drm/msm: add max-freq gpu param to uapi

We need this in userspace for interpreting some of the perf ctrs.

Note possibly not quite sufficient if we had some frequency mgmt
approach other than race-to-idle.  Not really sure what the best
thing to do if we did.  Although displaying results as a percentage
of max frequence seems sensible(ish) if we did.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index a3b54cc7649531c987ed9bd18ba6d2b7087bbe6f..0e1d0c57cd3d10e7a745e67df24adb0a09a3f2d5 100644 (file)
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -41,6 +41,9 @@ int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value)
                                (adreno_gpu->rev.major << 16) |
                                (adreno_gpu->rev.core << 24);
                return 0;
+       case MSM_PARAM_MAX_FREQ:
+               *value = adreno_gpu->base.fast_rate;
+               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 81e6e0d1d3600c8a90d83ce8f444a8106d28e546..0e3c4c48b326ff6a694e2d2fb197f1b4b22494f2 100644 (file)
--- a/include/uapi/drm/msm_drm.h
+++ b/include/uapi/drm/msm_drm.h
@@ -50,6 +50,7 @@ struct drm_msm_timespec {
 #define MSM_PARAM_GPU_ID     0x01
 #define MSM_PARAM_GMEM_SIZE  0x02
 #define MSM_PARAM_CHIP_ID    0x03
+#define MSM_PARAM_MAX_FREQ   0x04
 
 struct drm_msm_param {
        __u32 pipe;           /* in, MSM_PIPE_x */