[PATCH 258/459] drm/amd/powerplay: fix amdgpu_pm_info show gpu load error

Alex Deucher alexdeucher at gmail.com
Mon Jun 17 19:30:25 UTC 2019

From: Kevin Wang <kevin1.wang at amd.com>

due to the smu dma/RTOS restriction, the interval of catching smu
metric table should be more than 1ms. otherwise it will cause the gpu
activity data corruption.

Signed-off-by:Kevin Wang <kevin1.wang at amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
 drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
index 4851222c9919..5f697ed3796b 100644
--- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
@@ -816,6 +816,8 @@ static int navi10_get_current_activity_percent(struct smu_context *smu,
 	if (!value)
 		return -EINVAL;
+	msleep(1);
 	ret = smu_update_table(smu, SMU_TABLE_SMU_METRICS,
 			       (void *)&metrics, false);
 	if (ret)

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