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drm/sun4i: tcon: Switch mux on only for composite

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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@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Maxime Ripard 2017-05-27 18:09:28 +02:00
parent f8c73f4f02
commit b7cb9b9143
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/sun4i/sun4i_tcon.c
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@ -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);