linux-kernel - Re: [RESEND PATCH v6 22/27] drm/bridge: analogix_dp: Split the platform-specific poweron in two parts

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Message-ID: <000501d3dbd4$e6f238e0$b4d6aaa0$@gmail.com>
Date:   Tue, 24 Apr 2018 10:02:33 -0400
From:   "Jingoo Han" <jingoohan1@...il.com>
To:     "'Enric Balletbo i Serra'" <enric.balletbo@...labora.com>,
        <architt@...eaurora.org>, <inki.dae@...sung.com>,
        <thierry.reding@...il.com>, <hjc@...k-chips.com>,
        <seanpaul@...omium.org>, <airlied@...ux.ie>, <tfiga@...omium.org>,
        <heiko@...ech.de>
Cc:     <dri-devel@...ts.freedesktop.org>, <dianders@...omium.org>,
        <a.hajda@...sung.com>, <kernel@...labora.com>,
        <m.szyprowski@...sung.com>, <linux-samsung-soc@...r.kernel.org>,
        <jy0922.shim@...sung.com>, <rydberg@...math.org>,
        <krzk@...nel.org>, <linux-rockchip@...ts.infradead.org>,
        <kgene@...nel.org>, <orjan.eide@....com>, <wxt@...k-chips.com>,
        <jeffy.chen@...k-chips.com>,
        <linux-arm-kernel@...ts.infradead.org>, <wzz@...k-chips.com>,
        <hl@...k-chips.com>, <sw0312.kim@...sung.com>,
        <linux-kernel@...r.kernel.org>, <kyungmin.park@...sung.com>,
        <Laurent.pinchart@...asonboard.com>, <kuankuan.y@...il.com>,
        <hshi@...omium.org>,
        "'Kristian H . Kristensen'" <hoegsberg@...omium.org>
Subject: Re: [RESEND PATCH v6 22/27] drm/bridge: analogix_dp: Split the platform-specific poweron in two parts

On Monday, April 23, 2018 6:50 AM, Enric Balletbo i Serra wrote:
> 
> From: Douglas Anderson <dianders@...omium.org>
> 
> Some of the platform-specific stuff in rockchip_dp_poweron() needs to
> happen before the generic code.  Some needs to happen after.  Let's
> split the callback in two.
> 
> Specifically we can't start doing PSR work until _after_ the whole
> controller is up, so don't set the enable until the end.
> 
> Cc: Kristian H. Kristensen <hoegsberg@...omium.org>
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> [seanpaul added exynos change]
> Signed-off-by: Sean Paul <seanpaul@...omium.org>
> Signed-off-by: Thierry Escande <thierry.escande@...labora.com>
> Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Reviewed-by: Archit Taneja <architt@...eaurora.org>

Acked-by: Jingoo Han <jingoohan1@...il.com>

Best regards,
Jingoo Han

> ---
> 
>  drivers/gpu/drm/bridge/analogix/analogix_dp_core.c |  7 +++++--
>  drivers/gpu/drm/exynos/exynos_dp.c                 |  2 +-
>  drivers/gpu/drm/rockchip/analogix_dp-rockchip.c    | 12 ++++++++++--
>  include/drm/bridge/analogix_dp.h                   |  3 ++-
>  4 files changed, 18 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index a260de4f0bd8..2bcbfadb6ac5 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -1260,8 +1260,8 @@ static int analogix_dp_set_bridge(struct
> analogix_dp_device *dp)
>  		goto out_dp_clk_pre;
>  	}
> 
> -	if (dp->plat_data->power_on)
> -		dp->plat_data->power_on(dp->plat_data);
> +	if (dp->plat_data->power_on_start)
> +		dp->plat_data->power_on_start(dp->plat_data);
> 
>  	phy_power_on(dp->phy);
> 
> @@ -1286,6 +1286,9 @@ static int analogix_dp_set_bridge(struct
> analogix_dp_device *dp)
>  		goto out_dp_init;
>  	}
> 
> +	if (dp->plat_data->power_on_end)
> +		dp->plat_data->power_on_end(dp->plat_data);
> +
>  	enable_irq(dp->irq);
>  	return 0;
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_dp.c
> b/drivers/gpu/drm/exynos/exynos_dp.c
> index 964831dab102..86330f396784 100644
> --- a/drivers/gpu/drm/exynos/exynos_dp.c
> +++ b/drivers/gpu/drm/exynos/exynos_dp.c
> @@ -162,7 +162,7 @@ static int exynos_dp_bind(struct device *dev, struct
> device *master, void *data)
>  	dp->drm_dev = drm_dev;
> 
>  	dp->plat_data.dev_type = EXYNOS_DP;
> -	dp->plat_data.power_on = exynos_dp_poweron;
> +	dp->plat_data.power_on_start = exynos_dp_poweron;
>  	dp->plat_data.power_off = exynos_dp_poweroff;
>  	dp->plat_data.attach = exynos_dp_bridge_attach;
>  	dp->plat_data.get_modes = exynos_dp_get_modes;
> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> index b3f46ed24cdc..23317a2269e1 100644
> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> @@ -109,7 +109,7 @@ static int rockchip_dp_pre_init(struct
> rockchip_dp_device *dp)
>  	return 0;
>  }
> 
> -static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
> +static int rockchip_dp_poweron_start(struct analogix_dp_plat_data
> *plat_data)
>  {
>  	struct rockchip_dp_device *dp = to_dp(plat_data);
>  	int ret;
> @@ -127,6 +127,13 @@ static int rockchip_dp_poweron(struct
> analogix_dp_plat_data *plat_data)
>  		return ret;
>  	}
> 
> +	return ret;
> +}
> +
> +static int rockchip_dp_poweron_end(struct analogix_dp_plat_data
> *plat_data)
> +{
> +	struct rockchip_dp_device *dp = to_dp(plat_data);
> +
>  	return rockchip_drm_psr_activate(&dp->encoder);
>  }
> 
> @@ -330,7 +337,8 @@ static int rockchip_dp_bind(struct device *dev, struct
> device *master,
>  	dp->plat_data.encoder = &dp->encoder;
> 
>  	dp->plat_data.dev_type = dp->data->chip_type;
> -	dp->plat_data.power_on = rockchip_dp_poweron;
> +	dp->plat_data.power_on_start = rockchip_dp_poweron_start;
> +	dp->plat_data.power_on_end = rockchip_dp_poweron_end;
>  	dp->plat_data.power_off = rockchip_dp_powerdown;
>  	dp->plat_data.get_modes = rockchip_dp_get_modes;
> 
> diff --git a/include/drm/bridge/analogix_dp.h
> b/include/drm/bridge/analogix_dp.h
> index e9a1116d2f8e..475b706b49de 100644
> --- a/include/drm/bridge/analogix_dp.h
> +++ b/include/drm/bridge/analogix_dp.h
> @@ -33,7 +33,8 @@ struct analogix_dp_plat_data {
>  	struct drm_connector *connector;
>  	bool skip_connector;
> 
> -	int (*power_on)(struct analogix_dp_plat_data *);
> +	int (*power_on_start)(struct analogix_dp_plat_data *);
> +	int (*power_on_end)(struct analogix_dp_plat_data *);
>  	int (*power_off)(struct analogix_dp_plat_data *);
>  	int (*attach)(struct analogix_dp_plat_data *, struct drm_bridge *,
>  		      struct drm_connector *);
> --
> 2.17.0