Re: [PATCH v1 4/5] drm/msm/dp: move relevant dp initialization code from bind() to probe()

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

On 08/07/2023 02:52, Kuogee Hsieh wrote:
> In preparation of moving edp of_dp_aux_populate_bus() to
> dp_display_probe(), move dp_display_request_irq(),
> dp->parser->parse() and dp_power_client_init() to dp_display_probe()
> too.
> 
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
> ---
>   drivers/gpu/drm/msm/dp/dp_display.c | 48 +++++++++++++++++--------------------
>   drivers/gpu/drm/msm/dp/dp_display.h |  1 -
>   2 files changed, 22 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 44580c2..185f1eb 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -290,12 +290,6 @@ static int dp_display_bind(struct device *dev, struct device *master,
>   		goto end;
>   	}
>   
> -	rc = dp_power_client_init(dp->power);
> -	if (rc) {
> -		DRM_ERROR("Power client create failed\n");
> -		goto end;
> -	}
> -
>   	rc = dp_register_audio_driver(dev, dp->audio);
>   	if (rc) {
>   		DRM_ERROR("Audio registration Dp failed\n");
> @@ -752,6 +746,12 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
>   		goto error;
>   	}
>   
> +	rc = dp->parser->parse(dp->parser);
> +	if (rc) {
> +		DRM_ERROR("device tree parsing failed\n");
> +		goto error;
> +	}
> +
>   	dp->catalog = dp_catalog_get(dev, &dp->parser->io);
>   	if (IS_ERR(dp->catalog)) {
>   		rc = PTR_ERR(dp->catalog);
> @@ -768,6 +768,12 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
>   		goto error;
>   	}
>   
> +	rc = dp_power_client_init(dp->power);
> +	if (rc) {
> +		DRM_ERROR("Power client create failed\n");
> +		goto error;
> +	}
> +
>   	dp->aux = dp_aux_get(dev, dp->catalog, dp->dp_display.is_edp);
>   	if (IS_ERR(dp->aux)) {
>   		rc = PTR_ERR(dp->aux);
> @@ -1196,26 +1202,20 @@ static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
>   	return ret;
>   }
>   
> -int dp_display_request_irq(struct msm_dp *dp_display)
> +static int dp_display_request_irq(struct dp_display_private *dp)
>   {
>   	int rc = 0;
> -	struct dp_display_private *dp;
> -
> -	if (!dp_display) {
> -		DRM_ERROR("invalid input\n");
> -		return -EINVAL;
> -	}
> -
> -	dp = container_of(dp_display, struct dp_display_private, dp_display);
> +	struct device *dev = &dp->pdev->dev;
>   
> -	dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
>   	if (!dp->irq) {
> -		DRM_ERROR("failed to get irq\n");
> -		return -EINVAL;
> +		dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
> +		if (!dp->irq) {
> +			DRM_ERROR("failed to get irq\n");
> +			return -EINVAL;
> +		}
>   	}

Use platform_get_irq() from probe() function.

>   
> -	rc = devm_request_irq(dp_display->drm_dev->dev, dp->irq,
> -			dp_display_irq_handler,
> +	rc = devm_request_irq(dev, dp->irq, dp_display_irq_handler,
>   			IRQF_TRIGGER_HIGH, "dp_display_isr", dp);


>   	if (rc < 0) {
>   		DRM_ERROR("failed to request IRQ%u: %d\n",
> @@ -1290,6 +1290,8 @@ static int dp_display_probe(struct platform_device *pdev)
>   
>   	platform_set_drvdata(pdev, &dp->dp_display);
>   
> +	dp_display_request_irq(dp);
> +

Error checking?
Are we completely ready to handle interrupts at this point?

>   	rc = component_add(&pdev->dev, &dp_display_comp_ops);
>   	if (rc) {
>   		DRM_ERROR("component add failed, rc=%d\n", rc);
> @@ -1574,12 +1576,6 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
>   
>   	dp_priv = container_of(dp_display, struct dp_display_private, dp_display);
>   
> -	ret = dp_display_request_irq(dp_display);
> -	if (ret) {
> -		DRM_ERROR("request_irq failed, ret=%d\n", ret);
> -		return ret;
> -	}
> -
>   	ret = dp_display_get_next_bridge(dp_display);
>   	if (ret)
>   		return ret;
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
> index 1e9415a..b3c08de 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.h
> +++ b/drivers/gpu/drm/msm/dp/dp_display.h
> @@ -35,7 +35,6 @@ struct msm_dp {
>   int dp_display_set_plugged_cb(struct msm_dp *dp_display,
>   		hdmi_codec_plugged_cb fn, struct device *codec_dev);
>   int dp_display_get_modes(struct msm_dp *dp_display);
> -int dp_display_request_irq(struct msm_dp *dp_display);
>   bool dp_display_check_video_test(struct msm_dp *dp_display);
>   int dp_display_get_test_bpp(struct msm_dp *dp_display);
>   void dp_display_signal_audio_start(struct msm_dp *dp_display);

-- 
With best wishes
Dmitry