diff options
| author | Michel Dänzer <michel@tungstengraphics.com> | 2006-08-07 12:33:57 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2006-09-21 21:32:30 +0200 |
| commit | 8624ecbf68e90e5a8124514a0b7f92767fb80a62 (patch) | |
| tree | b0de0beb4e43e567f6e09a4dae08a9fb0ad494ec /drivers/char/drm/radeon_state.c | |
| parent | drm: radeon: add some debug output when getparam is called with unknown (diff) | |
| download | linux-8624ecbf68e90e5a8124514a0b7f92767fb80a62.tar.xz linux-8624ecbf68e90e5a8124514a0b7f92767fb80a62.zip | |
drm: radeon: implement RADEON_PARAM_SCRATCH_OFFSET getparam
When this succeeds, userspace can read the scratch register contents from th mapped writeback page directly.
Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers/char/drm/radeon_state.c')
| -rw-r--r-- | drivers/char/drm/radeon_state.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/char/drm/radeon_state.c b/drivers/char/drm/radeon_state.c index 99589fe0032f..0433ff80cb70 100644 --- a/drivers/char/drm/radeon_state.c +++ b/drivers/char/drm/radeon_state.c @@ -2987,7 +2987,11 @@ static int radeon_cp_getparam(DRM_IOCTL_ARGS) case RADEON_PARAM_GART_TEX_HANDLE: value = dev_priv->gart_textures_offset; break; - + case RADEON_PARAM_SCRATCH_OFFSET: + if (!dev_priv->writeback_works) + return DRM_ERR(EINVAL); + value = RADEON_SCRATCH_REG_OFFSET; + break; case RADEON_PARAM_CARD_TYPE: if (dev_priv->flags & CHIP_IS_PCIE) value = RADEON_CARD_PCIE; |