This source file includes following definitions.
- drm_pipe_to_mxsfb_drm_private
- mxsfb_enable_axi_clk
- mxsfb_disable_axi_clk
- mxsfb_pipe_enable
- mxsfb_pipe_disable
- mxsfb_pipe_update
- mxsfb_pipe_enable_vblank
- mxsfb_pipe_disable_vblank
- mxsfb_load
- mxsfb_unload
- mxsfb_irq_preinstall
- mxsfb_irq_handler
- mxsfb_probe
- mxsfb_remove
- mxsfb_suspend
- mxsfb_resume
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11 #include <linux/clk.h>
12 #include <linux/component.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/list.h>
15 #include <linux/module.h>
16 #include <linux/of_device.h>
17 #include <linux/of_graph.h>
18 #include <linux/of_reserved_mem.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/dma-resv.h>
21 #include <linux/spinlock.h>
22
23 #include <drm/drm_atomic.h>
24 #include <drm/drm_atomic_helper.h>
25 #include <drm/drm_crtc.h>
26 #include <drm/drm_drv.h>
27 #include <drm/drm_fb_cma_helper.h>
28 #include <drm/drm_fb_helper.h>
29 #include <drm/drm_gem_cma_helper.h>
30 #include <drm/drm_gem_framebuffer_helper.h>
31 #include <drm/drm_irq.h>
32 #include <drm/drm_of.h>
33 #include <drm/drm_panel.h>
34 #include <drm/drm_probe_helper.h>
35 #include <drm/drm_simple_kms_helper.h>
36 #include <drm/drm_vblank.h>
37
38 #include "mxsfb_drv.h"
39 #include "mxsfb_regs.h"
40
41 enum mxsfb_devtype {
42 MXSFB_V3,
43 MXSFB_V4,
44 };
45
46 static const struct mxsfb_devdata mxsfb_devdata[] = {
47 [MXSFB_V3] = {
48 .transfer_count = LCDC_V3_TRANSFER_COUNT,
49 .cur_buf = LCDC_V3_CUR_BUF,
50 .next_buf = LCDC_V3_NEXT_BUF,
51 .debug0 = LCDC_V3_DEBUG0,
52 .hs_wdth_mask = 0xff,
53 .hs_wdth_shift = 24,
54 .ipversion = 3,
55 },
56 [MXSFB_V4] = {
57 .transfer_count = LCDC_V4_TRANSFER_COUNT,
58 .cur_buf = LCDC_V4_CUR_BUF,
59 .next_buf = LCDC_V4_NEXT_BUF,
60 .debug0 = LCDC_V4_DEBUG0,
61 .hs_wdth_mask = 0x3fff,
62 .hs_wdth_shift = 18,
63 .ipversion = 4,
64 },
65 };
66
67 static const uint32_t mxsfb_formats[] = {
68 DRM_FORMAT_XRGB8888,
69 DRM_FORMAT_RGB565
70 };
71
72 static struct mxsfb_drm_private *
73 drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
74 {
75 return container_of(pipe, struct mxsfb_drm_private, pipe);
76 }
77
78 void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
79 {
80 if (mxsfb->clk_axi)
81 clk_prepare_enable(mxsfb->clk_axi);
82 }
83
84 void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
85 {
86 if (mxsfb->clk_axi)
87 clk_disable_unprepare(mxsfb->clk_axi);
88 }
89
90 static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
91 .fb_create = drm_gem_fb_create,
92 .atomic_check = drm_atomic_helper_check,
93 .atomic_commit = drm_atomic_helper_commit,
94 };
95
96 static const struct drm_mode_config_helper_funcs mxsfb_mode_config_helpers = {
97 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
98 };
99
100 static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe,
101 struct drm_crtc_state *crtc_state,
102 struct drm_plane_state *plane_state)
103 {
104 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
105 struct drm_device *drm = pipe->plane.dev;
106
107 pm_runtime_get_sync(drm->dev);
108 drm_panel_prepare(mxsfb->panel);
109 mxsfb_crtc_enable(mxsfb);
110 drm_panel_enable(mxsfb->panel);
111 }
112
113 static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)
114 {
115 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
116 struct drm_device *drm = pipe->plane.dev;
117 struct drm_crtc *crtc = &pipe->crtc;
118 struct drm_pending_vblank_event *event;
119
120 drm_panel_disable(mxsfb->panel);
121 mxsfb_crtc_disable(mxsfb);
122 drm_panel_unprepare(mxsfb->panel);
123 pm_runtime_put_sync(drm->dev);
124
125 spin_lock_irq(&drm->event_lock);
126 event = crtc->state->event;
127 if (event) {
128 crtc->state->event = NULL;
129 drm_crtc_send_vblank_event(crtc, event);
130 }
131 spin_unlock_irq(&drm->event_lock);
132 }
133
134 static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,
135 struct drm_plane_state *plane_state)
136 {
137 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
138
139 mxsfb_plane_atomic_update(mxsfb, plane_state);
140 }
141
142 static int mxsfb_pipe_enable_vblank(struct drm_simple_display_pipe *pipe)
143 {
144 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
145
146
147 mxsfb_enable_axi_clk(mxsfb);
148 writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
149 writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
150 mxsfb_disable_axi_clk(mxsfb);
151
152 return 0;
153 }
154
155 static void mxsfb_pipe_disable_vblank(struct drm_simple_display_pipe *pipe)
156 {
157 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
158
159
160 mxsfb_enable_axi_clk(mxsfb);
161 writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
162 writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
163 mxsfb_disable_axi_clk(mxsfb);
164 }
165
166 static struct drm_simple_display_pipe_funcs mxsfb_funcs = {
167 .enable = mxsfb_pipe_enable,
168 .disable = mxsfb_pipe_disable,
169 .update = mxsfb_pipe_update,
170 .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
171 .enable_vblank = mxsfb_pipe_enable_vblank,
172 .disable_vblank = mxsfb_pipe_disable_vblank,
173 };
174
175 static int mxsfb_load(struct drm_device *drm, unsigned long flags)
176 {
177 struct platform_device *pdev = to_platform_device(drm->dev);
178 struct mxsfb_drm_private *mxsfb;
179 struct resource *res;
180 int ret;
181
182 mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
183 if (!mxsfb)
184 return -ENOMEM;
185
186 drm->dev_private = mxsfb;
187 mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data];
188
189 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
190 mxsfb->base = devm_ioremap_resource(drm->dev, res);
191 if (IS_ERR(mxsfb->base))
192 return PTR_ERR(mxsfb->base);
193
194 mxsfb->clk = devm_clk_get(drm->dev, NULL);
195 if (IS_ERR(mxsfb->clk))
196 return PTR_ERR(mxsfb->clk);
197
198 mxsfb->clk_axi = devm_clk_get(drm->dev, "axi");
199 if (IS_ERR(mxsfb->clk_axi))
200 mxsfb->clk_axi = NULL;
201
202 mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
203 if (IS_ERR(mxsfb->clk_disp_axi))
204 mxsfb->clk_disp_axi = NULL;
205
206 ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
207 if (ret)
208 return ret;
209
210 pm_runtime_enable(drm->dev);
211
212 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
213 if (ret < 0) {
214 dev_err(drm->dev, "Failed to initialise vblank\n");
215 goto err_vblank;
216 }
217
218
219 drm_mode_config_init(drm);
220
221 ret = mxsfb_create_output(drm);
222 if (ret < 0) {
223 dev_err(drm->dev, "Failed to create outputs\n");
224 goto err_vblank;
225 }
226
227 ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
228 mxsfb_formats, ARRAY_SIZE(mxsfb_formats), NULL,
229 &mxsfb->connector);
230 if (ret < 0) {
231 dev_err(drm->dev, "Cannot setup simple display pipe\n");
232 goto err_vblank;
233 }
234
235 ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector);
236 if (ret) {
237 dev_err(drm->dev, "Cannot connect panel\n");
238 goto err_vblank;
239 }
240
241 drm->mode_config.min_width = MXSFB_MIN_XRES;
242 drm->mode_config.min_height = MXSFB_MIN_YRES;
243 drm->mode_config.max_width = MXSFB_MAX_XRES;
244 drm->mode_config.max_height = MXSFB_MAX_YRES;
245 drm->mode_config.funcs = &mxsfb_mode_config_funcs;
246 drm->mode_config.helper_private = &mxsfb_mode_config_helpers;
247
248 drm_mode_config_reset(drm);
249
250 pm_runtime_get_sync(drm->dev);
251 ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
252 pm_runtime_put_sync(drm->dev);
253
254 if (ret < 0) {
255 dev_err(drm->dev, "Failed to install IRQ handler\n");
256 goto err_irq;
257 }
258
259 drm_kms_helper_poll_init(drm);
260
261 platform_set_drvdata(pdev, drm);
262
263 drm_helper_hpd_irq_event(drm);
264
265 return 0;
266
267 err_irq:
268 drm_panel_detach(mxsfb->panel);
269 err_vblank:
270 pm_runtime_disable(drm->dev);
271
272 return ret;
273 }
274
275 static void mxsfb_unload(struct drm_device *drm)
276 {
277 drm_kms_helper_poll_fini(drm);
278 drm_mode_config_cleanup(drm);
279
280 pm_runtime_get_sync(drm->dev);
281 drm_irq_uninstall(drm);
282 pm_runtime_put_sync(drm->dev);
283
284 drm->dev_private = NULL;
285
286 pm_runtime_disable(drm->dev);
287 }
288
289 static void mxsfb_irq_preinstall(struct drm_device *drm)
290 {
291 struct mxsfb_drm_private *mxsfb = drm->dev_private;
292
293 mxsfb_pipe_disable_vblank(&mxsfb->pipe);
294 }
295
296 static irqreturn_t mxsfb_irq_handler(int irq, void *data)
297 {
298 struct drm_device *drm = data;
299 struct mxsfb_drm_private *mxsfb = drm->dev_private;
300 u32 reg;
301
302 mxsfb_enable_axi_clk(mxsfb);
303
304 reg = readl(mxsfb->base + LCDC_CTRL1);
305
306 if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
307 drm_crtc_handle_vblank(&mxsfb->pipe.crtc);
308
309 writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
310
311 mxsfb_disable_axi_clk(mxsfb);
312
313 return IRQ_HANDLED;
314 }
315
316 DEFINE_DRM_GEM_CMA_FOPS(fops);
317
318 static struct drm_driver mxsfb_driver = {
319 .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
320 .irq_handler = mxsfb_irq_handler,
321 .irq_preinstall = mxsfb_irq_preinstall,
322 .irq_uninstall = mxsfb_irq_preinstall,
323 .gem_free_object_unlocked = drm_gem_cma_free_object,
324 .gem_vm_ops = &drm_gem_cma_vm_ops,
325 .dumb_create = drm_gem_cma_dumb_create,
326 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
327 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
328 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
329 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
330 .gem_prime_vmap = drm_gem_cma_prime_vmap,
331 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
332 .gem_prime_mmap = drm_gem_cma_prime_mmap,
333 .fops = &fops,
334 .name = "mxsfb-drm",
335 .desc = "MXSFB Controller DRM",
336 .date = "20160824",
337 .major = 1,
338 .minor = 0,
339 };
340
341 static const struct platform_device_id mxsfb_devtype[] = {
342 { .name = "imx23-fb", .driver_data = MXSFB_V3, },
343 { .name = "imx28-fb", .driver_data = MXSFB_V4, },
344 { .name = "imx6sx-fb", .driver_data = MXSFB_V4, },
345 { }
346 };
347 MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
348
349 static const struct of_device_id mxsfb_dt_ids[] = {
350 { .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], },
351 { .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], },
352 { .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], },
353 { }
354 };
355 MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);
356
357 static int mxsfb_probe(struct platform_device *pdev)
358 {
359 struct drm_device *drm;
360 const struct of_device_id *of_id =
361 of_match_device(mxsfb_dt_ids, &pdev->dev);
362 int ret;
363
364 if (!pdev->dev.of_node)
365 return -ENODEV;
366
367 if (of_id)
368 pdev->id_entry = of_id->data;
369
370 drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
371 if (IS_ERR(drm))
372 return PTR_ERR(drm);
373
374 ret = mxsfb_load(drm, 0);
375 if (ret)
376 goto err_free;
377
378 ret = drm_dev_register(drm, 0);
379 if (ret)
380 goto err_unload;
381
382 drm_fbdev_generic_setup(drm, 32);
383
384 return 0;
385
386 err_unload:
387 mxsfb_unload(drm);
388 err_free:
389 drm_dev_put(drm);
390
391 return ret;
392 }
393
394 static int mxsfb_remove(struct platform_device *pdev)
395 {
396 struct drm_device *drm = platform_get_drvdata(pdev);
397
398 drm_dev_unregister(drm);
399 mxsfb_unload(drm);
400 drm_dev_put(drm);
401
402 return 0;
403 }
404
405 #ifdef CONFIG_PM_SLEEP
406 static int mxsfb_suspend(struct device *dev)
407 {
408 struct drm_device *drm = dev_get_drvdata(dev);
409
410 return drm_mode_config_helper_suspend(drm);
411 }
412
413 static int mxsfb_resume(struct device *dev)
414 {
415 struct drm_device *drm = dev_get_drvdata(dev);
416
417 return drm_mode_config_helper_resume(drm);
418 }
419 #endif
420
421 static const struct dev_pm_ops mxsfb_pm_ops = {
422 SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
423 };
424
425 static struct platform_driver mxsfb_platform_driver = {
426 .probe = mxsfb_probe,
427 .remove = mxsfb_remove,
428 .id_table = mxsfb_devtype,
429 .driver = {
430 .name = "mxsfb",
431 .of_match_table = mxsfb_dt_ids,
432 .pm = &mxsfb_pm_ops,
433 },
434 };
435
436 module_platform_driver(mxsfb_platform_driver);
437
438 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
439 MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
440 MODULE_LICENSE("GPL");