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| author | Rob Clark <robdclark@chromium.org> | 2022-02-24 14:23:21 -0800 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2022-03-04 22:49:52 -0800 |
| commit | 17154addc5c1a175bcf3441ff0d9598efa1f05cd (patch) | |
| tree | e4b4c3afed270e9734cc2f5930d470240cd0c852 /drivers/gpu/drm/msm/msm_drv.c | |
| parent | 5f9ffe89803387078c3b253970795fa7ed447f18 (diff) | |
| download | lwn-17154addc5c1a175bcf3441ff0d9598efa1f05cd.tar.gz lwn-17154addc5c1a175bcf3441ff0d9598efa1f05cd.zip | |
drm/msm: Add MSM_SUBMIT_FENCE_SN_IN
Add a way for userspace to specify the sequence number fence used to
track completion of the submit. As the seqno fence is simply an
incrementing counter which is local to the submitqueue, it is easy for
userspace to know the next value.
This is useful for native userspace drivers in a vm guest, as the guest
to host roundtrip can have high latency. Assigning the fence seqno in
the guest userspace allows the guest to continue without waiting for
response from the host.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Link: https://lore.kernel.org/r/20220224222321.60653-1-robdclark@gmail.com
Diffstat (limited to 'drivers/gpu/drm/msm/msm_drv.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_drv.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index a2834663dec4..e88c4b46a56f 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -41,9 +41,10 @@ * - 1.6.0 - Syncobj support * - 1.7.0 - Add MSM_PARAM_SUSPENDS to access suspend count * - 1.8.0 - Add MSM_BO_CACHED_COHERENT for supported GPUs (a6xx) + * - 1.9.0 - Add MSM_SUBMIT_FENCE_SN_IN */ #define MSM_VERSION_MAJOR 1 -#define MSM_VERSION_MINOR 8 +#define MSM_VERSION_MINOR 9 #define MSM_VERSION_PATCHLEVEL 0 static const struct drm_mode_config_funcs mode_config_funcs = { |