[PATCH 15/19] video: sunxi: de2: switch to DT probing

[Jernej Skrabec]

Currently DE2 driver is probed via driver info. Switch probing to device
tree compatible string method.

Display is now searched via driver name which has same limitation as
previous method. This can be improved only when all drivers in chain are
probed via device tree compatible strings.

Signed-off-by: Jernej Skrabec <jernej.skrabec at siol.net>
---
 drivers/video/sunxi/sunxi_de2.c | 88 +++++++++++++++++++--------------
 1 file changed, 52 insertions(+), 36 deletions(-)

diff --git a/drivers/video/sunxi/sunxi_de2.c b/drivers/video/sunxi/sunxi_de2.c
index e02d359cd259..81576e45e9ef 100644
--- a/drivers/video/sunxi/sunxi_de2.c
+++ b/drivers/video/sunxi/sunxi_de2.c
@@ -31,6 +31,11 @@ enum {
 	LCD_MAX_LOG2_BPP	= VIDEO_BPP32,
 };
 
+struct sunxi_de2_data {
+	int id;
+	const char *disp_drv_name;
+};
+
 static void sunxi_de2_composer_init(void)
 {
 	struct sunxi_ccm_reg * const ccm =
@@ -228,51 +233,34 @@ static int sunxi_de2_init(struct udevice *dev, ulong fbbase,
 
 static int sunxi_de2_probe(struct udevice *dev)
 {
+	const struct sunxi_de2_data *data =
+		(const struct sunxi_de2_data *)dev_get_driver_data(dev);
 	struct video_uc_plat *plat = dev_get_uclass_plat(dev);
 	struct udevice *disp;
-	int ret;
+	int ret, index = 0;
 
 	/* Before relocation we don't need to do anything */
 	if (!(gd->flags & GD_FLG_RELOC))
 		return 0;
 
-	ret = uclass_get_device_by_driver(UCLASS_DISPLAY,
-					  DM_DRIVER_GET(sunxi_lcd), &disp);
-	if (!ret) {
-		int mux;
+	while (!(ret = uclass_get_device(UCLASS_DISPLAY, index++, &disp))) {
+		if (strcmp(disp->driver->name, data->disp_drv_name))
+			continue;
 
-		mux = 0;
+		ret = sunxi_de2_init(dev, plat->base, VIDEO_BPP32, disp,
+				     data->id, false);
+		if (ret)
+			return ret;
 
-		ret = sunxi_de2_init(dev, plat->base, VIDEO_BPP32, disp, mux,
-				     false);
-		if (!ret) {
-			video_set_flush_dcache(dev, 1);
-			return 0;
-		}
-	}
-
-	debug("%s: lcd display not found (ret=%d)\n", __func__, ret);
-
-	ret = uclass_get_device_by_driver(UCLASS_DISPLAY,
-					  DM_DRIVER_GET(sunxi_dw_hdmi), &disp);
-	if (!ret) {
-		int mux;
-		if (IS_ENABLED(CONFIG_MACH_SUNXI_H3_H5))
-			mux = 0;
-		else
-			mux = 1;
+		video_set_flush_dcache(dev, 1);
 
-		ret = sunxi_de2_init(dev, plat->base, VIDEO_BPP32, disp, mux,
-				     false);
-		if (!ret) {
-			video_set_flush_dcache(dev, 1);
-			return 0;
-		}
+		return 0;
 	}
 
-	debug("%s: hdmi display not found (ret=%d)\n", __func__, ret);
+	debug("%s: %s not found (ret=%d)\n", __func__,
+	      data->disp_drv_name, ret);
 
-	return -ENODEV;
+	return ret;
 }
 
 static int sunxi_de2_bind(struct udevice *dev)
@@ -285,22 +273,50 @@ static int sunxi_de2_bind(struct udevice *dev)
 	return 0;
 }
 
+const struct sunxi_de2_data h3_mixer_0 = {
+	.id = 0,
+	.disp_drv_name = "sunxi_dw_hdmi",
+};
+
+const struct sunxi_de2_data a64_mixer_0 = {
+	.id = 0,
+	.disp_drv_name = "sunxi_lcd",
+};
+
+const struct sunxi_de2_data a64_mixer_1 = {
+	.id = 1,
+	.disp_drv_name = "sunxi_dw_hdmi",
+};
+
+static const struct udevice_id sunxi_de2_ids[] = {
+	{
+		.compatible = "allwinner,sun8i-h3-de2-mixer-0",
+		.data = (ulong)&h3_mixer_0,
+	},
+	{
+		.compatible = "allwinner,sun50i-a64-de2-mixer-0",
+		.data = (ulong)&a64_mixer_0,
+	},
+	{
+		.compatible = "allwinner,sun50i-a64-de2-mixer-1",
+		.data = (ulong)&a64_mixer_1,
+	},
+	{ }
+};
+
 static const struct video_ops sunxi_de2_ops = {
 };
 
 U_BOOT_DRIVER(sunxi_de2) = {
 	.name	= "sunxi_de2",
 	.id	= UCLASS_VIDEO,
+	.of_match = sunxi_de2_ids,
 	.ops	= &sunxi_de2_ops,
 	.bind	= sunxi_de2_bind,
 	.probe	= sunxi_de2_probe,
 	.flags	= DM_FLAG_PRE_RELOC,
 };
 
-U_BOOT_DRVINFO(sunxi_de2) = {
-	.name = "sunxi_de2"
-};
-
 /*
  * Simplefb support.
  */
-- 
2.30.1