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- /*
- * Copyright (C) 2012 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
- #include <linux/clk.h>
- #include <linux/module.h>
- #include <drm/drmP.h>
- #include <drm/drm_crtc_helper.h>
- #include "armada_crtc.h"
- #include "armada_drm.h"
- #include "armada_gem.h"
- #include "armada_hw.h"
- #include <drm/armada_drm.h>
- #include "armada_ioctlP.h"
- #ifdef CONFIG_DRM_ARMADA_TDA1998X
- #include <drm/i2c/tda998x.h>
- #include "armada_slave.h"
- static struct tda998x_encoder_params params = {
- /* With 0x24, there is no translation between vp_out and int_vp
- FB LCD out Pins VIP Int Vp
- R:23:16 R:7:0 VPC7:0 7:0 7:0[R]
- G:15:8 G:15:8 VPB7:0 23:16 23:16[G]
- B:7:0 B:23:16 VPA7:0 15:8 15:8[B]
- */
- .swap_a = 2,
- .swap_b = 3,
- .swap_c = 4,
- .swap_d = 5,
- .swap_e = 0,
- .swap_f = 1,
- .audio_cfg = BIT(2),
- .audio_frame[1] = 1,
- .audio_format = AFMT_SPDIF,
- .audio_sample_rate = 44100,
- };
- static const struct armada_drm_slave_config tda19988_config = {
- .i2c_adapter_id = 0,
- .crtcs = 1 << 0, /* Only LCD0 at the moment */
- .polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
- .interlace_allowed = true,
- .info = {
- .type = "tda998x",
- .addr = 0x70,
- .platform_data = ¶ms,
- },
- };
- #endif
- static void armada_drm_unref_work(struct work_struct *work)
- {
- struct armada_private *priv =
- container_of(work, struct armada_private, fb_unref_work);
- struct drm_framebuffer *fb;
- while (kfifo_get(&priv->fb_unref, &fb))
- drm_framebuffer_unreference(fb);
- }
- /* Must be called with dev->event_lock held */
- void __armada_drm_queue_unref_work(struct drm_device *dev,
- struct drm_framebuffer *fb)
- {
- struct armada_private *priv = dev->dev_private;
- /*
- * Yes, we really must jump through these hoops just to store a
- * _pointer_ to something into the kfifo. This is utterly insane
- * and idiotic, because it kfifo requires the _data_ pointed to by
- * the pointer const, not the pointer itself. Not only that, but
- * you have to pass a pointer _to_ the pointer you want stored.
- */
- const struct drm_framebuffer *silly_api_alert = fb;
- WARN_ON(!kfifo_put(&priv->fb_unref, &silly_api_alert));
- schedule_work(&priv->fb_unref_work);
- }
- void armada_drm_queue_unref_work(struct drm_device *dev,
- struct drm_framebuffer *fb)
- {
- unsigned long flags;
- spin_lock_irqsave(&dev->event_lock, flags);
- __armada_drm_queue_unref_work(dev, fb);
- spin_unlock_irqrestore(&dev->event_lock, flags);
- }
- static int armada_drm_load(struct drm_device *dev, unsigned long flags)
- {
- const struct platform_device_id *id;
- struct armada_private *priv;
- struct resource *res[ARRAY_SIZE(priv->dcrtc)];
- struct resource *mem = NULL;
- int ret, n, i;
- memset(res, 0, sizeof(res));
- for (n = i = 0; ; n++) {
- struct resource *r = platform_get_resource(dev->platformdev,
- IORESOURCE_MEM, n);
- if (!r)
- break;
- /* Resources above 64K are graphics memory */
- if (resource_size(r) > SZ_64K)
- mem = r;
- else if (i < ARRAY_SIZE(priv->dcrtc))
- res[i++] = r;
- else
- return -EINVAL;
- }
- if (!res[0] || !mem)
- return -ENXIO;
- if (!devm_request_mem_region(dev->dev, mem->start,
- resource_size(mem), "armada-drm"))
- return -EBUSY;
- priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- DRM_ERROR("failed to allocate private\n");
- return -ENOMEM;
- }
- dev->dev_private = priv;
- /* Get the implementation specific driver data. */
- id = platform_get_device_id(dev->platformdev);
- if (!id)
- return -ENXIO;
- priv->variant = (struct armada_variant *)id->driver_data;
- ret = priv->variant->init(priv, dev->dev);
- if (ret)
- return ret;
- INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
- INIT_KFIFO(priv->fb_unref);
- /* Mode setting support */
- drm_mode_config_init(dev);
- dev->mode_config.min_width = 320;
- dev->mode_config.min_height = 200;
- /*
- * With vscale enabled, the maximum width is 1920 due to the
- * 1920 by 3 lines RAM
- */
- dev->mode_config.max_width = 1920;
- dev->mode_config.max_height = 2048;
- dev->mode_config.preferred_depth = 24;
- dev->mode_config.funcs = &armada_drm_mode_config_funcs;
- drm_mm_init(&priv->linear, mem->start, resource_size(mem));
- /* Create all LCD controllers */
- for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
- if (!res[n])
- break;
- ret = armada_drm_crtc_create(dev, n, res[n]);
- if (ret)
- goto err_kms;
- }
- #ifdef CONFIG_DRM_ARMADA_TDA1998X
- ret = armada_drm_connector_slave_create(dev, &tda19988_config);
- if (ret)
- goto err_kms;
- #endif
- ret = drm_vblank_init(dev, n);
- if (ret)
- goto err_kms;
- ret = drm_irq_install(dev);
- if (ret)
- goto err_kms;
- dev->vblank_disable_allowed = 1;
- ret = armada_fbdev_init(dev);
- if (ret)
- goto err_irq;
- drm_kms_helper_poll_init(dev);
- return 0;
- err_irq:
- drm_irq_uninstall(dev);
- err_kms:
- drm_mode_config_cleanup(dev);
- drm_mm_takedown(&priv->linear);
- flush_work(&priv->fb_unref_work);
- return ret;
- }
- static int armada_drm_unload(struct drm_device *dev)
- {
- struct armada_private *priv = dev->dev_private;
- drm_kms_helper_poll_fini(dev);
- armada_fbdev_fini(dev);
- drm_irq_uninstall(dev);
- drm_mode_config_cleanup(dev);
- drm_mm_takedown(&priv->linear);
- flush_work(&priv->fb_unref_work);
- dev->dev_private = NULL;
- return 0;
- }
- void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
- struct armada_vbl_event *evt)
- {
- unsigned long flags;
- spin_lock_irqsave(&dcrtc->irq_lock, flags);
- if (list_empty(&evt->node)) {
- list_add_tail(&evt->node, &dcrtc->vbl_list);
- drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
- }
- spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
- }
- void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
- struct armada_vbl_event *evt)
- {
- if (!list_empty(&evt->node)) {
- list_del_init(&evt->node);
- drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
- }
- }
- void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
- struct armada_vbl_event *evt)
- {
- unsigned long flags;
- spin_lock_irqsave(&dcrtc->irq_lock, flags);
- armada_drm_vbl_event_remove(dcrtc, evt);
- spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
- }
- /* These are called under the vbl_lock. */
- static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
- {
- struct armada_private *priv = dev->dev_private;
- armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
- return 0;
- }
- static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
- {
- struct armada_private *priv = dev->dev_private;
- armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
- }
- static irqreturn_t armada_drm_irq_handler(int irq, void *arg)
- {
- struct drm_device *dev = arg;
- struct armada_private *priv = dev->dev_private;
- struct armada_crtc *dcrtc = priv->dcrtc[0];
- uint32_t v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
- irqreturn_t handled = IRQ_NONE;
- /*
- * This is rediculous - rather than writing bits to clear, we
- * have to set the actual status register value. This is racy.
- */
- writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
- /* Mask out those interrupts we haven't enabled */
- v = stat & dcrtc->irq_ena;
- if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
- armada_drm_crtc_irq(dcrtc, stat);
- handled = IRQ_HANDLED;
- }
- return handled;
- }
- static int armada_drm_irq_postinstall(struct drm_device *dev)
- {
- struct armada_private *priv = dev->dev_private;
- struct armada_crtc *dcrtc = priv->dcrtc[0];
- spin_lock_irq(&dev->vbl_lock);
- writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
- writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
- spin_unlock_irq(&dev->vbl_lock);
- return 0;
- }
- static void armada_drm_irq_uninstall(struct drm_device *dev)
- {
- struct armada_private *priv = dev->dev_private;
- struct armada_crtc *dcrtc = priv->dcrtc[0];
- writel(0, dcrtc->base + LCD_SPU_IRQ_ENA);
- }
- static struct drm_ioctl_desc armada_ioctls[] = {
- DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
- DRM_UNLOCKED),
- DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
- DRM_UNLOCKED),
- DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
- DRM_UNLOCKED),
- };
- static const struct file_operations armada_drm_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = drm_read,
- .poll = drm_poll,
- .unlocked_ioctl = drm_ioctl,
- .mmap = drm_gem_mmap,
- .open = drm_open,
- .release = drm_release,
- };
- static struct drm_driver armada_drm_driver = {
- .load = armada_drm_load,
- .open = NULL,
- .preclose = NULL,
- .postclose = NULL,
- .lastclose = NULL,
- .unload = armada_drm_unload,
- .get_vblank_counter = drm_vblank_count,
- .enable_vblank = armada_drm_enable_vblank,
- .disable_vblank = armada_drm_disable_vblank,
- .irq_handler = armada_drm_irq_handler,
- .irq_postinstall = armada_drm_irq_postinstall,
- .irq_uninstall = armada_drm_irq_uninstall,
- #ifdef CONFIG_DEBUG_FS
- .debugfs_init = armada_drm_debugfs_init,
- .debugfs_cleanup = armada_drm_debugfs_cleanup,
- #endif
- .gem_free_object = armada_gem_free_object,
- .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
- .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
- .gem_prime_export = armada_gem_prime_export,
- .gem_prime_import = armada_gem_prime_import,
- .dumb_create = armada_gem_dumb_create,
- .dumb_map_offset = armada_gem_dumb_map_offset,
- .dumb_destroy = armada_gem_dumb_destroy,
- .gem_vm_ops = &armada_gem_vm_ops,
- .major = 1,
- .minor = 0,
- .name = "armada-drm",
- .desc = "Armada SoC DRM",
- .date = "20120730",
- .driver_features = DRIVER_GEM | DRIVER_MODESET |
- DRIVER_HAVE_IRQ | DRIVER_PRIME,
- .ioctls = armada_ioctls,
- .fops = &armada_drm_fops,
- };
- static int armada_drm_probe(struct platform_device *pdev)
- {
- return drm_platform_init(&armada_drm_driver, pdev);
- }
- static int armada_drm_remove(struct platform_device *pdev)
- {
- drm_platform_exit(&armada_drm_driver, pdev);
- return 0;
- }
- static const struct platform_device_id armada_drm_platform_ids[] = {
- {
- .name = "armada-drm",
- .driver_data = (unsigned long)&armada510_ops,
- }, {
- .name = "armada-510-drm",
- .driver_data = (unsigned long)&armada510_ops,
- },
- { },
- };
- MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
- static struct platform_driver armada_drm_platform_driver = {
- .probe = armada_drm_probe,
- .remove = armada_drm_remove,
- .driver = {
- .name = "armada-drm",
- .owner = THIS_MODULE,
- },
- .id_table = armada_drm_platform_ids,
- };
- static int __init armada_drm_init(void)
- {
- armada_drm_driver.num_ioctls = DRM_ARRAY_SIZE(armada_ioctls);
- return platform_driver_register(&armada_drm_platform_driver);
- }
- module_init(armada_drm_init);
- static void __exit armada_drm_exit(void)
- {
- platform_driver_unregister(&armada_drm_platform_driver);
- }
- module_exit(armada_drm_exit);
- MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
- MODULE_DESCRIPTION("Armada DRM Driver");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:armada-drm");
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