Even though that mux is undocumented, it seems like it needs to be set to 1
when using composite, and 0 when using HDMI.
Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
Acked-by: Chen-Yu Tsai <wens@xxxxxxxx>
---
drivers/gpu/drm/sun4i/sun4i_tcon.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index a3fc6ab3c14b..74aa01e75e32 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -112,16 +112,23 @@ EXPORT_SYMBOL(sun4i_tcon_enable_vblank);
void sun4i_tcon_set_mux(struct sun4i_tcon *tcon, int channel,
struct drm_encoder *encoder)
{
+ u32 val;
+
if (!tcon->quirks->has_unknown_mux)
return;
if (channel != 1)
return;
+ if (encoder->encoder_type == DRM_MODE_ENCODER_TVDAC)
+ val = 1;
+ else
+ val = 0;
+
/*
* FIXME: Undocumented bits
*/
- regmap_write(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, 1);
+ regmap_write(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, val);
}
EXPORT_SYMBOL(sun4i_tcon_set_mux);
--
git-series 0.9.1
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