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authorJordan Crouse <jcrouse@codeaurora.org>2017-10-20 11:06:58 -0600
committerRob Clark <robdclark@gmail.com>2017-10-28 11:01:37 -0400
commita6e29a0eea3ccbf6fb8a908a3fc3e931f3ba2ae4 (patch)
treedd9789bd1000e707465b99c59d544d6d52eeb490
parentf97decac5f4c2d862e5b848694e3ffb29fc8acdd (diff)
drm/msm: Add a parameter query for the number of ringbuffers
In order to manage ringbuffer priority to its fullest userspace should know how many ringbuffers it has to work with. Add a parameter to return the number of active rings. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
-rw-r--r--drivers/gpu/drm/msm/adreno/adreno_gpu.c3
-rw-r--r--include/uapi/drm/msm_drm.h1
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index fd0fb0568dd3..4e9caf97b20f 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -57,6 +57,9 @@ int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value)
return ret;
}
return -EINVAL;
+ case MSM_PARAM_NR_RINGS:
+ *value = gpu->nr_rings;
+ return 0;
default:
DBG("%s: invalid param: %u", gpu->name, param);
return -EINVAL;
diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
index 12d7619afa22..bbbaffad772d 100644
--- a/include/uapi/drm/msm_drm.h
+++ b/include/uapi/drm/msm_drm.h
@@ -73,6 +73,7 @@ struct drm_msm_timespec {
#define MSM_PARAM_MAX_FREQ 0x04
#define MSM_PARAM_TIMESTAMP 0x05
#define MSM_PARAM_GMEM_BASE 0x06
+#define MSM_PARAM_NR_RINGS 0x07
struct drm_msm_param {
__u32 pipe; /* in, MSM_PIPE_x */

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