[v5,19/23] drm/sun4i: Set the coef_rdy bit right after the coef have been set

Submitted by Paul Kocialkowski on Jan. 18, 2019, 2:43 p.m.

Details

Message ID 20190118144328.20649-20-paul.kocialkowski@bootlin.com
State New
Headers show
Series "drm/sun4i: Support for linear and tiled YUV formats with the frontend" ( rev: 4 ) in DRI devel

Not browsing as part of any series.

Commit Message

Paul Kocialkowski Jan. 18, 2019, 2:43 p.m.
From: Maxime Ripard <maxime.ripard@bootlin.com>

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.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 drivers/gpu/drm/sun4i/sun4i_frontend.c | 4 ++++
 1 file changed, 4 insertions(+)

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diff --git a/drivers/gpu/drm/sun4i/sun4i_frontend.c b/drivers/gpu/drm/sun4i/sun4i_frontend.c
index 6636b1998a76..7a1095b004d4 100644
--- 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)