Re: [PATCH RESEND] drm/bridge: anx7625: Use common macros for DP power sequencing commands

[Jani Nikula <jani.nikula@linux.intel.com>]

On Mon, 10 Jul 2023, Chen-Yu Tsai <wenst@chromium.org> wrote:
> The DRM DP code has macros for the DP power sequencing commands. Use
> them in the anx7625 driver instead of raw numbers.
>
> Fixes: 548b512e144f ("drm/bridge: anx7625: send DPCD command to downstream")
> Fixes: 27f26359de9b ("drm/bridge: anx7625: Set downstream sink into normal status")
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> ---
> Collected tags and rebased on v6.5-rc1.
>
>  drivers/gpu/drm/bridge/analogix/anx7625.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> index 8b985efdc086..9db3784cb554 100644
> --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> @@ -931,8 +931,8 @@ static void anx7625_dp_start(struct anx7625_data *ctx)
>  
>  	dev_dbg(dev, "set downstream sink into normal\n");
>  	/* Downstream sink enter into normal mode */
> -	data = 1;
> -	ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, 0x000600, 1, &data);
> +	data = DP_SET_POWER_D0;
> +	ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, DP_SET_POWER, 1, &data);

So you have code to implement the drm dp aux abstractions, why aren't
you using drm_dp_dpcd_writeb() and friends here?

BR,
Jani.


>  	if (ret < 0)
>  		dev_err(dev, "IO error : set sink into normal mode fail\n");
>  
> @@ -971,8 +971,8 @@ static void anx7625_dp_stop(struct anx7625_data *ctx)
>  
>  	dev_dbg(dev, "notify downstream enter into standby\n");
>  	/* Downstream monitor enter into standby mode */
> -	data = 2;
> -	ret |= anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, 0x000600, 1, &data);
> +	data = DP_SET_POWER_D3;
> +	ret |= anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, DP_SET_POWER, 1, &data);
>  	if (ret < 0)
>  		DRM_DEV_ERROR(dev, "IO error : mute video fail\n");

-- 
Jani Nikula, Intel Open Source Graphics Center