linux-kernel - Re: [PATCH v2] drm/bridge: anx7625: Fix edid_read break case in sp_tx_edid

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Message-ID: <CAG3jFytd0PXYNB_2NUcyr2pD1xJ-YJkDSqiSivbiPStV0s_qtw@mail.gmail.com>
Date:   Wed, 24 Nov 2021 13:39:44 +0100
From:   Robert Foss <robert.foss@...aro.org>
To:     Xin Ji <xji@...logixsemi.com>
Cc:     Hsin-Yi Wang <hsinyi@...omium.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Pi-Hsun Shih <pihsun@...omium.org>,
        Sam Ravnborg <sam@...nborg.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux@...ck-us.net
Subject: Re: [PATCH v2] drm/bridge: anx7625: Fix edid_read break case in sp_tx_edid_read()

On Fri, 19 Nov 2021 at 02:55, Xin Ji <xji@...logixsemi.com> wrote:
>
> On Fri, Nov 19, 2021 at 03:30:02AM +0800, Hsin-Yi Wang wrote:
> > edid_read() was assumed to return 0 on success. After
> > 7f16d0f3b8e2("drm/bridge: anx7625: Propagate errors from sp_tx_rst_aux()"),
> > the function will return > 0 for successful case, representing the i2c
> > read bytes. Otherwise -EIO on failure cases. Update the g_edid_break
> > break condition accordingly.
> Hi Hsin-Yi, thanks for the patch!
> Reviewed-by: Xin Ji <xji@...logixsemi.com>
> >
> > Fixes: 7f16d0f3b8e2("drm/bridge: anx7625: Propagate errors from sp_tx_rst_aux()")
> > Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
> > Reviewed-by: Robert Foss <robert.foss@...aro.org>
> > ---
> > v2: Fix type error.
> > ---
> >  drivers/gpu/drm/bridge/analogix/anx7625.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > index 1a871f6b6822ee..3a18f1dabcfd51 100644
> > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > @@ -795,7 +795,7 @@ static int sp_tx_edid_read(struct anx7625_data *ctx,
> >       int count, blocks_num;
> >       u8 pblock_buf[MAX_DPCD_BUFFER_SIZE];
> >       u8 i, j;
> > -     u8 g_edid_break = 0;
> > +     int g_edid_break = 0;
> >       int ret;
> >       struct device *dev = &ctx->client->dev;
> >
> > @@ -826,7 +826,7 @@ static int sp_tx_edid_read(struct anx7625_data *ctx,
> >                               g_edid_break = edid_read(ctx, offset,
> >                                                        pblock_buf);
> >
> > -                             if (g_edid_break)
> > +                             if (g_edid_break < 0)
> >                                       break;
> >
> >                               memcpy(&pedid_blocks_buf[offset],
> > --

Fixed commit id syntax of commit message in order to make checkpatch
--strict happy.

Applied to drm-misc-next.