[Nouveau] [RFC PATCH 09/29] clk: Set clocks to pre suspend state after suspend

[Pierre Moreau]

Reviewed-by: Pierre Moreau <pierre.morrow at free.fr>

On 2017-09-15 — 17:11, Karol Herbst wrote:
> The idea is to clear out the saved state, because after a resume we can't
> know what the GPU is clocked to. The reclock is triggered by the call to
> nvkm_clk_update later in nvkm_clk_init.
> 
> v2: convert to C style comments
> 
> Signed-off-by: Karol Herbst <karolherbst at gmail.com>
> Reviewed-by: Martin Peres <martin.peres at free.fr>
> ---
>  drm/nouveau/nvkm/subdev/clk/base.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drm/nouveau/nvkm/subdev/clk/base.c b/drm/nouveau/nvkm/subdev/clk/base.c
> index 1d71bf09..54188d2b 100644
> --- a/drm/nouveau/nvkm/subdev/clk/base.c
> +++ b/drm/nouveau/nvkm/subdev/clk/base.c
> @@ -625,11 +625,10 @@ nvkm_clk_init(struct nvkm_subdev *subdev)
>  	if (clk->func->init)
>  		return clk->func->init(clk);
>  
> -	clk->astate = NVKM_CLK_PSTATE_DEFAULT;
> +	/* after a resume we have no idea what clocks are set, reset the state
> +	 */
>  	clk->pstate = NULL;
> -	clk->exp_cstateid = NVKM_CLK_CSTATE_DEFAULT;
>  	clk->cstate = NULL;
> -	clk->temp = 90; /* reasonable default value */
>  	nvkm_clk_update(clk, true);
>  	return 0;
>  }
> @@ -683,8 +682,13 @@ nvkm_clk_ctor(const struct nvkm_clk_func *func, struct nvkm_device *device,
>  	clk->func = func;
>  	INIT_LIST_HEAD(&clk->states);
>  	clk->domains = func->domains;
> +
> +	clk->astate = NVKM_CLK_PSTATE_DEFAULT;
>  	clk->ustate_ac = -1;
>  	clk->ustate_dc = -1;
> +	clk->exp_cstateid = NVKM_CLK_CSTATE_DEFAULT;
> +	clk->temp = 90; /* reasonable default value */
> +
>  	clk->allow_reclock = allow_reclock;
>  
>  	INIT_WORK(&clk->work, nvkm_clk_update_work);
> -- 
> 2.14.1
> 
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