drm/stm: dsi: higher pll out only in video burst mode
diff mbox series

Message ID 1568278589-20400-1-git-send-email-yannick.fertre@st.com
State New
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Series
  • drm/stm: dsi: higher pll out only in video burst mode
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Commit Message

Yannick Fertre Sept. 12, 2019, 8:56 a.m. UTC
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>
---
 drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Benjamin Gaignard Sept. 16, 2019, 1:16 p.m. UTC | #1
Le jeu. 12 sept. 2019 à 10:57, Yannick Fertré <yannick.fertre@st.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@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 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
>
> _______________________________________________
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> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

Patch
diff mbox series

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");