[PATCH v3.1 5/5] drm: rcar-du: dsi: Fix VCLKSET write

[Tomi Valkeinen]

From: Tomi Valkeinen <tomi.valkeinen+renesas at ideasonboard.com>

rcar_mipi_dsi_startup() writes correct values to VCLKSET, but as it uses
or-operation to add the new values to the current value in the register,
it should first make sure the fields are cleared.

Do this by using rcar_mipi_dsi_write() to write the VCLKSET register
with a variable that has all the unused bits zeroed.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas at ideasonboard.com>
---
 drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c
index 06250f2f3499..90128d5e3d17 100644
--- a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c
+++ b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c
@@ -414,7 +414,7 @@ static int rcar_mipi_dsi_startup(struct rcar_mipi_dsi *dsi,
 
 	/* Enable DOT clock */
 	vclkset = VCLKSET_CKEN;
-	rcar_mipi_dsi_set(dsi, VCLKSET, vclkset);
+	rcar_mipi_dsi_write(dsi, VCLKSET, vclkset);
 
 	if (dsi_format == 24)
 		vclkset |= VCLKSET_BPP_24;
@@ -429,7 +429,7 @@ static int rcar_mipi_dsi_startup(struct rcar_mipi_dsi *dsi,
 	vclkset |= VCLKSET_COLOR_RGB | VCLKSET_DIV(setup_info.div)
 		|  VCLKSET_LANE(dsi->lanes - 1);
 
-	rcar_mipi_dsi_set(dsi, VCLKSET, vclkset);
+	rcar_mipi_dsi_write(dsi, VCLKSET, vclkset);
 
 	/* After setting VCLKSET register, enable VCLKEN */
 	rcar_mipi_dsi_set(dsi, VCLKEN, VCLKEN_CKEN);
-- 
2.34.1