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 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;
59 if (WARN_ON(priv->num_aspaces >= ARRAY_SIZE(priv->aspace)))
62 priv->aspace[priv->num_aspaces] = aspace;
64 return priv->num_aspaces++;
67 #ifdef CONFIG_DRM_MSM_REGISTER_LOGGING
68 static bool reglog = false;
69 MODULE_PARM_DESC(reglog, "Enable register read/write logging");
70 module_param(reglog, bool, 0600);
75 #ifdef CONFIG_DRM_FBDEV_EMULATION
76 static bool fbdev = true;
77 MODULE_PARM_DESC(fbdev, "Enable fbdev compat layer");
78 module_param(fbdev, bool, 0600);
81 static char *vram = "16m";
82 MODULE_PARM_DESC(vram, "Configure VRAM size (for devices without IOMMU/GPUMMU)");
83 module_param(vram, charp, 0);
85 bool dumpstate = false;
86 MODULE_PARM_DESC(dumpstate, "Dump KMS state on errors");
87 module_param(dumpstate, bool, 0600);
93 struct clk *msm_clk_get(struct platform_device *pdev, const char *name)
98 clk = devm_clk_get(&pdev->dev, name);
99 if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER)
102 snprintf(name2, sizeof(name2), "%s_clk", name);
104 clk = devm_clk_get(&pdev->dev, name2);
106 dev_warn(&pdev->dev, "Using legacy clk name binding. Use "
107 "\"%s\" instead of \"%s\"\n", name, name2);
112 void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
115 struct resource *res;
120 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
122 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
125 dev_err(&pdev->dev, "failed to get memory resource: %s\n", name);
126 return ERR_PTR(-EINVAL);
129 size = resource_size(res);
131 ptr = devm_ioremap_nocache(&pdev->dev, res->start, size);
133 dev_err(&pdev->dev, "failed to ioremap: %s\n", name);
134 return ERR_PTR(-ENOMEM);
138 printk(KERN_DEBUG "IO:region %s %p %08lx\n", dbgname, ptr, size);
143 void msm_writel(u32 data, void __iomem *addr)
146 printk(KERN_DEBUG "IO:W %p %08x\n", addr, data);
150 u32 msm_readl(const void __iomem *addr)
152 u32 val = readl(addr);
154 pr_err("IO:R %p %08x\n", addr, val);
158 struct vblank_event {
159 struct list_head node;
164 static void vblank_ctrl_worker(struct work_struct *work)
166 struct msm_vblank_ctrl *vbl_ctrl = container_of(work,
167 struct msm_vblank_ctrl, work);
168 struct msm_drm_private *priv = container_of(vbl_ctrl,
169 struct msm_drm_private, vblank_ctrl);
170 struct msm_kms *kms = priv->kms;
171 struct vblank_event *vbl_ev, *tmp;
174 spin_lock_irqsave(&vbl_ctrl->lock, flags);
175 list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
176 list_del(&vbl_ev->node);
177 spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
180 kms->funcs->enable_vblank(kms,
181 priv->crtcs[vbl_ev->crtc_id]);
183 kms->funcs->disable_vblank(kms,
184 priv->crtcs[vbl_ev->crtc_id]);
188 spin_lock_irqsave(&vbl_ctrl->lock, flags);
191 spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
194 static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
195 int crtc_id, bool enable)
197 struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
198 struct vblank_event *vbl_ev;
201 vbl_ev = kzalloc(sizeof(*vbl_ev), GFP_ATOMIC);
205 vbl_ev->crtc_id = crtc_id;
206 vbl_ev->enable = enable;
208 spin_lock_irqsave(&vbl_ctrl->lock, flags);
209 list_add_tail(&vbl_ev->node, &vbl_ctrl->event_list);
210 spin_unlock_irqrestore(&vbl_ctrl->lock, flags);
212 queue_work(priv->wq, &vbl_ctrl->work);
217 static int msm_drm_uninit(struct device *dev)
219 struct platform_device *pdev = to_platform_device(dev);
220 struct drm_device *ddev = platform_get_drvdata(pdev);
221 struct msm_drm_private *priv = ddev->dev_private;
222 struct msm_kms *kms = priv->kms;
223 struct msm_gpu *gpu = priv->gpu;
224 struct msm_vblank_ctrl *vbl_ctrl = &priv->vblank_ctrl;
225 struct vblank_event *vbl_ev, *tmp;
227 /* We must cancel and cleanup any pending vblank enable/disable
228 * work before drm_irq_uninstall() to avoid work re-enabling an
229 * irq after uninstall has disabled it.
231 cancel_work_sync(&vbl_ctrl->work);
232 list_for_each_entry_safe(vbl_ev, tmp, &vbl_ctrl->event_list, node) {
233 list_del(&vbl_ev->node);
237 msm_gem_shrinker_cleanup(ddev);
239 drm_kms_helper_poll_fini(ddev);
241 drm_dev_unregister(ddev);
243 msm_perf_debugfs_cleanup(priv);
244 msm_rd_debugfs_cleanup(priv);
246 #ifdef CONFIG_DRM_FBDEV_EMULATION
247 if (fbdev && priv->fbdev)
248 msm_fbdev_free(ddev);
250 drm_mode_config_cleanup(ddev);
252 pm_runtime_get_sync(dev);
253 drm_irq_uninstall(ddev);
254 pm_runtime_put_sync(dev);
256 flush_workqueue(priv->wq);
257 destroy_workqueue(priv->wq);
259 flush_workqueue(priv->atomic_wq);
260 destroy_workqueue(priv->atomic_wq);
262 if (kms && kms->funcs)
263 kms->funcs->destroy(kms);
266 mutex_lock(&ddev->struct_mutex);
267 // XXX what do we do here?
268 //pm_runtime_enable(&pdev->dev);
269 gpu->funcs->pm_suspend(gpu);
270 mutex_unlock(&ddev->struct_mutex);
271 gpu->funcs->destroy(gpu);
274 if (priv->vram.paddr) {
275 unsigned long attrs = DMA_ATTR_NO_KERNEL_MAPPING;
276 drm_mm_takedown(&priv->vram.mm);
277 dma_free_attrs(dev, priv->vram.size, NULL,
278 priv->vram.paddr, attrs);
281 component_unbind_all(dev, ddev);
283 msm_mdss_destroy(ddev);
285 ddev->dev_private = NULL;
293 static int get_mdp_ver(struct platform_device *pdev)
295 struct device *dev = &pdev->dev;
297 return (int) (unsigned long) of_device_get_match_data(dev);
300 #include <linux/of_address.h>
302 static int msm_init_vram(struct drm_device *dev)
304 struct msm_drm_private *priv = dev->dev_private;
305 struct device_node *node;
306 unsigned long size = 0;
309 /* In the device-tree world, we could have a 'memory-region'
310 * phandle, which gives us a link to our "vram". Allocating
311 * is all nicely abstracted behind the dma api, but we need
312 * to know the entire size to allocate it all in one go. There
314 * 1) device with no IOMMU, in which case we need exclusive
315 * access to a VRAM carveout big enough for all gpu
317 * 2) device with IOMMU, but where the bootloader puts up
318 * a splash screen. In this case, the VRAM carveout
319 * need only be large enough for fbdev fb. But we need
320 * exclusive access to the buffer to avoid the kernel
321 * using those pages for other purposes (which appears
322 * as corruption on screen before we have a chance to
323 * load and do initial modeset)
326 node = of_parse_phandle(dev->dev->of_node, "memory-region", 0);
329 ret = of_address_to_resource(node, 0, &r);
333 size = r.end - r.start;
334 DRM_INFO("using VRAM carveout: %lx@%pa\n", size, &r.start);
336 /* if we have no IOMMU, then we need to use carveout allocator.
337 * Grab the entire CMA chunk carved out in early startup in
340 } else if (!iommu_present(&platform_bus_type)) {
341 DRM_INFO("using %s VRAM carveout\n", vram);
342 size = memparse(vram, NULL);
346 unsigned long attrs = 0;
349 priv->vram.size = size;
351 drm_mm_init(&priv->vram.mm, 0, (size >> PAGE_SHIFT) - 1);
353 attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
354 attrs |= DMA_ATTR_WRITE_COMBINE;
356 /* note that for no-kernel-mapping, the vaddr returned
357 * is bogus, but non-null if allocation succeeded:
359 p = dma_alloc_attrs(dev->dev, size,
360 &priv->vram.paddr, GFP_KERNEL, attrs);
362 dev_err(dev->dev, "failed to allocate VRAM\n");
363 priv->vram.paddr = 0;
367 dev_info(dev->dev, "VRAM: %08x->%08x\n",
368 (uint32_t)priv->vram.paddr,
369 (uint32_t)(priv->vram.paddr + size));
375 static int msm_drm_init(struct device *dev, struct drm_driver *drv)
377 struct platform_device *pdev = to_platform_device(dev);
378 struct drm_device *ddev;
379 struct msm_drm_private *priv;
383 ddev = drm_dev_alloc(drv, dev);
385 dev_err(dev, "failed to allocate drm_device\n");
386 return PTR_ERR(ddev);
389 platform_set_drvdata(pdev, ddev);
391 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
397 ddev->dev_private = priv;
400 ret = msm_mdss_init(ddev);
407 priv->wq = alloc_ordered_workqueue("msm", 0);
408 priv->atomic_wq = alloc_ordered_workqueue("msm:atomic", 0);
409 init_waitqueue_head(&priv->pending_crtcs_event);
411 INIT_LIST_HEAD(&priv->inactive_list);
412 INIT_LIST_HEAD(&priv->vblank_ctrl.event_list);
413 INIT_WORK(&priv->vblank_ctrl.work, vblank_ctrl_worker);
414 spin_lock_init(&priv->vblank_ctrl.lock);
416 drm_mode_config_init(ddev);
418 /* Bind all our sub-components: */
419 ret = component_bind_all(dev, ddev);
421 msm_mdss_destroy(ddev);
427 ret = msm_init_vram(ddev);
431 msm_gem_shrinker_init(ddev);
433 switch (get_mdp_ver(pdev)) {
435 kms = mdp4_kms_init(ddev);
439 kms = mdp5_kms_init(ddev);
442 kms = ERR_PTR(-ENODEV);
448 * NOTE: once we have GPU support, having no kms should not
449 * be considered fatal.. ideally we would still support gpu
450 * and (for example) use dmabuf/prime to share buffers with
451 * imx drm driver on iMX5
453 dev_err(dev, "failed to load kms\n");
459 ret = kms->funcs->hw_init(kms);
461 dev_err(dev, "kms hw init failed: %d\n", ret);
466 ddev->mode_config.funcs = &mode_config_funcs;
468 ret = drm_vblank_init(ddev, priv->num_crtcs);
470 dev_err(dev, "failed to initialize vblank\n");
475 pm_runtime_get_sync(dev);
476 ret = drm_irq_install(ddev, kms->irq);
477 pm_runtime_put_sync(dev);
479 dev_err(dev, "failed to install IRQ handler\n");
484 ret = drm_dev_register(ddev, 0);
488 drm_mode_config_reset(ddev);
490 #ifdef CONFIG_DRM_FBDEV_EMULATION
492 priv->fbdev = msm_fbdev_init(ddev);
495 ret = msm_debugfs_late_init(ddev);
499 drm_kms_helper_poll_init(ddev);
512 static void load_gpu(struct drm_device *dev)
514 static DEFINE_MUTEX(init_lock);
515 struct msm_drm_private *priv = dev->dev_private;
517 mutex_lock(&init_lock);
520 priv->gpu = adreno_load_gpu(dev);
522 mutex_unlock(&init_lock);
525 static int msm_open(struct drm_device *dev, struct drm_file *file)
527 struct msm_file_private *ctx;
529 /* For now, load gpu on open.. to avoid the requirement of having
530 * firmware in the initrd.
534 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
538 file->driver_priv = ctx;
543 static void msm_postclose(struct drm_device *dev, struct drm_file *file)
545 struct msm_drm_private *priv = dev->dev_private;
546 struct msm_file_private *ctx = file->driver_priv;
548 mutex_lock(&dev->struct_mutex);
549 if (ctx == priv->lastctx)
550 priv->lastctx = NULL;
551 mutex_unlock(&dev->struct_mutex);
556 static void msm_lastclose(struct drm_device *dev)
558 struct msm_drm_private *priv = dev->dev_private;
560 drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
563 static irqreturn_t msm_irq(int irq, void *arg)
565 struct drm_device *dev = arg;
566 struct msm_drm_private *priv = dev->dev_private;
567 struct msm_kms *kms = priv->kms;
569 return kms->funcs->irq(kms);
572 static void msm_irq_preinstall(struct drm_device *dev)
574 struct msm_drm_private *priv = dev->dev_private;
575 struct msm_kms *kms = priv->kms;
577 kms->funcs->irq_preinstall(kms);
580 static int msm_irq_postinstall(struct drm_device *dev)
582 struct msm_drm_private *priv = dev->dev_private;
583 struct msm_kms *kms = priv->kms;
585 return kms->funcs->irq_postinstall(kms);
588 static void msm_irq_uninstall(struct drm_device *dev)
590 struct msm_drm_private *priv = dev->dev_private;
591 struct msm_kms *kms = priv->kms;
593 kms->funcs->irq_uninstall(kms);
596 static int msm_enable_vblank(struct drm_device *dev, unsigned int pipe)
598 struct msm_drm_private *priv = dev->dev_private;
599 struct msm_kms *kms = priv->kms;
602 DBG("dev=%p, crtc=%u", dev, pipe);
603 return vblank_ctrl_queue_work(priv, pipe, true);
606 static void msm_disable_vblank(struct drm_device *dev, unsigned int pipe)
608 struct msm_drm_private *priv = dev->dev_private;
609 struct msm_kms *kms = priv->kms;
612 DBG("dev=%p, crtc=%u", dev, pipe);
613 vblank_ctrl_queue_work(priv, pipe, false);
620 static int msm_ioctl_get_param(struct drm_device *dev, void *data,
621 struct drm_file *file)
623 struct msm_drm_private *priv = dev->dev_private;
624 struct drm_msm_param *args = data;
627 /* for now, we just have 3d pipe.. eventually this would need to
628 * be more clever to dispatch to appropriate gpu module:
630 if (args->pipe != MSM_PIPE_3D0)
638 return gpu->funcs->get_param(gpu, args->param, &args->value);
641 static int msm_ioctl_gem_new(struct drm_device *dev, void *data,
642 struct drm_file *file)
644 struct drm_msm_gem_new *args = data;
646 if (args->flags & ~MSM_BO_FLAGS) {
647 DRM_ERROR("invalid flags: %08x\n", args->flags);
651 return msm_gem_new_handle(dev, file, args->size,
652 args->flags, &args->handle);
655 static inline ktime_t to_ktime(struct drm_msm_timespec timeout)
657 return ktime_set(timeout.tv_sec, timeout.tv_nsec);
660 static int msm_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
661 struct drm_file *file)
663 struct drm_msm_gem_cpu_prep *args = data;
664 struct drm_gem_object *obj;
665 ktime_t timeout = to_ktime(args->timeout);
668 if (args->op & ~MSM_PREP_FLAGS) {
669 DRM_ERROR("invalid op: %08x\n", args->op);
673 obj = drm_gem_object_lookup(file, args->handle);
677 ret = msm_gem_cpu_prep(obj, args->op, &timeout);
679 drm_gem_object_unreference_unlocked(obj);
684 static int msm_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
685 struct drm_file *file)
687 struct drm_msm_gem_cpu_fini *args = data;
688 struct drm_gem_object *obj;
691 obj = drm_gem_object_lookup(file, args->handle);
695 ret = msm_gem_cpu_fini(obj);
697 drm_gem_object_unreference_unlocked(obj);
702 static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
703 struct drm_file *file)
705 struct drm_msm_gem_info *args = data;
706 struct drm_gem_object *obj;
712 obj = drm_gem_object_lookup(file, args->handle);
716 args->offset = msm_gem_mmap_offset(obj);
718 drm_gem_object_unreference_unlocked(obj);
723 static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
724 struct drm_file *file)
726 struct msm_drm_private *priv = dev->dev_private;
727 struct drm_msm_wait_fence *args = data;
728 ktime_t timeout = to_ktime(args->timeout);
731 DRM_ERROR("invalid pad: %08x\n", args->pad);
738 return msm_wait_fence(priv->gpu->fctx, args->fence, &timeout, true);
741 static int msm_ioctl_gem_madvise(struct drm_device *dev, void *data,
742 struct drm_file *file)
744 struct drm_msm_gem_madvise *args = data;
745 struct drm_gem_object *obj;
748 switch (args->madv) {
749 case MSM_MADV_DONTNEED:
750 case MSM_MADV_WILLNEED:
756 ret = mutex_lock_interruptible(&dev->struct_mutex);
760 obj = drm_gem_object_lookup(file, args->handle);
766 ret = msm_gem_madvise(obj, args->madv);
768 args->retained = ret;
772 drm_gem_object_unreference(obj);
775 mutex_unlock(&dev->struct_mutex);
779 static const struct drm_ioctl_desc msm_ioctls[] = {
780 DRM_IOCTL_DEF_DRV(MSM_GET_PARAM, msm_ioctl_get_param, DRM_AUTH|DRM_RENDER_ALLOW),
781 DRM_IOCTL_DEF_DRV(MSM_GEM_NEW, msm_ioctl_gem_new, DRM_AUTH|DRM_RENDER_ALLOW),
782 DRM_IOCTL_DEF_DRV(MSM_GEM_INFO, msm_ioctl_gem_info, DRM_AUTH|DRM_RENDER_ALLOW),
783 DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_PREP, msm_ioctl_gem_cpu_prep, DRM_AUTH|DRM_RENDER_ALLOW),
784 DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_FINI, msm_ioctl_gem_cpu_fini, DRM_AUTH|DRM_RENDER_ALLOW),
785 DRM_IOCTL_DEF_DRV(MSM_GEM_SUBMIT, msm_ioctl_gem_submit, DRM_AUTH|DRM_RENDER_ALLOW),
786 DRM_IOCTL_DEF_DRV(MSM_WAIT_FENCE, msm_ioctl_wait_fence, DRM_AUTH|DRM_RENDER_ALLOW),
787 DRM_IOCTL_DEF_DRV(MSM_GEM_MADVISE, msm_ioctl_gem_madvise, DRM_AUTH|DRM_RENDER_ALLOW),
790 static const struct vm_operations_struct vm_ops = {
791 .fault = msm_gem_fault,
792 .open = drm_gem_vm_open,
793 .close = drm_gem_vm_close,
796 static const struct file_operations fops = {
797 .owner = THIS_MODULE,
799 .release = drm_release,
800 .unlocked_ioctl = drm_ioctl,
801 .compat_ioctl = drm_compat_ioctl,
805 .mmap = msm_gem_mmap,
808 static struct drm_driver msm_driver = {
809 .driver_features = DRIVER_HAVE_IRQ |
816 .postclose = msm_postclose,
817 .lastclose = msm_lastclose,
818 .irq_handler = msm_irq,
819 .irq_preinstall = msm_irq_preinstall,
820 .irq_postinstall = msm_irq_postinstall,
821 .irq_uninstall = msm_irq_uninstall,
822 .enable_vblank = msm_enable_vblank,
823 .disable_vblank = msm_disable_vblank,
824 .gem_free_object = msm_gem_free_object,
825 .gem_vm_ops = &vm_ops,
826 .dumb_create = msm_gem_dumb_create,
827 .dumb_map_offset = msm_gem_dumb_map_offset,
828 .dumb_destroy = drm_gem_dumb_destroy,
829 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
830 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
831 .gem_prime_export = drm_gem_prime_export,
832 .gem_prime_import = drm_gem_prime_import,
833 .gem_prime_res_obj = msm_gem_prime_res_obj,
834 .gem_prime_pin = msm_gem_prime_pin,
835 .gem_prime_unpin = msm_gem_prime_unpin,
836 .gem_prime_get_sg_table = msm_gem_prime_get_sg_table,
837 .gem_prime_import_sg_table = msm_gem_prime_import_sg_table,
838 .gem_prime_vmap = msm_gem_prime_vmap,
839 .gem_prime_vunmap = msm_gem_prime_vunmap,
840 .gem_prime_mmap = msm_gem_prime_mmap,
841 #ifdef CONFIG_DEBUG_FS
842 .debugfs_init = msm_debugfs_init,
844 .ioctls = msm_ioctls,
845 .num_ioctls = DRM_MSM_NUM_IOCTLS,
848 .desc = "MSM Snapdragon DRM",
850 .major = MSM_VERSION_MAJOR,
851 .minor = MSM_VERSION_MINOR,
852 .patchlevel = MSM_VERSION_PATCHLEVEL,
855 #ifdef CONFIG_PM_SLEEP
856 static int msm_pm_suspend(struct device *dev)
858 struct drm_device *ddev = dev_get_drvdata(dev);
860 drm_kms_helper_poll_disable(ddev);
865 static int msm_pm_resume(struct device *dev)
867 struct drm_device *ddev = dev_get_drvdata(dev);
869 drm_kms_helper_poll_enable(ddev);
875 static const struct dev_pm_ops msm_pm_ops = {
876 SET_SYSTEM_SLEEP_PM_OPS(msm_pm_suspend, msm_pm_resume)
880 * Componentized driver support:
884 * NOTE: duplication of the same code as exynos or imx (or probably any other).
885 * so probably some room for some helpers
887 static int compare_of(struct device *dev, void *data)
889 return dev->of_node == data;
893 * Identify what components need to be added by parsing what remote-endpoints
894 * our MDP output ports are connected to. In the case of LVDS on MDP4, there
895 * is no external component that we need to add since LVDS is within MDP4
898 static int add_components_mdp(struct device *mdp_dev,
899 struct component_match **matchptr)
901 struct device_node *np = mdp_dev->of_node;
902 struct device_node *ep_node;
903 struct device *master_dev;
906 * on MDP4 based platforms, the MDP platform device is the component
907 * master that adds other display interface components to itself.
909 * on MDP5 based platforms, the MDSS platform device is the component
910 * master that adds MDP5 and other display interface components to
913 if (of_device_is_compatible(np, "qcom,mdp4"))
914 master_dev = mdp_dev;
916 master_dev = mdp_dev->parent;
918 for_each_endpoint_of_node(np, ep_node) {
919 struct device_node *intf;
920 struct of_endpoint ep;
923 ret = of_graph_parse_endpoint(ep_node, &ep);
925 dev_err(mdp_dev, "unable to parse port endpoint\n");
926 of_node_put(ep_node);
931 * The LCDC/LVDS port on MDP4 is a speacial case where the
932 * remote-endpoint isn't a component that we need to add
934 if (of_device_is_compatible(np, "qcom,mdp4") &&
939 * It's okay if some of the ports don't have a remote endpoint
940 * specified. It just means that the port isn't connected to
941 * any external interface.
943 intf = of_graph_get_remote_port_parent(ep_node);
947 drm_of_component_match_add(master_dev, matchptr, compare_of,
955 static int compare_name_mdp(struct device *dev, void *data)
957 return (strstr(dev_name(dev), "mdp") != NULL);
960 static int add_display_components(struct device *dev,
961 struct component_match **matchptr)
963 struct device *mdp_dev;
967 * MDP5 based devices don't have a flat hierarchy. There is a top level
968 * parent: MDSS, and children: MDP5, DSI, HDMI, eDP etc. Populate the
969 * children devices, find the MDP5 node, and then add the interfaces
970 * to our components list.
972 if (of_device_is_compatible(dev->of_node, "qcom,mdss")) {
973 ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
975 dev_err(dev, "failed to populate children devices\n");
979 mdp_dev = device_find_child(dev, NULL, compare_name_mdp);
981 dev_err(dev, "failed to find MDSS MDP node\n");
982 of_platform_depopulate(dev);
988 /* add the MDP component itself */
989 drm_of_component_match_add(dev, matchptr, compare_of,
996 ret = add_components_mdp(mdp_dev, matchptr);
998 of_platform_depopulate(dev);
1004 * We don't know what's the best binding to link the gpu with the drm device.
1005 * Fow now, we just hunt for all the possible gpus that we support, and add them
1008 static const struct of_device_id msm_gpu_match[] = {
1009 { .compatible = "qcom,adreno" },
1010 { .compatible = "qcom,adreno-3xx" },
1011 { .compatible = "qcom,kgsl-3d0" },
1015 static int add_gpu_components(struct device *dev,
1016 struct component_match **matchptr)
1018 struct device_node *np;
1020 np = of_find_matching_node(NULL, msm_gpu_match);
1024 drm_of_component_match_add(dev, matchptr, compare_of, np);
1031 static int msm_drm_bind(struct device *dev)
1033 return msm_drm_init(dev, &msm_driver);
1036 static void msm_drm_unbind(struct device *dev)
1038 msm_drm_uninit(dev);
1041 static const struct component_master_ops msm_drm_ops = {
1042 .bind = msm_drm_bind,
1043 .unbind = msm_drm_unbind,
1050 static int msm_pdev_probe(struct platform_device *pdev)
1052 struct component_match *match = NULL;
1055 ret = add_display_components(&pdev->dev, &match);
1059 ret = add_gpu_components(&pdev->dev, &match);
1063 /* on all devices that I am aware of, iommu's which can map
1064 * any address the cpu can see are used:
1066 ret = dma_set_mask_and_coherent(&pdev->dev, ~0);
1070 return component_master_add_with_match(&pdev->dev, &msm_drm_ops, match);
1073 static int msm_pdev_remove(struct platform_device *pdev)
1075 component_master_del(&pdev->dev, &msm_drm_ops);
1076 of_platform_depopulate(&pdev->dev);
1081 static const struct of_device_id dt_match[] = {
1082 { .compatible = "qcom,mdp4", .data = (void *)4 }, /* MDP4 */
1083 { .compatible = "qcom,mdss", .data = (void *)5 }, /* MDP5 MDSS */
1086 MODULE_DEVICE_TABLE(of, dt_match);
1088 static struct platform_driver msm_platform_driver = {
1089 .probe = msm_pdev_probe,
1090 .remove = msm_pdev_remove,
1093 .of_match_table = dt_match,
1098 static int __init msm_drm_register(void)
1104 msm_hdmi_register();
1106 return platform_driver_register(&msm_platform_driver);
1109 static void __exit msm_drm_unregister(void)
1112 platform_driver_unregister(&msm_platform_driver);
1113 msm_hdmi_unregister();
1114 adreno_unregister();
1115 msm_edp_unregister();
1116 msm_dsi_unregister();
1117 msm_mdp_unregister();
1120 module_init(msm_drm_register);
1121 module_exit(msm_drm_unregister);
1123 MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
1124 MODULE_DESCRIPTION("MSM DRM Driver");
1125 MODULE_LICENSE("GPL");