[RFC 4/4] drm/sun4i: Update mixer's internal registers after initialization

roman.stratiienko
2019-12-28T20:29:53Z

From: Roman Stratiienko <roman.stratiienko@globallogic.com>

At system start blink of u-boot ghost framebuffer can be observed.
Fix it.

Signed-off-by: Roman Stratiienko <roman.stratiienko@globallogic.com>
---
drivers/gpu/drm/sun4i/sun8i_mixer.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index da84fccf7784..b906b8cc464e 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -588,6 +588,9 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
regmap_update_bits(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK, 0);

+ regmap_write(mixer->engine.regs, SUN8I_MIXER_GLOBAL_DBUFF,
+ SUN8I_MIXER_GLOBAL_DBUFF_ENABLE);
+
return 0;

err_disable_bus_clk:
--
2.17.1