1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2016-2018, 2020-2021 The Linux Foundation. All rights reserved.
4 * Copyright (C) 2013 Red Hat
8 #include <linux/dma-mapping.h>
9 #include <linux/fault-inject.h>
10 #include <linux/debugfs.h>
11 #include <linux/of_address.h>
12 #include <linux/uaccess.h>
14 #include <drm/clients/drm_client_setup.h>
15 #include <drm/drm_drv.h>
16 #include <drm/drm_file.h>
17 #include <drm/drm_ioctl.h>
18 #include <drm/drm_of.h>
21 #include "msm_debugfs.h"
28 * - 1.0.0 - initial interface
29 * - 1.1.0 - adds madvise, and support for submits with > 4 cmd buffers
30 * - 1.2.0 - adds explicit fence support for submit ioctl
31 * - 1.3.0 - adds GMEM_BASE + NR_RINGS params, SUBMITQUEUE_NEW +
32 * SUBMITQUEUE_CLOSE ioctls, and MSM_INFO_IOVA flag for
34 * - 1.4.0 - softpin, MSM_RELOC_BO_DUMP, and GEM_INFO support to set/get
35 * GEM object's debug name
36 * - 1.5.0 - Add SUBMITQUERY_QUERY ioctl
37 * - 1.6.0 - Syncobj support
38 * - 1.7.0 - Add MSM_PARAM_SUSPENDS to access suspend count
39 * - 1.8.0 - Add MSM_BO_CACHED_COHERENT for supported GPUs (a6xx)
40 * - 1.9.0 - Add MSM_SUBMIT_FENCE_SN_IN
41 * - 1.10.0 - Add MSM_SUBMIT_BO_NO_IMPLICIT
42 * - 1.11.0 - Add wait boost (MSM_WAIT_FENCE_BOOST, MSM_PREP_BOOST)
43 * - 1.12.0 - Add MSM_INFO_SET_METADATA and MSM_INFO_GET_METADATA
45 #define MSM_VERSION_MAJOR 1
46 #define MSM_VERSION_MINOR 12
47 #define MSM_VERSION_PATCHLEVEL 0
49 static void msm_deinit_vram(struct drm_device *ddev);
51 static char *vram = "16m";
52 MODULE_PARM_DESC(vram, "Configure VRAM size (for devices without IOMMU/GPUMMU)");
53 module_param(vram, charp, 0);
56 MODULE_PARM_DESC(dumpstate, "Dump KMS state on errors");
57 module_param(dumpstate, bool, 0600);
59 static bool modeset = true;
60 MODULE_PARM_DESC(modeset, "Use kernel modesetting [KMS] (1=on (default), 0=disable)");
61 module_param(modeset, bool, 0600);
63 DECLARE_FAULT_ATTR(fail_gem_alloc);
64 DECLARE_FAULT_ATTR(fail_gem_iova);
66 static int msm_drm_uninit(struct device *dev)
68 struct platform_device *pdev = to_platform_device(dev);
69 struct msm_drm_private *priv = platform_get_drvdata(pdev);
70 struct drm_device *ddev = priv->dev;
73 * Shutdown the hw if we're far enough along where things might be on.
74 * If we run this too early, we'll end up panicking in any variety of
75 * places. Since we don't register the drm device until late in
76 * msm_drm_init, drm_dev->registered is used as an indicator that the
77 * shutdown will be successful.
79 if (ddev->registered) {
80 drm_dev_unregister(ddev);
82 drm_atomic_helper_shutdown(ddev);
85 /* We must cancel and cleanup any pending vblank enable/disable
86 * work before msm_irq_uninstall() to avoid work re-enabling an
87 * irq after uninstall has disabled it.
90 flush_workqueue(priv->wq);
92 msm_gem_shrinker_cleanup(ddev);
94 msm_perf_debugfs_cleanup(priv);
95 msm_rd_debugfs_cleanup(priv);
98 msm_drm_kms_uninit(dev);
100 msm_deinit_vram(ddev);
102 component_unbind_all(dev, ddev);
104 ddev->dev_private = NULL;
107 destroy_workqueue(priv->wq);
112 bool msm_use_mmu(struct drm_device *dev)
114 struct msm_drm_private *priv = dev->dev_private;
117 * a2xx comes with its own MMU
118 * On other platforms IOMMU can be declared specified either for the
119 * MDP/DPU device or for its parent, MDSS device.
121 return priv->is_a2xx ||
122 device_iommu_mapped(dev->dev) ||
123 device_iommu_mapped(dev->dev->parent);
126 static int msm_init_vram(struct drm_device *dev)
128 struct msm_drm_private *priv = dev->dev_private;
129 struct device_node *node;
130 unsigned long size = 0;
133 /* In the device-tree world, we could have a 'memory-region'
134 * phandle, which gives us a link to our "vram". Allocating
135 * is all nicely abstracted behind the dma api, but we need
136 * to know the entire size to allocate it all in one go. There
138 * 1) device with no IOMMU, in which case we need exclusive
139 * access to a VRAM carveout big enough for all gpu
141 * 2) device with IOMMU, but where the bootloader puts up
142 * a splash screen. In this case, the VRAM carveout
143 * need only be large enough for fbdev fb. But we need
144 * exclusive access to the buffer to avoid the kernel
145 * using those pages for other purposes (which appears
146 * as corruption on screen before we have a chance to
147 * load and do initial modeset)
150 node = of_parse_phandle(dev->dev->of_node, "memory-region", 0);
153 ret = of_address_to_resource(node, 0, &r);
157 size = r.end - r.start + 1;
158 DRM_INFO("using VRAM carveout: %lx@%pa\n", size, &r.start);
160 /* if we have no IOMMU, then we need to use carveout allocator.
161 * Grab the entire DMA chunk carved out in early startup in
164 } else if (!msm_use_mmu(dev)) {
165 DRM_INFO("using %s VRAM carveout\n", vram);
166 size = memparse(vram, NULL);
170 unsigned long attrs = 0;
173 priv->vram.size = size;
175 drm_mm_init(&priv->vram.mm, 0, (size >> PAGE_SHIFT) - 1);
176 spin_lock_init(&priv->vram.lock);
178 attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
179 attrs |= DMA_ATTR_WRITE_COMBINE;
181 /* note that for no-kernel-mapping, the vaddr returned
182 * is bogus, but non-null if allocation succeeded:
184 p = dma_alloc_attrs(dev->dev, size,
185 &priv->vram.paddr, GFP_KERNEL, attrs);
187 DRM_DEV_ERROR(dev->dev, "failed to allocate VRAM\n");
188 priv->vram.paddr = 0;
192 DRM_DEV_INFO(dev->dev, "VRAM: %08x->%08x\n",
193 (uint32_t)priv->vram.paddr,
194 (uint32_t)(priv->vram.paddr + size));
200 static void msm_deinit_vram(struct drm_device *ddev)
202 struct msm_drm_private *priv = ddev->dev_private;
203 unsigned long attrs = DMA_ATTR_NO_KERNEL_MAPPING;
205 if (!priv->vram.paddr)
208 drm_mm_takedown(&priv->vram.mm);
209 dma_free_attrs(ddev->dev, priv->vram.size, NULL, priv->vram.paddr,
213 static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
215 struct msm_drm_private *priv = dev_get_drvdata(dev);
216 struct drm_device *ddev;
219 if (drm_firmware_drivers_only())
222 ddev = drm_dev_alloc(drv, dev);
224 DRM_DEV_ERROR(dev, "failed to allocate drm_device\n");
225 return PTR_ERR(ddev);
227 ddev->dev_private = priv;
230 priv->wq = alloc_ordered_workqueue("msm", 0);
236 INIT_LIST_HEAD(&priv->objects);
237 mutex_init(&priv->obj_lock);
240 * Initialize the LRUs:
242 mutex_init(&priv->lru.lock);
243 drm_gem_lru_init(&priv->lru.unbacked, &priv->lru.lock);
244 drm_gem_lru_init(&priv->lru.pinned, &priv->lru.lock);
245 drm_gem_lru_init(&priv->lru.willneed, &priv->lru.lock);
246 drm_gem_lru_init(&priv->lru.dontneed, &priv->lru.lock);
248 /* Teach lockdep about lock ordering wrt. shrinker: */
249 fs_reclaim_acquire(GFP_KERNEL);
250 might_lock(&priv->lru.lock);
251 fs_reclaim_release(GFP_KERNEL);
253 if (priv->kms_init) {
254 ret = drmm_mode_config_init(ddev);
259 ret = msm_init_vram(ddev);
263 dma_set_max_seg_size(dev, UINT_MAX);
265 /* Bind all our sub-components: */
266 ret = component_bind_all(dev, ddev);
268 goto err_deinit_vram;
270 ret = msm_gem_shrinker_init(ddev);
274 if (priv->kms_init) {
275 ret = msm_drm_kms_init(dev, drv);
279 /* valid only for the dummy headless case, where of_node=NULL */
280 WARN_ON(dev->of_node);
281 ddev->driver_features &= ~DRIVER_MODESET;
282 ddev->driver_features &= ~DRIVER_ATOMIC;
285 ret = drm_dev_register(ddev, 0);
289 ret = msm_debugfs_late_init(ddev);
293 if (priv->kms_init) {
294 drm_kms_helper_poll_init(ddev);
295 drm_client_setup(ddev, NULL);
306 msm_deinit_vram(ddev);
308 destroy_workqueue(priv->wq);
319 static void load_gpu(struct drm_device *dev)
321 static DEFINE_MUTEX(init_lock);
322 struct msm_drm_private *priv = dev->dev_private;
324 mutex_lock(&init_lock);
327 priv->gpu = adreno_load_gpu(dev);
329 mutex_unlock(&init_lock);
332 static int context_init(struct drm_device *dev, struct drm_file *file)
334 static atomic_t ident = ATOMIC_INIT(0);
335 struct msm_drm_private *priv = dev->dev_private;
336 struct msm_file_private *ctx;
338 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
342 INIT_LIST_HEAD(&ctx->submitqueues);
343 rwlock_init(&ctx->queuelock);
345 kref_init(&ctx->ref);
346 msm_submitqueue_init(dev, ctx);
348 ctx->aspace = msm_gpu_create_private_address_space(priv->gpu, current);
349 file->driver_priv = ctx;
351 ctx->seqno = atomic_inc_return(&ident);
356 static int msm_open(struct drm_device *dev, struct drm_file *file)
358 /* For now, load gpu on open.. to avoid the requirement of having
359 * firmware in the initrd.
363 return context_init(dev, file);
366 static void context_close(struct msm_file_private *ctx)
368 msm_submitqueue_close(ctx);
369 msm_file_private_put(ctx);
372 static void msm_postclose(struct drm_device *dev, struct drm_file *file)
374 struct msm_drm_private *priv = dev->dev_private;
375 struct msm_file_private *ctx = file->driver_priv;
378 * It is not possible to set sysprof param to non-zero if gpu
379 * is not initialized:
382 msm_file_private_set_sysprof(ctx, priv->gpu, 0);
391 static int msm_ioctl_get_param(struct drm_device *dev, void *data,
392 struct drm_file *file)
394 struct msm_drm_private *priv = dev->dev_private;
395 struct drm_msm_param *args = data;
398 /* for now, we just have 3d pipe.. eventually this would need to
399 * be more clever to dispatch to appropriate gpu module:
401 if ((args->pipe != MSM_PIPE_3D0) || (args->pad != 0))
409 return gpu->funcs->get_param(gpu, file->driver_priv,
410 args->param, &args->value, &args->len);
413 static int msm_ioctl_set_param(struct drm_device *dev, void *data,
414 struct drm_file *file)
416 struct msm_drm_private *priv = dev->dev_private;
417 struct drm_msm_param *args = data;
420 if ((args->pipe != MSM_PIPE_3D0) || (args->pad != 0))
428 return gpu->funcs->set_param(gpu, file->driver_priv,
429 args->param, args->value, args->len);
432 static int msm_ioctl_gem_new(struct drm_device *dev, void *data,
433 struct drm_file *file)
435 struct drm_msm_gem_new *args = data;
436 uint32_t flags = args->flags;
438 if (args->flags & ~MSM_BO_FLAGS) {
439 DRM_ERROR("invalid flags: %08x\n", args->flags);
444 * Uncached CPU mappings are deprecated, as of:
446 * 9ef364432db4 ("drm/msm: deprecate MSM_BO_UNCACHED (map as writecombine instead)")
448 * So promote them to WC.
450 if (flags & MSM_BO_UNCACHED) {
451 flags &= ~MSM_BO_CACHED;
455 if (should_fail(&fail_gem_alloc, args->size))
458 return msm_gem_new_handle(dev, file, args->size,
459 args->flags, &args->handle, NULL);
462 static inline ktime_t to_ktime(struct drm_msm_timespec timeout)
464 return ktime_set(timeout.tv_sec, timeout.tv_nsec);
467 static int msm_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
468 struct drm_file *file)
470 struct drm_msm_gem_cpu_prep *args = data;
471 struct drm_gem_object *obj;
472 ktime_t timeout = to_ktime(args->timeout);
475 if (args->op & ~MSM_PREP_FLAGS) {
476 DRM_ERROR("invalid op: %08x\n", args->op);
480 obj = drm_gem_object_lookup(file, args->handle);
484 ret = msm_gem_cpu_prep(obj, args->op, &timeout);
486 drm_gem_object_put(obj);
491 static int msm_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
492 struct drm_file *file)
494 struct drm_msm_gem_cpu_fini *args = data;
495 struct drm_gem_object *obj;
498 obj = drm_gem_object_lookup(file, args->handle);
502 ret = msm_gem_cpu_fini(obj);
504 drm_gem_object_put(obj);
509 static int msm_ioctl_gem_info_iova(struct drm_device *dev,
510 struct drm_file *file, struct drm_gem_object *obj,
513 struct msm_drm_private *priv = dev->dev_private;
514 struct msm_file_private *ctx = file->driver_priv;
519 if (should_fail(&fail_gem_iova, obj->size))
523 * Don't pin the memory here - just get an address so that userspace can
526 return msm_gem_get_iova(obj, ctx->aspace, iova);
529 static int msm_ioctl_gem_info_set_iova(struct drm_device *dev,
530 struct drm_file *file, struct drm_gem_object *obj,
533 struct msm_drm_private *priv = dev->dev_private;
534 struct msm_file_private *ctx = file->driver_priv;
539 /* Only supported if per-process address space is supported: */
540 if (priv->gpu->aspace == ctx->aspace)
541 return UERR(EOPNOTSUPP, dev, "requires per-process pgtables");
543 if (should_fail(&fail_gem_iova, obj->size))
546 return msm_gem_set_iova(obj, ctx->aspace, iova);
549 static int msm_ioctl_gem_info_set_metadata(struct drm_gem_object *obj,
550 __user void *metadata,
553 struct msm_gem_object *msm_obj = to_msm_bo(obj);
557 /* Impose a moderate upper bound on metadata size: */
558 if (metadata_size > 128) {
562 /* Use a temporary buf to keep copy_from_user() outside of gem obj lock: */
563 buf = memdup_user(metadata, metadata_size);
567 ret = msm_gem_lock_interruptible(obj);
572 krealloc(msm_obj->metadata, metadata_size, GFP_KERNEL);
573 msm_obj->metadata_size = metadata_size;
574 memcpy(msm_obj->metadata, buf, metadata_size);
584 static int msm_ioctl_gem_info_get_metadata(struct drm_gem_object *obj,
585 __user void *metadata,
588 struct msm_gem_object *msm_obj = to_msm_bo(obj);
594 * Querying the size is inherently racey, but
595 * EXT_external_objects expects the app to confirm
596 * via device and driver UUIDs that the exporter and
597 * importer versions match. All we can do from the
598 * kernel side is check the length under obj lock
599 * when userspace tries to retrieve the metadata
601 *metadata_size = msm_obj->metadata_size;
605 ret = msm_gem_lock_interruptible(obj);
609 /* Avoid copy_to_user() under gem obj lock: */
610 len = msm_obj->metadata_size;
611 buf = kmemdup(msm_obj->metadata, len, GFP_KERNEL);
615 if (*metadata_size < len) {
617 } else if (copy_to_user(metadata, buf, len)) {
620 *metadata_size = len;
628 static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
629 struct drm_file *file)
631 struct drm_msm_gem_info *args = data;
632 struct drm_gem_object *obj;
633 struct msm_gem_object *msm_obj;
639 switch (args->info) {
640 case MSM_INFO_GET_OFFSET:
641 case MSM_INFO_GET_IOVA:
642 case MSM_INFO_SET_IOVA:
643 case MSM_INFO_GET_FLAGS:
644 /* value returned as immediate, not pointer, so len==0: */
648 case MSM_INFO_SET_NAME:
649 case MSM_INFO_GET_NAME:
650 case MSM_INFO_SET_METADATA:
651 case MSM_INFO_GET_METADATA:
657 obj = drm_gem_object_lookup(file, args->handle);
661 msm_obj = to_msm_bo(obj);
663 switch (args->info) {
664 case MSM_INFO_GET_OFFSET:
665 args->value = msm_gem_mmap_offset(obj);
667 case MSM_INFO_GET_IOVA:
668 ret = msm_ioctl_gem_info_iova(dev, file, obj, &args->value);
670 case MSM_INFO_SET_IOVA:
671 ret = msm_ioctl_gem_info_set_iova(dev, file, obj, args->value);
673 case MSM_INFO_GET_FLAGS:
674 if (obj->import_attach) {
678 /* Hide internal kernel-only flags: */
679 args->value = to_msm_bo(obj)->flags & MSM_BO_FLAGS;
682 case MSM_INFO_SET_NAME:
683 /* length check should leave room for terminating null: */
684 if (args->len >= sizeof(msm_obj->name)) {
688 if (copy_from_user(msm_obj->name, u64_to_user_ptr(args->value),
690 msm_obj->name[0] = '\0';
694 msm_obj->name[args->len] = '\0';
695 for (i = 0; i < args->len; i++) {
696 if (!isprint(msm_obj->name[i])) {
697 msm_obj->name[i] = '\0';
702 case MSM_INFO_GET_NAME:
703 if (args->value && (args->len < strlen(msm_obj->name))) {
707 args->len = strlen(msm_obj->name);
709 if (copy_to_user(u64_to_user_ptr(args->value),
710 msm_obj->name, args->len))
714 case MSM_INFO_SET_METADATA:
715 ret = msm_ioctl_gem_info_set_metadata(
716 obj, u64_to_user_ptr(args->value), args->len);
718 case MSM_INFO_GET_METADATA:
719 ret = msm_ioctl_gem_info_get_metadata(
720 obj, u64_to_user_ptr(args->value), &args->len);
724 drm_gem_object_put(obj);
729 static int wait_fence(struct msm_gpu_submitqueue *queue, uint32_t fence_id,
730 ktime_t timeout, uint32_t flags)
732 struct dma_fence *fence;
735 if (fence_after(fence_id, queue->last_fence)) {
736 DRM_ERROR_RATELIMITED("waiting on invalid fence: %u (of %u)\n",
737 fence_id, queue->last_fence);
742 * Map submitqueue scoped "seqno" (which is actually an idr key)
743 * back to underlying dma-fence
745 * The fence is removed from the fence_idr when the submit is
746 * retired, so if the fence is not found it means there is nothing
749 spin_lock(&queue->idr_lock);
750 fence = idr_find(&queue->fence_idr, fence_id);
752 fence = dma_fence_get_rcu(fence);
753 spin_unlock(&queue->idr_lock);
758 if (flags & MSM_WAIT_FENCE_BOOST)
759 dma_fence_set_deadline(fence, ktime_get());
761 ret = dma_fence_wait_timeout(fence, true, timeout_to_jiffies(&timeout));
764 } else if (ret != -ERESTARTSYS) {
768 dma_fence_put(fence);
773 static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
774 struct drm_file *file)
776 struct msm_drm_private *priv = dev->dev_private;
777 struct drm_msm_wait_fence *args = data;
778 struct msm_gpu_submitqueue *queue;
781 if (args->flags & ~MSM_WAIT_FENCE_FLAGS) {
782 DRM_ERROR("invalid flags: %08x\n", args->flags);
789 queue = msm_submitqueue_get(file->driver_priv, args->queueid);
793 ret = wait_fence(queue, args->fence, to_ktime(args->timeout), args->flags);
795 msm_submitqueue_put(queue);
800 static int msm_ioctl_gem_madvise(struct drm_device *dev, void *data,
801 struct drm_file *file)
803 struct drm_msm_gem_madvise *args = data;
804 struct drm_gem_object *obj;
807 switch (args->madv) {
808 case MSM_MADV_DONTNEED:
809 case MSM_MADV_WILLNEED:
815 obj = drm_gem_object_lookup(file, args->handle);
820 ret = msm_gem_madvise(obj, args->madv);
822 args->retained = ret;
826 drm_gem_object_put(obj);
832 static int msm_ioctl_submitqueue_new(struct drm_device *dev, void *data,
833 struct drm_file *file)
835 struct drm_msm_submitqueue *args = data;
837 if (args->flags & ~MSM_SUBMITQUEUE_FLAGS)
840 return msm_submitqueue_create(dev, file->driver_priv, args->prio,
841 args->flags, &args->id);
844 static int msm_ioctl_submitqueue_query(struct drm_device *dev, void *data,
845 struct drm_file *file)
847 return msm_submitqueue_query(dev, file->driver_priv, data);
850 static int msm_ioctl_submitqueue_close(struct drm_device *dev, void *data,
851 struct drm_file *file)
853 u32 id = *(u32 *) data;
855 return msm_submitqueue_remove(file->driver_priv, id);
858 static const struct drm_ioctl_desc msm_ioctls[] = {
859 DRM_IOCTL_DEF_DRV(MSM_GET_PARAM, msm_ioctl_get_param, DRM_RENDER_ALLOW),
860 DRM_IOCTL_DEF_DRV(MSM_SET_PARAM, msm_ioctl_set_param, DRM_RENDER_ALLOW),
861 DRM_IOCTL_DEF_DRV(MSM_GEM_NEW, msm_ioctl_gem_new, DRM_RENDER_ALLOW),
862 DRM_IOCTL_DEF_DRV(MSM_GEM_INFO, msm_ioctl_gem_info, DRM_RENDER_ALLOW),
863 DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_PREP, msm_ioctl_gem_cpu_prep, DRM_RENDER_ALLOW),
864 DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_FINI, msm_ioctl_gem_cpu_fini, DRM_RENDER_ALLOW),
865 DRM_IOCTL_DEF_DRV(MSM_GEM_SUBMIT, msm_ioctl_gem_submit, DRM_RENDER_ALLOW),
866 DRM_IOCTL_DEF_DRV(MSM_WAIT_FENCE, msm_ioctl_wait_fence, DRM_RENDER_ALLOW),
867 DRM_IOCTL_DEF_DRV(MSM_GEM_MADVISE, msm_ioctl_gem_madvise, DRM_RENDER_ALLOW),
868 DRM_IOCTL_DEF_DRV(MSM_SUBMITQUEUE_NEW, msm_ioctl_submitqueue_new, DRM_RENDER_ALLOW),
869 DRM_IOCTL_DEF_DRV(MSM_SUBMITQUEUE_CLOSE, msm_ioctl_submitqueue_close, DRM_RENDER_ALLOW),
870 DRM_IOCTL_DEF_DRV(MSM_SUBMITQUEUE_QUERY, msm_ioctl_submitqueue_query, DRM_RENDER_ALLOW),
873 static void msm_show_fdinfo(struct drm_printer *p, struct drm_file *file)
875 struct drm_device *dev = file->minor->dev;
876 struct msm_drm_private *priv = dev->dev_private;
881 msm_gpu_show_fdinfo(priv->gpu, file->driver_priv, p);
883 drm_show_memory_stats(p, file);
886 static const struct file_operations fops = {
887 .owner = THIS_MODULE,
889 .show_fdinfo = drm_show_fdinfo,
892 static const struct drm_driver msm_driver = {
893 .driver_features = DRIVER_GEM |
899 .postclose = msm_postclose,
900 .dumb_create = msm_gem_dumb_create,
901 .dumb_map_offset = msm_gem_dumb_map_offset,
902 .gem_prime_import_sg_table = msm_gem_prime_import_sg_table,
903 #ifdef CONFIG_DEBUG_FS
904 .debugfs_init = msm_debugfs_init,
906 MSM_FBDEV_DRIVER_OPS,
907 .show_fdinfo = msm_show_fdinfo,
908 .ioctls = msm_ioctls,
909 .num_ioctls = ARRAY_SIZE(msm_ioctls),
912 .desc = "MSM Snapdragon DRM",
913 .major = MSM_VERSION_MAJOR,
914 .minor = MSM_VERSION_MINOR,
915 .patchlevel = MSM_VERSION_PATCHLEVEL,
919 * Componentized driver support:
923 * Identify what components need to be added by parsing what remote-endpoints
924 * our MDP output ports are connected to. In the case of LVDS on MDP4, there
925 * is no external component that we need to add since LVDS is within MDP4
928 static int add_components_mdp(struct device *master_dev,
929 struct component_match **matchptr)
931 struct device_node *np = master_dev->of_node;
932 struct device_node *ep_node;
934 for_each_endpoint_of_node(np, ep_node) {
935 struct device_node *intf;
936 struct of_endpoint ep;
939 ret = of_graph_parse_endpoint(ep_node, &ep);
941 DRM_DEV_ERROR(master_dev, "unable to parse port endpoint\n");
942 of_node_put(ep_node);
947 * The LCDC/LVDS port on MDP4 is a speacial case where the
948 * remote-endpoint isn't a component that we need to add
950 if (of_device_is_compatible(np, "qcom,mdp4") &&
955 * It's okay if some of the ports don't have a remote endpoint
956 * specified. It just means that the port isn't connected to
957 * any external interface.
959 intf = of_graph_get_remote_port_parent(ep_node);
963 if (of_device_is_available(intf))
964 drm_of_component_match_add(master_dev, matchptr,
965 component_compare_of, intf);
973 #if !IS_REACHABLE(CONFIG_DRM_MSM_MDP5) || !IS_REACHABLE(CONFIG_DRM_MSM_DPU)
974 bool msm_disp_drv_should_bind(struct device *dev, bool dpu_driver)
976 /* If just a single driver is enabled, use it no matter what */
981 static bool prefer_mdp5 = true;
982 MODULE_PARM_DESC(prefer_mdp5, "Select whether MDP5 or DPU driver should be preferred");
983 module_param(prefer_mdp5, bool, 0444);
985 /* list all platforms supported by both mdp5 and dpu drivers */
986 static const char *const msm_mdp5_dpu_migration[] = {
996 bool msm_disp_drv_should_bind(struct device *dev, bool dpu_driver)
998 /* If it is not an MDP5 device, do not try MDP5 driver */
999 if (!of_device_is_compatible(dev->of_node, "qcom,mdp5"))
1002 /* If it is not in the migration list, use MDP5 */
1003 if (!of_device_compatible_match(dev->of_node, msm_mdp5_dpu_migration))
1006 return prefer_mdp5 ? !dpu_driver : dpu_driver;
1011 * We don't know what's the best binding to link the gpu with the drm device.
1012 * Fow now, we just hunt for all the possible gpus that we support, and add them
1015 static const struct of_device_id msm_gpu_match[] = {
1016 { .compatible = "qcom,adreno" },
1017 { .compatible = "qcom,adreno-3xx" },
1018 { .compatible = "amd,imageon" },
1019 { .compatible = "qcom,kgsl-3d0" },
1023 static int add_gpu_components(struct device *dev,
1024 struct component_match **matchptr)
1026 struct device_node *np;
1028 np = of_find_matching_node(NULL, msm_gpu_match);
1032 if (of_device_is_available(np))
1033 drm_of_component_match_add(dev, matchptr, component_compare_of, np);
1040 static int msm_drm_bind(struct device *dev)
1042 return msm_drm_init(dev, &msm_driver);
1045 static void msm_drm_unbind(struct device *dev)
1047 msm_drm_uninit(dev);
1050 const struct component_master_ops msm_drm_ops = {
1051 .bind = msm_drm_bind,
1052 .unbind = msm_drm_unbind,
1055 int msm_drv_probe(struct device *master_dev,
1056 int (*kms_init)(struct drm_device *dev),
1057 struct msm_kms *kms)
1059 struct msm_drm_private *priv;
1060 struct component_match *match = NULL;
1063 priv = devm_kzalloc(master_dev, sizeof(*priv), GFP_KERNEL);
1068 priv->kms_init = kms_init;
1069 dev_set_drvdata(master_dev, priv);
1071 /* Add mdp components if we have KMS. */
1073 ret = add_components_mdp(master_dev, &match);
1078 ret = add_gpu_components(master_dev, &match);
1082 /* on all devices that I am aware of, iommu's which can map
1083 * any address the cpu can see are used:
1085 ret = dma_set_mask_and_coherent(master_dev, ~0);
1089 ret = component_master_add_with_match(master_dev, &msm_drm_ops, match);
1098 * Used only for headlesss GPU instances
1101 static int msm_pdev_probe(struct platform_device *pdev)
1103 return msm_drv_probe(&pdev->dev, NULL, NULL);
1106 static void msm_pdev_remove(struct platform_device *pdev)
1108 component_master_del(&pdev->dev, &msm_drm_ops);
1111 static struct platform_driver msm_platform_driver = {
1112 .probe = msm_pdev_probe,
1113 .remove = msm_pdev_remove,
1119 static int __init msm_drm_register(void)
1128 msm_hdmi_register();
1131 msm_mdp4_register();
1132 msm_mdss_register();
1133 return platform_driver_register(&msm_platform_driver);
1136 static void __exit msm_drm_unregister(void)
1139 platform_driver_unregister(&msm_platform_driver);
1140 msm_mdss_unregister();
1141 msm_mdp4_unregister();
1142 msm_dp_unregister();
1143 msm_hdmi_unregister();
1144 adreno_unregister();
1145 msm_dsi_unregister();
1146 msm_mdp_unregister();
1147 msm_dpu_unregister();
1150 module_init(msm_drm_register);
1151 module_exit(msm_drm_unregister);
1154 MODULE_DESCRIPTION("MSM DRM Driver");
1155 MODULE_LICENSE("GPL");