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19#include <linux/module.h>
20#include <linux/spinlock.h>
21#include <linux/clk.h>
22#include <linux/component.h>
23#include <linux/list.h>
24#include <linux/of_device.h>
25#include <linux/of_graph.h>
26#include <linux/of_reserved_mem.h>
27#include <linux/pm_runtime.h>
28#include <linux/reservation.h>
29
30#include <drm/drmP.h>
31#include <drm/drm_atomic.h>
32#include <drm/drm_atomic_helper.h>
33#include <drm/drm_crtc.h>
34#include <drm/drm_crtc_helper.h>
35#include <drm/drm_fb_helper.h>
36#include <drm/drm_fb_cma_helper.h>
37#include <drm/drm_gem_cma_helper.h>
38#include <drm/drm_gem_framebuffer_helper.h>
39#include <drm/drm_of.h>
40#include <drm/drm_panel.h>
41#include <drm/drm_simple_kms_helper.h>
42
43#include "mxsfb_drv.h"
44#include "mxsfb_regs.h"
45
46enum mxsfb_devtype {
47 MXSFB_V3,
48 MXSFB_V4,
49};
50
51static const struct mxsfb_devdata mxsfb_devdata[] = {
52 [MXSFB_V3] = {
53 .transfer_count = LCDC_V3_TRANSFER_COUNT,
54 .cur_buf = LCDC_V3_CUR_BUF,
55 .next_buf = LCDC_V3_NEXT_BUF,
56 .debug0 = LCDC_V3_DEBUG0,
57 .hs_wdth_mask = 0xff,
58 .hs_wdth_shift = 24,
59 .ipversion = 3,
60 },
61 [MXSFB_V4] = {
62 .transfer_count = LCDC_V4_TRANSFER_COUNT,
63 .cur_buf = LCDC_V4_CUR_BUF,
64 .next_buf = LCDC_V4_NEXT_BUF,
65 .debug0 = LCDC_V4_DEBUG0,
66 .hs_wdth_mask = 0x3fff,
67 .hs_wdth_shift = 18,
68 .ipversion = 4,
69 },
70};
71
72static const uint32_t mxsfb_formats[] = {
73 DRM_FORMAT_XRGB8888,
74 DRM_FORMAT_RGB565
75};
76
77static struct mxsfb_drm_private *
78drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
79{
80 return container_of(pipe, struct mxsfb_drm_private, pipe);
81}
82
83void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
84{
85 if (mxsfb->clk_axi)
86 clk_prepare_enable(mxsfb->clk_axi);
87}
88
89void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
90{
91 if (mxsfb->clk_axi)
92 clk_disable_unprepare(mxsfb->clk_axi);
93}
94
95static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
96 .fb_create = drm_gem_fb_create,
97 .atomic_check = drm_atomic_helper_check,
98 .atomic_commit = drm_atomic_helper_commit,
99};
100
101static const struct drm_mode_config_helper_funcs mxsfb_mode_config_helpers = {
102 .atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
103};
104
105static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe,
106 struct drm_crtc_state *crtc_state,
107 struct drm_plane_state *plane_state)
108{
109 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
110 struct drm_device *drm = pipe->plane.dev;
111
112 pm_runtime_get_sync(drm->dev);
113 drm_panel_prepare(mxsfb->panel);
114 mxsfb_crtc_enable(mxsfb);
115 drm_panel_enable(mxsfb->panel);
116}
117
118static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)
119{
120 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
121 struct drm_device *drm = pipe->plane.dev;
122 struct drm_crtc *crtc = &pipe->crtc;
123 struct drm_pending_vblank_event *event;
124
125 drm_panel_disable(mxsfb->panel);
126 mxsfb_crtc_disable(mxsfb);
127 drm_panel_unprepare(mxsfb->panel);
128 pm_runtime_put_sync(drm->dev);
129
130 spin_lock_irq(&drm->event_lock);
131 event = crtc->state->event;
132 if (event) {
133 crtc->state->event = NULL;
134 drm_crtc_send_vblank_event(crtc, event);
135 }
136 spin_unlock_irq(&drm->event_lock);
137}
138
139static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,
140 struct drm_plane_state *plane_state)
141{
142 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
143
144 mxsfb_plane_atomic_update(mxsfb, plane_state);
145}
146
147static int mxsfb_pipe_enable_vblank(struct drm_simple_display_pipe *pipe)
148{
149 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
150
151
152 mxsfb_enable_axi_clk(mxsfb);
153 writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
154 writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
155 mxsfb_disable_axi_clk(mxsfb);
156
157 return 0;
158}
159
160static void mxsfb_pipe_disable_vblank(struct drm_simple_display_pipe *pipe)
161{
162 struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
163
164
165 mxsfb_enable_axi_clk(mxsfb);
166 writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
167 writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
168 mxsfb_disable_axi_clk(mxsfb);
169}
170
171static struct drm_simple_display_pipe_funcs mxsfb_funcs = {
172 .enable = mxsfb_pipe_enable,
173 .disable = mxsfb_pipe_disable,
174 .update = mxsfb_pipe_update,
175 .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
176 .enable_vblank = mxsfb_pipe_enable_vblank,
177 .disable_vblank = mxsfb_pipe_disable_vblank,
178};
179
180static int mxsfb_load(struct drm_device *drm, unsigned long flags)
181{
182 struct platform_device *pdev = to_platform_device(drm->dev);
183 struct mxsfb_drm_private *mxsfb;
184 struct resource *res;
185 int ret;
186
187 mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
188 if (!mxsfb)
189 return -ENOMEM;
190
191 drm->dev_private = mxsfb;
192 mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data];
193
194 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
195 mxsfb->base = devm_ioremap_resource(drm->dev, res);
196 if (IS_ERR(mxsfb->base))
197 return PTR_ERR(mxsfb->base);
198
199 mxsfb->clk = devm_clk_get(drm->dev, NULL);
200 if (IS_ERR(mxsfb->clk))
201 return PTR_ERR(mxsfb->clk);
202
203 mxsfb->clk_axi = devm_clk_get(drm->dev, "axi");
204 if (IS_ERR(mxsfb->clk_axi))
205 mxsfb->clk_axi = NULL;
206
207 mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
208 if (IS_ERR(mxsfb->clk_disp_axi))
209 mxsfb->clk_disp_axi = NULL;
210
211 ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
212 if (ret)
213 return ret;
214
215 pm_runtime_enable(drm->dev);
216
217 ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
218 if (ret < 0) {
219 dev_err(drm->dev, "Failed to initialise vblank\n");
220 goto err_vblank;
221 }
222
223
224 drm_mode_config_init(drm);
225
226 ret = mxsfb_create_output(drm);
227 if (ret < 0) {
228 dev_err(drm->dev, "Failed to create outputs\n");
229 goto err_vblank;
230 }
231
232 ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
233 mxsfb_formats, ARRAY_SIZE(mxsfb_formats), NULL,
234 &mxsfb->connector);
235 if (ret < 0) {
236 dev_err(drm->dev, "Cannot setup simple display pipe\n");
237 goto err_vblank;
238 }
239
240 ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector);
241 if (ret) {
242 dev_err(drm->dev, "Cannot connect panel\n");
243 goto err_vblank;
244 }
245
246 drm->mode_config.min_width = MXSFB_MIN_XRES;
247 drm->mode_config.min_height = MXSFB_MIN_YRES;
248 drm->mode_config.max_width = MXSFB_MAX_XRES;
249 drm->mode_config.max_height = MXSFB_MAX_YRES;
250 drm->mode_config.funcs = &mxsfb_mode_config_funcs;
251 drm->mode_config.helper_private = &mxsfb_mode_config_helpers;
252
253 drm_mode_config_reset(drm);
254
255 pm_runtime_get_sync(drm->dev);
256 ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
257 pm_runtime_put_sync(drm->dev);
258
259 if (ret < 0) {
260 dev_err(drm->dev, "Failed to install IRQ handler\n");
261 goto err_irq;
262 }
263
264 drm_kms_helper_poll_init(drm);
265
266 mxsfb->fbdev = drm_fbdev_cma_init(drm, 32,
267 drm->mode_config.num_connector);
268 if (IS_ERR(mxsfb->fbdev)) {
269 ret = PTR_ERR(mxsfb->fbdev);
270 mxsfb->fbdev = NULL;
271 dev_err(drm->dev, "Failed to init FB CMA area\n");
272 goto err_cma;
273 }
274
275 platform_set_drvdata(pdev, drm);
276
277 drm_helper_hpd_irq_event(drm);
278
279 return 0;
280
281err_cma:
282 drm_irq_uninstall(drm);
283err_irq:
284 drm_panel_detach(mxsfb->panel);
285err_vblank:
286 pm_runtime_disable(drm->dev);
287
288 return ret;
289}
290
291static void mxsfb_unload(struct drm_device *drm)
292{
293 struct mxsfb_drm_private *mxsfb = drm->dev_private;
294
295 if (mxsfb->fbdev)
296 drm_fbdev_cma_fini(mxsfb->fbdev);
297
298 drm_kms_helper_poll_fini(drm);
299 drm_mode_config_cleanup(drm);
300
301 pm_runtime_get_sync(drm->dev);
302 drm_irq_uninstall(drm);
303 pm_runtime_put_sync(drm->dev);
304
305 drm->dev_private = NULL;
306
307 pm_runtime_disable(drm->dev);
308}
309
310static void mxsfb_lastclose(struct drm_device *drm)
311{
312 struct mxsfb_drm_private *mxsfb = drm->dev_private;
313
314 drm_fbdev_cma_restore_mode(mxsfb->fbdev);
315}
316
317static void mxsfb_irq_preinstall(struct drm_device *drm)
318{
319 struct mxsfb_drm_private *mxsfb = drm->dev_private;
320
321 mxsfb_pipe_disable_vblank(&mxsfb->pipe);
322}
323
324static irqreturn_t mxsfb_irq_handler(int irq, void *data)
325{
326 struct drm_device *drm = data;
327 struct mxsfb_drm_private *mxsfb = drm->dev_private;
328 u32 reg;
329
330 mxsfb_enable_axi_clk(mxsfb);
331
332 reg = readl(mxsfb->base + LCDC_CTRL1);
333
334 if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
335 drm_crtc_handle_vblank(&mxsfb->pipe.crtc);
336
337 writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
338
339 mxsfb_disable_axi_clk(mxsfb);
340
341 return IRQ_HANDLED;
342}
343
344DEFINE_DRM_GEM_CMA_FOPS(fops);
345
346static struct drm_driver mxsfb_driver = {
347 .driver_features = DRIVER_GEM | DRIVER_MODESET |
348 DRIVER_PRIME | DRIVER_ATOMIC |
349 DRIVER_HAVE_IRQ,
350 .lastclose = mxsfb_lastclose,
351 .irq_handler = mxsfb_irq_handler,
352 .irq_preinstall = mxsfb_irq_preinstall,
353 .irq_uninstall = mxsfb_irq_preinstall,
354 .gem_free_object_unlocked = drm_gem_cma_free_object,
355 .gem_vm_ops = &drm_gem_cma_vm_ops,
356 .dumb_create = drm_gem_cma_dumb_create,
357 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
358 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
359 .gem_prime_export = drm_gem_prime_export,
360 .gem_prime_import = drm_gem_prime_import,
361 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
362 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
363 .gem_prime_vmap = drm_gem_cma_prime_vmap,
364 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
365 .gem_prime_mmap = drm_gem_cma_prime_mmap,
366 .fops = &fops,
367 .name = "mxsfb-drm",
368 .desc = "MXSFB Controller DRM",
369 .date = "20160824",
370 .major = 1,
371 .minor = 0,
372};
373
374static const struct platform_device_id mxsfb_devtype[] = {
375 { .name = "imx23-fb", .driver_data = MXSFB_V3, },
376 { .name = "imx28-fb", .driver_data = MXSFB_V4, },
377 { .name = "imx6sx-fb", .driver_data = MXSFB_V4, },
378 { }
379};
380MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
381
382static const struct of_device_id mxsfb_dt_ids[] = {
383 { .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], },
384 { .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], },
385 { .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], },
386 { }
387};
388MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);
389
390static int mxsfb_probe(struct platform_device *pdev)
391{
392 struct drm_device *drm;
393 const struct of_device_id *of_id =
394 of_match_device(mxsfb_dt_ids, &pdev->dev);
395 int ret;
396
397 if (!pdev->dev.of_node)
398 return -ENODEV;
399
400 if (of_id)
401 pdev->id_entry = of_id->data;
402
403 drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
404 if (IS_ERR(drm))
405 return PTR_ERR(drm);
406
407 ret = mxsfb_load(drm, 0);
408 if (ret)
409 goto err_free;
410
411 ret = drm_dev_register(drm, 0);
412 if (ret)
413 goto err_unload;
414
415 return 0;
416
417err_unload:
418 mxsfb_unload(drm);
419err_free:
420 drm_dev_put(drm);
421
422 return ret;
423}
424
425static int mxsfb_remove(struct platform_device *pdev)
426{
427 struct drm_device *drm = platform_get_drvdata(pdev);
428
429 drm_dev_unregister(drm);
430 mxsfb_unload(drm);
431 drm_dev_put(drm);
432
433 return 0;
434}
435
436#ifdef CONFIG_PM_SLEEP
437static int mxsfb_suspend(struct device *dev)
438{
439 struct drm_device *drm = dev_get_drvdata(dev);
440
441 return drm_mode_config_helper_suspend(drm);
442}
443
444static int mxsfb_resume(struct device *dev)
445{
446 struct drm_device *drm = dev_get_drvdata(dev);
447
448 return drm_mode_config_helper_resume(drm);
449}
450#endif
451
452static const struct dev_pm_ops mxsfb_pm_ops = {
453 SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
454};
455
456static struct platform_driver mxsfb_platform_driver = {
457 .probe = mxsfb_probe,
458 .remove = mxsfb_remove,
459 .id_table = mxsfb_devtype,
460 .driver = {
461 .name = "mxsfb",
462 .of_match_table = mxsfb_dt_ids,
463 .pm = &mxsfb_pm_ops,
464 },
465};
466
467module_platform_driver(mxsfb_platform_driver);
468
469MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
470MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
471MODULE_LICENSE("GPL");
472
