From: Matthias Brugger <matthias.bgg@gmail.com>
To: Miles Chen <miles.chen@mediatek.com>,
Chun-Kuang Hu <chunkuang.hu@kernel.org>,
Philipp Zabel <p.zabel@pengutronix.de>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org,
linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drm/mediatek: Fix unused-but-set variable warning
Date: Tue, 28 Dec 2021 15:53:55 +0100 [thread overview]
Message-ID: <fcaccc97-e920-08eb-ec3f-4c4b11ea8925@gmail.com> (raw)
In-Reply-To: <20211228092527.29894-1-miles.chen@mediatek.com>
On 28/12/2021 10:25, Miles Chen wrote:
> Fix unused-but-set variable warning:
> drivers/gpu/drm/mediatek/mtk_cec.c:85:6: warning: variable 'tmp' set but not used [-Wunused-but-set-variable]
>
Actually we ignore the value passed to mtk_cec_mask. In case of
mtk_cec_mask(cec, CEC_CKGEN, 0 | CEC_32K_PDN, PDN | CEC_32K_PDN);
We are not setting CEC_32K_PDN. I wonder which side effect will it have to set
that bit.
Anyway, if it's the right thing to do, we should add:
Fixes: 8f83f26891e1 ("drm/mediatek: Add HDMI support")
Regards,
Matthias
> Signed-off-by: Miles Chen <miles.chen@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_cec.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_cec.c b/drivers/gpu/drm/mediatek/mtk_cec.c
> index e9cef5c0c8f7..cdfa648910b2 100644
> --- a/drivers/gpu/drm/mediatek/mtk_cec.c
> +++ b/drivers/gpu/drm/mediatek/mtk_cec.c
> @@ -85,7 +85,7 @@ static void mtk_cec_mask(struct mtk_cec *cec, unsigned int offset,
> u32 tmp = readl(cec->regs + offset) & ~mask;
>
> tmp |= val & mask;
> - writel(val, cec->regs + offset);
> + writel(tmp, cec->regs + offset);
> }
>
> void mtk_cec_set_hpd_event(struct device *dev,
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-12-28 15:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-28 9:25 [PATCH] drm/mediatek: Fix unused-but-set variable warning Miles Chen
2021-12-28 14:53 ` Matthias Brugger [this message]
2021-12-29 3:04 ` miles.chen
2021-12-29 14:25 ` Matthias Brugger
2021-12-30 6:56 ` miles.chen
2022-01-02 23:46 ` [PATCH v3] " miles.chen
2022-01-07 1:40 ` Miles Chen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=fcaccc97-e920-08eb-ec3f-4c4b11ea8925@gmail.com \
--to=matthias.bgg@gmail.com \
--cc=airlied@linux.ie \
--cc=chunkuang.hu@kernel.org \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=miles.chen@mediatek.com \
--cc=p.zabel@pengutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).