2 * Copyright (C) 2013 Red Hat
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
18 #include <drm/drm_of.h>
21 #include "msm_debugfs.h"
22 #include "msm_fence.h"
29 * - 1.0.0 - initial interface
30 * - 1.1.0 - adds madvise, and support for submits with > 4 cmd buffers
31 * - 1.2.0 - adds explicit fence support for submit ioctl
33 #define MSM_VERSION_MAJOR 1
34 #define MSM_VERSION_MINOR 2
35 #define MSM_VERSION_PATCHLEVEL 0
37 static void msm_fb_output_poll_changed(struct drm_device *dev)
39 struct msm_drm_private *priv = dev->dev_private;
41 drm_fb_helper_hotplug_event(priv->fbdev);
44 static const struct drm_mode_config_funcs mode_config_funcs = {
45 .fb_create = msm_framebuffer_create,
46 .output_poll_changed = msm_fb_output_poll_changed,
47 .atomic_check = msm_atomic_check,
48 .atomic_commit = msm_atomic_commit,
49 .atomic_state_alloc = msm_atomic_state_alloc,
50 .atomic_state_clear = msm_atomic_state_clear,
51 .atomic_state_free = msm_atomic_state_free,
54 int msm_register_address_space(struct drm_device *dev,
55 struct msm_gem_address_space *aspace)
57 struct msm_drm_private *priv = dev->dev_private;
58 int idx = priv->num_aspaces++;
60 if (WARN_ON(idx >= ARRAY_SIZE(priv->aspace)))
63 priv->aspace[idx] = aspace;
68 #ifdef CONFIG_DRM_MSM_REGISTER_LOGGING
69 static bool reglog = false;
70 MODULE_PARM_DESC(reglog, "Enable register read/write logging");
71 module_param(reglog, bool, 0600);
76 #ifdef CONFIG_DRM_FBDEV_EMULATION
77 static bool fbdev = true;
78 MODULE_PARM_DESC(fbdev, "Enable fbdev compat layer");
79 module_param(fbdev, bool, 0600);
82 static char *vram = "16m";
83 MODULE_PARM_DESC(vram, "Configure VRAM size (for devices without IOMMU/GPUMMU)");
84 module_param(vram, charp, 0);
86 bool dumpstate = false;
87 MODULE_PARM_DESC(dumpstate, "Dump KMS state on errors");
88 module_param(dumpstate, bool, 0600);
94 void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
102 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
104 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
107 dev_err(&pdev->dev, "failed to get memory resource: %s\n", name);
108 return ERR_PTR(-EINVAL);
111 size = resource_size(res);
113 ptr = devm_ioremap_nocache(&pdev->dev, res->start, size);
115 dev_err(&pdev->dev, "failed to ioremap: %s\n", name);
116 return ERR_PTR(-ENOMEM);
120 printk(KERN_DEBUG "IO:region %s %p %08lx\n", dbgname, ptr, size);
125 void msm_writel(u32 data, void __iomem *addr)
128 printk(KERN_DEBUG "IO:W %p %08x\n", addr, data);
132 u32 msm_readl(const void __iomem *addr)
134 u32 val = readl(addr);
136 printk(KERN_ERR "IO:R %p %08x\n", addr, val);
140 struct vblank_event {
141 struct list_head node;
146 static void vblank_ctrl_worker(struct work_struct *work)
148 struct msm_vblank_ctrl *vbl_ctrl = container_of(work,
149 struct msm_vblank_ctrl, work);
150 struct msm_drm_private *priv = container_of(vbl_ctrl,
151 struct msm_drm_private, vblank_ctrl);
152 struct msm_kms *kms = priv->kms;
153 struct vblank_event *vbl_ev, *tmp;
156 spin_lock_irqsave(&vbl_ctrl->lock, flags);
157 list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
158 list_del(&vbl_ev->node);
159 spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
162 kms->funcs->enable_vblank(kms,
163 priv->crtcs[vbl_ev->crtc_id]);
165 kms->funcs->disable_vblank(kms,
166 priv->crtcs[vbl_ev->crtc_id]);
170 spin_lock_irqsave(&vbl_ctrl->lock, flags);
173 spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
176 static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
177 int crtc_id, bool enable)
179 struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
180 struct vblank_event *vbl_ev;
183 vbl_ev = kzalloc(sizeof(*vbl_ev), GFP_ATOMIC);
187 vbl_ev->crtc_id = crtc_id;
188 vbl_ev->enable = enable;
190 spin_lock_irqsave(&vbl_ctrl->lock, flags);
191 list_add_tail(&vbl_ev->node, &vbl_ctrl->event_list);
192 spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
194 queue_work(priv->wq, &vbl_ctrl->work);
199 static int msm_drm_uninit(struct device *dev)
201 struct platform_device *pdev = to_platform_device(dev);
202 struct drm_device *ddev = platform_get_drvdata(pdev);
203 struct msm_drm_private *priv = ddev->dev_private;
204 struct msm_kms *kms = priv->kms;
205 struct msm_gpu *gpu = priv->gpu;
206 struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
207 struct vblank_event *vbl_ev, *tmp;
209 /* We must cancel and cleanup any pending vblank enable/disable
210 * work before drm_irq_uninstall() to avoid work re-enabling an
211 * irq after uninstall has disabled it.
213 cancel_work_sync(&vbl_ctrl->work);
214 list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
215 list_del(&vbl_ev->node);
219 msm_gem_shrinker_cleanup(ddev);
221 drm_kms_helper_poll_fini(ddev);
223 drm_dev_unregister(ddev);
225 #ifdef CONFIG_DRM_FBDEV_EMULATION
226 if (fbdev && priv->fbdev)
227 msm_fbdev_free(ddev);
229 drm_mode_config_cleanup(ddev);
231 pm_runtime_get_sync(dev);
232 drm_irq_uninstall(ddev);
233 pm_runtime_put_sync(dev);
235 flush_workqueue(priv->wq);
236 destroy_workqueue(priv->wq);
238 flush_workqueue(priv->atomic_wq);
239 destroy_workqueue(priv->atomic_wq);
241 if (kms && kms->funcs)
242 kms->funcs->destroy(kms);
245 mutex_lock(&ddev->struct_mutex);
246 gpu->funcs->pm_suspend(gpu);
247 mutex_unlock(&ddev->struct_mutex);
248 gpu->funcs->destroy(gpu);
251 if (priv->vram.paddr) {
252 unsigned long attrs = DMA_ATTR_NO_KERNEL_MAPPING;
253 drm_mm_takedown(&priv->vram.mm);
254 dma_free_attrs(dev, priv->vram.size, NULL,
255 priv->vram.paddr, attrs);
258 component_unbind_all(dev, ddev);
260 msm_mdss_destroy(ddev);
262 ddev->dev_private = NULL;
270 static int get_mdp_ver(struct platform_device *pdev)
272 struct device *dev = &pdev->dev;
274 return (int) (unsigned long) of_device_get_match_data(dev);
277 #include <linux/of_address.h>
279 static int msm_init_vram(struct drm_device *dev)
281 struct msm_drm_private *priv = dev->dev_private;
282 struct device_node *node;
283 unsigned long size = 0;
286 /* In the device-tree world, we could have a 'memory-region'
287 * phandle, which gives us a link to our "vram". Allocating
288 * is all nicely abstracted behind the dma api, but we need
289 * to know the entire size to allocate it all in one go. There
291 * 1) device with no IOMMU, in which case we need exclusive
292 * access to a VRAM carveout big enough for all gpu
294 * 2) device with IOMMU, but where the bootloader puts up
295 * a splash screen. In this case, the VRAM carveout
296 * need only be large enough for fbdev fb. But we need
297 * exclusive access to the buffer to avoid the kernel
298 * using those pages for other purposes (which appears
299 * as corruption on screen before we have a chance to
300 * load and do initial modeset)
303 node = of_parse_phandle(dev->dev->of_node, "memory-region", 0);
306 ret = of_address_to_resource(node, 0, &r);
310 size = r.end - r.start;
311 DRM_INFO("using VRAM carveout: %lx@%pa\n", size, &r.start);
313 /* if we have no IOMMU, then we need to use carveout allocator.
314 * Grab the entire CMA chunk carved out in early startup in
317 } else if (!iommu_present(&platform_bus_type)) {
318 DRM_INFO("using %s VRAM carveout\n", vram);
319 size = memparse(vram, NULL);
323 unsigned long attrs = 0;
326 priv->vram.size = size;
328 drm_mm_init(&priv->vram.mm, 0, (size >> PAGE_SHIFT) - 1);
330 attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
331 attrs |= DMA_ATTR_WRITE_COMBINE;
333 /* note that for no-kernel-mapping, the vaddr returned
334 * is bogus, but non-null if allocation succeeded:
336 p = dma_alloc_attrs(dev->dev, size,
337 &priv->vram.paddr, GFP_KERNEL, attrs);
339 dev_err(dev->dev, "failed to allocate VRAM\n");
340 priv->vram.paddr = 0;
344 dev_info(dev->dev, "VRAM: %08x->%08x\n",
345 (uint32_t)priv->vram.paddr,
346 (uint32_t)(priv->vram.paddr + size));
352 static int msm_drm_init(struct device *dev, struct drm_driver *drv)
354 struct platform_device *pdev = to_platform_device(dev);
355 struct drm_device *ddev;
356 struct msm_drm_private *priv;
360 ddev = drm_dev_alloc(drv, dev);
362 dev_err(dev, "failed to allocate drm_device\n");
363 return PTR_ERR(ddev);
366 platform_set_drvdata(pdev, ddev);
367 ddev->platformdev = pdev;
369 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
375 ddev->dev_private = priv;
378 ret = msm_mdss_init(ddev);
385 priv->wq = alloc_ordered_workqueue("msm", 0);
386 priv->atomic_wq = alloc_ordered_workqueue("msm:atomic", 0);
387 init_waitqueue_head(&priv->pending_crtcs_event);
389 INIT_LIST_HEAD(&priv->inactive_list);
390 INIT_LIST_HEAD(&priv->vblank_ctrl.event_list);
391 INIT_WORK(&priv->vblank_ctrl.work, vblank_ctrl_worker);
392 spin_lock_init(&priv->vblank_ctrl.lock);
394 drm_mode_config_init(ddev);
396 /* Bind all our sub-components: */
397 ret = component_bind_all(dev, ddev);
399 msm_mdss_destroy(ddev);
405 ret = msm_init_vram(ddev);
409 msm_gem_shrinker_init(ddev);
411 switch (get_mdp_ver(pdev)) {
413 kms = mdp4_kms_init(ddev);
417 kms = mdp5_kms_init(ddev);
420 kms = ERR_PTR(-ENODEV);
426 * NOTE: once we have GPU support, having no kms should not
427 * be considered fatal.. ideally we would still support gpu
428 * and (for example) use dmabuf/prime to share buffers with
429 * imx drm driver on iMX5
431 dev_err(dev, "failed to load kms\n");
437 ret = kms->funcs->hw_init(kms);
439 dev_err(dev, "kms hw init failed: %d\n", ret);
444 ddev->mode_config.funcs = &mode_config_funcs;
446 ret = drm_vblank_init(ddev, priv->num_crtcs);
448 dev_err(dev, "failed to initialize vblank\n");
453 pm_runtime_get_sync(dev);
454 ret = drm_irq_install(ddev, kms->irq);
455 pm_runtime_put_sync(dev);
457 dev_err(dev, "failed to install IRQ handler\n");
462 ret = drm_dev_register(ddev, 0);
466 drm_mode_config_reset(ddev);
468 #ifdef CONFIG_DRM_FBDEV_EMULATION
470 priv->fbdev = msm_fbdev_init(ddev);
473 ret = msm_debugfs_late_init(ddev);
477 drm_kms_helper_poll_init(ddev);
490 static void load_gpu(struct drm_device *dev)
492 static DEFINE_MUTEX(init_lock);
493 struct msm_drm_private *priv = dev->dev_private;
495 mutex_lock(&init_lock);
498 priv->gpu = adreno_load_gpu(dev);
500 mutex_unlock(&init_lock);
503 static int msm_open(struct drm_device *dev, struct drm_file *file)
505 struct msm_file_private *ctx;
507 /* For now, load gpu on open.. to avoid the requirement of having
508 * firmware in the initrd.
512 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
516 file->driver_priv = ctx;
521 static void msm_preclose(struct drm_device *dev, struct drm_file *file)
523 struct msm_drm_private *priv = dev->dev_private;
524 struct msm_file_private *ctx = file->driver_priv;
526 mutex_lock(&dev->struct_mutex);
527 if (ctx == priv->lastctx)
528 priv->lastctx = NULL;
529 mutex_unlock(&dev->struct_mutex);
534 static void msm_lastclose(struct drm_device *dev)
536 struct msm_drm_private *priv = dev->dev_private;
538 drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
541 static irqreturn_t msm_irq(int irq, void *arg)
543 struct drm_device *dev = arg;
544 struct msm_drm_private *priv = dev->dev_private;
545 struct msm_kms *kms = priv->kms;
547 return kms->funcs->irq(kms);
550 static void msm_irq_preinstall(struct drm_device *dev)
552 struct msm_drm_private *priv = dev->dev_private;
553 struct msm_kms *kms = priv->kms;
555 kms->funcs->irq_preinstall(kms);
558 static int msm_irq_postinstall(struct drm_device *dev)
560 struct msm_drm_private *priv = dev->dev_private;
561 struct msm_kms *kms = priv->kms;
563 return kms->funcs->irq_postinstall(kms);
566 static void msm_irq_uninstall(struct drm_device *dev)
568 struct msm_drm_private *priv = dev->dev_private;
569 struct msm_kms *kms = priv->kms;
571 kms->funcs->irq_uninstall(kms);
574 static int msm_enable_vblank(struct drm_device *dev, unsigned int pipe)
576 struct msm_drm_private *priv = dev->dev_private;
577 struct msm_kms *kms = priv->kms;
580 DBG("dev=%p, crtc=%u", dev, pipe);
581 return vblank_ctrl_queue_work(priv, pipe, true);
584 static void msm_disable_vblank(struct drm_device *dev, unsigned int pipe)
586 struct msm_drm_private *priv = dev->dev_private;
587 struct msm_kms *kms = priv->kms;
590 DBG("dev=%p, crtc=%u", dev, pipe);
591 vblank_ctrl_queue_work(priv, pipe, false);
598 static int msm_ioctl_get_param(struct drm_device *dev, void *data,
599 struct drm_file *file)
601 struct msm_drm_private *priv = dev->dev_private;
602 struct drm_msm_param *args = data;
605 /* for now, we just have 3d pipe.. eventually this would need to
606 * be more clever to dispatch to appropriate gpu module:
608 if (args->pipe != MSM_PIPE_3D0)
616 return gpu->funcs->get_param(gpu, args->param, &args->value);
619 static int msm_ioctl_gem_new(struct drm_device *dev, void *data,
620 struct drm_file *file)
622 struct drm_msm_gem_new *args = data;
624 if (args->flags & ~MSM_BO_FLAGS) {
625 DRM_ERROR("invalid flags: %08x\n", args->flags);
629 return msm_gem_new_handle(dev, file, args->size,
630 args->flags, &args->handle);
633 static inline ktime_t to_ktime(struct drm_msm_timespec timeout)
635 return ktime_set(timeout.tv_sec, timeout.tv_nsec);
638 static int msm_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
639 struct drm_file *file)
641 struct drm_msm_gem_cpu_prep *args = data;
642 struct drm_gem_object *obj;
643 ktime_t timeout = to_ktime(args->timeout);
646 if (args->op & ~MSM_PREP_FLAGS) {
647 DRM_ERROR("invalid op: %08x\n", args->op);
651 obj = drm_gem_object_lookup(file, args->handle);
655 ret = msm_gem_cpu_prep(obj, args->op, &timeout);
657 drm_gem_object_unreference_unlocked(obj);
662 static int msm_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
663 struct drm_file *file)
665 struct drm_msm_gem_cpu_fini *args = data;
666 struct drm_gem_object *obj;
669 obj = drm_gem_object_lookup(file, args->handle);
673 ret = msm_gem_cpu_fini(obj);
675 drm_gem_object_unreference_unlocked(obj);
680 static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
681 struct drm_file *file)
683 struct drm_msm_gem_info *args = data;
684 struct drm_gem_object *obj;
690 obj = drm_gem_object_lookup(file, args->handle);
694 args->offset = msm_gem_mmap_offset(obj);
696 drm_gem_object_unreference_unlocked(obj);
701 static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
702 struct drm_file *file)
704 struct msm_drm_private *priv = dev->dev_private;
705 struct drm_msm_wait_fence *args = data;
706 ktime_t timeout = to_ktime(args->timeout);
709 DRM_ERROR("invalid pad: %08x\n", args->pad);
716 return msm_wait_fence(priv->gpu->fctx, args->fence, &timeout, true);
719 static int msm_ioctl_gem_madvise(struct drm_device *dev, void *data,
720 struct drm_file *file)
722 struct drm_msm_gem_madvise *args = data;
723 struct drm_gem_object *obj;
726 switch (args->madv) {
727 case MSM_MADV_DONTNEED:
728 case MSM_MADV_WILLNEED:
734 ret = mutex_lock_interruptible(&dev->struct_mutex);
738 obj = drm_gem_object_lookup(file, args->handle);
744 ret = msm_gem_madvise(obj, args->madv);
746 args->retained = ret;
750 drm_gem_object_unreference(obj);
753 mutex_unlock(&dev->struct_mutex);
757 static const struct drm_ioctl_desc msm_ioctls[] = {
758 DRM_IOCTL_DEF_DRV(MSM_GET_PARAM, msm_ioctl_get_param, DRM_AUTH|DRM_RENDER_ALLOW),
759 DRM_IOCTL_DEF_DRV(MSM_GEM_NEW, msm_ioctl_gem_new, DRM_AUTH|DRM_RENDER_ALLOW),
760 DRM_IOCTL_DEF_DRV(MSM_GEM_INFO, msm_ioctl_gem_info, DRM_AUTH|DRM_RENDER_ALLOW),
761 DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_PREP, msm_ioctl_gem_cpu_prep, DRM_AUTH|DRM_RENDER_ALLOW),
762 DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_FINI, msm_ioctl_gem_cpu_fini, DRM_AUTH|DRM_RENDER_ALLOW),
763 DRM_IOCTL_DEF_DRV(MSM_GEM_SUBMIT, msm_ioctl_gem_submit, DRM_AUTH|DRM_RENDER_ALLOW),
764 DRM_IOCTL_DEF_DRV(MSM_WAIT_FENCE, msm_ioctl_wait_fence, DRM_AUTH|DRM_RENDER_ALLOW),
765 DRM_IOCTL_DEF_DRV(MSM_GEM_MADVISE, msm_ioctl_gem_madvise, DRM_AUTH|DRM_RENDER_ALLOW),
768 static const struct vm_operations_struct vm_ops = {
769 .fault = msm_gem_fault,
770 .open = drm_gem_vm_open,
771 .close = drm_gem_vm_close,
774 static const struct file_operations fops = {
775 .owner = THIS_MODULE,
777 .release = drm_release,
778 .unlocked_ioctl = drm_ioctl,
779 .compat_ioctl = drm_compat_ioctl,
783 .mmap = msm_gem_mmap,
786 static struct drm_driver msm_driver = {
787 .driver_features = DRIVER_HAVE_IRQ |
794 .preclose = msm_preclose,
795 .lastclose = msm_lastclose,
796 .irq_handler = msm_irq,
797 .irq_preinstall = msm_irq_preinstall,
798 .irq_postinstall = msm_irq_postinstall,
799 .irq_uninstall = msm_irq_uninstall,
800 .get_vblank_counter = drm_vblank_no_hw_counter,
801 .enable_vblank = msm_enable_vblank,
802 .disable_vblank = msm_disable_vblank,
803 .gem_free_object = msm_gem_free_object,
804 .gem_vm_ops = &vm_ops,
805 .dumb_create = msm_gem_dumb_create,
806 .dumb_map_offset = msm_gem_dumb_map_offset,
807 .dumb_destroy = drm_gem_dumb_destroy,
808 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
809 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
810 .gem_prime_export = drm_gem_prime_export,
811 .gem_prime_import = drm_gem_prime_import,
812 .gem_prime_pin = msm_gem_prime_pin,
813 .gem_prime_unpin = msm_gem_prime_unpin,
814 .gem_prime_get_sg_table = msm_gem_prime_get_sg_table,
815 .gem_prime_import_sg_table = msm_gem_prime_import_sg_table,
816 .gem_prime_vmap = msm_gem_prime_vmap,
817 .gem_prime_vunmap = msm_gem_prime_vunmap,
818 .gem_prime_mmap = msm_gem_prime_mmap,
819 #ifdef CONFIG_DEBUG_FS
820 .debugfs_init = msm_debugfs_init,
821 .debugfs_cleanup = msm_debugfs_cleanup,
823 .ioctls = msm_ioctls,
824 .num_ioctls = DRM_MSM_NUM_IOCTLS,
827 .desc = "MSM Snapdragon DRM",
829 .major = MSM_VERSION_MAJOR,
830 .minor = MSM_VERSION_MINOR,
831 .patchlevel = MSM_VERSION_PATCHLEVEL,
834 #ifdef CONFIG_PM_SLEEP
835 static int msm_pm_suspend(struct device *dev)
837 struct drm_device *ddev = dev_get_drvdata(dev);
839 drm_kms_helper_poll_disable(ddev);
844 static int msm_pm_resume(struct device *dev)
846 struct drm_device *ddev = dev_get_drvdata(dev);
848 drm_kms_helper_poll_enable(ddev);
854 static const struct dev_pm_ops msm_pm_ops = {
855 SET_SYSTEM_SLEEP_PM_OPS(msm_pm_suspend, msm_pm_resume)
859 * Componentized driver support:
863 * NOTE: duplication of the same code as exynos or imx (or probably any other).
864 * so probably some room for some helpers
866 static int compare_of(struct device *dev, void *data)
868 return dev->of_node == data;
872 * Identify what components need to be added by parsing what remote-endpoints
873 * our MDP output ports are connected to. In the case of LVDS on MDP4, there
874 * is no external component that we need to add since LVDS is within MDP4
877 static int add_components_mdp(struct device *mdp_dev,
878 struct component_match **matchptr)
880 struct device_node *np = mdp_dev->of_node;
881 struct device_node *ep_node;
882 struct device *master_dev;
885 * on MDP4 based platforms, the MDP platform device is the component
886 * master that adds other display interface components to itself.
888 * on MDP5 based platforms, the MDSS platform device is the component
889 * master that adds MDP5 and other display interface components to
892 if (of_device_is_compatible(np, "qcom,mdp4"))
893 master_dev = mdp_dev;
895 master_dev = mdp_dev->parent;
897 for_each_endpoint_of_node(np, ep_node) {
898 struct device_node *intf;
899 struct of_endpoint ep;
902 ret = of_graph_parse_endpoint(ep_node, &ep);
904 dev_err(mdp_dev, "unable to parse port endpoint\n");
905 of_node_put(ep_node);
910 * The LCDC/LVDS port on MDP4 is a speacial case where the
911 * remote-endpoint isn't a component that we need to add
913 if (of_device_is_compatible(np, "qcom,mdp4") &&
918 * It's okay if some of the ports don't have a remote endpoint
919 * specified. It just means that the port isn't connected to
920 * any external interface.
922 intf = of_graph_get_remote_port_parent(ep_node);
926 drm_of_component_match_add(master_dev, matchptr, compare_of,
934 static int compare_name_mdp(struct device *dev, void *data)
936 return (strstr(dev_name(dev), "mdp") != NULL);
939 static int add_display_components(struct device *dev,
940 struct component_match **matchptr)
942 struct device *mdp_dev;
946 * MDP5 based devices don't have a flat hierarchy. There is a top level
947 * parent: MDSS, and children: MDP5, DSI, HDMI, eDP etc. Populate the
948 * children devices, find the MDP5 node, and then add the interfaces
949 * to our components list.
951 if (of_device_is_compatible(dev->of_node, "qcom,mdss")) {
952 ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
954 dev_err(dev, "failed to populate children devices\n");
958 mdp_dev = device_find_child(dev, NULL, compare_name_mdp);
960 dev_err(dev, "failed to find MDSS MDP node\n");
961 of_platform_depopulate(dev);
967 /* add the MDP component itself */
968 drm_of_component_match_add(dev, matchptr, compare_of,
975 ret = add_components_mdp(mdp_dev, matchptr);
977 of_platform_depopulate(dev);
983 * We don't know what's the best binding to link the gpu with the drm device.
984 * Fow now, we just hunt for all the possible gpus that we support, and add them
987 static const struct of_device_id msm_gpu_match[] = {
988 { .compatible = "qcom,adreno-3xx" },
989 { .compatible = "qcom,kgsl-3d0" },
993 static int add_gpu_components(struct device *dev,
994 struct component_match **matchptr)
996 struct device_node *np;
998 np = of_find_matching_node(NULL, msm_gpu_match);
1002 drm_of_component_match_add(dev, matchptr, compare_of, np);
1009 static int msm_drm_bind(struct device *dev)
1011 return msm_drm_init(dev, &msm_driver);
1014 static void msm_drm_unbind(struct device *dev)
1016 msm_drm_uninit(dev);
1019 static const struct component_master_ops msm_drm_ops = {
1020 .bind = msm_drm_bind,
1021 .unbind = msm_drm_unbind,
1028 static int msm_pdev_probe(struct platform_device *pdev)
1030 struct component_match *match = NULL;
1033 ret = add_display_components(&pdev->dev, &match);
1037 ret = add_gpu_components(&pdev->dev, &match);
1041 /* on all devices that I am aware of, iommu's which can map
1042 * any address the cpu can see are used:
1044 ret = dma_set_mask_and_coherent(&pdev->dev, ~0);
1048 return component_master_add_with_match(&pdev->dev, &msm_drm_ops, match);
1051 static int msm_pdev_remove(struct platform_device *pdev)
1053 component_master_del(&pdev->dev, &msm_drm_ops);
1054 of_platform_depopulate(&pdev->dev);
1059 static const struct of_device_id dt_match[] = {
1060 { .compatible = "qcom,mdp4", .data = (void *)4 }, /* MDP4 */
1061 { .compatible = "qcom,mdss", .data = (void *)5 }, /* MDP5 MDSS */
1064 MODULE_DEVICE_TABLE(of, dt_match);
1066 static struct platform_driver msm_platform_driver = {
1067 .probe = msm_pdev_probe,
1068 .remove = msm_pdev_remove,
1071 .of_match_table = dt_match,
1076 static int __init msm_drm_register(void)
1082 msm_hdmi_register();
1084 return platform_driver_register(&msm_platform_driver);
1087 static void __exit msm_drm_unregister(void)
1090 platform_driver_unregister(&msm_platform_driver);
1091 msm_hdmi_unregister();
1092 adreno_unregister();
1093 msm_edp_unregister();
1094 msm_dsi_unregister();
1095 msm_mdp_unregister();
1098 module_init(msm_drm_register);
1099 module_exit(msm_drm_unregister);
1102 MODULE_DESCRIPTION("MSM DRM Driver");
1103 MODULE_LICENSE("GPL");