linux-kernel - Re: [PATCH v2 02/14] drm/bridge: ti-sn65dsi86: Simplify refclk handling

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Message-ID: <083f59ab-b67e-f574-12e7-5ef42f443e4e@samsung.com>
Date:   Wed, 31 Mar 2021 11:09:20 +0200
From:   Andrzej Hajda <a.hajda@...sung.com>
To:     Douglas Anderson <dianders@...omium.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Sam Ravnborg <sam@...nborg.org>
Cc:     robdclark@...omium.org, dri-devel@...ts.freedesktop.org,
        David Airlie <airlied@...ux.ie>, linux-arm-msm@...r.kernel.org,
        Steev Klimaszewski <steev@...i.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Stanislav Lisovskiy <stanislav.lisovskiy@...el.com>,
        Robert Foss <robert.foss@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 02/14] drm/bridge: ti-sn65dsi86: Simplify refclk
 handling


W dniu 30.03.2021 o 04:53, Douglas Anderson pisze:
> The clock framework makes it simple to deal with an optional clock.
> You can call clk_get_optional() and if the clock isn't specified it'll
> just return NULL without complaint. It's valid to pass NULL to
> enable/disable/prepare/unprepare. Let's make use of this to simplify
> things a tiny bit.
>
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Robert Foss <robert.foss@...aro.org>
> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Reviewed-by: Stephen Boyd <swboyd@...omium.org>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>

Regards
Andrzej
> ---
>
> Changes in v2:
> - Removed 2nd paragraph in commit message.
>
>   drivers/gpu/drm/bridge/ti-sn65dsi86.c | 11 +++--------
>   1 file changed, 3 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> index 88df4dd0f39d..96fe8f2c0ea9 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> @@ -1275,14 +1275,9 @@ static int ti_sn_bridge_probe(struct i2c_client *client,
>   		return ret;
>   	}
>   
> -	pdata->refclk = devm_clk_get(pdata->dev, "refclk");
> -	if (IS_ERR(pdata->refclk)) {
> -		ret = PTR_ERR(pdata->refclk);
> -		if (ret == -EPROBE_DEFER)
> -			return ret;
> -		DRM_DEBUG_KMS("refclk not found\n");
> -		pdata->refclk = NULL;
> -	}
> +	pdata->refclk = devm_clk_get_optional(pdata->dev, "refclk");
> +	if (IS_ERR(pdata->refclk))
> +		return PTR_ERR(pdata->refclk);
>   
>   	ret = ti_sn_bridge_parse_dsi_host(pdata);
>   	if (ret)