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| author |   Samuel Li <samuel.li@amd.com> | 2013-04-08 17:25:47 -0400 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2013-04-09 10:31:31 -0400 |
| commit | a0a53aa8c7b491a43e2ef66786f9511bae8cbc35 (patch) | |
| tree | ba99c19682038634fece39989fef348baaebab1b /drivers/gpu/drm/radeon/radeon_kms.c | |
| parent | drm/radeon/dce6: add missing display reg for tiling setup (diff) | |
| download | linux-dev-a0a53aa8c7b491a43e2ef66786f9511bae8cbc35.tar.xz linux-dev-a0a53aa8c7b491a43e2ef66786f9511bae8cbc35.zip | |
drm/radeon: Use direct mapping for fast fb access on RS690
This patch allows the CPU to map the stolen vram segment
directly rather than going through the PCI BAR. This
significantly improves performance for certain workloads with
a properly patched ddx.
Use radeon.fastfb=1 to enable it (disabled by default).
Currently only supported on RS690, but support for RS780/880
and newer APUs may be added eventually.
Signed-off-by: Samuel Li <samuel.li@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_kms.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_kms.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c index c75cb2c6ba71..f5464482dee8 100644 --- a/drivers/gpu/drm/radeon/radeon_kms.c +++ b/drivers/gpu/drm/radeon/radeon_kms.c @@ -376,6 +376,9 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) else return -EINVAL; break; + case RADEON_INFO_FASTFB_WORKING: + value = rdev->fastfb_working; + break; default: DRM_DEBUG_KMS("Invalid request %d\n", info->request); return -EINVAL; |