[PATCH] amdgpu/dm: Don't use DRM_ERROR in amdgpu_dm_atomic_check

[Harry Wentland]

On 2017-11-09 12:38 PM, Michel Dänzer wrote:
> From: Michel Dänzer <michel.daenzer at amd.com>
> 
> The atomic_check hook is expected to fail in some cases, e.g. if the
> modeset operation requested by userspace cannot be performed, so it must
> not spam dmesg on failure.
> 
> Fixes spurious
> 
>  [drm:amdgpu_dm_atomic_check [amdgpu]] *ERROR* Atomic state validation failed with error :-35 !
> 
> error messages on DPMS off with CONFIG_DEBUG_WW_MUTEX_SLOWPATH enabled.
> 
> While we're at it, fix up the existing DRM_DEBUG_DRIVER strings.
> 
> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>

Reviewed-by: Harry Wentland <harry.wentland at amd.com>

Harry

> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 +++++-------
>  1 file changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index ccfbf14c0f09..ed8b7524b741 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -4691,10 +4691,8 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
>  	bool lock_and_validation_needed = false;
>  
>  	ret = drm_atomic_helper_check_modeset(dev, state);
> -	if (ret) {
> -		DRM_ERROR("Atomic state validation failed with error :%d !\n", ret);
> -		return ret;
> -	}
> +	if (ret)
> +		goto fail;
>  
>  	/*
>  	 * legacy_cursor_update should be made false for SoC's having
> @@ -4811,11 +4809,11 @@ static int amdgpu_dm_atomic_check(struct drm_device *dev,
>  
>  fail:
>  	if (ret == -EDEADLK)
> -		DRM_DEBUG_DRIVER("Atomic check stopped due to to deadlock.\n");
> +		DRM_DEBUG_DRIVER("Atomic check stopped to avoid deadlock.\n");
>  	else if (ret == -EINTR || ret == -EAGAIN || ret == -ERESTARTSYS)
> -		DRM_DEBUG_DRIVER("Atomic check stopped due to to signal.\n");
> +		DRM_DEBUG_DRIVER("Atomic check stopped due to signal.\n");
>  	else
> -		DRM_ERROR("Atomic check failed with err: %d \n", ret);
> +		DRM_DEBUG_DRIVER("Atomic check failed with err: %d \n", ret);
>  
>  	return ret;
>  }
>