1config DRM_RADEON_KMS
 2	bool "Enable modesetting on radeon by default - NEW DRIVER"
 3	depends on DRM_RADEON
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 4	select BACKLIGHT_CLASS_DEVICE
 
 
 
 
 
 
 
 
 
 
 5	help
 6	  Choose this option if you want kernel modesetting enabled by default.
 7
 8	  This is a completely new driver. It's only part of the existing drm
 9	  for compatibility reasons. It requires an entirely different graphics
10	  stack above it and works very differently from the old drm stack.
11	  i.e. don't enable this unless you know what you are doing it may
12	  cause issues or bugs compared to the previous userspace driver stack.
13
14	  When kernel modesetting is enabled the IOCTL of radeon/drm
15	  driver are considered as invalid and an error message is printed
16	  in the log and they return failure.
17
18	  KMS enabled userspace will use new API to talk with the radeon/drm
19	  driver. The new API provide functions to create/destroy/share/mmap
20	  buffer object which are then managed by the kernel memory manager
21	  (here TTM). In order to submit command to the GPU the userspace
22	  provide a buffer holding the command stream, along this buffer
23	  userspace have to provide a list of buffer object used by the
24	  command stream. The kernel radeon driver will then place buffer
25	  in GPU accessible memory and will update command stream to reflect
26	  the position of the different buffers.
27
28	  The kernel will also perform security check on command stream
29	  provided by the user, we want to catch and forbid any illegal use
30	  of the GPU such as DMA into random system memory or into memory
31	  not owned by the process supplying the command stream.

 1# SPDX-License-Identifier: MIT
 2
 3config DRM_RADEON
 4	tristate "ATI Radeon"
 5	depends on DRM && PCI && MMU
 6	depends on AGP || !AGP
 7	select FW_LOADER
 8	select DRM_DISPLAY_DP_HELPER
 9	select DRM_DISPLAY_HELPER
10        select DRM_KMS_HELPER
11	select DRM_SUBALLOC_HELPER
12        select DRM_TTM
13	select DRM_TTM_HELPER
14	select FB_IOMEM_HELPERS if DRM_FBDEV_EMULATION
15	select SND_HDA_COMPONENT if SND_HDA_CORE
16	select POWER_SUPPLY
17	select HWMON
18	select BACKLIGHT_CLASS_DEVICE
19	select INTERVAL_TREE
20	select I2C
21	select I2C_ALGOBIT
22	# radeon depends on ACPI_VIDEO when ACPI is enabled, for select to work
23	# ACPI_VIDEO's dependencies must also be selected.
24	select INPUT if ACPI
25	select ACPI_VIDEO if ACPI
26	# On x86 ACPI_VIDEO also needs ACPI_WMI
27	select X86_PLATFORM_DEVICES if ACPI && X86
28	select ACPI_WMI if ACPI && X86
29	help
30	  Choose this option if you have an ATI Radeon graphics card.  There
31	  are both PCI and AGP versions.  You don't need to choose this to
32	  run the Radeon in plain VGA mode.
 
 
 
 
33
34	  If M is selected, the module will be called radeon.
 
 
35
36config DRM_RADEON_USERPTR
37	bool "Always enable userptr support"
38	depends on DRM_RADEON
39	select MMU_NOTIFIER
40	help
41	  This option selects CONFIG_MMU_NOTIFIER if it isn't already
42	  selected to enabled full userptr support.