drm/v3d: Make sure the GPU is on when measuring clocks. (935f3d88) · Commits · 戴 / test

You'll get garbage measurements if the registers always read back 0xdeadbeef Signed-off-by:

drivers/gpu/drm/v3d/v3d_debugfs.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -187,6 +187,11 @@ static int v3d_measure_clock(struct seq_file m, void unused)
		uint32_t cycles;
		int core = 0;
		int measure_ms = 1000;
		int ret;

		ret = pm_runtime_get_sync(v3d->dev);
		if (ret < 0)
		return ret;

		if (v3d->ver >= 40) {
		V3D_CORE_WRITE(core, V3D_V4_PCTR_0_SRC_0_3,
		@@ -210,6 +215,9 @@ static int v3d_measure_clock(struct seq_file m, void unused)
		cycles / (measure_ms * 1000),
		(cycles / (measure_ms * 100)) % 10);

		pm_runtime_mark_last_busy(v3d->dev);
		pm_runtime_put_autosuspend(v3d->dev);

		return 0;
		}