190 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
191 .gem_prime_vmap = drm_gem_cma_prime_vmap,
192 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
193 .gem_prime_mmap = drm_gem_cma_prime_mmap,
194 .dumb_create = drm_gem_cma_dumb_create,
195 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
196 .dumb_destroy = drm_gem_dumb_destroy,
197 .fops = &fsl_dcu_drm_fops,
198 .name = "fsl-dcu-drm",
199 .desc = "Freescale DCU DRM",
200 .date = "20150213",
201 .major = 1,
202 .minor = 0,
203};
204
205#ifdef CONFIG_PM_SLEEP
206static int fsl_dcu_drm_pm_suspend(struct device *dev)
207{
208 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
209
210 if (!fsl_dev)
211 return 0;
212
213 drm_kms_helper_poll_disable(fsl_dev->drm);
214 regcache_cache_only(fsl_dev->regmap, true);
215 regcache_mark_dirty(fsl_dev->regmap);
216 clk_disable(fsl_dev->clk);
217 clk_unprepare(fsl_dev->clk);
218
219 return 0;
220}
221
222static int fsl_dcu_drm_pm_resume(struct device *dev)
223{
224 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
225 int ret;
226
227 if (!fsl_dev)
228 return 0;
229
230 ret = clk_enable(fsl_dev->clk);
231 if (ret < 0) {
232 dev_err(dev, "failed to enable dcu clk\n");
233 clk_unprepare(fsl_dev->clk);
234 return ret;
235 }
236 ret = clk_prepare(fsl_dev->clk);
237 if (ret < 0) {
238 dev_err(dev, "failed to prepare dcu clk\n");
239 return ret;
240 }
241
242 drm_kms_helper_poll_enable(fsl_dev->drm);
243 regcache_cache_only(fsl_dev->regmap, false);
244 regcache_sync(fsl_dev->regmap);
245
246 return 0;
247}
248#endif
249
250static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
251 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
252};
253
254static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
255 .name = "ls1021a",
256 .total_layer = 16,
257 .max_layer = 4,
258};
259
260static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
261 .name = "vf610",
262 .total_layer = 64,
263 .max_layer = 6,
264};
265
266static const struct of_device_id fsl_dcu_of_match[] = {
267 {
268 .compatible = "fsl,ls1021a-dcu",
269 .data = &fsl_dcu_ls1021a_data,
270 }, {
271 .compatible = "fsl,vf610-dcu",
272 .data = &fsl_dcu_vf610_data,
273 }, {
274 },
275};
276MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
277
278static int fsl_dcu_drm_probe(struct platform_device *pdev)
279{
280 struct fsl_dcu_drm_device *fsl_dev;
281 struct drm_device *drm;
282 struct device *dev = &pdev->dev;
283 struct resource *res;
284 void __iomem *base;
285 struct drm_driver *driver = &fsl_dcu_drm_driver;
286 const struct of_device_id *id;
287 int ret;
288
289 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
290 if (!fsl_dev)
291 return -ENOMEM;
292
293 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
294 if (!res) {
295 dev_err(dev, "could not get memory IO resource\n");
296 return -ENODEV;
297 }
298
299 base = devm_ioremap_resource(dev, res);
300 if (IS_ERR(base)) {
301 ret = PTR_ERR(base);
302 return ret;
303 }
304
305 fsl_dev->irq = platform_get_irq(pdev, 0);
306 if (fsl_dev->irq < 0) {
307 dev_err(dev, "failed to get irq\n");
308 return -ENXIO;
309 }
310
311 fsl_dev->clk = devm_clk_get(dev, "dcu");
312 if (IS_ERR(fsl_dev->clk)) {
313 ret = PTR_ERR(fsl_dev->clk);
314 dev_err(dev, "failed to get dcu clock\n");
315 return ret;
316 }
317 ret = clk_prepare(fsl_dev->clk);
318 if (ret < 0) {
319 dev_err(dev, "failed to prepare dcu clk\n");
320 return ret;
321 }
322 ret = clk_enable(fsl_dev->clk);
323 if (ret < 0) {
324 dev_err(dev, "failed to enable dcu clk\n");
325 clk_unprepare(fsl_dev->clk);
326 return ret;
327 }
328
329 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
330 &fsl_dcu_regmap_config);
331 if (IS_ERR(fsl_dev->regmap)) {
332 dev_err(dev, "regmap init failed\n");
333 return PTR_ERR(fsl_dev->regmap);
334 }
335
336 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
337 if (!id)
338 return -ENODEV;
339 fsl_dev->soc = id->data;
340
341 drm = drm_dev_alloc(driver, dev);
342 if (!drm)
343 return -ENOMEM;
344
345 fsl_dev->dev = dev;
346 fsl_dev->drm = drm;
347 fsl_dev->np = dev->of_node;
348 drm->dev_private = fsl_dev;
349 dev_set_drvdata(dev, fsl_dev);
350
351 ret = drm_dev_register(drm, 0);
352 if (ret < 0)
353 goto unref;
354
355 DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
356 driver->major, driver->minor, driver->patchlevel,
357 driver->date, drm->primary->index);
358
359 return 0;
360
361unref:
362 drm_dev_unref(drm);
363 return ret;
364}
365
366static int fsl_dcu_drm_remove(struct platform_device *pdev)
367{
368 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
369
370 drm_put_dev(fsl_dev->drm);
371
372 return 0;
373}
374
375static struct platform_driver fsl_dcu_drm_platform_driver = {
376 .probe = fsl_dcu_drm_probe,
377 .remove = fsl_dcu_drm_remove,
378 .driver = {
379 .name = "fsl-dcu",
380 .pm = &fsl_dcu_drm_pm_ops,
381 .of_match_table = fsl_dcu_of_match,
382 },
383};
384
385module_platform_driver(fsl_dcu_drm_platform_driver);
386
387MODULE_DESCRIPTION("Freescale DCU DRM Driver");
388MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 2015 Freescale Semiconductor, Inc.
4 *
5 * Freescale DCU drm device driver
6 */
7
8#include <linux/clk.h>
9#include <linux/clk-provider.h>
10#include <linux/console.h>
11#include <linux/io.h>
12#include <linux/mfd/syscon.h>
13#include <linux/mm.h>
14#include <linux/module.h>
15#include <linux/of_platform.h>
16#include <linux/platform_device.h>
17#include <linux/pm.h>
18#include <linux/pm_runtime.h>
19#include <linux/regmap.h>
20
21#include <drm/drm_atomic_helper.h>
22#include <drm/drm_client_setup.h>
23#include <drm/drm_drv.h>
24#include <drm/drm_fbdev_dma.h>
25#include <drm/drm_gem_dma_helper.h>
26#include <drm/drm_modeset_helper.h>
27#include <drm/drm_module.h>
28#include <drm/drm_probe_helper.h>
29#include <drm/drm_vblank.h>
30
31#include "fsl_dcu_drm_crtc.h"
32#include "fsl_dcu_drm_drv.h"
33#include "fsl_tcon.h"
34
35static int legacyfb_depth = 24;
36module_param(legacyfb_depth, int, 0444);
37
38static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
39{
40 if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
41 return true;
42
43 return false;
44}
45
46static const struct regmap_config fsl_dcu_regmap_config = {
47 .reg_bits = 32,
48 .reg_stride = 4,
49 .val_bits = 32,
50
51 .volatile_reg = fsl_dcu_drm_is_volatile_reg,
52};
53
54static void fsl_dcu_irq_reset(struct drm_device *dev)
55{
56 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
57
58 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, ~0);
59 regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
60}
61
62static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
63{
64 struct drm_device *dev = arg;
65 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
66 unsigned int int_status;
67 int ret;
68
69 ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
70 if (ret) {
71 dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
72 return IRQ_NONE;
73 }
74
75 if (int_status & DCU_INT_STATUS_VBLANK)
76 drm_handle_vblank(dev, 0);
77
78 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
79
80 return IRQ_HANDLED;
81}
82
83static int fsl_dcu_irq_install(struct drm_device *dev, unsigned int irq)
84{
85 if (irq == IRQ_NOTCONNECTED)
86 return -ENOTCONN;
87
88 fsl_dcu_irq_reset(dev);
89
90 return request_irq(irq, fsl_dcu_drm_irq, 0, dev->driver->name, dev);
91}
92
93static void fsl_dcu_irq_uninstall(struct drm_device *dev)
94{
95 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
96
97 fsl_dcu_irq_reset(dev);
98 free_irq(fsl_dev->irq, dev);
99}
100
101static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
102{
103 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
104 struct regmap *scfg;
105 int ret;
106
107 ret = fsl_dcu_drm_modeset_init(fsl_dev);
108 if (ret < 0)
109 return dev_err_probe(dev->dev, ret, "failed to initialize mode setting\n");
110
111 scfg = syscon_regmap_lookup_by_compatible("fsl,ls1021a-scfg");
112 if (PTR_ERR(scfg) != -ENODEV) {
113 /*
114 * For simplicity, enable the PIXCLK unconditionally,
115 * resulting in increased power consumption. Disabling
116 * the clock in PM or on unload could be implemented as
117 * a future improvement.
118 */
119 ret = regmap_update_bits(scfg, SCFG_PIXCLKCR, SCFG_PIXCLKCR_PXCEN,
120 SCFG_PIXCLKCR_PXCEN);
121 if (ret < 0)
122 return dev_err_probe(dev->dev, ret, "failed to enable pixclk\n");
123 }
124
125 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
126 if (ret < 0) {
127 dev_err(dev->dev, "failed to initialize vblank\n");
128 goto done_vblank;
129 }
130
131 ret = fsl_dcu_irq_install(dev, fsl_dev->irq);
132 if (ret < 0) {
133 dev_err(dev->dev, "failed to install IRQ handler\n");
134 goto done_irq;
135 }
136
137 if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
138 legacyfb_depth != 32) {
139 dev_warn(dev->dev,
140 "Invalid legacyfb_depth. Defaulting to 24bpp\n");
141 legacyfb_depth = 24;
142 }
143
144 return 0;
145done_irq:
146 drm_kms_helper_poll_fini(dev);
147
148 drm_mode_config_cleanup(dev);
149done_vblank:
150 dev->dev_private = NULL;
151
152 return ret;
153}
154
155static void fsl_dcu_unload(struct drm_device *dev)
156{
157 drm_atomic_helper_shutdown(dev);
158 drm_kms_helper_poll_fini(dev);
159
160 drm_mode_config_cleanup(dev);
161 fsl_dcu_irq_uninstall(dev);
162
163 dev->dev_private = NULL;
164}
165
166DEFINE_DRM_GEM_DMA_FOPS(fsl_dcu_drm_fops);
167
168static const struct drm_driver fsl_dcu_drm_driver = {
169 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
170 .load = fsl_dcu_load,
171 .unload = fsl_dcu_unload,
172 DRM_GEM_DMA_DRIVER_OPS,
173 DRM_FBDEV_DMA_DRIVER_OPS,
174 .fops = &fsl_dcu_drm_fops,
175 .name = "fsl-dcu-drm",
176 .desc = "Freescale DCU DRM",
177 .date = "20160425",
178 .major = 1,
179 .minor = 1,
180};
181
182#ifdef CONFIG_PM_SLEEP
183static int fsl_dcu_drm_pm_suspend(struct device *dev)
184{
185 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
186 int ret;
187
188 if (!fsl_dev)
189 return 0;
190
191 disable_irq(fsl_dev->irq);
192
193 ret = drm_mode_config_helper_suspend(fsl_dev->drm);
194 if (ret) {
195 enable_irq(fsl_dev->irq);
196 return ret;
197 }
198
199 clk_disable_unprepare(fsl_dev->clk);
200
201 return 0;
202}
203
204static int fsl_dcu_drm_pm_resume(struct device *dev)
205{
206 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
207 int ret;
208
209 if (!fsl_dev)
210 return 0;
211
212 ret = clk_prepare_enable(fsl_dev->clk);
213 if (ret < 0) {
214 dev_err(dev, "failed to enable dcu clk\n");
215 return ret;
216 }
217
218 if (fsl_dev->tcon)
219 fsl_tcon_bypass_enable(fsl_dev->tcon);
220 fsl_dcu_drm_init_planes(fsl_dev->drm);
221 enable_irq(fsl_dev->irq);
222
223 drm_mode_config_helper_resume(fsl_dev->drm);
224
225 return 0;
226}
227#endif
228
229static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
230 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
231};
232
233static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
234 .name = "ls1021a",
235 .total_layer = 16,
236 .max_layer = 4,
237 .layer_regs = LS1021A_LAYER_REG_NUM,
238};
239
240static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
241 .name = "vf610",
242 .total_layer = 64,
243 .max_layer = 6,
244 .layer_regs = VF610_LAYER_REG_NUM,
245};
246
247static const struct of_device_id fsl_dcu_of_match[] = {
248 {
249 .compatible = "fsl,ls1021a-dcu",
250 .data = &fsl_dcu_ls1021a_data,
251 }, {
252 .compatible = "fsl,vf610-dcu",
253 .data = &fsl_dcu_vf610_data,
254 }, {
255 },
256};
257MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
258
259static int fsl_dcu_drm_probe(struct platform_device *pdev)
260{
261 struct fsl_dcu_drm_device *fsl_dev;
262 struct drm_device *drm;
263 struct device *dev = &pdev->dev;
264 struct resource *res;
265 void __iomem *base;
266 struct clk *pix_clk_in;
267 char pix_clk_name[32];
268 const char *pix_clk_in_name;
269 const struct of_device_id *id;
270 int ret;
271 u8 div_ratio_shift = 0;
272
273 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
274 if (!fsl_dev)
275 return -ENOMEM;
276
277 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
278 if (!id)
279 return -ENODEV;
280 fsl_dev->soc = id->data;
281
282 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
283 base = devm_ioremap_resource(dev, res);
284 if (IS_ERR(base)) {
285 ret = PTR_ERR(base);
286 return ret;
287 }
288
289 fsl_dev->irq = platform_get_irq(pdev, 0);
290 if (fsl_dev->irq < 0)
291 return fsl_dev->irq;
292
293 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
294 &fsl_dcu_regmap_config);
295 if (IS_ERR(fsl_dev->regmap)) {
296 dev_err(dev, "regmap init failed\n");
297 return PTR_ERR(fsl_dev->regmap);
298 }
299
300 fsl_dev->clk = devm_clk_get(dev, "dcu");
301 if (IS_ERR(fsl_dev->clk)) {
302 dev_err(dev, "failed to get dcu clock\n");
303 return PTR_ERR(fsl_dev->clk);
304 }
305 ret = clk_prepare_enable(fsl_dev->clk);
306 if (ret < 0) {
307 dev_err(dev, "failed to enable dcu clk\n");
308 return ret;
309 }
310
311 pix_clk_in = devm_clk_get(dev, "pix");
312 if (IS_ERR(pix_clk_in)) {
313 /* legancy binding, use dcu clock as pixel clock input */
314 pix_clk_in = fsl_dev->clk;
315 }
316
317 if (of_property_read_bool(dev->of_node, "big-endian"))
318 div_ratio_shift = 24;
319
320 pix_clk_in_name = __clk_get_name(pix_clk_in);
321 snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
322 fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
323 pix_clk_in_name, 0, base + DCU_DIV_RATIO,
324 div_ratio_shift, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
325 if (IS_ERR(fsl_dev->pix_clk)) {
326 dev_err(dev, "failed to register pix clk\n");
327 ret = PTR_ERR(fsl_dev->pix_clk);
328 goto disable_clk;
329 }
330
331 fsl_dev->tcon = fsl_tcon_init(dev);
332
333 drm = drm_dev_alloc(&fsl_dcu_drm_driver, dev);
334 if (IS_ERR(drm)) {
335 ret = PTR_ERR(drm);
336 goto unregister_pix_clk;
337 }
338
339 fsl_dev->dev = dev;
340 fsl_dev->drm = drm;
341 fsl_dev->np = dev->of_node;
342 drm->dev_private = fsl_dev;
343 dev_set_drvdata(dev, fsl_dev);
344
345 ret = drm_dev_register(drm, 0);
346 if (ret < 0)
347 goto put;
348
349 drm_client_setup_with_color_mode(drm, legacyfb_depth);
350
351 return 0;
352
353put:
354 drm_dev_put(drm);
355unregister_pix_clk:
356 clk_unregister(fsl_dev->pix_clk);
357disable_clk:
358 clk_disable_unprepare(fsl_dev->clk);
359 return ret;
360}
361
362static void fsl_dcu_drm_remove(struct platform_device *pdev)
363{
364 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
365
366 drm_dev_unregister(fsl_dev->drm);
367 drm_dev_put(fsl_dev->drm);
368 clk_disable_unprepare(fsl_dev->clk);
369 clk_unregister(fsl_dev->pix_clk);
370}
371
372static void fsl_dcu_drm_shutdown(struct platform_device *pdev)
373{
374 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
375
376 drm_atomic_helper_shutdown(fsl_dev->drm);
377}
378
379static struct platform_driver fsl_dcu_drm_platform_driver = {
380 .probe = fsl_dcu_drm_probe,
381 .remove = fsl_dcu_drm_remove,
382 .shutdown = fsl_dcu_drm_shutdown,
383 .driver = {
384 .name = "fsl-dcu",
385 .pm = &fsl_dcu_drm_pm_ops,
386 .of_match_table = fsl_dcu_of_match,
387 },
388};
389
390drm_module_platform_driver(fsl_dcu_drm_platform_driver);
391
392MODULE_DESCRIPTION("Freescale DCU DRM Driver");
393MODULE_LICENSE("GPL");