diff options
| author | Ben Widawsky <ben@bwidawsk.net> | 2013-05-28 19:22:17 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-05-31 20:54:08 +0200 |
| commit | 5586181fce2b2e89a0e281d78ffbdfa103bb0dde (patch) | |
| tree | ce5d6d12c1e7efbdb54334d56fcb50e10c73f955 /drivers/gpu/drm/i915/i915_reg.h | |
| parent | 40ccc72b84a848e6fcbdb38fe716f0ac6939609e (diff) | |
drm/i915: Comments for semaphore clarification
Semaphores are tied very closely to the rings in the GPU. Trivial patch
adds comments to the existing code so that when we add new rings we can
include comments there as well. It also helps distinguish the ring to
semaphore mailbox interactions by using the ringname in the semaphore
data structures.
This patch should have no functional impact.
v2: The English parts (as opposed to register names) of the comments
were reversed. (Damien)
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index dbd9de5abde..6579d0c0d2f 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -265,12 +265,12 @@ #define MI_SEMAPHORE_UPDATE (1<<21) #define MI_SEMAPHORE_COMPARE (1<<20) #define MI_SEMAPHORE_REGISTER (1<<18) -#define MI_SEMAPHORE_SYNC_RV (2<<16) -#define MI_SEMAPHORE_SYNC_RB (0<<16) -#define MI_SEMAPHORE_SYNC_VR (0<<16) -#define MI_SEMAPHORE_SYNC_VB (2<<16) -#define MI_SEMAPHORE_SYNC_BR (2<<16) -#define MI_SEMAPHORE_SYNC_BV (0<<16) +#define MI_SEMAPHORE_SYNC_RB (0<<16) /* BCS wait for RCS (BRSYNC) */ +#define MI_SEMAPHORE_SYNC_RV (2<<16) /* VCS wait for RCS (VRSYNC) */ +#define MI_SEMAPHORE_SYNC_VR (0<<16) /* RCS wait for VCS (RVSYNC) */ +#define MI_SEMAPHORE_SYNC_VB (2<<16) /* BCS wait for VCS (BVSYNC) */ +#define MI_SEMAPHORE_SYNC_BV (0<<16) /* VCS wait for BCS (VBSYNC) */ +#define MI_SEMAPHORE_SYNC_BR (2<<16) /* RCS wait for BCS (RBSYNC) */ #define MI_SEMAPHORE_SYNC_INVALID (1<<0) /* * 3D instructions used by the kernel |