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From:   Jernej Skrabec <jernej.skrabec@siol.net>
To:     maxime.ripard@bootlin.com, wens@csie.org
Cc:     robh+dt@kernel.org, sboyd@kernel.org, airlied@linux.ie,
        architt@codeaurora.org, a.hajda@samsung.com,
        Laurent.pinchart@ideasonboard.com, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-clk@vger.kernel.org, dri-devel@lists.freedesktop.org,
        linux-sunxi@googlegroups.com, Icenowy Zheng <icenowy@aosc.io>
Subject: [PATCH v2 25/29] drm: sun4i: add quirks for TCON TOP
Date:   Sun,  7 Oct 2018 11:39:01 +0200
Message-Id: <20181007093905.11253-26-jernej.skrabec@siol.net>
In-Reply-To: <20181007093905.11253-1-jernej.skrabec@siol.net>
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From: Icenowy Zheng <icenowy@aosc.io>

Some SoCs, such as H6, doesn't have a full-featured TCON TOP.

Add quirks support for TCON TOP.

Currently the presence of TCON_TV1 and DSI is controlled via the quirks
structure.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
 drivers/gpu/drm/sun4i/sun8i_tcon_top.c | 43 ++++++++++++++++++++------
 1 file changed, 34 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c b/drivers/gpu/drm/sun=
4i/sun8i_tcon_top.c
index 37158548b447..ed13233cad88 100644
--- a/drivers/gpu/drm/sun4i/sun8i_tcon_top.c
+++ b/drivers/gpu/drm/sun4i/sun8i_tcon_top.c
@@ -9,11 +9,17 @@
 #include <linux/component.h>
 #include <linux/device.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
=20
 #include "sun8i_tcon_top.h"
=20
+struct sun8i_tcon_top_quirks {
+	bool has_tcon_tv1;
+	bool has_dsi;
+};
+
 static bool sun8i_tcon_top_node_is_tcon_top(struct device_node *node)
 {
 	return !!of_match_node(sun8i_tcon_top_of_table, node);
@@ -121,10 +127,13 @@ static int sun8i_tcon_top_bind(struct device *dev, =
struct device *master,
 	struct platform_device *pdev =3D to_platform_device(dev);
 	struct clk_hw_onecell_data *clk_data;
 	struct sun8i_tcon_top *tcon_top;
+	const struct sun8i_tcon_top_quirks *quirks;
 	struct resource *res;
 	void __iomem *regs;
 	int ret, i;
=20
+	quirks =3D of_device_get_match_data(&pdev->dev);
+
 	tcon_top =3D devm_kzalloc(dev, sizeof(*tcon_top), GFP_KERNEL);
 	if (!tcon_top)
 		return -ENOMEM;
@@ -187,15 +196,23 @@ static int sun8i_tcon_top_bind(struct device *dev, =
struct device *master,
 					     &tcon_top->reg_lock,
 					     TCON_TOP_TCON_TV0_GATE, 0);
=20
-	clk_data->hws[CLK_TCON_TOP_TV1] =3D
-		sun8i_tcon_top_register_gate(dev, "tcon-tv1", regs,
-					     &tcon_top->reg_lock,
-					     TCON_TOP_TCON_TV1_GATE, 1);
+	if (quirks->has_tcon_tv1) {
+		clk_data->hws[CLK_TCON_TOP_TV1] =3D
+			sun8i_tcon_top_register_gate(dev, "tcon-tv1", regs,
+						     &tcon_top->reg_lock,
+						     TCON_TOP_TCON_TV1_GATE, 1);
+	} else {
+		clk_data->hws[CLK_TCON_TOP_TV1] =3D NULL;
+	}
=20
-	clk_data->hws[CLK_TCON_TOP_DSI] =3D
-		sun8i_tcon_top_register_gate(dev, "dsi", regs,
-					     &tcon_top->reg_lock,
-					     TCON_TOP_TCON_DSI_GATE, 2);
+	if (quirks->has_dsi) {
+		clk_data->hws[CLK_TCON_TOP_DSI] =3D
+			sun8i_tcon_top_register_gate(dev, "dsi", regs,
+						     &tcon_top->reg_lock,
+						     TCON_TOP_TCON_DSI_GATE, 2);
+	} else {
+		clk_data->hws[CLK_TCON_TOP_DSI] =3D NULL;
+	}
=20
 	for (i =3D 0; i < CLK_NUM; i++)
 		if (IS_ERR(clk_data->hws[i])) {
@@ -257,9 +274,17 @@ static int sun8i_tcon_top_remove(struct platform_dev=
ice *pdev)
 	return 0;
 }
=20
+const struct sun8i_tcon_top_quirks sun8i_r40_tcon_top_quirks =3D {
+	.has_tcon_tv1	=3D true,
+	.has_dsi	=3D true,
+};
+
 /* sun4i_drv uses this list to check if a device node is a TCON TOP */
 const struct of_device_id sun8i_tcon_top_of_table[] =3D {
-	{ .compatible =3D "allwinner,sun8i-r40-tcon-top" },
+	{
+		.compatible =3D "allwinner,sun8i-r40-tcon-top",
+		.data =3D &sun8i_r40_tcon_top_quirks
+	},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, sun8i_tcon_top_of_table);
--=20
2.19.0