2 * Copyright (C) 2013 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
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 #ifdef CONFIG_DRM_MSM_REGISTER_LOGGING
55 static bool reglog = false;
56 MODULE_PARM_DESC(reglog, "Enable register read/write logging");
57 module_param(reglog, bool, 0600);
62 #ifdef CONFIG_DRM_FBDEV_EMULATION
63 static bool fbdev = true;
64 MODULE_PARM_DESC(fbdev, "Enable fbdev compat layer");
65 module_param(fbdev, bool, 0600);
68 static char *vram = "16m";
69 MODULE_PARM_DESC(vram, "Configure VRAM size (for devices without IOMMU/GPUMMU)");
70 module_param(vram, charp, 0);
72 bool dumpstate = false;
73 MODULE_PARM_DESC(dumpstate, "Dump KMS state on errors");
74 module_param(dumpstate, bool, 0600);
80 struct clk *msm_clk_get(struct platform_device *pdev, const char *name)
85 clk = devm_clk_get(&pdev->dev, name);
86 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
89 snprintf(name2, sizeof(name2), "%s_clk", name);
91 clk = devm_clk_get(&pdev->dev, name2);
93 dev_warn(&pdev->dev, "Using legacy clk name binding. Use "
94 "\"%s\" instead of \"%s\"\n", name, name2);
99 void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
102 struct resource *res;
107 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
109 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
112 dev_err(&pdev->dev, "failed to get memory resource: %s\n", name);
113 return ERR_PTR(-EINVAL);
116 size = resource_size(res);
118 ptr = devm_ioremap_nocache(&pdev->dev, res->start, size);
120 dev_err(&pdev->dev, "failed to ioremap: %s\n", name);
121 return ERR_PTR(-ENOMEM);
125 printk(KERN_DEBUG "IO:region %s %p %08lx\n", dbgname, ptr, size);
130 void msm_writel(u32 data, void __iomem *addr)
133 printk(KERN_DEBUG "IO:W %p %08x\n", addr, data);
137 u32 msm_readl(const void __iomem *addr)
139 u32 val = readl(addr);
141 pr_err("IO:R %p %08x\n", addr, val);
145 struct vblank_event {
146 struct list_head node;
151 static void vblank_ctrl_worker(struct work_struct *work)
153 struct msm_vblank_ctrl *vbl_ctrl = container_of(work,
154 struct msm_vblank_ctrl, work);
155 struct msm_drm_private *priv = container_of(vbl_ctrl,
156 struct msm_drm_private, vblank_ctrl);
157 struct msm_kms *kms = priv->kms;
158 struct vblank_event *vbl_ev, *tmp;
161 spin_lock_irqsave(&vbl_ctrl->lock, flags);
162 list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
163 list_del(&vbl_ev->node);
164 spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
167 kms->funcs->enable_vblank(kms,
168 priv->crtcs[vbl_ev->crtc_id]);
170 kms->funcs->disable_vblank(kms,
171 priv->crtcs[vbl_ev->crtc_id]);
175 spin_lock_irqsave(&vbl_ctrl->lock, flags);
178 spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
181 static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
182 int crtc_id, bool enable)
184 struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
185 struct vblank_event *vbl_ev;
188 vbl_ev = kzalloc(sizeof(*vbl_ev), GFP_ATOMIC);
192 vbl_ev->crtc_id = crtc_id;
193 vbl_ev->enable = enable;
195 spin_lock_irqsave(&vbl_ctrl->lock, flags);
196 list_add_tail(&vbl_ev->node, &vbl_ctrl->event_list);
197 spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
199 queue_work(priv->wq, &vbl_ctrl->work);
204 static int msm_drm_uninit(struct device *dev)
206 struct platform_device *pdev = to_platform_device(dev);
207 struct drm_device *ddev = platform_get_drvdata(pdev);
208 struct msm_drm_private *priv = ddev->dev_private;
209 struct msm_kms *kms = priv->kms;
210 struct msm_gpu *gpu = priv->gpu;
211 struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
212 struct vblank_event *vbl_ev, *tmp;
214 /* We must cancel and cleanup any pending vblank enable/disable
215 * work before drm_irq_uninstall() to avoid work re-enabling an
216 * irq after uninstall has disabled it.
218 cancel_work_sync(&vbl_ctrl->work);
219 list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
220 list_del(&vbl_ev->node);
224 msm_gem_shrinker_cleanup(ddev);
226 drm_kms_helper_poll_fini(ddev);
228 drm_dev_unregister(ddev);
230 msm_perf_debugfs_cleanup(priv);
231 msm_rd_debugfs_cleanup(priv);
233 #ifdef CONFIG_DRM_FBDEV_EMULATION
234 if (fbdev && priv->fbdev)
235 msm_fbdev_free(ddev);
237 drm_mode_config_cleanup(ddev);
239 pm_runtime_get_sync(dev);
240 drm_irq_uninstall(ddev);
241 pm_runtime_put_sync(dev);
243 flush_workqueue(priv->wq);
244 destroy_workqueue(priv->wq);
246 flush_workqueue(priv->atomic_wq);
247 destroy_workqueue(priv->atomic_wq);
249 if (kms && kms->funcs)
250 kms->funcs->destroy(kms);
253 mutex_lock(&ddev->struct_mutex);
254 // XXX what do we do here?
255 //pm_runtime_enable(&pdev->dev);
256 gpu->funcs->pm_suspend(gpu);
257 mutex_unlock(&ddev->struct_mutex);
258 gpu->funcs->destroy(gpu);
261 if (priv->vram.paddr) {
262 unsigned long attrs = DMA_ATTR_NO_KERNEL_MAPPING;
263 drm_mm_takedown(&priv->vram.mm);
264 dma_free_attrs(dev, priv->vram.size, NULL,
265 priv->vram.paddr, attrs);
268 component_unbind_all(dev, ddev);
270 msm_mdss_destroy(ddev);
272 ddev->dev_private = NULL;
280 static int get_mdp_ver(struct platform_device *pdev)
282 struct device *dev = &pdev->dev;
284 return (int) (unsigned long) of_device_get_match_data(dev);
287 #include <linux/of_address.h>
289 static int msm_init_vram(struct drm_device *dev)
291 struct msm_drm_private *priv = dev->dev_private;
292 struct device_node *node;
293 unsigned long size = 0;
296 /* In the device-tree world, we could have a 'memory-region'
297 * phandle, which gives us a link to our "vram". Allocating
298 * is all nicely abstracted behind the dma api, but we need
299 * to know the entire size to allocate it all in one go. There
301 * 1) device with no IOMMU, in which case we need exclusive
302 * access to a VRAM carveout big enough for all gpu
304 * 2) device with IOMMU, but where the bootloader puts up
305 * a splash screen. In this case, the VRAM carveout
306 * need only be large enough for fbdev fb. But we need
307 * exclusive access to the buffer to avoid the kernel
308 * using those pages for other purposes (which appears
309 * as corruption on screen before we have a chance to
310 * load and do initial modeset)
313 node = of_parse_phandle(dev->dev->of_node, "memory-region", 0);
316 ret = of_address_to_resource(node, 0, &r);
320 size = r.end - r.start;
321 DRM_INFO("using VRAM carveout: %lx@%pa\n", size, &r.start);
323 /* if we have no IOMMU, then we need to use carveout allocator.
324 * Grab the entire CMA chunk carved out in early startup in
327 } else if (!iommu_present(&platform_bus_type)) {
328 DRM_INFO("using %s VRAM carveout\n", vram);
329 size = memparse(vram, NULL);
333 unsigned long attrs = 0;
336 priv->vram.size = size;
338 drm_mm_init(&priv->vram.mm, 0, (size >> PAGE_SHIFT) - 1);
339 spin_lock_init(&priv->vram.lock);
341 attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
342 attrs |= DMA_ATTR_WRITE_COMBINE;
344 /* note that for no-kernel-mapping, the vaddr returned
345 * is bogus, but non-null if allocation succeeded:
347 p = dma_alloc_attrs(dev->dev, size,
348 &priv->vram.paddr, GFP_KERNEL, attrs);
350 dev_err(dev->dev, "failed to allocate VRAM\n");
351 priv->vram.paddr = 0;
355 dev_info(dev->dev, "VRAM: %08x->%08x\n",
356 (uint32_t)priv->vram.paddr,
357 (uint32_t)(priv->vram.paddr + size));
363 static int msm_drm_init(struct device *dev, struct drm_driver *drv)
365 struct platform_device *pdev = to_platform_device(dev);
366 struct drm_device *ddev;
367 struct msm_drm_private *priv;
371 ddev = drm_dev_alloc(drv, dev);
373 dev_err(dev, "failed to allocate drm_device\n");
374 return PTR_ERR(ddev);
377 platform_set_drvdata(pdev, ddev);
379 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
385 ddev->dev_private = priv;
388 ret = msm_mdss_init(ddev);
395 priv->wq = alloc_ordered_workqueue("msm", 0);
396 priv->atomic_wq = alloc_ordered_workqueue("msm:atomic", 0);
397 init_waitqueue_head(&priv->pending_crtcs_event);
399 INIT_LIST_HEAD(&priv->inactive_list);
400 INIT_LIST_HEAD(&priv->vblank_ctrl.event_list);
401 INIT_WORK(&priv->vblank_ctrl.work, vblank_ctrl_worker);
402 spin_lock_init(&priv->vblank_ctrl.lock);
404 drm_mode_config_init(ddev);
406 /* Bind all our sub-components: */
407 ret = component_bind_all(dev, ddev);
409 msm_mdss_destroy(ddev);
415 ret = msm_init_vram(ddev);
419 msm_gem_shrinker_init(ddev);
421 switch (get_mdp_ver(pdev)) {
423 kms = mdp4_kms_init(ddev);
427 kms = mdp5_kms_init(ddev);
430 kms = ERR_PTR(-ENODEV);
436 * NOTE: once we have GPU support, having no kms should not
437 * be considered fatal.. ideally we would still support gpu
438 * and (for example) use dmabuf/prime to share buffers with
439 * imx drm driver on iMX5
441 dev_err(dev, "failed to load kms\n");
447 ret = kms->funcs->hw_init(kms);
449 dev_err(dev, "kms hw init failed: %d\n", ret);
454 ddev->mode_config.funcs = &mode_config_funcs;
456 ret = drm_vblank_init(ddev, priv->num_crtcs);
458 dev_err(dev, "failed to initialize vblank\n");
463 pm_runtime_get_sync(dev);
464 ret = drm_irq_install(ddev, kms->irq);
465 pm_runtime_put_sync(dev);
467 dev_err(dev, "failed to install IRQ handler\n");
472 ret = drm_dev_register(ddev, 0);
476 drm_mode_config_reset(ddev);
478 #ifdef CONFIG_DRM_FBDEV_EMULATION
480 priv->fbdev = msm_fbdev_init(ddev);
483 ret = msm_debugfs_late_init(ddev);
487 drm_kms_helper_poll_init(ddev);
500 static void load_gpu(struct drm_device *dev)
502 static DEFINE_MUTEX(init_lock);
503 struct msm_drm_private *priv = dev->dev_private;
505 mutex_lock(&init_lock);
508 priv->gpu = adreno_load_gpu(dev);
510 mutex_unlock(&init_lock);
513 static int msm_open(struct drm_device *dev, struct drm_file *file)
515 struct msm_file_private *ctx;
517 /* For now, load gpu on open.. to avoid the requirement of having
518 * firmware in the initrd.
522 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
526 file->driver_priv = ctx;
531 static void msm_postclose(struct drm_device *dev, struct drm_file *file)
533 struct msm_drm_private *priv = dev->dev_private;
534 struct msm_file_private *ctx = file->driver_priv;
536 mutex_lock(&dev->struct_mutex);
537 if (ctx == priv->lastctx)
538 priv->lastctx = NULL;
539 mutex_unlock(&dev->struct_mutex);
544 static void msm_lastclose(struct drm_device *dev)
546 struct msm_drm_private *priv = dev->dev_private;
548 drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
551 static irqreturn_t msm_irq(int irq, void *arg)
553 struct drm_device *dev = arg;
554 struct msm_drm_private *priv = dev->dev_private;
555 struct msm_kms *kms = priv->kms;
557 return kms->funcs->irq(kms);
560 static void msm_irq_preinstall(struct drm_device *dev)
562 struct msm_drm_private *priv = dev->dev_private;
563 struct msm_kms *kms = priv->kms;
565 kms->funcs->irq_preinstall(kms);
568 static int msm_irq_postinstall(struct drm_device *dev)
570 struct msm_drm_private *priv = dev->dev_private;
571 struct msm_kms *kms = priv->kms;
573 return kms->funcs->irq_postinstall(kms);
576 static void msm_irq_uninstall(struct drm_device *dev)
578 struct msm_drm_private *priv = dev->dev_private;
579 struct msm_kms *kms = priv->kms;
581 kms->funcs->irq_uninstall(kms);
584 static int msm_enable_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 return vblank_ctrl_queue_work(priv, pipe, true);
594 static void msm_disable_vblank(struct drm_device *dev, unsigned int pipe)
596 struct msm_drm_private *priv = dev->dev_private;
597 struct msm_kms *kms = priv->kms;
600 DBG("dev=%p, crtc=%u", dev, pipe);
601 vblank_ctrl_queue_work(priv, pipe, false);
608 static int msm_ioctl_get_param(struct drm_device *dev, void *data,
609 struct drm_file *file)
611 struct msm_drm_private *priv = dev->dev_private;
612 struct drm_msm_param *args = data;
615 /* for now, we just have 3d pipe.. eventually this would need to
616 * be more clever to dispatch to appropriate gpu module:
618 if (args->pipe != MSM_PIPE_3D0)
626 return gpu->funcs->get_param(gpu, args->param, &args->value);
629 static int msm_ioctl_gem_new(struct drm_device *dev, void *data,
630 struct drm_file *file)
632 struct drm_msm_gem_new *args = data;
634 if (args->flags & ~MSM_BO_FLAGS) {
635 DRM_ERROR("invalid flags: %08x\n", args->flags);
639 return msm_gem_new_handle(dev, file, args->size,
640 args->flags, &args->handle);
643 static inline ktime_t to_ktime(struct drm_msm_timespec timeout)
645 return ktime_set(timeout.tv_sec, timeout.tv_nsec);
648 static int msm_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
649 struct drm_file *file)
651 struct drm_msm_gem_cpu_prep *args = data;
652 struct drm_gem_object *obj;
653 ktime_t timeout = to_ktime(args->timeout);
656 if (args->op & ~MSM_PREP_FLAGS) {
657 DRM_ERROR("invalid op: %08x\n", args->op);
661 obj = drm_gem_object_lookup(file, args->handle);
665 ret = msm_gem_cpu_prep(obj, args->op, &timeout);
667 drm_gem_object_unreference_unlocked(obj);
672 static int msm_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
673 struct drm_file *file)
675 struct drm_msm_gem_cpu_fini *args = data;
676 struct drm_gem_object *obj;
679 obj = drm_gem_object_lookup(file, args->handle);
683 ret = msm_gem_cpu_fini(obj);
685 drm_gem_object_unreference_unlocked(obj);
690 static int msm_ioctl_gem_info_iova(struct drm_device *dev,
691 struct drm_gem_object *obj, uint64_t *iova)
693 struct msm_drm_private *priv = dev->dev_private;
698 return msm_gem_get_iova(obj, priv->gpu->aspace, iova);
701 static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
702 struct drm_file *file)
704 struct drm_msm_gem_info *args = data;
705 struct drm_gem_object *obj;
708 if (args->flags & ~MSM_INFO_FLAGS)
711 obj = drm_gem_object_lookup(file, args->handle);
715 if (args->flags & MSM_INFO_IOVA) {
718 ret = msm_ioctl_gem_info_iova(dev, obj, &iova);
722 args->offset = msm_gem_mmap_offset(obj);
725 drm_gem_object_unreference_unlocked(obj);
730 static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
731 struct drm_file *file)
733 struct msm_drm_private *priv = dev->dev_private;
734 struct drm_msm_wait_fence *args = data;
735 ktime_t timeout = to_ktime(args->timeout);
738 DRM_ERROR("invalid pad: %08x\n", args->pad);
745 return msm_wait_fence(priv->gpu->fctx, args->fence, &timeout, true);
748 static int msm_ioctl_gem_madvise(struct drm_device *dev, void *data,
749 struct drm_file *file)
751 struct drm_msm_gem_madvise *args = data;
752 struct drm_gem_object *obj;
755 switch (args->madv) {
756 case MSM_MADV_DONTNEED:
757 case MSM_MADV_WILLNEED:
763 ret = mutex_lock_interruptible(&dev->struct_mutex);
767 obj = drm_gem_object_lookup(file, args->handle);
773 ret = msm_gem_madvise(obj, args->madv);
775 args->retained = ret;
779 drm_gem_object_unreference(obj);
782 mutex_unlock(&dev->struct_mutex);
786 static const struct drm_ioctl_desc msm_ioctls[] = {
787 DRM_IOCTL_DEF_DRV(MSM_GET_PARAM, msm_ioctl_get_param, DRM_AUTH|DRM_RENDER_ALLOW),
788 DRM_IOCTL_DEF_DRV(MSM_GEM_NEW, msm_ioctl_gem_new, DRM_AUTH|DRM_RENDER_ALLOW),
789 DRM_IOCTL_DEF_DRV(MSM_GEM_INFO, msm_ioctl_gem_info, DRM_AUTH|DRM_RENDER_ALLOW),
790 DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_PREP, msm_ioctl_gem_cpu_prep, DRM_AUTH|DRM_RENDER_ALLOW),
791 DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_FINI, msm_ioctl_gem_cpu_fini, DRM_AUTH|DRM_RENDER_ALLOW),
792 DRM_IOCTL_DEF_DRV(MSM_GEM_SUBMIT, msm_ioctl_gem_submit, DRM_AUTH|DRM_RENDER_ALLOW),
793 DRM_IOCTL_DEF_DRV(MSM_WAIT_FENCE, msm_ioctl_wait_fence, DRM_AUTH|DRM_RENDER_ALLOW),
794 DRM_IOCTL_DEF_DRV(MSM_GEM_MADVISE, msm_ioctl_gem_madvise, DRM_AUTH|DRM_RENDER_ALLOW),
797 static const struct vm_operations_struct vm_ops = {
798 .fault = msm_gem_fault,
799 .open = drm_gem_vm_open,
800 .close = drm_gem_vm_close,
803 static const struct file_operations fops = {
804 .owner = THIS_MODULE,
806 .release = drm_release,
807 .unlocked_ioctl = drm_ioctl,
808 .compat_ioctl = drm_compat_ioctl,
812 .mmap = msm_gem_mmap,
815 static struct drm_driver msm_driver = {
816 .driver_features = DRIVER_HAVE_IRQ |
823 .postclose = msm_postclose,
824 .lastclose = msm_lastclose,
825 .irq_handler = msm_irq,
826 .irq_preinstall = msm_irq_preinstall,
827 .irq_postinstall = msm_irq_postinstall,
828 .irq_uninstall = msm_irq_uninstall,
829 .enable_vblank = msm_enable_vblank,
830 .disable_vblank = msm_disable_vblank,
831 .gem_free_object = msm_gem_free_object,
832 .gem_vm_ops = &vm_ops,
833 .dumb_create = msm_gem_dumb_create,
834 .dumb_map_offset = msm_gem_dumb_map_offset,
835 .dumb_destroy = drm_gem_dumb_destroy,
836 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
837 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
838 .gem_prime_export = drm_gem_prime_export,
839 .gem_prime_import = drm_gem_prime_import,
840 .gem_prime_res_obj = msm_gem_prime_res_obj,
841 .gem_prime_pin = msm_gem_prime_pin,
842 .gem_prime_unpin = msm_gem_prime_unpin,
843 .gem_prime_get_sg_table = msm_gem_prime_get_sg_table,
844 .gem_prime_import_sg_table = msm_gem_prime_import_sg_table,
845 .gem_prime_vmap = msm_gem_prime_vmap,
846 .gem_prime_vunmap = msm_gem_prime_vunmap,
847 .gem_prime_mmap = msm_gem_prime_mmap,
848 #ifdef CONFIG_DEBUG_FS
849 .debugfs_init = msm_debugfs_init,
851 .ioctls = msm_ioctls,
852 .num_ioctls = ARRAY_SIZE(msm_ioctls),
855 .desc = "MSM Snapdragon DRM",
857 .major = MSM_VERSION_MAJOR,
858 .minor = MSM_VERSION_MINOR,
859 .patchlevel = MSM_VERSION_PATCHLEVEL,
862 #ifdef CONFIG_PM_SLEEP
863 static int msm_pm_suspend(struct device *dev)
865 struct drm_device *ddev = dev_get_drvdata(dev);
867 drm_kms_helper_poll_disable(ddev);
872 static int msm_pm_resume(struct device *dev)
874 struct drm_device *ddev = dev_get_drvdata(dev);
876 drm_kms_helper_poll_enable(ddev);
882 static const struct dev_pm_ops msm_pm_ops = {
883 SET_SYSTEM_SLEEP_PM_OPS(msm_pm_suspend, msm_pm_resume)
887 * Componentized driver support:
891 * NOTE: duplication of the same code as exynos or imx (or probably any other).
892 * so probably some room for some helpers
894 static int compare_of(struct device *dev, void *data)
896 return dev->of_node == data;
900 * Identify what components need to be added by parsing what remote-endpoints
901 * our MDP output ports are connected to. In the case of LVDS on MDP4, there
902 * is no external component that we need to add since LVDS is within MDP4
905 static int add_components_mdp(struct device *mdp_dev,
906 struct component_match **matchptr)
908 struct device_node *np = mdp_dev->of_node;
909 struct device_node *ep_node;
910 struct device *master_dev;
913 * on MDP4 based platforms, the MDP platform device is the component
914 * master that adds other display interface components to itself.
916 * on MDP5 based platforms, the MDSS platform device is the component
917 * master that adds MDP5 and other display interface components to
920 if (of_device_is_compatible(np, "qcom,mdp4"))
921 master_dev = mdp_dev;
923 master_dev = mdp_dev->parent;
925 for_each_endpoint_of_node(np, ep_node) {
926 struct device_node *intf;
927 struct of_endpoint ep;
930 ret = of_graph_parse_endpoint(ep_node, &ep);
932 dev_err(mdp_dev, "unable to parse port endpoint\n");
933 of_node_put(ep_node);
938 * The LCDC/LVDS port on MDP4 is a speacial case where the
939 * remote-endpoint isn't a component that we need to add
941 if (of_device_is_compatible(np, "qcom,mdp4") &&
946 * It's okay if some of the ports don't have a remote endpoint
947 * specified. It just means that the port isn't connected to
948 * any external interface.
950 intf = of_graph_get_remote_port_parent(ep_node);
954 drm_of_component_match_add(master_dev, matchptr, compare_of,
962 static int compare_name_mdp(struct device *dev, void *data)
964 return (strstr(dev_name(dev), "mdp") != NULL);
967 static int add_display_components(struct device *dev,
968 struct component_match **matchptr)
970 struct device *mdp_dev;
974 * MDP5 based devices don't have a flat hierarchy. There is a top level
975 * parent: MDSS, and children: MDP5, DSI, HDMI, eDP etc. Populate the
976 * children devices, find the MDP5 node, and then add the interfaces
977 * to our components list.
979 if (of_device_is_compatible(dev->of_node, "qcom,mdss")) {
980 ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
982 dev_err(dev, "failed to populate children devices\n");
986 mdp_dev = device_find_child(dev, NULL, compare_name_mdp);
988 dev_err(dev, "failed to find MDSS MDP node\n");
989 of_platform_depopulate(dev);
995 /* add the MDP component itself */
996 drm_of_component_match_add(dev, matchptr, compare_of,
1003 ret = add_components_mdp(mdp_dev, matchptr);
1005 of_platform_depopulate(dev);
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 = "qcom,kgsl-3d0" },
1022 static int add_gpu_components(struct device *dev,
1023 struct component_match **matchptr)
1025 struct device_node *np;
1027 np = of_find_matching_node(NULL, msm_gpu_match);
1031 drm_of_component_match_add(dev, matchptr, compare_of, np);
1038 static int msm_drm_bind(struct device *dev)
1040 return msm_drm_init(dev, &msm_driver);
1043 static void msm_drm_unbind(struct device *dev)
1045 msm_drm_uninit(dev);
1048 static const struct component_master_ops msm_drm_ops = {
1049 .bind = msm_drm_bind,
1050 .unbind = msm_drm_unbind,
1057 static int msm_pdev_probe(struct platform_device *pdev)
1059 struct component_match *match = NULL;
1062 ret = add_display_components(&pdev->dev, &match);
1066 ret = add_gpu_components(&pdev->dev, &match);
1070 /* on all devices that I am aware of, iommu's which can map
1071 * any address the cpu can see are used:
1073 ret = dma_set_mask_and_coherent(&pdev->dev, ~0);
1077 return component_master_add_with_match(&pdev->dev, &msm_drm_ops, match);
1080 static int msm_pdev_remove(struct platform_device *pdev)
1082 component_master_del(&pdev->dev, &msm_drm_ops);
1083 of_platform_depopulate(&pdev->dev);
1088 static const struct of_device_id dt_match[] = {
1089 { .compatible = "qcom,mdp4", .data = (void *)4 }, /* MDP4 */
1090 { .compatible = "qcom,mdss", .data = (void *)5 }, /* MDP5 MDSS */
1093 MODULE_DEVICE_TABLE(of, dt_match);
1095 static struct platform_driver msm_platform_driver = {
1096 .probe = msm_pdev_probe,
1097 .remove = msm_pdev_remove,
1100 .of_match_table = dt_match,
1105 static int __init msm_drm_register(void)
1111 msm_hdmi_register();
1113 return platform_driver_register(&msm_platform_driver);
1116 static void __exit msm_drm_unregister(void)
1119 platform_driver_unregister(&msm_platform_driver);
1120 msm_hdmi_unregister();
1121 adreno_unregister();
1122 msm_edp_unregister();
1123 msm_dsi_unregister();
1124 msm_mdp_unregister();
1127 module_init(msm_drm_register);
1128 module_exit(msm_drm_unregister);
1130 MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
1131 MODULE_DESCRIPTION("MSM DRM Driver");
1132 MODULE_LICENSE("GPL");