2 * Copyright (C) 2014 Traphandler
3 * Copyright (C) 2014 Free Electrons
4 * Copyright (C) 2014 Atmel
6 * Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
7 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published by
11 * the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * You should have received a copy of the GNU General Public License along with
19 * this program. If not, see <http://www.gnu.org/licenses/>.
22 #include <linux/clk.h>
23 #include <linux/irq.h>
24 #include <linux/irqchip.h>
25 #include <linux/module.h>
26 #include <linux/pm_runtime.h>
28 #include "atmel_hlcdc_dc.h"
30 #define ATMEL_HLCDC_LAYER_IRQS_OFFSET 8
32 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d3_layers[] = {
35 .formats = &atmel_hlcdc_plane_rgb_formats,
38 .type = ATMEL_HLCDC_BASE_LAYER,
50 .formats = &atmel_hlcdc_plane_rgb_formats,
53 .type = ATMEL_HLCDC_OVERLAY_LAYER,
68 .formats = &atmel_hlcdc_plane_rgb_formats,
71 .type = ATMEL_HLCDC_OVERLAY_LAYER,
85 .name = "high-end-overlay",
86 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
89 .type = ATMEL_HLCDC_OVERLAY_LAYER,
99 .chroma_key_mask = 11,
100 .general_config = 12,
106 .formats = &atmel_hlcdc_plane_rgb_formats,
107 .regs_offset = 0x440,
109 .type = ATMEL_HLCDC_CURSOR_LAYER,
120 .chroma_key_mask = 8,
126 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d3 = {
131 .nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d3_layers),
132 .layers = atmel_hlcdc_sama5d3_layers,
135 static const struct of_device_id atmel_hlcdc_of_match[] = {
137 .compatible = "atmel,sama5d3-hlcdc",
138 .data = &atmel_hlcdc_dc_sama5d3,
143 int atmel_hlcdc_dc_mode_valid(struct atmel_hlcdc_dc *dc,
144 struct drm_display_mode *mode)
146 int vfront_porch = mode->vsync_start - mode->vdisplay;
147 int vback_porch = mode->vtotal - mode->vsync_end;
148 int vsync_len = mode->vsync_end - mode->vsync_start;
149 int hfront_porch = mode->hsync_start - mode->hdisplay;
150 int hback_porch = mode->htotal - mode->hsync_end;
151 int hsync_len = mode->hsync_end - mode->hsync_start;
153 if (hsync_len > 0x40 || hsync_len < 1)
156 if (vsync_len > 0x40 || vsync_len < 1)
159 if (hfront_porch > 0x200 || hfront_porch < 1 ||
160 hback_porch > 0x200 || hback_porch < 1 ||
162 return MODE_H_ILLEGAL;
164 if (vfront_porch > 0x40 || vfront_porch < 1 ||
165 vback_porch > 0x40 || vback_porch < 0 ||
167 return MODE_V_ILLEGAL;
172 static irqreturn_t atmel_hlcdc_dc_irq_handler(int irq, void *data)
174 struct drm_device *dev = data;
175 struct atmel_hlcdc_dc *dc = dev->dev_private;
176 unsigned long status;
177 unsigned int imr, isr;
180 regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_IMR, &imr);
181 regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
186 if (status & ATMEL_HLCDC_SOF)
187 atmel_hlcdc_crtc_irq(dc->crtc);
189 for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
190 struct atmel_hlcdc_layer *layer = dc->layers[i];
192 if (!(ATMEL_HLCDC_LAYER_STATUS(i) & status) || !layer)
195 atmel_hlcdc_layer_irq(layer);
201 static struct drm_framebuffer *atmel_hlcdc_fb_create(struct drm_device *dev,
202 struct drm_file *file_priv, struct drm_mode_fb_cmd2 *mode_cmd)
204 return drm_fb_cma_create(dev, file_priv, mode_cmd);
207 static void atmel_hlcdc_fb_output_poll_changed(struct drm_device *dev)
209 struct atmel_hlcdc_dc *dc = dev->dev_private;
212 drm_fbdev_cma_hotplug_event(dc->fbdev);
214 dc->fbdev = drm_fbdev_cma_init(dev, 24,
215 dev->mode_config.num_crtc,
216 dev->mode_config.num_connector);
217 if (IS_ERR(dc->fbdev))
222 static const struct drm_mode_config_funcs mode_config_funcs = {
223 .fb_create = atmel_hlcdc_fb_create,
224 .output_poll_changed = atmel_hlcdc_fb_output_poll_changed,
225 .atomic_check = drm_atomic_helper_check,
226 .atomic_commit = drm_atomic_helper_commit,
229 static int atmel_hlcdc_dc_modeset_init(struct drm_device *dev)
231 struct atmel_hlcdc_dc *dc = dev->dev_private;
232 struct atmel_hlcdc_planes *planes;
236 drm_mode_config_init(dev);
238 ret = atmel_hlcdc_create_outputs(dev);
240 dev_err(dev->dev, "failed to create panel: %d\n", ret);
244 planes = atmel_hlcdc_create_planes(dev);
245 if (IS_ERR(planes)) {
246 dev_err(dev->dev, "failed to create planes\n");
247 return PTR_ERR(planes);
252 dc->layers[planes->primary->layer.desc->id] =
253 &planes->primary->layer;
256 dc->layers[planes->cursor->layer.desc->id] =
257 &planes->cursor->layer;
259 for (i = 0; i < planes->noverlays; i++)
260 dc->layers[planes->overlays[i]->layer.desc->id] =
261 &planes->overlays[i]->layer;
263 ret = atmel_hlcdc_crtc_create(dev);
265 dev_err(dev->dev, "failed to create crtc\n");
269 dev->mode_config.min_width = dc->desc->min_width;
270 dev->mode_config.min_height = dc->desc->min_height;
271 dev->mode_config.max_width = dc->desc->max_width;
272 dev->mode_config.max_height = dc->desc->max_height;
273 dev->mode_config.funcs = &mode_config_funcs;
278 static int atmel_hlcdc_dc_load(struct drm_device *dev)
280 struct platform_device *pdev = to_platform_device(dev->dev);
281 const struct of_device_id *match;
282 struct atmel_hlcdc_dc *dc;
285 match = of_match_node(atmel_hlcdc_of_match, dev->dev->parent->of_node);
287 dev_err(&pdev->dev, "invalid compatible string\n");
292 dev_err(&pdev->dev, "invalid hlcdc description\n");
296 dc = devm_kzalloc(dev->dev, sizeof(*dc), GFP_KERNEL);
300 dc->wq = alloc_ordered_workqueue("atmel-hlcdc-dc", 0);
304 dc->desc = match->data;
305 dc->hlcdc = dev_get_drvdata(dev->dev->parent);
306 dev->dev_private = dc;
308 ret = clk_prepare_enable(dc->hlcdc->periph_clk);
310 dev_err(dev->dev, "failed to enable periph_clk\n");
314 pm_runtime_enable(dev->dev);
316 pm_runtime_put_sync(dev->dev);
318 ret = atmel_hlcdc_dc_modeset_init(dev);
320 dev_err(dev->dev, "failed to initialize mode setting\n");
321 goto err_periph_clk_disable;
324 drm_mode_config_reset(dev);
326 ret = drm_vblank_init(dev, 1);
328 dev_err(dev->dev, "failed to initialize vblank\n");
329 goto err_periph_clk_disable;
332 pm_runtime_get_sync(dev->dev);
333 ret = drm_irq_install(dev, dc->hlcdc->irq);
334 pm_runtime_put_sync(dev->dev);
336 dev_err(dev->dev, "failed to install IRQ handler\n");
337 goto err_periph_clk_disable;
340 platform_set_drvdata(pdev, dev);
342 drm_kms_helper_poll_init(dev);
344 /* force connectors detection */
345 drm_helper_hpd_irq_event(dev);
349 err_periph_clk_disable:
350 pm_runtime_disable(dev->dev);
351 clk_disable_unprepare(dc->hlcdc->periph_clk);
354 destroy_workqueue(dc->wq);
359 static void atmel_hlcdc_dc_unload(struct drm_device *dev)
361 struct atmel_hlcdc_dc *dc = dev->dev_private;
364 drm_fbdev_cma_fini(dc->fbdev);
365 flush_workqueue(dc->wq);
366 drm_kms_helper_poll_fini(dev);
367 drm_mode_config_cleanup(dev);
368 drm_vblank_cleanup(dev);
370 pm_runtime_get_sync(dev->dev);
371 drm_irq_uninstall(dev);
372 pm_runtime_put_sync(dev->dev);
374 dev->dev_private = NULL;
376 pm_runtime_disable(dev->dev);
377 clk_disable_unprepare(dc->hlcdc->periph_clk);
378 destroy_workqueue(dc->wq);
381 static int atmel_hlcdc_dc_connector_plug_all(struct drm_device *dev)
383 struct drm_connector *connector, *failed;
386 mutex_lock(&dev->mode_config.mutex);
387 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
388 ret = drm_connector_register(connector);
394 mutex_unlock(&dev->mode_config.mutex);
398 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
399 if (failed == connector)
402 drm_connector_unregister(connector);
404 mutex_unlock(&dev->mode_config.mutex);
409 static void atmel_hlcdc_dc_connector_unplug_all(struct drm_device *dev)
411 mutex_lock(&dev->mode_config.mutex);
412 drm_connector_unplug_all(dev);
413 mutex_unlock(&dev->mode_config.mutex);
416 static void atmel_hlcdc_dc_preclose(struct drm_device *dev,
417 struct drm_file *file)
419 struct drm_crtc *crtc;
421 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
422 atmel_hlcdc_crtc_cancel_page_flip(crtc, file);
425 static void atmel_hlcdc_dc_lastclose(struct drm_device *dev)
427 struct atmel_hlcdc_dc *dc = dev->dev_private;
429 drm_fbdev_cma_restore_mode(dc->fbdev);
432 static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
434 struct atmel_hlcdc_dc *dc = dev->dev_private;
435 unsigned int cfg = 0;
438 /* Enable interrupts on activated layers */
439 for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
441 cfg |= ATMEL_HLCDC_LAYER_STATUS(i);
444 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, cfg);
449 static void atmel_hlcdc_dc_irq_uninstall(struct drm_device *dev)
451 struct atmel_hlcdc_dc *dc = dev->dev_private;
454 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, 0xffffffff);
455 regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
458 static int atmel_hlcdc_dc_enable_vblank(struct drm_device *dev, int crtc)
460 struct atmel_hlcdc_dc *dc = dev->dev_private;
462 /* Enable SOF (Start Of Frame) interrupt for vblank counting */
463 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, ATMEL_HLCDC_SOF);
468 static void atmel_hlcdc_dc_disable_vblank(struct drm_device *dev, int crtc)
470 struct atmel_hlcdc_dc *dc = dev->dev_private;
472 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, ATMEL_HLCDC_SOF);
475 static const struct file_operations fops = {
476 .owner = THIS_MODULE,
478 .release = drm_release,
479 .unlocked_ioctl = drm_ioctl,
481 .compat_ioctl = drm_compat_ioctl,
486 .mmap = drm_gem_cma_mmap,
489 static struct drm_driver atmel_hlcdc_dc_driver = {
490 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET,
491 .preclose = atmel_hlcdc_dc_preclose,
492 .lastclose = atmel_hlcdc_dc_lastclose,
493 .irq_handler = atmel_hlcdc_dc_irq_handler,
494 .irq_preinstall = atmel_hlcdc_dc_irq_uninstall,
495 .irq_postinstall = atmel_hlcdc_dc_irq_postinstall,
496 .irq_uninstall = atmel_hlcdc_dc_irq_uninstall,
497 .get_vblank_counter = drm_vblank_count,
498 .enable_vblank = atmel_hlcdc_dc_enable_vblank,
499 .disable_vblank = atmel_hlcdc_dc_disable_vblank,
500 .gem_free_object = drm_gem_cma_free_object,
501 .gem_vm_ops = &drm_gem_cma_vm_ops,
502 .dumb_create = drm_gem_cma_dumb_create,
503 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
504 .dumb_destroy = drm_gem_dumb_destroy,
506 .name = "atmel-hlcdc",
507 .desc = "Atmel HLCD Controller DRM",
513 static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
515 struct drm_device *ddev;
518 ddev = drm_dev_alloc(&atmel_hlcdc_dc_driver, &pdev->dev);
522 ret = drm_dev_set_unique(ddev, dev_name(ddev->dev));
526 ret = atmel_hlcdc_dc_load(ddev);
530 ret = drm_dev_register(ddev, 0);
534 ret = atmel_hlcdc_dc_connector_plug_all(ddev);
541 drm_dev_unregister(ddev);
544 atmel_hlcdc_dc_unload(ddev);
552 static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev)
554 struct drm_device *ddev = platform_get_drvdata(pdev);
556 atmel_hlcdc_dc_connector_unplug_all(ddev);
557 drm_dev_unregister(ddev);
558 atmel_hlcdc_dc_unload(ddev);
564 static const struct of_device_id atmel_hlcdc_dc_of_match[] = {
565 { .compatible = "atmel,hlcdc-display-controller" },
569 static struct platform_driver atmel_hlcdc_dc_platform_driver = {
570 .probe = atmel_hlcdc_dc_drm_probe,
571 .remove = atmel_hlcdc_dc_drm_remove,
573 .name = "atmel-hlcdc-display-controller",
574 .of_match_table = atmel_hlcdc_dc_of_match,
577 module_platform_driver(atmel_hlcdc_dc_platform_driver);
579 MODULE_AUTHOR("Jean-Jacques Hiblot <jjhiblot@traphandler.com>");
580 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
581 MODULE_DESCRIPTION("Atmel HLCDC Display Controller DRM Driver");
582 MODULE_LICENSE("GPL");
583 MODULE_ALIAS("platform:atmel-hlcdc-dc");