[PATCH v5 14/29] drm/omap: dsi: enable HS before sending the frame

[Laurent Pinchart]

Hi Tomi,

Thank you for the patch.

On Tue, Dec 08, 2020 at 02:28:40PM +0200, Tomi Valkeinen wrote:
> We currently use a single VC for sending commands and pixel data. The
> LP/HS mode for pixel data is correctly set to HS by accident, as we have
> set the VC to HS already earlier.
> 
> However, if we use a different VC for video data, the VC is in LP mode.
> Fix this by always enabling HS mode before starting a frame update.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

> ---
>  drivers/gpu/drm/omapdrm/dss/dsi.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index 544f5f1eed91..9d210a020916 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -3918,6 +3918,8 @@ static int dsi_update_channel(struct omap_dss_device *dssdev, int vc)
>  
>  	dsi_set_ulps_auto(dsi, false);
>  
> +	dsi_vc_enable_hs(dssdev, vc, true);
> +
>  	/*
>  	 * Send NOP between the frames. If we don't send something here, the
>  	 * updates stop working. This is probably related to DSI spec stating

-- 
Regards,

Laurent Pinchart