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.rip...@free-electrons.com>
---
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 0204d9fadb66..1c609d808b86 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -111,16 +111,23 @@ 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 0.8.11
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