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drm/msm: Add a parameter query for the number of ringbuffers

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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>
This commit is contained in:
Jordan Crouse 2017-10-20 11:06:58 -06:00 committed by Rob Clark
parent f97decac5f
commit a6e29a0eea
2 changed files with 4 additions and 0 deletions
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3
drivers/gpu/drm/msm/adreno/adreno_gpu.c
View File

@ -57,6 +57,9 @@ int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value)
return ret; return ret;
} }
return -EINVAL; return -EINVAL;
case MSM_PARAM_NR_RINGS:
*value = gpu->nr_rings;
return 0;
default: default:
DBG("%s: invalid param: %u", gpu->name, param); DBG("%s: invalid param: %u", gpu->name, param);
return -EINVAL; return -EINVAL;

1
include/uapi/drm/msm_drm.h
View File

@ -73,6 +73,7 @@ struct drm_msm_timespec {
#define MSM_PARAM_MAX_FREQ 0x04 #define MSM_PARAM_MAX_FREQ 0x04
#define MSM_PARAM_TIMESTAMP 0x05 #define MSM_PARAM_TIMESTAMP 0x05
#define MSM_PARAM_GMEM_BASE 0x06 #define MSM_PARAM_GMEM_BASE 0x06
#define MSM_PARAM_NR_RINGS 0x07
struct drm_msm_param { struct drm_msm_param {
__u32 pipe; /* in, MSM_PIPE_x */ __u32 pipe; /* in, MSM_PIPE_x */