linux-kernel - Re: [PATCH v6 6/6] drm/bridge: add PHY initialization in mhdp8546 driver.

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Date:   Wed, 7 Nov 2018 12:49:30 +0100
From:   Andrzej Hajda <a.hajda@...sung.com>
To:     Damian Kos <dkos@...ence.com>, David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Archit Taneja <architt@...eaurora.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sean Paul <sean@...rly.run>, Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        Quentin Schulz <quentin.schulz@...e-electrons.com>,
        Piotr Sroka <piotrs@...ence.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org
Cc:     rafalc@...ence.com, quentin.schulz@...tlin.com, jbergsagel@...com
Subject: Re: [PATCH v6 6/6] drm/bridge: add PHY initialization in mhdp8546
 driver.

On 08.10.2018 23:42, Damian Kos wrote:
> This patch modifies the mhdp8546 driver to initialize sd0801 "Torrent" PHY.
>
> And removes the dbg_regs field from cdns_mhdp_device structure.
>
> Signed-off-by: Damian Kos <dkos@...ence.com>
> ---
>  drivers/gpu/drm/bridge/cdns-mhdp.c    | 9 +++++++++
>  include/drm/bridge/cdns-mhdp-common.h | 1 -
>  2 files changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/cdns-mhdp.c b/drivers/gpu/drm/bridge/cdns-mhdp.c
> index 48ac5cf1e031..caaf3c17d74f 100644
> --- a/drivers/gpu/drm/bridge/cdns-mhdp.c
> +++ b/drivers/gpu/drm/bridge/cdns-mhdp.c
> @@ -17,6 +17,7 @@
>  #include <linux/of.h>
>  #include <linux/platform_device.h>
>  #include <linux/slab.h>
> +#include <linux/phy/phy.h>
>  
>  #include <drm/drm_atomic_helper.h>
>  #include <drm/drm_bridge.h>
> @@ -1220,6 +1221,12 @@ static int mhdp_probe(struct platform_device *pdev)
>  	if (IS_ERR(mhdp->regs))
>  		return PTR_ERR(mhdp->regs);
>  
> +	mhdp->phy = devm_phy_get(&pdev->dev, "dpphy");


It is not documented in the bindings.


> +	if (IS_ERR(mhdp->phy)) {
> +		dev_err(&pdev->dev, "no PHY configured\n");


dev_err only if err != -EPROBE_DEFER


> +		return PTR_ERR(mhdp->phy);
> +	}
> +
>  	platform_set_drvdata(pdev, mhdp);
>  
>  	ret = load_firmware(mhdp, FW_NAME, CDNS_MHDP_IMEM);
> @@ -1291,6 +1298,8 @@ static int mhdp_probe(struct platform_device *pdev)
>  			   mhdp->dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
>  			   &codec_data, sizeof(codec_data));
>  
> +	phy_init(mhdp->phy);
> +


Beside this:

Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>

 --
Regards
Andrzej


>  	/* Enable VIF clock for stream 0 */
>  	cdns_mhdp_reg_read(mhdp, CDNS_DPTX_CAR, &resp);
>  	cdns_mhdp_reg_write(mhdp, CDNS_DPTX_CAR,
> diff --git a/include/drm/bridge/cdns-mhdp-common.h b/include/drm/bridge/cdns-mhdp-common.h
> index d4711091ff2b..1e8a44138ce2 100644
> --- a/include/drm/bridge/cdns-mhdp-common.h
> +++ b/include/drm/bridge/cdns-mhdp-common.h
> @@ -553,7 +553,6 @@ struct cdns_mhdp_device {
>  	struct cdns_mhdp_sink	sink;
>  	struct cdns_mhdp_bridge	bridge;
>  	struct phy		*phy;
> -	void __iomem		*dbg_regs;
>  
>  	struct video_info	video_info;
>  	struct drm_display_mode	mode;