linux-kernel - Re: [PATCH v1 5/5] drm/bridge: tc358768: Correct BTACNTRL1 programming

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Message-ID: <CAG3jFytesDqy8B43VWL46_47sOWkisrp7ytF33X2aU6wP=mjoQ@mail.gmail.com>
Date:   Tue, 19 Oct 2021 11:38:12 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Maxim Schwalm <maxim.schwalm@...il.com>,
        Andreas Westman Dorcsak <hedmoo@...oo.com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-tegra@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 5/5] drm/bridge: tc358768: Correct BTACNTRL1 programming

On Sun, 3 Oct 2021 at 01:35, Dmitry Osipenko <digetx@...il.com> wrote:
>
> TXTAGOCNT and RXTASURECNT bitfields of BTACNTRL1 register are swapped in
> the code, correct them. Driver doesn't implement low power mode for now,
> so this change doesn't make a practical difference yet.
>
> Tested-by: Andreas Westman Dorcsak <hedmoo@...oo.com> # Asus TF700T
> Tested-by: Maxim Schwalm <maxim.schwalm@...il.com> #TF700T
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/gpu/drm/bridge/tc358768.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c
> index cfceba5ef3b8..fd585bf925fe 100644
> --- a/drivers/gpu/drm/bridge/tc358768.c
> +++ b/drivers/gpu/drm/bridge/tc358768.c
> @@ -790,7 +790,7 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge)
>         val = tc358768_ns_to_cnt(val, dsibclk_nsk) - 1;
>         val2 = tc358768_ns_to_cnt(tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk),
>                                   dsibclk_nsk) - 2;
> -       val |= val2 << 16;
> +       val = val << 16 | val2;
>         dev_dbg(priv->dev, "BTACNTRL1: 0x%x\n", val);
>         tc358768_write(priv, TC358768_BTACNTRL1, val);
>

Reviewed-by: Robert Foss <robert.foss@...aro.org>