drm/omap: dsi: enable HS before sending the frame

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@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-70-tomi.valkeinen@ti.com

diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
index 6d97ca0..fb21b32 100644 (file)
--- a/drivers/gpu/drm/omapdrm/dss/dsi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -3915,6 +3915,8 @@ 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