Thread (46 messages) 46 messages, 6 authors, 2017-05-03
STALE3334d
Revisions (4)
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[PATCH 10/15] drm/sun4i: tcon: Switch mux on only for composite

From: Maxime Ripard <hidden>
Date: 2017-03-07 09:11:01
Also in: dri-devel, linux-clk, linux-devicetree, lkml
Subsystem: drm drivers, drm drivers and misc gpu patches, drm drivers for allwinner a10, the rest · Maintainers: David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Chen-Yu Tsai, Linus Torvalds

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 <redacted>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index d2335f109601..93249c5ab1e4 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -268,11 +268,16 @@ void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon, struct drm_encoder *encoder,
 			   SUN4I_TCON_GCTL_IOMAP_MASK,
 			   SUN4I_TCON_GCTL_IOMAP_TCON1);
 
+	if (encoder->encoder_type == DRM_MODE_ENCODER_TVDAC)
+		val = 1;
+	else
+		val = 0;
+
 	/*
 	 * FIXME: Undocumented bits
 	 */
 	if (tcon->quirks->has_unknown_mux)
-		regmap_write(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, 1);
+		regmap_write(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, val);
 }
 EXPORT_SYMBOL(sun4i_tcon1_mode_set);
 
-- 
git-series 0.8.11
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