linux-kernel - Re: [PATCH 1/3] drm/msm/dp: Reorganize code to avoid forward declaration

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Message-ID: <ddddcb1d-46c6-4903-3a8a-83bc96ece159@linaro.org>
Date:   Sat, 18 Jun 2022 01:50:16 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Stephen Boyd <swboyd@...omium.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc:     linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
        Sean Paul <sean@...rly.run>, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org,
        Kuogee Hsieh <quic_khsieh@...cinc.com>
Subject: Re: [PATCH 1/3] drm/msm/dp: Reorganize code to avoid forward
 declaration

On 17/06/2022 23:47, Stephen Boyd wrote:
> Let's move these functions around to avoid having to forward declare
> dp_ctrl_on_stream_phy_test_report(). Also remove
> dp_ctrl_reinitialize_mainlink() forward declaration because we're doing
> that sort of task.
> 
> Cc: Kuogee Hsieh <quic_khsieh@...cinc.com>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> ---
>   drivers/gpu/drm/msm/dp/dp_ctrl.c | 104 +++++++++++++++----------------
>   1 file changed, 50 insertions(+), 54 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
> index 703249384e7c..bd445e683cfc 100644
> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
> @@ -1238,8 +1238,6 @@ static int dp_ctrl_link_train_2(struct dp_ctrl_private *ctrl,
>   	return -ETIMEDOUT;
>   }
>   
> -static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl);
> -
>   static int dp_ctrl_link_train(struct dp_ctrl_private *ctrl,
>   			int *training_step)
>   {
> @@ -1534,38 +1532,6 @@ static int dp_ctrl_link_maintenance(struct dp_ctrl_private *ctrl)
>   	return ret;
>   }
>   
> -static int dp_ctrl_on_stream_phy_test_report(struct dp_ctrl *dp_ctrl);
> -
> -static int dp_ctrl_process_phy_test_request(struct dp_ctrl_private *ctrl)
> -{
> -	int ret = 0;
> -
> -	if (!ctrl->link->phy_params.phy_test_pattern_sel) {
> -		drm_dbg_dp(ctrl->drm_dev,
> -			"no test pattern selected by sink\n");
> -		return ret;
> -	}
> -
> -	/*
> -	 * The global reset will need DP link related clocks to be
> -	 * running. Add the global reset just before disabling the
> -	 * link clocks and core clocks.
> -	 */
> -	ret = dp_ctrl_off(&ctrl->dp_ctrl);
> -	if (ret) {
> -		DRM_ERROR("failed to disable DP controller\n");
> -		return ret;
> -	}
> -
> -	ret = dp_ctrl_on_link(&ctrl->dp_ctrl);
> -	if (!ret)
> -		ret = dp_ctrl_on_stream_phy_test_report(&ctrl->dp_ctrl);
> -	else
> -		DRM_ERROR("failed to enable DP link controller\n");
> -
> -	return ret;
> -}
> -
>   static bool dp_ctrl_send_phy_test_pattern(struct dp_ctrl_private *ctrl)
>   {
>   	bool success = false;
> @@ -1618,6 +1584,56 @@ static bool dp_ctrl_send_phy_test_pattern(struct dp_ctrl_private *ctrl)
>   	return success;
>   }
>   
> +static int dp_ctrl_on_stream_phy_test_report(struct dp_ctrl *dp_ctrl)
> +{
> +	int ret;
> +	struct dp_ctrl_private *ctrl;
> +
> +	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
> +
> +	ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
> +
> +	ret = dp_ctrl_enable_stream_clocks(ctrl);
> +	if (ret) {
> +		DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret);
> +		return ret;
> +	}
> +
> +	dp_ctrl_send_phy_test_pattern(ctrl);
> +
> +	return 0;
> +}
> +
> +static int dp_ctrl_process_phy_test_request(struct dp_ctrl_private *ctrl)
> +{
> +	int ret = 0;
> +
> +	if (!ctrl->link->phy_params.phy_test_pattern_sel) {
> +		drm_dbg_dp(ctrl->drm_dev,
> +			"no test pattern selected by sink\n");
> +		return ret;
> +	}
> +
> +	/*
> +	 * The global reset will need DP link related clocks to be
> +	 * running. Add the global reset just before disabling the
> +	 * link clocks and core clocks.
> +	 */
> +	ret = dp_ctrl_off(&ctrl->dp_ctrl);
> +	if (ret) {
> +		DRM_ERROR("failed to disable DP controller\n");
> +		return ret;
> +	}
> +
> +	ret = dp_ctrl_on_link(&ctrl->dp_ctrl);
> +	if (!ret)
> +		ret = dp_ctrl_on_stream_phy_test_report(&ctrl->dp_ctrl);
> +	else
> +		DRM_ERROR("failed to enable DP link controller\n");
> +
> +	return ret;
> +}
> +
>   void dp_ctrl_handle_sink_request(struct dp_ctrl *dp_ctrl)
>   {
>   	struct dp_ctrl_private *ctrl;
> @@ -1815,26 +1831,6 @@ static int dp_ctrl_link_retrain(struct dp_ctrl_private *ctrl)
>   	return dp_ctrl_setup_main_link(ctrl, &training_step);
>   }
>   
> -static int dp_ctrl_on_stream_phy_test_report(struct dp_ctrl *dp_ctrl)
> -{
> -	int ret;
> -	struct dp_ctrl_private *ctrl;
> -
> -	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
> -
> -	ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
> -
> -	ret = dp_ctrl_enable_stream_clocks(ctrl);
> -	if (ret) {
> -		DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret);
> -		return ret;
> -	}
> -
> -	dp_ctrl_send_phy_test_pattern(ctrl);
> -
> -	return 0;
> -}
> -
>   int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train)
>   {
>   	int ret = 0;


-- 
With best wishes
Dmitry