diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/Kconfig')
| -rw-r--r-- | drivers/gpu/drm/radeon/Kconfig | 33 |
1 files changed, 5 insertions, 28 deletions
diff --git a/drivers/gpu/drm/radeon/Kconfig b/drivers/gpu/drm/radeon/Kconfig index ea92bbe3ed3..970f8e92dbb 100644 --- a/drivers/gpu/drm/radeon/Kconfig +++ b/drivers/gpu/drm/radeon/Kconfig @@ -1,31 +1,8 @@ -config DRM_RADEON_KMS - bool "Enable modesetting on radeon by default - NEW DRIVER" +config DRM_RADEON_UMS + bool "Enable userspace modesetting on radeon (DEPRECATED)" depends on DRM_RADEON - select BACKLIGHT_CLASS_DEVICE help - Choose this option if you want kernel modesetting enabled by default. + Choose this option if you still need userspace modesetting. - This is a completely new driver. It's only part of the existing drm - for compatibility reasons. It requires an entirely different graphics - stack above it and works very differently from the old drm stack. - i.e. don't enable this unless you know what you are doing it may - cause issues or bugs compared to the previous userspace driver stack. - - When kernel modesetting is enabled the IOCTL of radeon/drm - driver are considered as invalid and an error message is printed - in the log and they return failure. - - KMS enabled userspace will use new API to talk with the radeon/drm - driver. The new API provide functions to create/destroy/share/mmap - buffer object which are then managed by the kernel memory manager - (here TTM). In order to submit command to the GPU the userspace - provide a buffer holding the command stream, along this buffer - userspace have to provide a list of buffer object used by the - command stream. The kernel radeon driver will then place buffer - in GPU accessible memory and will update command stream to reflect - the position of the different buffers. - - The kernel will also perform security check on command stream - provided by the user, we want to catch and forbid any illegal use - of the GPU such as DMA into random system memory or into memory - not owned by the process supplying the command stream. + Userspace modesetting is deprecated for quite some time now, so + enable this only if you have ancient versions of the DDX drivers. |