1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dc/dc-tc.c b/drivers/gpu/drm/imx/dc/dc-tc.c
new file mode 100644
index 000000000000..0bfd381b2cea
--- /dev/null
+++ b/drivers/gpu/drm/imx/dc/dc-tc.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2024 NXP
+ */
+
+#include <linux/component.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include "dc-drv.h"
+#include "dc-de.h"
+
+#define TCON_CTRL	0x410
+#define  CTRL_RST_VAL	0x01401408
+
+/* red: MAPBIT 29-20, green: MAPBIT 19-10, blue: MAPBIT 9-0 */
+#define MAPBIT3_0	0x418
+#define MAPBIT7_4	0x41c
+#define MAPBIT11_8	0x420
+#define MAPBIT15_12	0x424
+#define MAPBIT19_16	0x428
+#define MAPBIT23_20	0x42c
+#define MAPBIT27_24	0x430
+#define MAPBIT31_28	0x434
+
+static const struct dc_subdev_info dc_tc_info[] = {
+	{ .reg_start = 0x5618c800, .id = 0, },
+	{ .reg_start = 0x5618e400, .id = 1, },
+};
+
+static const struct regmap_range dc_tc_regmap_ranges[] = {
+	regmap_reg_range(TCON_CTRL, TCON_CTRL),
+	regmap_reg_range(MAPBIT3_0, MAPBIT31_28),
+};
+
+static const struct regmap_access_table dc_tc_regmap_access_table = {
+	.yes_ranges = dc_tc_regmap_ranges,
+	.n_yes_ranges = ARRAY_SIZE(dc_tc_regmap_ranges),
+};
+
+static const struct regmap_config dc_tc_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.fast_io = true,
+	.wr_table = &dc_tc_regmap_access_table,
+	.rd_table = &dc_tc_regmap_access_table,
+	.max_register = MAPBIT31_28,
+};
+
+/*
+ * The pixels reach TCON are always in 30-bit BGR format.
+ * The first bridge always receives pixels in 30-bit RGB format.
+ * So, map the format to MEDIA_BUS_FMT_RGB101010_1X30.
+ */
+static const u32 dc_tc_mapbit[] = {
+	0x17161514, 0x1b1a1918, 0x0b0a1d1c, 0x0f0e0d0c,
+	0x13121110, 0x03020100, 0x07060504, 0x00000908,
+};
+
+void dc_tc_init(struct dc_tc *tc)
+{
+	/* reset TCON_CTRL to POR default so that TCON works in bypass mode */
+	regmap_write(tc->reg, TCON_CTRL, CTRL_RST_VAL);
+
+	/* set format */
+	regmap_bulk_write(tc->reg, MAPBIT3_0, dc_tc_mapbit,
+			  ARRAY_SIZE(dc_tc_mapbit));
+}
+
+static int dc_tc_bind(struct device *dev, struct device *master, void *data)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dc_drm_device *dc_drm = data;
+	struct resource *res;
+	void __iomem *base;
+	struct dc_tc *tc;
+	int id;
+
+	tc = devm_kzalloc(dev, sizeof(*tc), GFP_KERNEL);
+	if (!tc)
+		return -ENOMEM;
+
+	base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	tc->reg = devm_regmap_init_mmio(dev, base, &dc_tc_regmap_config);
+	if (IS_ERR(tc->reg))
+		return PTR_ERR(tc->reg);
+
+	id = dc_subdev_get_id(dc_tc_info, ARRAY_SIZE(dc_tc_info), res);
+	if (id < 0) {
+		dev_err(dev, "failed to get instance number: %d\n", id);
+		return id;
+	}
+
+	tc->dev = dev;
+	dc_drm->tc[id] = tc;
+
+	return 0;
+}
+
+static const struct component_ops dc_tc_ops = {
+	.bind = dc_tc_bind,
+};
+
+static int dc_tc_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	ret = component_add(&pdev->dev, &dc_tc_ops);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "failed to add component\n");
+
+	return 0;
+}
+
+static void dc_tc_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &dc_tc_ops);
+}
+
+static const struct of_device_id dc_tc_dt_ids[] = {
+	{ .compatible = "fsl,imx8qxp-dc-tcon" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dc_tc_dt_ids);
+
+struct platform_driver dc_tc_driver = {
+	.probe = dc_tc_probe,
+	.remove = dc_tc_remove,
+	.driver = {
+		.name = "imx8-dc-tcon",
+		.suppress_bind_attrs = true,
+		.of_match_table = dc_tc_dt_ids,
+	},
+};