diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-22 13:08:22 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-22 13:08:22 -0700 |
commit | be53bfdb8088e9d1924199cc1a96e113756b1075 (patch) | |
tree | 8c65eb9d82ca4c0f11c17cfdc44d5263820b415b /drivers/gpu/drm/udl/udl_main.c | |
parent | b2094ef840697bc8ca5d17a83b7e30fad5f1e9fa (diff) | |
parent | 5466c7b1683a23dbbcfb7ee4a71c4f23886001c7 (diff) |
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm main changes from Dave Airlie:
"This is the main drm pull request, I'm probably going to send two more
smaller ones, will explain below.
This contains a patch that is also in the fbdev tree, but it should be
the same patch, it added an API for hot unplugging framebuffer
devices, and I need that API for a new driver.
It also contains some changes to the i2c tree which Jean has acked,
and one change to moorestown platform stuff in x86.
Highlights:
- new drivers: UDL driver for USB displaylink devices, kms only,
should support correct hotplug operations.
- core: i2c speedups + better hotplug support, EDID overriding via
firmware interface - allows user to load a firmware for a broken
monitor/kvm from userspace, it even has documentation for it.
- exynos: new HDMI audio + hdmi 1.4 + virtual output driver
- gma500: code cleanup
- radeon: cleanups, CS optimisations, streamout support and pageflip
fix
- nouveau: NVD9 displayport support + more reclocking work
- i915: re-enabling GMBUS, finish gpu patch (might help hibernation
who knows), missed irq fixes, stencil tiling fixes, interlaced
support, aliasesd PPGTT support for SNB/IVB, swizzling for SNB/IVB,
semaphore fixes
As well as the usual bunch of cleanups and fixes all over the place.
I've got two things I'd like to merge a bit later:
a) AMD support for all their new radeonhd 7000 series GPU and APUs.
AMD dropped this a bit late due to insane internal review
processes, (please AMD just follow Intel and let open source guys
ship stuff early) however I don't want to penalise people who own
this hardware (since its been on sale for 3-4 months and GPU hw
doesn't exactly have a lifetime in years) and consign them to
using closed drivers for longer than necessary. The changes are
well contained and just plug into the driver new gpu functionality
so they should be fairly regression proof. I just want to give
them a bit of a run on the hw AMD kindly sent me.
b) drm prime/dma-buf interface code. This is just infrastructure
code to expose the dma-buf stuff to drm drivers and to userspace.
I'm not planning on pushing any driver support in this cycle
(except maybe exynos), but I'd like to get the infrastructure code
in so for the next cycle I can start getting the driver support
into the individual drivers. We have started driver support for
i915, nouveau and udl along with I think exynos and omap in
staging. However this code relies on the dma-buf tree being
pulled into your tree first since it needs the latest interfaces
from that tree. I'll push to get that tree sent asap.
(oh and any warnings you see in i915 are gcc's fault from what anyone
can see)."
Fix up trivial conflicts in arch/x86/platform/mrst/mrst.c due to the new
msic_thermal_platform_data() thermal function being added next to the
tc35876x_platform_data() i2c device function..
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (326 commits)
drm/i915: use DDC_ADDR instead of hard-coding it
drm/radeon: use DDC_ADDR instead of hard-coding it
drm: remove unneeded redefinition of DDC_ADDR
drm/exynos: added virtual display driver.
drm: allow loading an EDID as firmware to override broken monitor
drm/exynos: enable hdmi audio feature
drm/exynos: add default pixel format for plane
drm/exynos: cleanup exynos_hdmi.h
drm/exynos: add is_local member in exynos_drm_subdrv struct
drm/exynos: add subdrv open/close functions
drm/exynos: remove module of exynos drm subdrv
drm/exynos: release pending pageflip events when closed
drm/exynos: added new funtion to get/put dma address.
drm/exynos: update gem and buffer framework.
drm/exynos: added mode_fixup feature and code clean.
drm/exynos: add HDMI version 1.4 support
drm/exynos: remove exynos_mixer.h
gma500: Fix mmap frambuffer
drm/radeon: Drop radeon_gem_object_(un)pin.
drm/radeon: Restrict offset for legacy display engine.
...
Diffstat (limited to 'drivers/gpu/drm/udl/udl_main.c')
-rw-r--r-- | drivers/gpu/drm/udl/udl_main.c | 338 |
1 files changed, 338 insertions, 0 deletions
diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c new file mode 100644 index 00000000000..a8d5f09428c --- /dev/null +++ b/drivers/gpu/drm/udl/udl_main.c @@ -0,0 +1,338 @@ +/* + * Copyright (C) 2012 Red Hat + * + * based in parts on udlfb.c: + * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it> + * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com> + * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com> + * + * This file is subject to the terms and conditions of the GNU General Public + * License v2. See the file COPYING in the main directory of this archive for + * more details. + */ +#include "drmP.h" +#include "udl_drv.h" + +/* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */ +#define BULK_SIZE 512 + +#define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE) +#define WRITES_IN_FLIGHT (4) +#define MAX_VENDOR_DESCRIPTOR_SIZE 256 + +#define GET_URB_TIMEOUT HZ +#define FREE_URB_TIMEOUT (HZ*2) + +static int udl_parse_vendor_descriptor(struct drm_device *dev, + struct usb_device *usbdev) +{ + struct udl_device *udl = dev->dev_private; + char *desc; + char *buf; + char *desc_end; + + u8 total_len = 0; + + buf = kzalloc(MAX_VENDOR_DESCRIPTOR_SIZE, GFP_KERNEL); + if (!buf) + return false; + desc = buf; + + total_len = usb_get_descriptor(usbdev, 0x5f, /* vendor specific */ + 0, desc, MAX_VENDOR_DESCRIPTOR_SIZE); + if (total_len > 5) { + DRM_INFO("vendor descriptor length:%x data:%02x %02x %02x %02x" \ + "%02x %02x %02x %02x %02x %02x %02x\n", + total_len, desc[0], + desc[1], desc[2], desc[3], desc[4], desc[5], desc[6], + desc[7], desc[8], desc[9], desc[10]); + + if ((desc[0] != total_len) || /* descriptor length */ + (desc[1] != 0x5f) || /* vendor descriptor type */ + (desc[2] != 0x01) || /* version (2 bytes) */ + (desc[3] != 0x00) || + (desc[4] != total_len - 2)) /* length after type */ + goto unrecognized; + + desc_end = desc + total_len; + desc += 5; /* the fixed header we've already parsed */ + + while (desc < desc_end) { + u8 length; + u16 key; + + key = *((u16 *) desc); + desc += sizeof(u16); + length = *desc; + desc++; + + switch (key) { + case 0x0200: { /* max_area */ + u32 max_area; + max_area = le32_to_cpu(*((u32 *)desc)); + DRM_DEBUG("DL chip limited to %d pixel modes\n", + max_area); + udl->sku_pixel_limit = max_area; + break; + } + default: + break; + } + desc += length; + } + } + + goto success; + +unrecognized: + /* allow udlfb to load for now even if firmware unrecognized */ + DRM_ERROR("Unrecognized vendor firmware descriptor\n"); + +success: + kfree(buf); + return true; +} + +static void udl_release_urb_work(struct work_struct *work) +{ + struct urb_node *unode = container_of(work, struct urb_node, + release_urb_work.work); + + up(&unode->dev->urbs.limit_sem); +} + +void udl_urb_completion(struct urb *urb) +{ + struct urb_node *unode = urb->context; + struct udl_device *udl = unode->dev; + unsigned long flags; + + /* sync/async unlink faults aren't errors */ + if (urb->status) { + if (!(urb->status == -ENOENT || + urb->status == -ECONNRESET || + urb->status == -ESHUTDOWN)) { + DRM_ERROR("%s - nonzero write bulk status received: %d\n", + __func__, urb->status); + atomic_set(&udl->lost_pixels, 1); + } + } + + urb->transfer_buffer_length = udl->urbs.size; /* reset to actual */ + + spin_lock_irqsave(&udl->urbs.lock, flags); + list_add_tail(&unode->entry, &udl->urbs.list); + udl->urbs.available++; + spin_unlock_irqrestore(&udl->urbs.lock, flags); + +#if 0 + /* + * When using fb_defio, we deadlock if up() is called + * while another is waiting. So queue to another process. + */ + if (fb_defio) + schedule_delayed_work(&unode->release_urb_work, 0); + else +#endif + up(&udl->urbs.limit_sem); +} + +static void udl_free_urb_list(struct drm_device *dev) +{ + struct udl_device *udl = dev->dev_private; + int count = udl->urbs.count; + struct list_head *node; + struct urb_node *unode; + struct urb *urb; + int ret; + unsigned long flags; + + DRM_DEBUG("Waiting for completes and freeing all render urbs\n"); + + /* keep waiting and freeing, until we've got 'em all */ + while (count--) { + + /* Getting interrupted means a leak, but ok at shutdown*/ + ret = down_interruptible(&udl->urbs.limit_sem); + if (ret) + break; + + spin_lock_irqsave(&udl->urbs.lock, flags); + + node = udl->urbs.list.next; /* have reserved one with sem */ + list_del_init(node); + + spin_unlock_irqrestore(&udl->urbs.lock, flags); + + unode = list_entry(node, struct urb_node, entry); + urb = unode->urb; + + /* Free each separately allocated piece */ + usb_free_coherent(urb->dev, udl->urbs.size, + urb->transfer_buffer, urb->transfer_dma); + usb_free_urb(urb); + kfree(node); + } + udl->urbs.count = 0; +} + +static int udl_alloc_urb_list(struct drm_device *dev, int count, size_t size) +{ + struct udl_device *udl = dev->dev_private; + int i = 0; + struct urb *urb; + struct urb_node *unode; + char *buf; + + spin_lock_init(&udl->urbs.lock); + + udl->urbs.size = size; + INIT_LIST_HEAD(&udl->urbs.list); + + while (i < count) { + unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL); + if (!unode) + break; + unode->dev = udl; + + INIT_DELAYED_WORK(&unode->release_urb_work, + udl_release_urb_work); + + urb = usb_alloc_urb(0, GFP_KERNEL); + if (!urb) { + kfree(unode); + break; + } + unode->urb = urb; + + buf = usb_alloc_coherent(udl->ddev->usbdev, MAX_TRANSFER, GFP_KERNEL, + &urb->transfer_dma); + if (!buf) { + kfree(unode); + usb_free_urb(urb); + break; + } + + /* urb->transfer_buffer_length set to actual before submit */ + usb_fill_bulk_urb(urb, udl->ddev->usbdev, usb_sndbulkpipe(udl->ddev->usbdev, 1), + buf, size, udl_urb_completion, unode); + urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + list_add_tail(&unode->entry, &udl->urbs.list); + + i++; + } + + sema_init(&udl->urbs.limit_sem, i); + udl->urbs.count = i; + udl->urbs.available = i; + + DRM_DEBUG("allocated %d %d byte urbs\n", i, (int) size); + + return i; +} + +struct urb *udl_get_urb(struct drm_device *dev) +{ + struct udl_device *udl = dev->dev_private; + int ret = 0; + struct list_head *entry; + struct urb_node *unode; + struct urb *urb = NULL; + unsigned long flags; + + /* Wait for an in-flight buffer to complete and get re-queued */ + ret = down_timeout(&udl->urbs.limit_sem, GET_URB_TIMEOUT); + if (ret) { + atomic_set(&udl->lost_pixels, 1); + DRM_INFO("wait for urb interrupted: %x available: %d\n", + ret, udl->urbs.available); + goto error; + } + + spin_lock_irqsave(&udl->urbs.lock, flags); + + BUG_ON(list_empty(&udl->urbs.list)); /* reserved one with limit_sem */ + entry = udl->urbs.list.next; + list_del_init(entry); + udl->urbs.available--; + + spin_unlock_irqrestore(&udl->urbs.lock, flags); + + unode = list_entry(entry, struct urb_node, entry); + urb = unode->urb; + +error: + return urb; +} + +int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len) +{ + struct udl_device *udl = dev->dev_private; + int ret; + + BUG_ON(len > udl->urbs.size); + + urb->transfer_buffer_length = len; /* set to actual payload len */ + ret = usb_submit_urb(urb, GFP_ATOMIC); + if (ret) { + udl_urb_completion(urb); /* because no one else will */ + atomic_set(&udl->lost_pixels, 1); + DRM_ERROR("usb_submit_urb error %x\n", ret); + } + return ret; +} + +int udl_driver_load(struct drm_device *dev, unsigned long flags) +{ + struct udl_device *udl; + int ret; + + DRM_DEBUG("\n"); + udl = kzalloc(sizeof(struct udl_device), GFP_KERNEL); + if (!udl) + return -ENOMEM; + + udl->ddev = dev; + dev->dev_private = udl; + + if (!udl_parse_vendor_descriptor(dev, dev->usbdev)) { + DRM_ERROR("firmware not recognized. Assume incompatible device\n"); + goto err; + } + + if (!udl_alloc_urb_list(dev, WRITES_IN_FLIGHT, MAX_TRANSFER)) { + ret = -ENOMEM; + DRM_ERROR("udl_alloc_urb_list failed\n"); + goto err; + } + + DRM_DEBUG("\n"); + ret = udl_modeset_init(dev); + + ret = udl_fbdev_init(dev); + return 0; +err: + kfree(udl); + DRM_ERROR("%d\n", ret); + return ret; +} + +int udl_drop_usb(struct drm_device *dev) +{ + udl_free_urb_list(dev); + return 0; +} + +int udl_driver_unload(struct drm_device *dev) +{ + struct udl_device *udl = dev->dev_private; + + if (udl->urbs.count) + udl_free_urb_list(dev); + + udl_fbdev_cleanup(dev); + udl_modeset_cleanup(dev); + kfree(udl); + return 0; +} |