--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * DSI interface to the Samsung S6E63M0 panel.
+ * (C) 2019 Linus Walleij
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/of_device.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_print.h>
+
+#include "panel-samsung-s6e63m0.h"
+
+#define MCS_GLOBAL_PARAM 0xb0
+#define S6E63M0_DSI_MAX_CHUNK 15 /* CMD + 15 bytes max */
+
+static int s6e63m0_dsi_dcs_write(struct device *dev, const u8 *data, size_t len)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
+ const u8 *seqp = data;
+ u8 cmd;
+ u8 cmdwritten;
+ int remain;
+ int chunk;
+ int ret;
+
+ DRM_DEV_INFO(dev, "DSI writing dcs seq: %*ph\n", (int)len, data);
+
+ /* Pick out and skip past the DCS command */
+ cmd = *seqp;
+ seqp++;
+ cmdwritten = 0;
+ remain = len - 1;
+ chunk = remain;
+
+ /* Send max S6E63M0_DSI_MAX_CHUNK bytes at a time */
+ if (chunk > S6E63M0_DSI_MAX_CHUNK)
+ chunk = S6E63M0_DSI_MAX_CHUNK;
+ ret = mipi_dsi_dcs_write(dsi, cmd, seqp, chunk);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev,
+ "error sending DCS command seq cmd %02x\n",
+ cmd);
+ return ret;
+ }
+ cmdwritten += chunk;
+ seqp += chunk;
+
+ while (cmdwritten < remain) {
+ chunk = remain - cmdwritten;
+ if (chunk > S6E63M0_DSI_MAX_CHUNK)
+ chunk = S6E63M0_DSI_MAX_CHUNK;
+ ret = mipi_dsi_dcs_write(dsi, MCS_GLOBAL_PARAM, &cmdwritten, 1);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev,
+ "error sending CMD %02x global param %02x\n",
+ cmd, cmdwritten);
+ return ret;
+ }
+ ret = mipi_dsi_dcs_write(dsi, cmd, seqp, chunk);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev,
+ "error sending CMD %02x chunk\n",
+ cmd);
+ return ret;
+ }
+ cmdwritten += chunk;
+ seqp += chunk;
+ }
+ DRM_DEV_INFO(dev, "sent command %02x %02x bytes\n",
+ cmd, cmdwritten);
+
+ usleep_range(8000, 9000);
+
+ return 0;
+}
+
+static int s6e63m0_dsi_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ dsi->lanes = 2;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->hs_rate = 349440000;
+ dsi->lp_rate = 9600000;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_EOT_PACKET |
+ MIPI_DSI_MODE_VIDEO_BURST;
+
+ ret = s6e63m0_probe(dev, s6e63m0_dsi_dcs_write, true);
+ if (ret)
+ return ret;
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0)
+ s6e63m0_remove(dev);
+
+ return ret;
+}
+
+static int s6e63m0_dsi_remove(struct mipi_dsi_device *dsi)
+{
+ mipi_dsi_detach(dsi);
+ return s6e63m0_remove(&dsi->dev);
+}
+
+static const struct of_device_id s6e63m0_dsi_of_match[] = {
+ { .compatible = "samsung,s6e63m0" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, s6e63m0_dsi_of_match);
+
+static struct mipi_dsi_driver s6e63m0_dsi_driver = {
+ .probe = s6e63m0_dsi_probe,
+ .remove = s6e63m0_dsi_remove,
+ .driver = {
+ .name = "panel-samsung-s6e63m0",
+ .of_match_table = s6e63m0_dsi_of_match,
+ },
+};
+module_mipi_dsi_driver(s6e63m0_dsi_driver);
+
+MODULE_AUTHOR("Linus Walleij <linusw@kernel.org>");
+MODULE_DESCRIPTION("s6e63m0 LCD DSI Driver");
+MODULE_LICENSE("GPL v2");
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