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drm/i915: Split out load time MMIO initialization 

According to the new init phases scheme we should have a definite step
in the init sequence where MMIO access is setup, so move the
corresponding code to a separate function. This also has the benefit of
making the error path cleaner both in the new function and in
i915_driver_load()/unload().

No functional change.

Suggested by Chris.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1458128348-15730-16-git-send-email-imre.deak@intel.com
This commit is contained in:
Imre Deak 2016-03-16 13:39:04 +02:00
parent 5d7a6eefc3
commit f28cea45e5
1 changed files with 50 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

69
drivers/gpu/drm/i915/i915_dma.c
View File

@ -1050,6 +1050,50 @@ static void i915_mmio_cleanup(struct drm_device *dev)
pci_iounmap(dev->pdev, dev_priv->regs);
}
/**
* i915_driver_init_mmio - setup device MMIO
* @dev_priv: device private
*
* Setup minimal device state necessary for MMIO accesses later in the
* initialization sequence. The setup here should avoid any other device-wide
* side effects or exposing the driver via kernel internal or user space
* interfaces.
*/
static int i915_driver_init_mmio(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
int ret;
if (i915_get_bridge_dev(dev))
return -EIO;
ret = i915_mmio_setup(dev);
if (ret < 0)
goto put_bridge;
intel_uncore_init(dev);
return 0;
put_bridge:
pci_dev_put(dev_priv->bridge_dev);
return ret;
}
/**
* i915_driver_cleanup_mmio - cleanup the setup done in i915_driver_init_mmio()
* @dev_priv: device private
*/
static void i915_driver_cleanup_mmio(struct drm_i915_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
intel_uncore_fini(dev);
i915_mmio_cleanup(dev);
pci_dev_put(dev_priv->bridge_dev);
}
/**
* i915_driver_load - setup chip and create an initial config
* @dev: DRM device
@ -1081,22 +1125,15 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
intel_runtime_pm_get(dev_priv);
if (i915_get_bridge_dev(dev)) {
ret = -EIO;
goto out_runtime_pm_put;
}
ret = i915_mmio_setup(dev);
ret = i915_driver_init_mmio(dev_priv);
if (ret < 0)
goto put_bridge;
intel_uncore_init(dev);
goto out_runtime_pm_put;
intel_device_info_runtime_init(dev);
ret = i915_gem_gtt_init(dev);
if (ret)
goto out_uncore_fini;
goto out_cleanup_mmio;
/* WARNING: Apparently we must kick fbdev drivers before vgacon,
* otherwise the vga fbdev driver falls over. */
@ -1218,11 +1255,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
io_mapping_free(dev_priv->gtt.mappable);
out_gtt:
i915_global_gtt_cleanup(dev);
out_uncore_fini:
intel_uncore_fini(dev);
i915_mmio_cleanup(dev);
put_bridge:
pci_dev_put(dev_priv->bridge_dev);
out_cleanup_mmio:
i915_driver_cleanup_mmio(dev_priv);
out_runtime_pm_put:
intel_runtime_pm_put(dev_priv);
i915_driver_cleanup_early(dev_priv);
@ -1303,10 +1337,7 @@ int i915_driver_unload(struct drm_device *dev)
io_mapping_free(dev_priv->gtt.mappable);
i915_global_gtt_cleanup(dev);
intel_uncore_fini(dev);
i915_mmio_cleanup(dev);
pci_dev_put(dev_priv->bridge_dev);
i915_driver_cleanup_mmio(dev_priv);
intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);