linux-kernel - Re: [PATCH] drm/stm: dsi: higher pll out only in video burst mode

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Date:   Mon, 16 Sep 2019 15:16:05 +0200
From:   Benjamin Gaignard <benjamin.gaignard@...aro.org>
To:     Yannick Fertré <yannick.fertre@...com>
Cc:     Philippe Cornu <philippe.cornu@...com>,
        Benjamin Gaignard <benjamin.gaignard@...com>,
        Vincent Abriou <vincent.abriou@...com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        ML dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-stm32@...md-mailman.stormreply.com,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/stm: dsi: higher pll out only in video burst mode

Le jeu. 12 sept. 2019 à 10:57, Yannick Fertré <yannick.fertre@...com> a écrit :
>
> 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@...com>
> Reviewed-by: Yannick FERTRE <yannick.fertre@...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 struct drm_display_mode *mode,
>         /* Compute requested pll out */
>         bpp = mipi_dsi_pixel_format_to_bpp(format);
>         pll_out_khz = mode->clock * bpp / lanes;
> +
>         /* Add 20% to pll out to be higher than pixel bw (burst mode only) */
> -       pll_out_khz = (pll_out_khz * 12) / 10;
> +       if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
> +               pll_out_khz = (pll_out_khz * 12) / 10;
> +
>         if (pll_out_khz > dsi->lane_max_kbps) {
>                 pll_out_khz = dsi->lane_max_kbps;
>                 DRM_WARN("Warning max phy mbps is used\n");
> --
> 2.7.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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