linux-kernel - Re: [PATCH] drm: mediatek: fix prototypes after API change

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Date:	Thu, 30 Jun 2016 07:36:44 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	David Airlie <airlied@...ux.ie>, Mark Brown <broonie@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Jie Qiu <jie.qiu@...iatek.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Junzhi Zhao <junzhi.zhao@...iatek.com>,
	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
	alsa-devel@...a-project.org, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: mediatek: fix prototypes after API change

Hi Arnd,

On Wed, 29 Jun 2016 16:51:29 +0200 Arnd Bergmann <arnd@...db.de> wrote:
>
> The newly added mediatek HDMI driver clashes with an API change
> for struct hdmi_codec_ops, causing an 'allmodconfig' build to fail:
> 
> drivers/gpu/drm/mediatek/mtk_hdmi.c:1653:15: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
> drivers/gpu/drm/mediatek/mtk_hdmi.c:1654:19: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
> drivers/gpu/drm/mediatek/mtk_hdmi.c:1655:20: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
> drivers/gpu/drm/mediatek/mtk_hdmi.c:1656:18: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
> drivers/gpu/drm/mediatek/mtk_hdmi.c:1657:13: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
> 
> This changes the API accordingly for the mediatek driver.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 8f83f26891e1 ("drm/mediatek: Add HDMI support")
> Fixes: efc9194bcff8 ("ASoC: hdmi-codec: callback function will be called with private data")
> ---
> The new driver is currently part of Dave Airlie's drm-next tree,
> while the API change is in Mark Brown's asoc-next tree, so my
> fix has to be done on top of both.

Thanks for sorting this out.

> I can see two ways out of this:
> 
> a) Stephen Rothwell could add my fixup on top of linux-next
>    as a merge fix, and the fix gets sent to Linus Torvalds along
>    with the second of the two branches

I'll do this today, unless someone does the other.

-- 
Cheers,
Stephen Rothwell