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![Daniel Vetter](/assets/img/avatar_default.png)
We already have a fallback in place to fill out the unique from dev->unique, which is set to something reasonable in drm_dev_alloc. Which means we only need to have a special set_busid for pci devices, to be able to care the backwards compat code for drm 1.1 around, which libdrm still needs. While developing and testing this patch things blew up in really interesting ways, and the code is rather confusing in naming things between the kernel code, ioctl #defines and libdrm. For the next brave dragon slayer, document all this madness properly in the userspace interface section of gpu.tmpl. v2: Make drm_dev_set_unique static and update kerneldoc. v3: Entire rewrite, plus document what's going on for posterity in the gpu docbook uapi section. v4: Drop accidental amdgpu hunk (Emil). v5: Drop accidental omapdrm vblank counter change (Emil). v6: Rebase on top of the sphinx conversion. Cc: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Cc: Emil Velikov <emil.l.velikov@gmail.com> Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> (virt_gpu) Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
358 lines
8.7 KiB
C
358 lines
8.7 KiB
C
/*
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* Copyright (C) 2012 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/module.h>
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#include <linux/of_graph.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_of.h>
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#include "armada_crtc.h"
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#include "armada_drm.h"
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#include "armada_gem.h"
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#include "armada_hw.h"
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#include <drm/armada_drm.h>
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#include "armada_ioctlP.h"
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static void armada_drm_unref_work(struct work_struct *work)
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{
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struct armada_private *priv =
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container_of(work, struct armada_private, fb_unref_work);
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struct drm_framebuffer *fb;
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while (kfifo_get(&priv->fb_unref, &fb))
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drm_framebuffer_unreference(fb);
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}
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/* Must be called with dev->event_lock held */
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void __armada_drm_queue_unref_work(struct drm_device *dev,
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struct drm_framebuffer *fb)
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{
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struct armada_private *priv = dev->dev_private;
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WARN_ON(!kfifo_put(&priv->fb_unref, fb));
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schedule_work(&priv->fb_unref_work);
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}
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void armada_drm_queue_unref_work(struct drm_device *dev,
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struct drm_framebuffer *fb)
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{
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unsigned long flags;
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spin_lock_irqsave(&dev->event_lock, flags);
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__armada_drm_queue_unref_work(dev, fb);
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spin_unlock_irqrestore(&dev->event_lock, flags);
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}
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static int armada_drm_load(struct drm_device *dev, unsigned long flags)
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{
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struct armada_private *priv;
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struct resource *mem = NULL;
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int ret, n;
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for (n = 0; ; n++) {
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struct resource *r = platform_get_resource(dev->platformdev,
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IORESOURCE_MEM, n);
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if (!r)
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break;
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/* Resources above 64K are graphics memory */
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if (resource_size(r) > SZ_64K)
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mem = r;
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else
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return -EINVAL;
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}
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if (!mem)
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return -ENXIO;
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if (!devm_request_mem_region(dev->dev, mem->start,
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resource_size(mem), "armada-drm"))
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return -EBUSY;
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priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv) {
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DRM_ERROR("failed to allocate private\n");
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return -ENOMEM;
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}
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platform_set_drvdata(dev->platformdev, dev);
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dev->dev_private = priv;
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INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
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INIT_KFIFO(priv->fb_unref);
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/* Mode setting support */
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drm_mode_config_init(dev);
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dev->mode_config.min_width = 320;
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dev->mode_config.min_height = 200;
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/*
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* With vscale enabled, the maximum width is 1920 due to the
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* 1920 by 3 lines RAM
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*/
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dev->mode_config.max_width = 1920;
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dev->mode_config.max_height = 2048;
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dev->mode_config.preferred_depth = 24;
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dev->mode_config.funcs = &armada_drm_mode_config_funcs;
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drm_mm_init(&priv->linear, mem->start, resource_size(mem));
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mutex_init(&priv->linear_lock);
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ret = component_bind_all(dev->dev, dev);
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if (ret)
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goto err_kms;
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ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
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if (ret)
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goto err_comp;
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dev->irq_enabled = true;
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ret = armada_fbdev_init(dev);
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if (ret)
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goto err_comp;
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drm_kms_helper_poll_init(dev);
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return 0;
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err_comp:
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component_unbind_all(dev->dev, dev);
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err_kms:
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drm_mode_config_cleanup(dev);
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drm_mm_takedown(&priv->linear);
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flush_work(&priv->fb_unref_work);
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return ret;
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}
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static int armada_drm_unload(struct drm_device *dev)
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{
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struct armada_private *priv = dev->dev_private;
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drm_kms_helper_poll_fini(dev);
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armada_fbdev_fini(dev);
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component_unbind_all(dev->dev, dev);
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drm_mode_config_cleanup(dev);
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drm_mm_takedown(&priv->linear);
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flush_work(&priv->fb_unref_work);
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dev->dev_private = NULL;
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return 0;
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}
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/* These are called under the vbl_lock. */
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static int armada_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
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{
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struct armada_private *priv = dev->dev_private;
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armada_drm_crtc_enable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
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return 0;
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}
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static void armada_drm_disable_vblank(struct drm_device *dev, unsigned int pipe)
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{
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struct armada_private *priv = dev->dev_private;
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armada_drm_crtc_disable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
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}
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static struct drm_ioctl_desc armada_ioctls[] = {
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DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
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DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
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DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
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};
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static void armada_drm_lastclose(struct drm_device *dev)
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{
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armada_fbdev_lastclose(dev);
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}
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static const struct file_operations armada_drm_fops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.read = drm_read,
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.poll = drm_poll,
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.unlocked_ioctl = drm_ioctl,
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.mmap = drm_gem_mmap,
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.open = drm_open,
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.release = drm_release,
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};
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static struct drm_driver armada_drm_driver = {
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.load = armada_drm_load,
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.lastclose = armada_drm_lastclose,
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.unload = armada_drm_unload,
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.get_vblank_counter = drm_vblank_no_hw_counter,
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.enable_vblank = armada_drm_enable_vblank,
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.disable_vblank = armada_drm_disable_vblank,
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#ifdef CONFIG_DEBUG_FS
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.debugfs_init = armada_drm_debugfs_init,
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.debugfs_cleanup = armada_drm_debugfs_cleanup,
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#endif
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.gem_free_object_unlocked = armada_gem_free_object,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_export = armada_gem_prime_export,
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.gem_prime_import = armada_gem_prime_import,
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.dumb_create = armada_gem_dumb_create,
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.dumb_map_offset = armada_gem_dumb_map_offset,
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.dumb_destroy = armada_gem_dumb_destroy,
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.gem_vm_ops = &armada_gem_vm_ops,
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.major = 1,
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.minor = 0,
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.name = "armada-drm",
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.desc = "Armada SoC DRM",
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.date = "20120730",
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.driver_features = DRIVER_GEM | DRIVER_MODESET |
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DRIVER_HAVE_IRQ | DRIVER_PRIME,
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.ioctls = armada_ioctls,
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.fops = &armada_drm_fops,
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};
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static int armada_drm_bind(struct device *dev)
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{
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return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
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}
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static void armada_drm_unbind(struct device *dev)
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{
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drm_put_dev(dev_get_drvdata(dev));
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}
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static int compare_of(struct device *dev, void *data)
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{
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return dev->of_node == data;
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}
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static int compare_dev_name(struct device *dev, void *data)
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{
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const char *name = data;
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return !strcmp(dev_name(dev), name);
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}
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static void armada_add_endpoints(struct device *dev,
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struct component_match **match, struct device_node *port)
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{
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struct device_node *ep, *remote;
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for_each_child_of_node(port, ep) {
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remote = of_graph_get_remote_port_parent(ep);
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if (!remote || !of_device_is_available(remote)) {
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of_node_put(remote);
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continue;
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} else if (!of_device_is_available(remote->parent)) {
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dev_warn(dev, "parent device of %s is not available\n",
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remote->full_name);
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of_node_put(remote);
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continue;
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}
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component_match_add(dev, match, compare_of, remote);
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of_node_put(remote);
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}
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}
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static const struct component_master_ops armada_master_ops = {
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.bind = armada_drm_bind,
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.unbind = armada_drm_unbind,
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};
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static int armada_drm_probe(struct platform_device *pdev)
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{
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struct component_match *match = NULL;
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struct device *dev = &pdev->dev;
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int ret;
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ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
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if (ret != -EINVAL)
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return ret;
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if (dev->platform_data) {
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char **devices = dev->platform_data;
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struct device_node *port;
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struct device *d;
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int i;
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for (i = 0; devices[i]; i++)
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component_match_add(dev, &match, compare_dev_name,
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devices[i]);
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if (i == 0) {
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dev_err(dev, "missing 'ports' property\n");
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return -ENODEV;
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}
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for (i = 0; devices[i]; i++) {
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d = bus_find_device_by_name(&platform_bus_type, NULL,
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devices[i]);
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if (d && d->of_node) {
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for_each_child_of_node(d->of_node, port)
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armada_add_endpoints(dev, &match, port);
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}
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put_device(d);
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}
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}
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return component_master_add_with_match(&pdev->dev, &armada_master_ops,
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match);
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}
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static int armada_drm_remove(struct platform_device *pdev)
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{
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component_master_del(&pdev->dev, &armada_master_ops);
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return 0;
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}
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static const struct platform_device_id armada_drm_platform_ids[] = {
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{
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.name = "armada-drm",
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}, {
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.name = "armada-510-drm",
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},
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{ },
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};
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MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
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static struct platform_driver armada_drm_platform_driver = {
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.probe = armada_drm_probe,
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.remove = armada_drm_remove,
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.driver = {
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.name = "armada-drm",
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},
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.id_table = armada_drm_platform_ids,
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};
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static int __init armada_drm_init(void)
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{
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int ret;
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armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
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ret = platform_driver_register(&armada_lcd_platform_driver);
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if (ret)
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return ret;
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ret = platform_driver_register(&armada_drm_platform_driver);
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if (ret)
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platform_driver_unregister(&armada_lcd_platform_driver);
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return ret;
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}
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module_init(armada_drm_init);
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static void __exit armada_drm_exit(void)
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{
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platform_driver_unregister(&armada_drm_platform_driver);
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platform_driver_unregister(&armada_lcd_platform_driver);
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}
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module_exit(armada_drm_exit);
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MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
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MODULE_DESCRIPTION("Armada DRM Driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:armada-drm");
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