drm/sun4i: Set the coef_rdy bit right after the coef have been set

The COEF_RDY bit is used to tell the hardware that new FIR filters
coefficients have been written to the registers and that the hardware
should take them into account starting next frame.

Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190118145133.21281-20-paul.kocialkowski@bootlin.com

diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.c b/drivers/gpu/drm/sun4i/sun4i_frontend.c
index 6636b1998a76da44db7d2d4489ddce4f6b9c63b1..7a1095b004d4c0015100d4708c35924cedfaf22d 100644 (file)
--- a/drivers/gpu/drm/sun4i/sun4i_frontend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_frontend.c
@@ -96,6 +96,10 @@ static void sun4i_frontend_scaler_init(struct sun4i_frontend *frontend)
                             sun4i_frontend_vert_coef[i]);
        }
 
+       regmap_write_bits(frontend->regs,
+                         SUN4I_FRONTEND_FRM_CTRL_REG,
+                         SUN4I_FRONTEND_FRM_CTRL_COEF_RDY,
+                         SUN4I_FRONTEND_FRM_CTRL_COEF_RDY);
 }
 
 int sun4i_frontend_init(struct sun4i_frontend *frontend)