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From:   Benjamin Gaignard <benjamin.gaignard@linaro.org>
Date:   Mon, 16 Sep 2019 15:16:05 +0200
Message-ID: <CA+M3ks56v__Lef4wN8KthoLoJ_yYYou8u+-PsJXSUVJQHaimdA@mail.gmail.com>
Subject: Re: [PATCH] drm/stm: dsi: higher pll out only in video burst mode
To:     =?UTF-8?Q?Yannick_Fertr=C3=A9?= <yannick.fertre@st.com>
Cc:     Philippe Cornu <philippe.cornu@st.com>,
        Benjamin Gaignard <benjamin.gaignard@st.com>,
        Vincent Abriou <vincent.abriou@st.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        ML dri-devel <dri-devel@lists.freedesktop.org>,
        linux-stm32@st-md-mailman.stormreply.com,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Le jeu. 12 sept. 2019 =C3=A0 10:57, Yannick Fertr=C3=A9 <yannick.fertre@st.=
com> a =C3=A9crit :
>
> In order to better support video non-burst modes,
> the +20% on pll out is added only in burst mode.
>
> Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
> Reviewed-by: Yannick FERTRE <yannick.fertre@st.com>

Applied on drm-misc-next,
Thanks,
Benjamin

> ---
>  drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/=
dw_mipi_dsi-stm.c
> index a03a642..514efef 100644
> --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
> @@ -260,8 +260,11 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const str=
uct drm_display_mode *mode,
>         /* Compute requested pll out */
>         bpp =3D mipi_dsi_pixel_format_to_bpp(format);
>         pll_out_khz =3D mode->clock * bpp / lanes;
> +
>         /* Add 20% to pll out to be higher than pixel bw (burst mode only=
) */
> -       pll_out_khz =3D (pll_out_khz * 12) / 10;
> +       if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
> +               pll_out_khz =3D (pll_out_khz * 12) / 10;
> +
>         if (pll_out_khz > dsi->lane_max_kbps) {
>                 pll_out_khz =3D dsi->lane_max_kbps;
>                 DRM_WARN("Warning max phy mbps is used\n");
> --
> 2.7.4
>
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