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

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Date:   Fri, 19 May 2017 12:17:34 +0000
From:   Philippe CORNU <philippe.cornu@...com>
To:     Julia Lawall <julia.lawall@...6.fr>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
CC:     "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)



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

> b759012c Yannick Fertre 2017-04-14  467
> b759012c Yannick Fertre 2017-04-14  468  	if (vm.flags & DISPLAY_FLAGS_HSYNC_HIGH)
> b759012c Yannick Fertre 2017-04-14  469  		val |= HSPOL_AH;
> b759012c Yannick Fertre 2017-04-14  470
> b759012c Yannick Fertre 2017-04-14  471  	if (vm.flags & DISPLAY_FLAGS_VSYNC_HIGH)
> b759012c Yannick Fertre 2017-04-14  472  		val |= VSPOL_AH;
> b759012c Yannick Fertre 2017-04-14  473
> b759012c Yannick Fertre 2017-04-14  474  	if (vm.flags & DISPLAY_FLAGS_DE_HIGH)
> 
> :::::: The code at line 466 was first introduced by commit
> :::::: b759012c5fa761ee08998c80fc4ad6343c258487 drm/stm: Add STM32 LTDC driver
> 
> :::::: TO: Yannick Fertre <yannick.fertre@...com>
> :::::: CC: Eric Anholt <eric@...olt.net>
> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
>