linux-kernel - Re: [Freedreno] [PATCH v5 3/7] drm/msm/dp: Allow specifying connector

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Message-ID: <94c1d92263498f83c39d3383cc122a05@codeaurora.org>
Date:   Mon, 18 Oct 2021 16:07:56 -0700
From:   abhinavk@...eaurora.org
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Kalyan Thota <kalyan_t@...eaurora.org>,
        Kuogee Hsieh <khsieh@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [Freedreno] [PATCH v5 3/7] drm/msm/dp: Allow specifying
 connector_type per controller

On 2021-10-16 15:18, Bjorn Andersson wrote:
> As the following patches introduced support for multiple DP blocks in a
> platform and some of those block might be eDP it becomes useful to be
> able to specify the connector type per block.
> 
> Although there's only a single block at this point, the array of descs
> and the search in dp_display_get_desc() are introduced here to simplify
> the next patch, that does introduce support for multiple DP blocks.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Reviewed-by: Abhinav Kumar <abhinavk@...eaurora.org>
> ---
> 
> Changes since v4:
> - const the various struct msm_dp_desc instances
> - unsigned the connector_type
> 
> 
> The references to DRM_MODE_CONNECTOR_DisplayPort in dp_debug.c, that 
> was
> highligted in the review of v4 has been removed in a separate patch.
> 
>  drivers/gpu/drm/msm/dp/dp_display.c | 43 ++++++++++++++++++++++++++++-
>  drivers/gpu/drm/msm/dp/dp_display.h |  1 +
>  drivers/gpu/drm/msm/dp/dp_drm.c     |  2 +-
>  3 files changed, 44 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
> b/drivers/gpu/drm/msm/dp/dp_display.c
> index 5d3ee5ef07c2..6913970c8cf9 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -115,8 +115,25 @@ struct dp_display_private {
>  	struct dp_audio *audio;
>  };
> 
> +struct msm_dp_desc {
> +	phys_addr_t io_start;
> +	unsigned int connector_type;
> +};
> +
> +struct msm_dp_config {
> +	const struct msm_dp_desc *descs;
> +	size_t num_descs;
> +};
> +
> +static const struct msm_dp_config sc7180_dp_cfg = {
> +	.descs = (const struct msm_dp_desc[]) {
> +		{ .io_start = 0x0ae90000, .connector_type = 
> DRM_MODE_CONNECTOR_DisplayPort },
> +	},
> +	.num_descs = 1,
> +};
> +
>  static const struct of_device_id dp_dt_match[] = {
> -	{.compatible = "qcom,sc7180-dp"},
> +	{ .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_cfg },
>  	{}
>  };
> 
> @@ -1180,10 +1197,29 @@ int dp_display_request_irq(struct msm_dp 
> *dp_display)
>  	return 0;
>  }
> 
> +static const struct msm_dp_desc *dp_display_get_desc(struct
> platform_device *pdev)
> +{
> +	const struct msm_dp_config *cfg = 
> of_device_get_match_data(&pdev->dev);
> +	struct resource *res;
> +	int i;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (!res)
> +		return NULL;
> +
> +	for (i = 0; i < cfg->num_descs; i++)
> +		if (cfg->descs[i].io_start == res->start)
> +			return &cfg->descs[i];
> +
> +	dev_err(&pdev->dev, "unknown displayport instance\n");
> +	return NULL;
> +}
> +
>  static int dp_display_probe(struct platform_device *pdev)
>  {
>  	int rc = 0;
>  	struct dp_display_private *dp;
> +	const struct msm_dp_desc *desc;
> 
>  	if (!pdev || !pdev->dev.of_node) {
>  		DRM_ERROR("pdev not found\n");
> @@ -1194,8 +1230,13 @@ static int dp_display_probe(struct 
> platform_device *pdev)
>  	if (!dp)
>  		return -ENOMEM;
> 
> +	desc = dp_display_get_desc(pdev);
> +	if (!desc)
> +		return -EINVAL;
> +
>  	dp->pdev = pdev;
>  	dp->name = "drm_dp";
> +	dp->dp_display.connector_type = desc->connector_type;
> 
>  	rc = dp_init_sub_modules(dp);
>  	if (rc) {
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.h
> b/drivers/gpu/drm/msm/dp/dp_display.h
> index 8b47cdabb67e..75fcabcfbbdd 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.h
> +++ b/drivers/gpu/drm/msm/dp/dp_display.h
> @@ -18,6 +18,7 @@ struct msm_dp {
>  	bool is_connected;
>  	bool audio_enabled;
>  	bool power_on;
> +	unsigned int connector_type;
> 
>  	hdmi_codec_plugged_cb plugged_cb;
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c 
> b/drivers/gpu/drm/msm/dp/dp_drm.c
> index 764f4b81017e..f33e31523f56 100644
> --- a/drivers/gpu/drm/msm/dp/dp_drm.c
> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c
> @@ -147,7 +147,7 @@ struct drm_connector *dp_drm_connector_init(struct
> msm_dp *dp_display)
> 
>  	ret = drm_connector_init(dp_display->drm_dev, connector,
>  			&dp_connector_funcs,
> -			DRM_MODE_CONNECTOR_DisplayPort);
> +			dp_display->connector_type);
>  	if (ret)
>  		return ERR_PTR(ret);