freedreno: add support for FD_MAX_FREQ

Only msm backend supports this.  Sorry, if you are using kgsl, no
time-elapsed query for you.

Signed-off-by: Rob Clark <robclark@freedesktop.org>

freedreno/freedreno_drmif.h

@@ -50,6 +50,7 @@ enum fd_param_id {
 	FD_GMEM_SIZE,
 	FD_GPU_ID,
 	FD_CHIP_ID,
+	FD_MAX_FREQ,
 };
 
 /* bo flags: */

freedreno/kgsl/kgsl_pipe.c

@@ -50,6 +50,9 @@ static int kgsl_pipe_get_param(struct fd_pipe *pipe,
 	case FD_CHIP_ID:
 		*value = kgsl_pipe->devinfo.chip_id;
 		return 0;
+	case FD_MAX_FREQ:
+		/* unsupported on kgsl */
+		return -1;
 	default:
 		ERROR_MSG("invalid param id: %d", param);
 		return -1;

freedreno/msm/msm_pipe.c

@@ -67,6 +67,8 @@ static int msm_pipe_get_param(struct fd_pipe *pipe,
 	case FD_CHIP_ID:
 		*value = msm_pipe->chip_id;
 		return 0;
+	case FD_MAX_FREQ:
+		return query_param(pipe, MSM_PARAM_MAX_FREQ, value);
 	default:
 		ERROR_MSG("invalid param id: %d", param);
 		return -1;