[PATCH 1/5] drm/msm: suspend devfreq on init

[Jordan Crouse]

On Thu, Aug 23, 2018 at 02:48:27PM +0530, Sharat Masetty wrote:
> 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.

Reviewed-by: Jordan Crouse <jcrouse at codeaurora.org>

> Signed-off-by: Sharat Masetty <smasetty at codeaurora.org>
> ---
>  drivers/gpu/drm/msm/msm_gpu.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
> index 5281a32..04f9604 100644
> --- a/drivers/gpu/drm/msm/msm_gpu.c
> +++ b/drivers/gpu/drm/msm/msm_gpu.c
> @@ -104,6 +104,8 @@ 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)
> -- 
> 1.9.1
> 

-- 
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project