3e99a6b956
The AGP_INTEL driver provides an interface for very old userspace to control the GART (though the GART itself was only ever emulated on Intel systems). The pci bridge discovery code is also used by the i915.ko driver to set up the GTT on old systems, but it does not require the old userspace interface. When i915.ko selects the old interface, it binds another user to the core GTT routines, and in particular creates a second reference to the scratch pages allocated. This hinders resource leak debugging for when we unload i915.ko as we want to assert that all DMA pages have been released, but we appear to leak because of the secondary interface which persists after i915.ko unloads. All i915.ko users do not require the old /dev/agpgart interface so stop selecting it and simplify our debugging by dropping the historical baggage. Note that by selecting AGP=n it was already possible to unselect AGP_INTEL. But since we've dropped support for any of the AGP stuff long ago there's really no point for this any more. Also note that we still need INTEL_GTT, which is the underlying, shared, driver for the graphics GART on gen1-5. v2: Entirely new commit message (Chris, Ville). Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1453901881-26425-2-git-send-email-daniel.vetter@ffwll.ch
48 lines
1.8 KiB
Plaintext
48 lines
1.8 KiB
Plaintext
config DRM_I915
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tristate "Intel 8xx/9xx/G3x/G4x/HD Graphics"
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depends on DRM
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depends on X86 && PCI
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select INTEL_GTT
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select INTERVAL_TREE
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# we need shmfs for the swappable backing store, and in particular
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# the shmem_readpage() which depends upon tmpfs
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select SHMEM
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select TMPFS
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select DRM_KMS_HELPER
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select DRM_PANEL
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select DRM_MIPI_DSI
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# i915 depends on ACPI_VIDEO when ACPI is enabled
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# but for select to work, need to select ACPI_VIDEO's dependencies, ick
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select BACKLIGHT_LCD_SUPPORT if ACPI
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select BACKLIGHT_CLASS_DEVICE if ACPI
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select INPUT if ACPI
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select ACPI_VIDEO if ACPI
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select ACPI_BUTTON if ACPI
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help
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Choose this option if you have a system that has "Intel Graphics
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Media Accelerator" or "HD Graphics" integrated graphics,
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including 830M, 845G, 852GM, 855GM, 865G, 915G, 945G, 965G,
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G35, G41, G43, G45 chipsets and Celeron, Pentium, Core i3,
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Core i5, Core i7 as well as Atom CPUs with integrated graphics.
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If M is selected, the module will be called i915. AGP support
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is required for this driver to work. This driver is used by
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the Intel driver in X.org 6.8 and XFree86 4.4 and above. It
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replaces the older i830 module that supported a subset of the
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hardware in older X.org releases.
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Note that the older i810/i815 chipsets require the use of the
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i810 driver instead, and the Atom z5xx series has an entirely
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different implementation.
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config DRM_I915_PRELIMINARY_HW_SUPPORT
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bool "Enable preliminary support for prerelease Intel hardware by default"
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depends on DRM_I915
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default n
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help
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Choose this option if you have prerelease Intel hardware and want the
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i915 driver to support it by default. You can enable such support at
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runtime with the module option i915.preliminary_hw_support=1; this
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option changes the default for that module option.
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If in doubt, say "N".
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