linux-kernel - Re: [PATCH] drm/stm: add COMPILE

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Date:   Sun, 21 May 2017 02:32:11 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Philippe CORNU <philippe.cornu@...com>
Cc:     Julia Lawall <julia.lawall@...6.fr>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Yannick FERTRE <yannick.fertre@...com>,
        David Airlie <airlied@...ux.ie>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        "kbuild@...org" <kbuild@...org>
Subject: Re: [PATCH] drm/stm: add COMPILE_TEST to Kconfig (fwd)

Hi Philippe,


2017-05-19 21:17 GMT+09:00 Philippe CORNU <philippe.cornu@...com>:
>
>
> On 05/19/2017 09:49 AM, Julia Lawall wrote:
>> On line 466, the preceeding comment suggests that the second constant
>> should start with VS rather than HS again.
>>
>> julia
>>
>> ---------- Forwarded message ----------
>> Date: Fri, 19 May 2017 15:45:39 +0800
>> From: kbuild test robot <fengguang.wu@...el.com>
>> To: kbuild@...org
>> Cc: Julia Lawall <julia.lawall@...6.fr>
>> Subject: Re: [PATCH] drm/stm: add COMPILE_TEST to Kconfig
>>
>> CC: kbuild-all@...org
>> In-Reply-To: <1495082711-10535-1-git-send-email-yamada.masahiro@...ionext.com>
>> TO: Masahiro Yamada <yamada.masahiro@...ionext.com>
>> CC: dri-devel@...ts.freedesktop.org, Daniel Vetter <daniel.vetter@...el.com>, linux-kernel@...r.kernel.org, Masahiro Yamada <yamada.masahiro@...ionext.com>, Yannick Fertre <yannick.fertre@...com>, Philippe Cornu <philippe.cornu@...com>, David Airlie <airlied@...ux.ie>
>> CC: linux-kernel@...r.kernel.org, Masahiro Yamada <yamada.masahiro@...ionext.com>, Yannick Fertre <yannick.fertre@...com>, Philippe Cornu <philippe.cornu@...com>, David Airlie <airlied@...ux.ie>
>>
>> Hi Masahiro,
>>
>> [auto build test WARNING on drm/drm-next]
>> [cannot apply to v4.12-rc1 next-20170518]
>> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>>
>> url:    https://github.com/0day-ci/linux/commits/Masahiro-Yamada/drm-stm-add-COMPILE_TEST-to-Kconfig/20170519-131342
>> base:   git://people.freedesktop.org/~airlied/linux.git drm-next
>> :::::: branch date: 3 hours ago
>> :::::: commit date: 3 hours ago
>>
>>>> drivers/gpu/drm/stm/ltdc.c:466:7-15: duplicated argument to & or |
>>
>> git remote add linux-review https://github.com/0day-ci/linux
>> git remote update linux-review
>> git checkout c669a25d907f95d3e13f1dae9812642330b4aa28
>> vim +466 drivers/gpu/drm/stm/ltdc.c
>>
>> b759012c Yannick Fertre 2017-04-14  450       accum_vbp = vsync + vm.vback_porch;
>> b759012c Yannick Fertre 2017-04-14  451       accum_act_w = accum_hbp + vm.hactive;
>> b759012c Yannick Fertre 2017-04-14  452       accum_act_h = accum_vbp + vm.vactive;
>> b759012c Yannick Fertre 2017-04-14  453       total_width = accum_act_w + vm.hfront_porch;
>> b759012c Yannick Fertre 2017-04-14  454       total_height = accum_act_h + vm.vfront_porch;
>> b759012c Yannick Fertre 2017-04-14  455
>> b759012c Yannick Fertre 2017-04-14  456       clk_disable(ldev->pixel_clk);
>> b759012c Yannick Fertre 2017-04-14  457
>> b759012c Yannick Fertre 2017-04-14  458       if (clk_set_rate(ldev->pixel_clk, rate) < 0) {
>> b759012c Yannick Fertre 2017-04-14  459               DRM_ERROR("Cannot set rate (%dHz) for pixel clk\n", rate);
>> b759012c Yannick Fertre 2017-04-14  460               return;
>> b759012c Yannick Fertre 2017-04-14  461       }
>> b759012c Yannick Fertre 2017-04-14  462
>> b759012c Yannick Fertre 2017-04-14  463       clk_enable(ldev->pixel_clk);
>> b759012c Yannick Fertre 2017-04-14  464
>> b759012c Yannick Fertre 2017-04-14  465       /* Configures the HS, VS, DE and PC polarities. */
>> b759012c Yannick Fertre 2017-04-14 @466       val = HSPOL_AL | HSPOL_AL | DEPOL_AL | PCPOL_IPC;
>
> Thanks Julia for your comments.
> Masahiro, may I ask you please to propose a patch (simply rename the 2nd
> HSPOL_AL to VSPOL_AL at line 466.) as the issue is revealed by your
> patch named "drm/stm: add COMPILE_TEST to Kconfig".
> Many thanks,
> Philippe


I added COMPILE_TEST, but my objective was  to
easily test my ccflags-y cleanup works for Kbuild.

The change will not affect the behavior
(because both HSPOL_AL and HSPO_AL are defined as 0),
but I think it should be fixed by a person who is familiar with this driver.




-- 
Best Regards
Masahiro Yamada