[PATCH 1/2] drm/bridge: lt9211: Do not generate HFP/HBP/HSA and EOT packet

[Robert Foss]

On Tue, Apr 4, 2023 at 12:13 AM Marek Vasut <marex at denx.de> wrote:
>
> Do not generate the HS front and back porch gaps, the HSA gap and
> EOT packet, as these packets are not required. This makes the bridge
> work with Samsung DSIM on i.MX8MM and i.MX8MP.
>
> Signed-off-by: Marek Vasut <marex at denx.de>
> ---
> Cc: Andrzej Hajda <andrzej.hajda at intel.com>
> Cc: Daniel Vetter <daniel at ffwll.ch>
> Cc: David Airlie <airlied at gmail.com>
> Cc: Jagan Teki <jagan at amarulasolutions.com>
> Cc: Jernej Skrabec <jernej.skrabec at gmail.com>
> Cc: Jonas Karlman <jonas at kwiboo.se>
> Cc: Laurent Pinchart <Laurent.pinchart at ideasonboard.com>
> Cc: Michael Walle <michael at walle.cc>
> Cc: Neil Armstrong <neil.armstrong at linaro.org>
> Cc: Robert Foss <rfoss at kernel.org>
> Cc: dri-devel at lists.freedesktop.org
> ---
>  drivers/gpu/drm/bridge/lontium-lt9211.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/lontium-lt9211.c b/drivers/gpu/drm/bridge/lontium-lt9211.c
> index 3e19fff6547a2..00db681512385 100644
> --- a/drivers/gpu/drm/bridge/lontium-lt9211.c
> +++ b/drivers/gpu/drm/bridge/lontium-lt9211.c
> @@ -709,7 +709,9 @@ static int lt9211_host_attach(struct lt9211 *ctx)
>         dsi->lanes = dsi_lanes;
>         dsi->format = MIPI_DSI_FMT_RGB888;
>         dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> -                         MIPI_DSI_MODE_VIDEO_HSE;
> +                         MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO_NO_HSA |
> +                         MIPI_DSI_MODE_VIDEO_NO_HFP | MIPI_DSI_MODE_VIDEO_NO_HBP |
> +                         MIPI_DSI_MODE_NO_EOT_PACKET;
>
>         ret = devm_mipi_dsi_attach(dev, dsi);
>         if (ret < 0) {
> --
> 2.39.2
>


Reviewed-by: Robert Foss <rfoss at kernel.org>

Snoozing this patch for a week before applying.