From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:27:49 +0200
Subject: Adding upstream version 6.6.15.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c | 88 +++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c

(limited to 'drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c')

diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
new file mode 100644
index 0000000000..d99afcc672
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/delay.h>
+
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_print.h>
+
+#include "panel-samsung-s6e63m0.h"
+
+static const u8 s6e63m0_dbi_read_commands[] = {
+	MCS_READ_ID1,
+	MCS_READ_ID2,
+	MCS_READ_ID3,
+	0, /* sentinel */
+};
+
+static int s6e63m0_spi_dcs_read(struct device *dev, void *trsp,
+				const u8 cmd, u8 *data)
+{
+	struct mipi_dbi *dbi = trsp;
+	int ret;
+
+	ret = mipi_dbi_command_read(dbi, cmd, data);
+	if (ret)
+		dev_err(dev, "error on DBI read command %02x\n", cmd);
+
+	return ret;
+}
+
+static int s6e63m0_spi_dcs_write(struct device *dev, void *trsp,
+				 const u8 *data, size_t len)
+{
+	struct mipi_dbi *dbi = trsp;
+	int ret;
+
+	ret = mipi_dbi_command_stackbuf(dbi, data[0], (data + 1), (len - 1));
+	usleep_range(300, 310);
+
+	return ret;
+}
+
+static int s6e63m0_spi_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct mipi_dbi *dbi;
+	int ret;
+
+	dbi = devm_kzalloc(dev, sizeof(*dbi), GFP_KERNEL);
+	if (!dbi)
+		return -ENOMEM;
+
+	ret = mipi_dbi_spi_init(spi, dbi, NULL);
+	if (ret)
+		return dev_err_probe(dev, ret, "MIPI DBI init failed\n");
+	/* Register our custom MCS read commands */
+	dbi->read_commands = s6e63m0_dbi_read_commands;
+
+	return s6e63m0_probe(dev, dbi, s6e63m0_spi_dcs_read,
+			     s6e63m0_spi_dcs_write, false);
+}
+
+static void s6e63m0_spi_remove(struct spi_device *spi)
+{
+	s6e63m0_remove(&spi->dev);
+}
+
+static const struct of_device_id s6e63m0_spi_of_match[] = {
+	{ .compatible = "samsung,s6e63m0" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, s6e63m0_spi_of_match);
+
+static struct spi_driver s6e63m0_spi_driver = {
+	.probe			= s6e63m0_spi_probe,
+	.remove			= s6e63m0_spi_remove,
+	.driver			= {
+		.name		= "panel-samsung-s6e63m0",
+		.of_match_table = s6e63m0_spi_of_match,
+	},
+};
+module_spi_driver(s6e63m0_spi_driver);
+
+MODULE_AUTHOR("Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>");
+MODULE_DESCRIPTION("s6e63m0 LCD SPI Driver");
+MODULE_LICENSE("GPL v2");
-- 
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