drm/msm: suspend devfreq on init

Devfreq turns on and starts recommending power level as soon as it is
initialized. The GPU is still not powered on by the time the devfreq
init happens and this leads to problems on GPU's where register access
is needed to get/set power levels. So we start suspended and only restart
devfreq when GPU is powered on.

Signed-off-by: Sharat Masetty <smasetty@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 46e6b82f7b661082fdc7a1da6de22ee9f160323b..3378a9d5a2a2ef9f174653baa50bac60d2f2ca14 100644 (file)
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -105,6 +105,8 @@ static void msm_devfreq_init(struct msm_gpu *gpu)
                dev_err(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n");
                gpu->devfreq.devfreq = NULL;
        }
+
+       devfreq_suspend_device(gpu->devfreq.devfreq);
 }
 
 static int enable_pwrrail(struct msm_gpu *gpu)