linux-kernel - [PATCH 08/15] drm/sun4i: DE2 mixer: Add index quirk

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Date:   Sat, 19 May 2018 20:31:20 +0200
From:   Jernej Skrabec <jernej.skrabec@...l.net>
To:     maxime.ripard@...tlin.com, wens@...e.org, robh+dt@...nel.org
Cc:     mark.rutland@....com, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: [PATCH 08/15] drm/sun4i: DE2 mixer: Add index quirk

When TCON sets up TCON TOP, it needs to know mixer index. Here we do that
by setting engine ID to number provided in mixer index quirk.

Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
---
 drivers/gpu/drm/sun4i/sun8i_mixer.c | 4 ++--
 drivers/gpu/drm/sun4i/sun8i_mixer.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 126899d6f0d3..36d90c76317a 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -353,13 +353,13 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
 	dev_set_drvdata(dev, mixer);
 	mixer->engine.ops = &sun8i_engine_ops;
 	mixer->engine.node = dev->of_node;
-	/* The ID of the mixer currently doesn't matter */
-	mixer->engine.id = -1;
 
 	mixer->cfg = of_device_get_match_data(dev);
 	if (!mixer->cfg)
 		return -EINVAL;
 
+	mixer->engine.id = mixer->cfg->index;
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	regs = devm_ioremap_resource(dev, res);
 	if (IS_ERR(regs))
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index f34e70c42adf..aeda6e9a7627 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
@@ -123,6 +123,7 @@ struct de2_fmt_info {
  *	are invalid.
  * @mod_rate: module clock rate that needs to be set in order to have
  *	a functional block.
+ * @index: mixer index, needed to properly set TCON TOP
  */
 struct sun8i_mixer_cfg {
 	int		vi_num;
@@ -130,6 +131,7 @@ struct sun8i_mixer_cfg {
 	int		scaler_mask;
 	int		ccsc;
 	unsigned long	mod_rate;
+	int		index;
 };
 
 struct sun8i_mixer {
-- 
2.17.0