linux-kernel - Re: [PATCH v5 3/5] drm/exynos: dsi: Fix the parse

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Message-ID: <CAJKOXPeD4HKemKTrnC2JaON3JkuNGO9g+Hg8M7F6f2WusiYkhg@mail.gmail.com>
Date:   Tue, 28 Mar 2017 11:38:27 +0300
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Inki Dae <inki.dae@...sung.com>
Cc:     Hoegeun Kwon <hoegeun.kwon@...sung.com>, jy0922.shim@...sung.com,
        Seung Woo Kim <sw0312.kim@...sung.com>, airlied@...ux.ie,
        kgene@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        catalin.marinas@....com, will.deacon@....com,
        Javier Martinez Canillas <javier@....samsung.com>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, a.hajda@...sung.com,
        Andi Shyti <andi.shyti@...sung.com>, LW@...o-electronics.de
Subject: Re: [PATCH v5 3/5] drm/exynos: dsi: Fix the parse_dt function

On Tue, Mar 28, 2017 at 11:26 AM, Inki Dae <inki.dae@...sung.com> wrote:
> Merged.

Hi,

I do not see the tag (with DT patches) merged by you which I provided
to you before. These are essential for bisectability. Without them,
kernel bisectability is broken. Did you merged the tag somewhere?

Best regards,
Krzysztof

> Thanks,
> Inki Dae
>
> 2017년 03월 22일 10:36에 Hoegeun Kwon 이(가) 쓴 글:
>> Hi inki,
>>
>> Could you check the this patch?
>> For reference, patch 1/5 and 2/5 have already been applied to Krzysztof tree.
>>
>> Best regards,
>> Hoegeun
>>
>>
>> On 03/08/2017 01:54 PM, Hoegeun Kwon wrote:
>>> The dsi + panel is a parental relationship, so OF grpah is not needed.
>>> Therefore, the current dsi_parse_dt function will throw an error,
>>> because there is no linked OF graph for the case fimd + dsi + panel.
>>>
>>> Parse the Pll burst and esc clock frequency properties in dsi_parse_dt()
>>> and create a bridge_node only if there is an OF graph associated with dsi.
>>>
>>> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@...sung.com>
>>> Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>
>>> Reviewed-by: Andi Shyti <andi.shyti@...sung.com>
>>> ---
>>>   drivers/gpu/drm/exynos/exynos_drm_dsi.c | 32 ++++++++------------------------
>>>   1 file changed, 8 insertions(+), 24 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
>>> index f5c04d0..2d4e118 100644
>>> --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
>>> +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
>>> @@ -1652,39 +1652,23 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
>>>       if (ret < 0)
>>>           return ret;
>>>   -    ep = of_graph_get_endpoint_by_regs(node, DSI_PORT_OUT, 0);
>>> -    if (!ep) {
>>> -        dev_err(dev, "no output port with endpoint specified\n");
>>> -        return -EINVAL;
>>> -    }
>>> -
>>> -    ret = exynos_dsi_of_read_u32(ep, "samsung,burst-clock-frequency",
>>> +    ret = exynos_dsi_of_read_u32(node, "samsung,burst-clock-frequency",
>>>                        &dsi->burst_clk_rate);
>>>       if (ret < 0)
>>> -        goto end;
>>> +        return ret;
>>>   -    ret = exynos_dsi_of_read_u32(ep, "samsung,esc-clock-frequency",
>>> +    ret = exynos_dsi_of_read_u32(node, "samsung,esc-clock-frequency",
>>>                        &dsi->esc_clk_rate);
>>>       if (ret < 0)
>>> -        goto end;
>>> -
>>> -    of_node_put(ep);
>>> +        return ret;
>>>         ep = of_graph_get_next_endpoint(node, NULL);
>>> -    if (!ep) {
>>> -        ret = -EINVAL;
>>> -        goto end;
>>> -    }
>>> -
>>> -    dsi->bridge_node = of_graph_get_remote_port_parent(ep);
>>> -    if (!dsi->bridge_node) {
>>> -        ret = -EINVAL;
>>> -        goto end;
>>> +    if (ep) {
>>> +        dsi->bridge_node = of_graph_get_remote_port_parent(ep);
>>> +        of_node_put(ep);
>>>       }
>>> -end:
>>> -    of_node_put(ep);
>>>   -    return ret;
>>> +    return 0;
>>>   }
>>>     static int exynos_dsi_bind(struct device *dev, struct device *master,
>>
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