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Message-ID: <3e011d52-017e-4360-86b4-781535ef61ad@rock-chips.com>
Date:   Fri, 17 Nov 2023 15:06:35 +0800
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Subject: Re: [PATCH 09/11] drm/rockchip: vop2: Add support for rk3588
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To:     Sebastian Reichel <sebastian.reichel@collabora.com>
Cc:     Sascha Hauer <s.hauer@pengutronix.de>, Andy Yan <andyshrk@163.com>,
        heiko@sntech.de, hjc@rock-chips.com,
        dri-devel@lists.freedesktop.org,
        linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org,
        krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org,
        devicetree@vger.kernel.org, kever.yang@rock-chips.com,
        chris.obbard@collabora.com
References: <20231114112534.1770731-1-andyshrk@163.com>
 <20231114112855.1771372-1-andyshrk@163.com>
 <20231115090823.GY3359458@pengutronix.de>
 <8f2ebc81-51c5-44d5-b27b-633a6cc85d0d@rock-chips.com>
 <20231116134757.zu7axb6cvriqjm6y@mercury.elektranox.org>
From:   Andy Yan <andy.yan@rock-chips.com>
In-Reply-To: <20231116134757.zu7axb6cvriqjm6y@mercury.elektranox.org>
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Hi Sebastian:

On 11/16/23 21:47, Sebastian Reichel wrote:
> Hi,
>
> On Thu, Nov 16, 2023 at 06:39:40PM +0800, Andy Yan wrote:
>>>>    	vop2->sys_grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf");
>>> This already lacks an error check, shame on me...
>>>
>>>> +	vop2->vop_grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,vop-grf");
>>>> +	vop2->vo1_grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,vo1-grf");
>>>> +	vop2->sys_pmu = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,pmu");
>>> ... but please don't duplicate that.
>> It a little difficult to find a proper way to do the check, as not every soc need all these phandles.
>>
>> Do i need check it per soc?
> I suggest adding a u32 flags to struct vop2_data and then have
> something like this:
>
> if (vop2_data->flags & VOP2_HAS_VOP_GRF) {
>      vop2->vop_grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,vop-grf");
>      if (IS_ERR(vop2->vop_grf))
>          return dev_err_probe(dev, PTR_ERR(vop2->vop_grf) "cannot get vop-grf");
> }
>
> if (vop2_data->flags & VOP2_HAS_VO1_GRF) {
>      vop2->vo1_grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,vo1-grf");
>      if (IS_ERR(vop2->vo1_grf))
>          return dev_err_probe(dev, PTR_ERR(vop2->vo1_grf) "cannot get vo1-grf");
> }
>
> ...


I can do it like this if Sascha is also happy with it.

>
> Greetings,
>
> -- Sebastian