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