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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_drv.h>
23#include <drm/drm_fb_cma_helper.h>
24#include <drm/drm_fb_helper.h>
25#include <drm/drm_gem_cma_helper.h>
26#include <drm/drm_irq.h>
27#include <drm/drm_modeset_helper.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_uninstall(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 int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
63{
64 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
65 int ret;
66
67 ret = fsl_dcu_drm_modeset_init(fsl_dev);
68 if (ret < 0) {
69 dev_err(dev->dev, "failed to initialize mode setting\n");
70 return ret;
71 }
72
73 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
74 if (ret < 0) {
75 dev_err(dev->dev, "failed to initialize vblank\n");
76 goto done;
77 }
78
79 ret = drm_irq_install(dev, fsl_dev->irq);
80 if (ret < 0) {
81 dev_err(dev->dev, "failed to install IRQ handler\n");
82 goto done;
83 }
84
85 if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
86 legacyfb_depth != 32) {
87 dev_warn(dev->dev,
88 "Invalid legacyfb_depth. Defaulting to 24bpp\n");
89 legacyfb_depth = 24;
90 }
91
92 return 0;
93done:
94 drm_kms_helper_poll_fini(dev);
95
96 drm_mode_config_cleanup(dev);
97 drm_irq_uninstall(dev);
98 dev->dev_private = NULL;
99
100 return ret;
101}
102
103static void fsl_dcu_unload(struct drm_device *dev)
104{
105 drm_atomic_helper_shutdown(dev);
106 drm_kms_helper_poll_fini(dev);
107
108 drm_mode_config_cleanup(dev);
109 drm_irq_uninstall(dev);
110
111 dev->dev_private = NULL;
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
132 return IRQ_HANDLED;
133}
134
135DEFINE_DRM_GEM_CMA_FOPS(fsl_dcu_drm_fops);
136
137static struct drm_driver fsl_dcu_drm_driver = {
138 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
139 .load = fsl_dcu_load,
140 .unload = fsl_dcu_unload,
141 .irq_handler = fsl_dcu_drm_irq,
142 .irq_preinstall = fsl_dcu_irq_uninstall,
143 .irq_uninstall = fsl_dcu_irq_uninstall,
144 .gem_free_object_unlocked = drm_gem_cma_free_object,
145 .gem_vm_ops = &drm_gem_cma_vm_ops,
146 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
147 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
148 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
149 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
150 .gem_prime_vmap = drm_gem_cma_prime_vmap,
151 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
152 .gem_prime_mmap = drm_gem_cma_prime_mmap,
153 .dumb_create = drm_gem_cma_dumb_create,
154 .fops = &fsl_dcu_drm_fops,
155 .name = "fsl-dcu-drm",
156 .desc = "Freescale DCU DRM",
157 .date = "20160425",
158 .major = 1,
159 .minor = 1,
160};
161
162#ifdef CONFIG_PM_SLEEP
163static int fsl_dcu_drm_pm_suspend(struct device *dev)
164{
165 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
166 int ret;
167
168 if (!fsl_dev)
169 return 0;
170
171 disable_irq(fsl_dev->irq);
172
173 ret = drm_mode_config_helper_suspend(fsl_dev->drm);
174 if (ret) {
175 enable_irq(fsl_dev->irq);
176 return ret;
177 }
178
179 clk_disable_unprepare(fsl_dev->clk);
180
181 return 0;
182}
183
184static int fsl_dcu_drm_pm_resume(struct device *dev)
185{
186 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
187 int ret;
188
189 if (!fsl_dev)
190 return 0;
191
192 ret = clk_prepare_enable(fsl_dev->clk);
193 if (ret < 0) {
194 dev_err(dev, "failed to enable dcu clk\n");
195 return ret;
196 }
197
198 if (fsl_dev->tcon)
199 fsl_tcon_bypass_enable(fsl_dev->tcon);
200 fsl_dcu_drm_init_planes(fsl_dev->drm);
201 enable_irq(fsl_dev->irq);
202
203 drm_mode_config_helper_resume(fsl_dev->drm);
204
205 return 0;
206}
207#endif
208
209static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
210 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
211};
212
213static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
214 .name = "ls1021a",
215 .total_layer = 16,
216 .max_layer = 4,
217 .layer_regs = LS1021A_LAYER_REG_NUM,
218};
219
220static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
221 .name = "vf610",
222 .total_layer = 64,
223 .max_layer = 6,
224 .layer_regs = VF610_LAYER_REG_NUM,
225};
226
227static const struct of_device_id fsl_dcu_of_match[] = {
228 {
229 .compatible = "fsl,ls1021a-dcu",
230 .data = &fsl_dcu_ls1021a_data,
231 }, {
232 .compatible = "fsl,vf610-dcu",
233 .data = &fsl_dcu_vf610_data,
234 }, {
235 },
236};
237MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
238
239static int fsl_dcu_drm_probe(struct platform_device *pdev)
240{
241 struct fsl_dcu_drm_device *fsl_dev;
242 struct drm_device *drm;
243 struct device *dev = &pdev->dev;
244 struct resource *res;
245 void __iomem *base;
246 struct drm_driver *driver = &fsl_dcu_drm_driver;
247 struct clk *pix_clk_in;
248 char pix_clk_name[32];
249 const char *pix_clk_in_name;
250 const struct of_device_id *id;
251 int ret;
252 u8 div_ratio_shift = 0;
253
254 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
255 if (!fsl_dev)
256 return -ENOMEM;
257
258 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
259 if (!id)
260 return -ENODEV;
261 fsl_dev->soc = id->data;
262
263 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
264 base = devm_ioremap_resource(dev, res);
265 if (IS_ERR(base)) {
266 ret = PTR_ERR(base);
267 return ret;
268 }
269
270 fsl_dev->irq = platform_get_irq(pdev, 0);
271 if (fsl_dev->irq < 0) {
272 dev_err(dev, "failed to get irq\n");
273 return fsl_dev->irq;
274 }
275
276 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
277 &fsl_dcu_regmap_config);
278 if (IS_ERR(fsl_dev->regmap)) {
279 dev_err(dev, "regmap init failed\n");
280 return PTR_ERR(fsl_dev->regmap);
281 }
282
283 fsl_dev->clk = devm_clk_get(dev, "dcu");
284 if (IS_ERR(fsl_dev->clk)) {
285 dev_err(dev, "failed to get dcu clock\n");
286 return PTR_ERR(fsl_dev->clk);
287 }
288 ret = clk_prepare_enable(fsl_dev->clk);
289 if (ret < 0) {
290 dev_err(dev, "failed to enable dcu clk\n");
291 return ret;
292 }
293
294 pix_clk_in = devm_clk_get(dev, "pix");
295 if (IS_ERR(pix_clk_in)) {
296 /* legancy binding, use dcu clock as pixel clock input */
297 pix_clk_in = fsl_dev->clk;
298 }
299
300 if (of_property_read_bool(dev->of_node, "big-endian"))
301 div_ratio_shift = 24;
302
303 pix_clk_in_name = __clk_get_name(pix_clk_in);
304 snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
305 fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
306 pix_clk_in_name, 0, base + DCU_DIV_RATIO,
307 div_ratio_shift, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
308 if (IS_ERR(fsl_dev->pix_clk)) {
309 dev_err(dev, "failed to register pix clk\n");
310 ret = PTR_ERR(fsl_dev->pix_clk);
311 goto disable_clk;
312 }
313
314 fsl_dev->tcon = fsl_tcon_init(dev);
315
316 drm = drm_dev_alloc(driver, dev);
317 if (IS_ERR(drm)) {
318 ret = PTR_ERR(drm);
319 goto unregister_pix_clk;
320 }
321
322 fsl_dev->dev = dev;
323 fsl_dev->drm = drm;
324 fsl_dev->np = dev->of_node;
325 drm->dev_private = fsl_dev;
326 dev_set_drvdata(dev, fsl_dev);
327
328 ret = drm_dev_register(drm, 0);
329 if (ret < 0)
330 goto put;
331
332 drm_fbdev_generic_setup(drm, legacyfb_depth);
333
334 return 0;
335
336put:
337 drm_dev_put(drm);
338unregister_pix_clk:
339 clk_unregister(fsl_dev->pix_clk);
340disable_clk:
341 clk_disable_unprepare(fsl_dev->clk);
342 return ret;
343}
344
345static int fsl_dcu_drm_remove(struct platform_device *pdev)
346{
347 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
348
349 drm_dev_unregister(fsl_dev->drm);
350 drm_dev_put(fsl_dev->drm);
351 clk_disable_unprepare(fsl_dev->clk);
352 clk_unregister(fsl_dev->pix_clk);
353
354 return 0;
355}
356
357static struct platform_driver fsl_dcu_drm_platform_driver = {
358 .probe = fsl_dcu_drm_probe,
359 .remove = fsl_dcu_drm_remove,
360 .driver = {
361 .name = "fsl-dcu",
362 .pm = &fsl_dcu_drm_pm_ops,
363 .of_match_table = fsl_dcu_of_match,
364 },
365};
366
367module_platform_driver(fsl_dcu_drm_platform_driver);
368
369MODULE_DESCRIPTION("Freescale DCU DRM Driver");
370MODULE_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");