[RFC PATCH 2/3] drm/ipvr: drm driver for vxd392
Cheng, Yao
yao.cheng at intel.com
Tue Oct 14 19:14:33 PDT 2014
Hi Herrmann
> -----Original Message-----
> From: David Herrmann [mailto:dh.herrmann at gmail.com]
> Sent: Monday, October 13, 2014 10:27 PM
> To: Cheng, Yao
> Cc: Intel Graphics Development; Jiang, Fei; dri-devel at lists.freedesktop.org;
> Vetter, Daniel
> Subject: Re: [RFC PATCH 2/3] drm/ipvr: drm driver for vxd392
>
> Hi
>
> > +static struct drm_ioctl_desc ipvr_gem_ioctls[] = {
> > + DRM_IOCTL_DEF_DRV(IPVR_CONTEXT_CREATE,
> > + ipvr_context_create_ioctl, DRM_UNLOCKED),
> > + DRM_IOCTL_DEF_DRV(IPVR_CONTEXT_DESTROY,
> > + ipvr_context_destroy_ioctl, DRM_UNLOCKED),
> > + DRM_IOCTL_DEF_DRV(IPVR_MISC,
> > + ipvr_misc_ioctl, DRM_AUTH),
> > + DRM_IOCTL_DEF_DRV(IPVR_GEM_EXECBUFFER,
> > + ipvr_gem_execbuffer, DRM_AUTH|DRM_UNLOCKED),
> > + DRM_IOCTL_DEF_DRV(IPVR_GEM_BUSY,
> > + ipvr_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
> > + DRM_IOCTL_DEF_DRV(IPVR_GEM_CREATE,
> > + ipvr_gem_create_ioctl, DRM_UNLOCKED),
> > + DRM_IOCTL_DEF_DRV(IPVR_GEM_MMAP,
> > + ipvr_gem_mmap_ioctl, DRM_UNLOCKED),
>
> Why do you need this ioctl? mmap() should work perfectly fine. I don't see
> why you require people to use a ipvr specific ioctl to map buffers.
Many thanks to your comments, in our existing libdrm helper and userspace drivers, mmap_ioctl was the interface of mapping objects. We continued using the ioctl way for compatibility. Is it mandatory to implement mmap() to replace mmap_ioctl for GEM drivers?
>
> > + DRM_IOCTL_DEF_DRV(IPVR_SYNC_CPU,
> > + ipvr_sync_cpu_ioctl, DRM_UNLOCKED),
> > + DRM_IOCTL_DEF_DRV(IPVR_GEM_WAIT,
> > + ipvr_gem_wait_ioctl, DRM_AUTH|DRM_UNLOCKED),
> > + DRM_IOCTL_DEF_DRV(IPVR_GEM_USERPTR,
> > + ipvr_gem_userptr_ioctl, DRM_UNLOCKED), };
> > +
> > +static void ipvr_gem_init(struct drm_device *dev) {
> > + struct drm_ipvr_private *dev_priv = dev->dev_private;
> > +
> > + dev_priv->ipvr_bo_slab = kmem_cache_create("ipvr_gem_object",
> > + sizeof(union drm_ipvr_gem_objects), 0,
> > + SLAB_HWCACHE_ALIGN, NULL);
> > +
> > + INIT_LIST_HEAD(&dev_priv->ipvr_mm.unbound_list);
> > + INIT_LIST_HEAD(&dev_priv->ipvr_mm.bound_list);
> > + spin_lock_init(&dev_priv->ipvr_mm.object_stat_lock);
> > +
> > + dev_priv->ipvr_mm.interruptible = true; }
> > +
> > +static void ipvr_gem_setup_mmu(struct drm_device *dev,
> > + unsigned long linear_start,
> > + unsigned long linear_end,
> > + unsigned long tiling_start,
> > + unsigned long tiling_end) {
> > + /* Let GEM Manage all of the aperture.
> > + *
> > + * However, leave one page at the end still bound to the scratch page.
> > + * There are a number of places where hardware apparently
> prefetches
> > + * past the end of the object, and we've seen multiple hangs with the
> > + * GPU head pointer stuck in a batchbuffer bound at last page of the
> > + * aperture. One page should be enough to keep any prefetching
> inside
> > + * of the aperture.
> > + */
> > + struct drm_ipvr_private *dev_priv = dev->dev_private;
> > + struct ipvr_address_space *addr_space = &dev_priv->addr_space;
> > +
> > + /* todo: add sanity check */
> > + addr_space->dev = dev_priv->dev;
> > + INIT_LIST_HEAD(&addr_space->active_list);
> > + INIT_LIST_HEAD(&addr_space->inactive_list);
> > +
> > + /* Subtract the guard page ... */
> > + drm_mm_init(&addr_space->linear_mm, linear_start,
> > + linear_end - linear_start - PAGE_SIZE);
> > + dev_priv->addr_space.linear_start = linear_start;
> > + dev_priv->addr_space.linear_total = linear_end - linear_start;
> > +
> > + drm_mm_init(&addr_space->tiling_mm, tiling_start,
> > + tiling_end - tiling_start - PAGE_SIZE);
> > + dev_priv->addr_space.tiling_start = tiling_start;
> > + dev_priv->addr_space.tiling_total = tiling_end - tiling_start;
> > +}
> > +
> > +static void ipvr_do_takedown(struct drm_device *dev) {
> > + /* todo: need check if need clean up mm here */
> > + ipvr_ved_uninit(dev);
> > +}
> > +
> > +static int32_t ipvr_drm_unload(struct drm_device *dev) {
> > + struct drm_ipvr_private *dev_priv = dev->dev_private;
> > +
> > + BUG_ON(!dev->platformdev);
> > + BUG_ON(atomic_read(&dev_priv->ved_power_usage));
> > +
> > + IPVR_DEBUG_ENTRY("entered.");
> > + if (dev_priv) {
> > + WARN_ON(pm_runtime_get_sync(&dev->platformdev->dev) <
> > + 0);
> > +
> > + if (dev_priv->ipvr_bo_slab)
> > + kmem_cache_destroy(dev_priv->ipvr_bo_slab);
> > + ipvr_fence_driver_fini(dev_priv);
> > +
> > + ipvr_do_takedown(dev);
> > +
> > +
> > + WARN_ON(pm_runtime_put_sync_suspend(&dev->platformdev->dev)
> < 0);
> > +
> > + if (dev_priv->validate_ctx.buffers)
> > + vfree(dev_priv->validate_ctx.buffers);
> > +
> > + if (dev_priv->pf_pd) {
> > + ipvr_mmu_free_pagedir(dev_priv->pf_pd);
> > + dev_priv->pf_pd = NULL;
> > + }
> > + if (dev_priv->mmu) {
> > + ipvr_mmu_driver_takedown(dev_priv->mmu);
> > + dev_priv->mmu = NULL;
> > + }
> > +
> > + if (dev_priv->ved_reg_base) {
> > + iounmap(dev_priv->ved_reg_base - dev_priv-
> >ved_reg_offset);
> > + dev_priv->ved_reg_base = NULL;
> > + dev_priv->ved_reg_offset = 0;
> > + }
> > +
> > + list_del(&dev_priv->default_ctx.head);
> > + idr_remove(&dev_priv->ipvr_ctx_idr, dev_priv-
> >default_ctx.ctx_id);
> > + kfree(dev_priv);
> > +
> > + }
> > +
> > + pm_runtime_disable(&dev->platformdev->dev);
> > +
> > + return 0;
> > +}
> > +
> > +static int32_t ipvr_drm_load(struct drm_device *dev, unsigned long
> > +flags) {
> > + struct drm_ipvr_private *dev_priv;
> > + int32_t ctx_id, ret = 0;
> > + struct platform_device *platdev;
> > + struct resource *res_mmio, *res_reg;
> > + void __iomem* mmio_addr;
> > +
> > + dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL);
> > + if (dev_priv == NULL)
> > + return -ENOMEM;
> > +
> > + dev->dev_private = dev_priv;
> > + dev_priv->dev = dev;
> > +
> > + BUG_ON(!dev->platformdev);
> > + platdev = dev->platformdev;
> > +
> > + mutex_init(&dev_priv->cmdbuf_mutex);
> > + INIT_LIST_HEAD(&dev_priv->validate_ctx.validate_list);
> > +
> > + dev_priv->pci_root = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
> > + if (!dev_priv->pci_root) {
> > + kfree(dev_priv);
> > + return -ENODEV;
> > + }
> > +
> > + dev->irq = platform_get_irq(platdev, 0);
> > + if (dev->irq < 0) {
> > + ret = -ENODEV;
> > + goto out_err;
> > + }
> > +
> > + res_mmio = platform_get_resource(platdev, IORESOURCE_MEM, 0);
> > + res_reg = platform_get_resource(platdev, IORESOURCE_REG, 0);
> > + if (!res_mmio || !res_reg) {
> > + ret = -ENXIO;
> > + goto out_err;
> > + }
> > +
> > + mmio_addr = ioremap_wc(res_mmio->start,
> > + res_mmio->end - res_mmio->start);
> > + if (IS_ERR(mmio_addr)) {
> > + ret = -EACCES;
> > + goto out_err;
> > + }
> > +
> > + dev_priv->ved_reg_base = mmio_addr + res_reg->start;
> > + dev_priv->ved_reg_offset = res_reg->start;
> > + IPVR_DEBUG_VED("ved_reg_base is %p, range is 0x%llx - 0x%llx.\n",
> > + dev_priv->ved_reg_base,
> > + res_reg->start, res_reg->end);
> > +
> > + platform_set_drvdata(dev->platformdev, dev);
> > + pm_runtime_enable(&dev->platformdev->dev);
> > +
> > + if (pm_runtime_get_sync(&dev->platformdev->dev) < 0) {
> > + ret = -EBUSY;
> > + goto out_err;
> > + }
> > +
> > + IPVR_DEBUG_INIT("MSVDX_CORE_REV_OFFSET by readl is 0x%x.\n",
> > + readl(dev_priv->ved_reg_base + 0x640));
> > + IPVR_DEBUG_INIT("MSVDX_CORE_REV_OFFSET by
> VED_REG_READ32 is 0x%x.\n",
> > + VED_REG_READ32(MSVDX_CORE_REV_OFFSET));
> > +
> > + /* mmu init */
> > + dev_priv->mmu = ipvr_mmu_driver_init((void *)0,
> > + drm_ipvr_trap_pagefaults,
> > + 0, dev_priv);
> > + if (!dev_priv->mmu) {
> > + ret = -EBUSY;
> > + goto out_err;
> > + }
> > +
> > + dev_priv->pf_pd = ipvr_mmu_alloc_pd(dev_priv->mmu, 1, 0);
> > + if (!dev_priv->pf_pd) {
> > + ret = -ENOMEM;
> > + goto out_err;
> > + }
> > +
> > + ipvr_mmu_set_pd_context(ipvr_mmu_get_default_pd(dev_priv-
> >mmu), 0);
> > + ipvr_mmu_set_pd_context(dev_priv->pf_pd, 1);
> > +
> > + /*
> > + * Initialize sequence numbers for the different command
> > + * submission mechanisms.
> > + */
> > + dev_priv->last_seq = 1;
> > +
> > + ipvr_gem_init(dev);
> > +
> > + ipvr_gem_setup_mmu(dev,
> > + IPVR_MEM_MMU_LINEAR_START,
> > + IPVR_MEM_MMU_LINEAR_END,
> > + IPVR_MEM_MMU_TILING_START,
> > + IPVR_MEM_MMU_TILING_END);
> > +
> > + ipvr_ved_init(dev);
> > +
> > + WARN_ON(pm_runtime_put_sync_suspend(&dev->platformdev-
> >dev) <
> > + 0);
> > +
> > + dev_priv->ved_private->ved_needs_reset = 1;
> > + mutex_init(&dev_priv->ved_pm_mutex);
> > + atomic_set(&dev_priv->ved_power_usage, 0);
> > +
> > + ipvr_fence_driver_init(dev_priv);
> > +
> > + dev_priv->validate_ctx.buffers =
> > + vmalloc(IPVR_NUM_VALIDATE_BUFFERS *
> > + sizeof(struct ipvr_validate_buffer));
> > + if (!dev_priv->validate_ctx.buffers) {
> > + ret = -ENOMEM;
> > + goto out_err;
> > + }
> > +
> > + /* ipvr context initialization */
> > + INIT_LIST_HEAD(&dev_priv->ipvr_ctx_list);
> > + spin_lock_init(&dev_priv->ipvr_ctx_lock);
> > + idr_init(&dev_priv->ipvr_ctx_idr);
> > + /* default ipvr context is used for scaling, rotation case */
> > + ctx_id = idr_alloc(&dev_priv->ipvr_ctx_idr, &dev_priv->default_ctx,
> > + IPVR_MIN_CONTEXT_ID, IPVR_MAX_CONTEXT_ID,
> > + GFP_KERNEL);
> > + if (ctx_id < 0) {
> > + return -ENOMEM;
> > + goto out_err;
> > + }
> > + dev_priv->default_ctx.ctx_id = ctx_id;
> > + INIT_LIST_HEAD(&dev_priv->default_ctx.head);
> > + dev_priv->default_ctx.ctx_type = 0;
> > + dev_priv->default_ctx.ipvr_fpriv = NULL;
> > +
> > + /* don't need protect with spinlock during module load stage */
> > + list_add(&dev_priv->default_ctx.head, &dev_priv->ipvr_ctx_list);
> > + dev_priv->default_ctx.tiling_scheme = 0;
> > + dev_priv->default_ctx.tiling_stride = 0;
> > +
> > + return 0;
> > +out_err:
> > + ipvr_drm_unload(dev);
> > + return ret;
> > +
> > +}
> > +
> > +/*
> > + * The .open() method is called every time the device is opened by an
> > + * application. Drivers can allocate per-file private data in this
> > +method and
> > + * store them in the struct drm_file::driver_priv field. Note that
> > +the .open()
> > + * method is called before .firstopen().
> > + */
> > +static int32_t
> > +ipvr_drm_open(struct drm_device *dev, struct drm_file *file_priv) {
> > + struct drm_ipvr_file_private *ipvr_fp;
> > + IPVR_DEBUG_ENTRY("enter\n");
> > +
> > + ipvr_fp = kzalloc(sizeof(*ipvr_fp), GFP_KERNEL);
> > + if (unlikely(ipvr_fp == NULL))
> > + return -ENOMEM;
> > +
> > + file_priv->driver_priv = ipvr_fp;
> > +
> > + return 0;
> > +}
> > +
> > +/*
> > + * The close operation is split into .preclose() and .postclose() methods.
> > + * Drivers must stop and cleanup all per-file operations in the
> > +.preclose()
> > + * method. For instance pending vertical blanking and page flip
> > +events must be
> > + * cancelled. No per-file operation is allowed on the file handle
> > +after
> > + * returning from the .preclose() method.
> > + */
> > +static void
> > +ipvr_drm_preclose(struct drm_device *dev, struct drm_file *file_priv)
> > +{
> > + /* if user didn't destory ctx explicitly, remove ctx here */
> > + struct drm_ipvr_private *dev_priv;
> > + struct drm_ipvr_file_private *ipvr_fpriv;
> > + struct ved_private *ved_priv;
> > + struct ipvr_context *ipvr_ctx = NULL;
> > + unsigned long irq_flags;
> > +
> > + IPVR_DEBUG_ENTRY("enter\n");
> > + dev_priv = dev->dev_private;
> > + ipvr_fpriv = file_priv->driver_priv;
> > + ved_priv = dev_priv->ved_private;
> > +
> > + if (ipvr_fpriv->ctx_id == IPVR_CONTEXT_INVALID_ID)
> > + return;
> > + ipvr_ctx = (struct ipvr_context *)
> > + idr_find(&dev_priv->ipvr_ctx_idr, ipvr_fpriv->ctx_id);
> > + if (!ipvr_ctx || (ipvr_ctx->ipvr_fpriv != ipvr_fpriv)) {
> > + IPVR_DEBUG_GENERAL("ctx for id %d has already destroyed\n",
> > + ipvr_fpriv->ctx_id);
> > + return;
> > + }
> > + IPVR_DEBUG_PM("Video:remove context profile %d,
> entrypoint %d\n",
> > + (ipvr_ctx->ctx_type >> 8) & 0xff,
> > + (ipvr_ctx->ctx_type & 0xff));
> > + mutex_lock(&ved_priv->ved_mutex);
> > + if (ved_priv->ipvr_ctx == ipvr_ctx )
> > + ved_priv->ipvr_ctx = NULL;
> > + mutex_unlock(&ved_priv->ved_mutex);
> > +
> > + spin_lock_irqsave(&dev_priv->ipvr_ctx_lock, irq_flags);
> > + list_del(&ipvr_ctx->head);
> > + ipvr_fpriv->ctx_id = IPVR_CONTEXT_INVALID_ID;
> > + spin_unlock_irqrestore(&dev_priv->ipvr_ctx_lock, irq_flags);
> > +
> > + idr_remove(&dev_priv->ipvr_ctx_idr, ipvr_ctx->ctx_id);
> > +
> > + kfree(ipvr_ctx );
> > +}
> > +
> > +/*
> > + * Finally the .postclose() method is called as the last step of the
> > +close
> > + * operation, right before calling the .lastclose() method if no
> > +other open
> > + * file handle exists for the device. Drivers that have allocated
> > +per-file
> > + * private data in the .open() method should free it here.
> > + */
> > +static void
> > +ipvr_drm_postclose(struct drm_device *dev, struct drm_file
> > +*file_priv) {
> > + struct drm_ipvr_file_private *ipvr_fpriv = file_priv->driver_priv;
> > + IPVR_DEBUG_ENTRY("enter\n");
> > + kfree(ipvr_fpriv);
> > +}
>
> postclose() is deprecated. You can safely move this into preclose().
Thx, will update it in next version.
>
> > +
> > +static irqreturn_t ipvr_irq_handler(int32_t irq, void *arg) {
> > + struct drm_device *dev = (struct drm_device *) arg;
> > + WARN_ON(ved_irq_handler(dev));
> > + return IRQ_HANDLED;
> > +}
> > +
> > +static const struct file_operations ipvr_fops = {
> > + .owner = THIS_MODULE,
> > + .open = drm_open,
> > + .release = drm_release,
> > + .unlocked_ioctl = drm_ioctl,
> > +#ifdef CONFIG_COMPAT
> > + .compat_ioctl = drm_ioctl,
> > +#endif
> > + /* no need to define mmap. User space maps bo with
> > +DRM_IPVR_GEM_MMAP */ };
> > +
> > +static int32_t ipvr_drm_freeze(struct drm_device *dev) {
> > + int32_t ret;
> > + int32_t power_usage;
> > + struct drm_ipvr_private *dev_priv = dev->dev_private;
> > +
> > + IPVR_DEBUG_ENTRY("enter\n");
> > + power_usage = atomic_read(&dev_priv->ved_power_usage);
> > + BUG_ON(power_usage < 0);
> > + if (power_usage > 0) {
> > + IPVR_DEBUG_PM("VED power usage is %d, skip freezing\n",
> power_usage);
> > + return 0;
> > + }
> > +
> > + ret = ved_check_idle(dev);
> > + if (ret) {
> > + IPVR_DEBUG_PM("VED check idle fail: %d, skip freezing\n", ret);
> > + return 0;
> > + }
> > +
> > + if (dev->irq_enabled) {
> > + ret = drm_irq_uninstall(dev);
> > + if (unlikely(ret)) {
> > + IPVR_ERROR("Error uninstalling IRQ handler: %d\n", ret);
> > + return -EFAULT;
> > + }
> > + IPVR_DEBUG_PM("Successfully uninstalled IRQ\n");
> > + }
> > + else
> > + IPVR_DEBUG_PM("irq_enabled is %d\n",
> > + dev->irq_enabled);
> > +
> > + if (is_ved_on(dev)) {
> > + if (!ved_power_off(dev)) {
> > + IPVR_ERROR("Failed to power off VED\n");
> > + return -EFAULT;
> > + }
> > + IPVR_DEBUG_PM("Successfully powered off\n");
> > + } else {
> > + IPVR_DEBUG_PM("Skiped power-off since already powered
> off\n");
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int32_t ipvr_drm_thaw(struct drm_device *dev) {
> > + int ret;
> > + IPVR_DEBUG_ENTRY("enter\n");
> > + if (!is_ved_on(dev)) {
> > + if (!ved_power_on(dev)) {
> > + IPVR_ERROR("Failed to power on VED\n");
> > + return -EFAULT;
> > + }
> > + IPVR_DEBUG_PM("Successfully powered on\n");
> > + } else {
> > + IPVR_DEBUG_PM("Skiped power-on since already powered
> on\n");
> > + }
> > +
> > + if (!dev->irq_enabled) {
> > + ret = drm_irq_install(dev, dev->irq);
> > + if (ret) {
> > + IPVR_ERROR("Error installing IRQ handler: %d\n", ret);
> > + return -EFAULT;
> > + }
> > + IPVR_DEBUG_PM("Successfully installed IRQ\n");
> > + }
> > + else
> > + IPVR_DEBUG_PM("irq_enabled is %d\n",
> > + dev->irq_enabled);
> > +
> > + return 0;
> > +}
> > +
> > +static int32_t ipvr_pm_suspend(struct device *dev) {
> > + struct platform_device *platformdev = to_platform_device(dev);
> > + struct drm_device *drm_dev = platform_get_drvdata(platformdev);
> > + IPVR_DEBUG_PM("PM suspend called\n");
> > + BUG_ON(!drm_dev);
> > + return ipvr_drm_freeze(drm_dev); } static int32_t
> > +ipvr_pm_resume(struct device *dev) {
> > + struct platform_device *platformdev = to_platform_device(dev);
> > + struct drm_device *drm_dev = platform_get_drvdata(platformdev);
> > + IPVR_DEBUG_PM("PM resume called\n");
> > + BUG_ON(!drm_dev);
> > + return ipvr_drm_thaw(drm_dev); }
> > +
> > +/*
> > + * dump GEM API is mainly for dumb buffers suitable for scanout,
> > + * it is not needed for ipvr driver.
> > + * gem_vm_ops is used for mmap case, also not needed for ipvr
> > + * todo: prime support can be enabled later */ static struct
> > +drm_driver ipvr_drm_driver = {
> > + .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM,
> > + .load = ipvr_drm_load,
> > + .unload = ipvr_drm_unload,
> > + .open = ipvr_drm_open,
> > + .preclose = ipvr_drm_preclose,
> > + .postclose = ipvr_drm_postclose,
> > + .irq_handler = ipvr_irq_handler,
> > + .set_busid = drm_platform_set_busid,
> This should be NULL for new drivers.
>
> > + .gem_free_object = ipvr_gem_free_object, #ifdef
> > +CONFIG_DEBUG_FS
> > + .debugfs_init = ipvr_debugfs_init,
> > + .debugfs_cleanup = ipvr_debugfs_cleanup, #endif
> > + .ioctls = ipvr_gem_ioctls,
> > + .num_ioctls = ARRAY_SIZE(ipvr_gem_ioctls),
> > + .fops = &ipvr_fops,
> > + .name = IPVR_DRIVER_NAME,
> > + .desc = IPVR_DRIVER_DESC,
> > + .date = IPVR_DRIVER_DATE,
> > + .major = IPVR_DRIVER_MAJOR,
> > + .minor = IPVR_DRIVER_MINOR,
> > + .patchlevel = IPVR_DRIVER_PATCHLEVEL, };
> > +
> > +static int32_t ipvr_plat_probe(struct platform_device *device) {
> > + return drm_platform_init(&ipvr_drm_driver, device);
>
> drm_platform_init() should be used. Please use drm_dev_alloc(),
> drm_dev_register() directly. udl and tegra should serve as example.
>
Thx, will update it in next version.
> > +}
> > +
> > +static int32_t ipvr_plat_remove(struct platform_device *device) {
> > + drm_put_dev(platform_get_drvdata(device));
>
> Again, please use drm_dev_unregister() + drm_dev_unref() directly.
Thx, will update it in next version.
>
> Thanks
> David
>
> > + return 0;
> > +}
> > +
> > +static struct dev_pm_ops ipvr_pm_ops = {
> > + .suspend = ipvr_pm_suspend,
> > + .resume = ipvr_pm_resume,
> > + .freeze = ipvr_pm_suspend,
> > + .thaw = ipvr_pm_resume,
> > + .poweroff = ipvr_pm_suspend,
> > + .restore = ipvr_pm_resume,
> > +#ifdef CONFIG_PM_RUNTIME
> > + .runtime_suspend = ipvr_pm_suspend,
> > + .runtime_resume = ipvr_pm_resume, #endif };
> > +
> > +static struct platform_driver ipvr_plat_driver = {
> > + .driver = {
> > + .name = "ipvr-ved",
> > + .owner = THIS_MODULE,
> > +#ifdef CONFIG_PM
> > + .pm = &ipvr_pm_ops,
> > +#endif
> > + },
> > + .probe = ipvr_plat_probe,
> > + .remove = ipvr_plat_remove,
> > +};
> > +
> > +module_platform_driver(ipvr_plat_driver);
> > +MODULE_LICENSE("GPL");
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