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

PATCH New Rob Clark 1 participant 1 message Feb 9, 2016

Subsystems (4)
DRM drivers DRM misc DRM driver for Qualcomm display hardware DRM driver for Qualcomm Adreno GPUs
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Rob Clark

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PATCH 1/1 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 <[email protected]>
---
 drivers/gpu/drm/msm/adreno/adreno_gpu.c | 3 +++
 include/uapi/drm/msm_drm.h              | 1 +
 2 files changed, 4 insertions(+)
drivers/gpu/drm/msm/adreno/adreno_gpu.c +3 -0
index a3b54cc..0e1d0c5 100644
@@ -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;
include/uapi/drm/msm_drm.h +1 -0
index 75a232b..f121624 100644
@@ -51,6 +51,7 @@ 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 */
Signature · 6 lines
2.5.0

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