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_at91sam9n12_layers[] = {
35 .formats = &atmel_hlcdc_plane_rgb_formats,
38 .type = ATMEL_HLCDC_BASE_LAYER,
48 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9n12 = {
53 .nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9n12_layers),
54 .layers = atmel_hlcdc_at91sam9n12_layers,
57 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_at91sam9x5_layers[] = {
60 .formats = &atmel_hlcdc_plane_rgb_formats,
63 .type = ATMEL_HLCDC_BASE_LAYER,
75 .formats = &atmel_hlcdc_plane_rgb_formats,
78 .type = ATMEL_HLCDC_OVERLAY_LAYER,
92 .name = "high-end-overlay",
93 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
96 .type = ATMEL_HLCDC_OVERLAY_LAYER,
106 .chroma_key_mask = 11,
107 .general_config = 12,
113 .formats = &atmel_hlcdc_plane_rgb_formats,
114 .regs_offset = 0x340,
116 .type = ATMEL_HLCDC_CURSOR_LAYER,
126 .chroma_key_mask = 8,
132 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9x5 = {
137 .nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9x5_layers),
138 .layers = atmel_hlcdc_at91sam9x5_layers,
141 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d3_layers[] = {
144 .formats = &atmel_hlcdc_plane_rgb_formats,
147 .type = ATMEL_HLCDC_BASE_LAYER,
159 .formats = &atmel_hlcdc_plane_rgb_formats,
160 .regs_offset = 0x140,
162 .type = ATMEL_HLCDC_OVERLAY_LAYER,
171 .chroma_key_mask = 8,
177 .formats = &atmel_hlcdc_plane_rgb_formats,
178 .regs_offset = 0x240,
180 .type = ATMEL_HLCDC_OVERLAY_LAYER,
189 .chroma_key_mask = 8,
194 .name = "high-end-overlay",
195 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
196 .regs_offset = 0x340,
198 .type = ATMEL_HLCDC_OVERLAY_LAYER,
208 .chroma_key_mask = 11,
209 .general_config = 12,
215 .formats = &atmel_hlcdc_plane_rgb_formats,
216 .regs_offset = 0x440,
218 .type = ATMEL_HLCDC_CURSOR_LAYER,
229 .chroma_key_mask = 8,
235 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d3 = {
240 .nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d3_layers),
241 .layers = atmel_hlcdc_sama5d3_layers,
244 static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d4_layers[] = {
247 .formats = &atmel_hlcdc_plane_rgb_formats,
250 .type = ATMEL_HLCDC_BASE_LAYER,
262 .formats = &atmel_hlcdc_plane_rgb_formats,
263 .regs_offset = 0x140,
265 .type = ATMEL_HLCDC_OVERLAY_LAYER,
274 .chroma_key_mask = 8,
280 .formats = &atmel_hlcdc_plane_rgb_formats,
281 .regs_offset = 0x240,
283 .type = ATMEL_HLCDC_OVERLAY_LAYER,
292 .chroma_key_mask = 8,
297 .name = "high-end-overlay",
298 .formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
299 .regs_offset = 0x340,
301 .type = ATMEL_HLCDC_OVERLAY_LAYER,
311 .chroma_key_mask = 11,
312 .general_config = 12,
318 static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d4 = {
323 .nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d4_layers),
324 .layers = atmel_hlcdc_sama5d4_layers,
326 static const struct of_device_id atmel_hlcdc_of_match[] = {
328 .compatible = "atmel,at91sam9n12-hlcdc",
329 .data = &atmel_hlcdc_dc_at91sam9n12,
332 .compatible = "atmel,at91sam9x5-hlcdc",
333 .data = &atmel_hlcdc_dc_at91sam9x5,
336 .compatible = "atmel,sama5d2-hlcdc",
337 .data = &atmel_hlcdc_dc_sama5d4,
340 .compatible = "atmel,sama5d3-hlcdc",
341 .data = &atmel_hlcdc_dc_sama5d3,
344 .compatible = "atmel,sama5d4-hlcdc",
345 .data = &atmel_hlcdc_dc_sama5d4,
349 MODULE_DEVICE_TABLE(of, atmel_hlcdc_of_match);
351 int atmel_hlcdc_dc_mode_valid(struct atmel_hlcdc_dc *dc,
352 struct drm_display_mode *mode)
354 int vfront_porch = mode->vsync_start - mode->vdisplay;
355 int vback_porch = mode->vtotal - mode->vsync_end;
356 int vsync_len = mode->vsync_end - mode->vsync_start;
357 int hfront_porch = mode->hsync_start - mode->hdisplay;
358 int hback_porch = mode->htotal - mode->hsync_end;
359 int hsync_len = mode->hsync_end - mode->hsync_start;
361 if (hsync_len > 0x40 || hsync_len < 1)
364 if (vsync_len > 0x40 || vsync_len < 1)
367 if (hfront_porch > 0x200 || hfront_porch < 1 ||
368 hback_porch > 0x200 || hback_porch < 1 ||
370 return MODE_H_ILLEGAL;
372 if (vfront_porch > 0x40 || vfront_porch < 1 ||
373 vback_porch > 0x40 || vback_porch < 0 ||
375 return MODE_V_ILLEGAL;
380 static irqreturn_t atmel_hlcdc_dc_irq_handler(int irq, void *data)
382 struct drm_device *dev = data;
383 struct atmel_hlcdc_dc *dc = dev->dev_private;
384 unsigned long status;
385 unsigned int imr, isr;
388 regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_IMR, &imr);
389 regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
394 if (status & ATMEL_HLCDC_SOF)
395 atmel_hlcdc_crtc_irq(dc->crtc);
397 for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
398 struct atmel_hlcdc_layer *layer = dc->layers[i];
400 if (!(ATMEL_HLCDC_LAYER_STATUS(i) & status) || !layer)
403 atmel_hlcdc_layer_irq(layer);
409 static struct drm_framebuffer *atmel_hlcdc_fb_create(struct drm_device *dev,
410 struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd)
412 return drm_fb_cma_create(dev, file_priv, mode_cmd);
415 static void atmel_hlcdc_fb_output_poll_changed(struct drm_device *dev)
417 struct atmel_hlcdc_dc *dc = dev->dev_private;
420 drm_fbdev_cma_hotplug_event(dc->fbdev);
422 dc->fbdev = drm_fbdev_cma_init(dev, 24,
423 dev->mode_config.num_crtc,
424 dev->mode_config.num_connector);
425 if (IS_ERR(dc->fbdev))
430 static const struct drm_mode_config_funcs mode_config_funcs = {
431 .fb_create = atmel_hlcdc_fb_create,
432 .output_poll_changed = atmel_hlcdc_fb_output_poll_changed,
433 .atomic_check = drm_atomic_helper_check,
434 .atomic_commit = drm_atomic_helper_commit,
437 static int atmel_hlcdc_dc_modeset_init(struct drm_device *dev)
439 struct atmel_hlcdc_dc *dc = dev->dev_private;
440 struct atmel_hlcdc_planes *planes;
444 drm_mode_config_init(dev);
446 ret = atmel_hlcdc_create_outputs(dev);
448 dev_err(dev->dev, "failed to create panel: %d\n", ret);
452 planes = atmel_hlcdc_create_planes(dev);
453 if (IS_ERR(planes)) {
454 dev_err(dev->dev, "failed to create planes\n");
455 return PTR_ERR(planes);
460 dc->layers[planes->primary->layer.desc->id] =
461 &planes->primary->layer;
464 dc->layers[planes->cursor->layer.desc->id] =
465 &planes->cursor->layer;
467 for (i = 0; i < planes->noverlays; i++)
468 dc->layers[planes->overlays[i]->layer.desc->id] =
469 &planes->overlays[i]->layer;
471 ret = atmel_hlcdc_crtc_create(dev);
473 dev_err(dev->dev, "failed to create crtc\n");
477 dev->mode_config.min_width = dc->desc->min_width;
478 dev->mode_config.min_height = dc->desc->min_height;
479 dev->mode_config.max_width = dc->desc->max_width;
480 dev->mode_config.max_height = dc->desc->max_height;
481 dev->mode_config.funcs = &mode_config_funcs;
486 static int atmel_hlcdc_dc_load(struct drm_device *dev)
488 struct platform_device *pdev = to_platform_device(dev->dev);
489 const struct of_device_id *match;
490 struct atmel_hlcdc_dc *dc;
493 match = of_match_node(atmel_hlcdc_of_match, dev->dev->parent->of_node);
495 dev_err(&pdev->dev, "invalid compatible string\n");
500 dev_err(&pdev->dev, "invalid hlcdc description\n");
504 dc = devm_kzalloc(dev->dev, sizeof(*dc), GFP_KERNEL);
508 dc->wq = alloc_ordered_workqueue("atmel-hlcdc-dc", 0);
512 dc->desc = match->data;
513 dc->hlcdc = dev_get_drvdata(dev->dev->parent);
514 dev->dev_private = dc;
516 ret = clk_prepare_enable(dc->hlcdc->periph_clk);
518 dev_err(dev->dev, "failed to enable periph_clk\n");
522 pm_runtime_enable(dev->dev);
524 ret = drm_vblank_init(dev, 1);
526 dev_err(dev->dev, "failed to initialize vblank\n");
527 goto err_periph_clk_disable;
530 ret = atmel_hlcdc_dc_modeset_init(dev);
532 dev_err(dev->dev, "failed to initialize mode setting\n");
533 goto err_periph_clk_disable;
536 drm_mode_config_reset(dev);
538 pm_runtime_get_sync(dev->dev);
539 ret = drm_irq_install(dev, dc->hlcdc->irq);
540 pm_runtime_put_sync(dev->dev);
542 dev_err(dev->dev, "failed to install IRQ handler\n");
543 goto err_periph_clk_disable;
546 platform_set_drvdata(pdev, dev);
548 drm_kms_helper_poll_init(dev);
550 /* force connectors detection */
551 drm_helper_hpd_irq_event(dev);
555 err_periph_clk_disable:
556 pm_runtime_disable(dev->dev);
557 clk_disable_unprepare(dc->hlcdc->periph_clk);
560 destroy_workqueue(dc->wq);
565 static void atmel_hlcdc_dc_unload(struct drm_device *dev)
567 struct atmel_hlcdc_dc *dc = dev->dev_private;
570 drm_fbdev_cma_fini(dc->fbdev);
571 flush_workqueue(dc->wq);
572 drm_kms_helper_poll_fini(dev);
573 drm_mode_config_cleanup(dev);
574 drm_vblank_cleanup(dev);
576 pm_runtime_get_sync(dev->dev);
577 drm_irq_uninstall(dev);
578 pm_runtime_put_sync(dev->dev);
580 dev->dev_private = NULL;
582 pm_runtime_disable(dev->dev);
583 clk_disable_unprepare(dc->hlcdc->periph_clk);
584 destroy_workqueue(dc->wq);
587 static int atmel_hlcdc_dc_connector_plug_all(struct drm_device *dev)
589 struct drm_connector *connector, *failed;
592 mutex_lock(&dev->mode_config.mutex);
593 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
594 ret = drm_connector_register(connector);
600 mutex_unlock(&dev->mode_config.mutex);
604 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
605 if (failed == connector)
608 drm_connector_unregister(connector);
610 mutex_unlock(&dev->mode_config.mutex);
615 static void atmel_hlcdc_dc_connector_unplug_all(struct drm_device *dev)
617 mutex_lock(&dev->mode_config.mutex);
618 drm_connector_unplug_all(dev);
619 mutex_unlock(&dev->mode_config.mutex);
622 static void atmel_hlcdc_dc_lastclose(struct drm_device *dev)
624 struct atmel_hlcdc_dc *dc = dev->dev_private;
626 drm_fbdev_cma_restore_mode(dc->fbdev);
629 static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
631 struct atmel_hlcdc_dc *dc = dev->dev_private;
632 unsigned int cfg = 0;
635 /* Enable interrupts on activated layers */
636 for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
638 cfg |= ATMEL_HLCDC_LAYER_STATUS(i);
641 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, cfg);
646 static void atmel_hlcdc_dc_irq_uninstall(struct drm_device *dev)
648 struct atmel_hlcdc_dc *dc = dev->dev_private;
651 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, 0xffffffff);
652 regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
655 static int atmel_hlcdc_dc_enable_vblank(struct drm_device *dev,
658 struct atmel_hlcdc_dc *dc = dev->dev_private;
660 /* Enable SOF (Start Of Frame) interrupt for vblank counting */
661 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, ATMEL_HLCDC_SOF);
666 static void atmel_hlcdc_dc_disable_vblank(struct drm_device *dev,
669 struct atmel_hlcdc_dc *dc = dev->dev_private;
671 regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, ATMEL_HLCDC_SOF);
674 static const struct file_operations fops = {
675 .owner = THIS_MODULE,
677 .release = drm_release,
678 .unlocked_ioctl = drm_ioctl,
680 .compat_ioctl = drm_compat_ioctl,
685 .mmap = drm_gem_cma_mmap,
688 static struct drm_driver atmel_hlcdc_dc_driver = {
689 .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM |
690 DRIVER_MODESET | DRIVER_PRIME |
692 .lastclose = atmel_hlcdc_dc_lastclose,
693 .irq_handler = atmel_hlcdc_dc_irq_handler,
694 .irq_preinstall = atmel_hlcdc_dc_irq_uninstall,
695 .irq_postinstall = atmel_hlcdc_dc_irq_postinstall,
696 .irq_uninstall = atmel_hlcdc_dc_irq_uninstall,
697 .get_vblank_counter = drm_vblank_no_hw_counter,
698 .enable_vblank = atmel_hlcdc_dc_enable_vblank,
699 .disable_vblank = atmel_hlcdc_dc_disable_vblank,
700 .gem_free_object = drm_gem_cma_free_object,
701 .gem_vm_ops = &drm_gem_cma_vm_ops,
702 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
703 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
704 .gem_prime_import = drm_gem_prime_import,
705 .gem_prime_export = drm_gem_prime_export,
706 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
707 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
708 .gem_prime_vmap = drm_gem_cma_prime_vmap,
709 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
710 .gem_prime_mmap = drm_gem_cma_prime_mmap,
711 .dumb_create = drm_gem_cma_dumb_create,
712 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
713 .dumb_destroy = drm_gem_dumb_destroy,
715 .name = "atmel-hlcdc",
716 .desc = "Atmel HLCD Controller DRM",
722 static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
724 struct drm_device *ddev;
727 ddev = drm_dev_alloc(&atmel_hlcdc_dc_driver, &pdev->dev);
731 ret = atmel_hlcdc_dc_load(ddev);
735 ret = drm_dev_register(ddev, 0);
739 ret = atmel_hlcdc_dc_connector_plug_all(ddev);
746 drm_dev_unregister(ddev);
749 atmel_hlcdc_dc_unload(ddev);
757 static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev)
759 struct drm_device *ddev = platform_get_drvdata(pdev);
761 atmel_hlcdc_dc_connector_unplug_all(ddev);
762 drm_dev_unregister(ddev);
763 atmel_hlcdc_dc_unload(ddev);
769 #ifdef CONFIG_PM_SLEEP
770 static int atmel_hlcdc_dc_drm_suspend(struct device *dev)
772 struct drm_device *drm_dev = dev_get_drvdata(dev);
773 struct drm_crtc *crtc;
775 if (pm_runtime_suspended(dev))
778 drm_modeset_lock_all(drm_dev);
779 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head)
780 atmel_hlcdc_crtc_suspend(crtc);
781 drm_modeset_unlock_all(drm_dev);
785 static int atmel_hlcdc_dc_drm_resume(struct device *dev)
787 struct drm_device *drm_dev = dev_get_drvdata(dev);
788 struct drm_crtc *crtc;
790 if (pm_runtime_suspended(dev))
793 drm_modeset_lock_all(drm_dev);
794 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head)
795 atmel_hlcdc_crtc_resume(crtc);
796 drm_modeset_unlock_all(drm_dev);
801 static SIMPLE_DEV_PM_OPS(atmel_hlcdc_dc_drm_pm_ops,
802 atmel_hlcdc_dc_drm_suspend, atmel_hlcdc_dc_drm_resume);
804 static const struct of_device_id atmel_hlcdc_dc_of_match[] = {
805 { .compatible = "atmel,hlcdc-display-controller" },
809 static struct platform_driver atmel_hlcdc_dc_platform_driver = {
810 .probe = atmel_hlcdc_dc_drm_probe,
811 .remove = atmel_hlcdc_dc_drm_remove,
813 .name = "atmel-hlcdc-display-controller",
814 .pm = &atmel_hlcdc_dc_drm_pm_ops,
815 .of_match_table = atmel_hlcdc_dc_of_match,
818 module_platform_driver(atmel_hlcdc_dc_platform_driver);
820 MODULE_AUTHOR("Jean-Jacques Hiblot <jjhiblot@traphandler.com>");
821 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
822 MODULE_DESCRIPTION("Atmel HLCDC Display Controller DRM Driver");
823 MODULE_LICENSE("GPL");
824 MODULE_ALIAS("platform:atmel-hlcdc-dc");