linux-kernel - Re: [PATCH v2 2/3] drm/msm/dp: Add support for setting the eDP mode from devicetree

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Date: Tue, 27 Feb 2024 12:18:07 -0800
From: Bjorn Andersson <quic_bjorande@...cinc.com>
To: Abel Vesa <abel.vesa@...aro.org>
CC: Rob Clark <robdclark@...il.com>,
        Abhinav Kumar
	<quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        "Maarten
 Lankhorst" <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard
	<mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konrad.dybcio@...aro.org>,
        Johan Hovold <johan@...nel.org>, <linux-arm-msm@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>, <freedreno@...ts.freedesktop.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/3] drm/msm/dp: Add support for setting the eDP mode
 from devicetree

On Thu, Feb 22, 2024 at 05:55:07PM +0200, Abel Vesa wrote:
> Instead of relying on different compatibles for eDP and DP, use
> the is-edp property from DT to figure out the connector type and
> then pass on that information to the PHY.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>

Reviewed-by: Bjorn Andersson <quic_bjorande@...cinc.com>

Regards,
Bjorn

> ---
>  drivers/gpu/drm/msm/dp/dp_ctrl.c    | 11 +++++++++++
>  drivers/gpu/drm/msm/dp/dp_ctrl.h    |  1 +
>  drivers/gpu/drm/msm/dp/dp_display.c | 17 ++++++++++++++---
>  3 files changed, 26 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
> index 320f17fce9a6..bd81cc6bd5e3 100644
> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
> @@ -1533,6 +1533,17 @@ void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enter)
>  	}
>  }
>  
> +int dp_ctrl_phy_set_mode(struct dp_ctrl *dp_ctrl, int submode)
> +{
> +	struct dp_ctrl_private *ctrl;
> +	struct phy *phy;
> +
> +	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
> +	phy = ctrl->phy;
> +
> +	return phy_set_mode_ext(phy, PHY_MODE_DP, submode);
> +}
> +
>  void dp_ctrl_phy_init(struct dp_ctrl *dp_ctrl)
>  {
>  	struct dp_ctrl_private *ctrl;
> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
> index fa014cee7e21..a10d1b19d172 100644
> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
> @@ -32,6 +32,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
>  			struct phy *phy);
>  
>  void dp_ctrl_reset_irq_ctrl(struct dp_ctrl *dp_ctrl, bool enable);
> +int dp_ctrl_phy_set_mode(struct dp_ctrl *dp_ctrl, int mode);
>  void dp_ctrl_phy_init(struct dp_ctrl *dp_ctrl);
>  void dp_ctrl_phy_exit(struct dp_ctrl *dp_ctrl);
>  void dp_ctrl_irq_phy_exit(struct dp_ctrl *dp_ctrl);
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index e4433891becb..e01b41ad2e2a 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1229,6 +1229,7 @@ static int dp_display_probe(struct platform_device *pdev)
>  	int rc = 0;
>  	struct dp_display_private *dp;
>  	const struct msm_dp_desc *desc;
> +	bool is_edp;
>  
>  	if (!pdev || !pdev->dev.of_node) {
>  		DRM_ERROR("pdev not found\n");
> @@ -1243,13 +1244,17 @@ static int dp_display_probe(struct platform_device *pdev)
>  	if (!desc)
>  		return -EINVAL;
>  
> +	is_edp = (desc->connector_type == DRM_MODE_CONNECTOR_eDP) ||
> +		 of_property_read_bool(pdev->dev.of_node, "is-edp");
> +
>  	dp->dp_display.pdev = pdev;
>  	dp->name = "drm_dp";
>  	dp->id = desc->id;
> -	dp->dp_display.connector_type = desc->connector_type;
> +	dp->dp_display.connector_type = is_edp ?
> +					DRM_MODE_CONNECTOR_eDP :
> +					DRM_MODE_CONNECTOR_DisplayPort;
>  	dp->wide_bus_en = desc->wide_bus_en;
> -	dp->dp_display.is_edp =
> -		(dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
> +	dp->dp_display.is_edp = is_edp;
>  
>  	rc = dp_init_sub_modules(dp);
>  	if (rc) {
> @@ -1257,6 +1262,12 @@ static int dp_display_probe(struct platform_device *pdev)
>  		return -EPROBE_DEFER;
>  	}
>  
> +	rc = dp_ctrl_phy_set_mode(dp->ctrl, is_edp ? PHY_SUBMODE_EDP : PHY_SUBMODE_DP);
> +	if (rc) {
> +		DRM_ERROR("setting PHY submode failed\n");
> +		goto err;
> +	}
> +
>  	/* setup event q */
>  	mutex_init(&dp->event_mutex);
>  	init_waitqueue_head(&dp->event_q);
> 
> -- 
> 2.34.1
>