1 files changed, 328 insertions, 0 deletions

diff --git a/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
new file mode 100644
index 000000000000..3482e28e30fc
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c
@@ -0,0 +1,328 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mantix MLAF057WE51 5.7" MIPI-DSI panel driver
+ *
+ * Copyright (C) Purism SPC 2020
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+#define DRV_NAME "panel-mantix-mlaf057we51"
+
+/* Manufacturer specific Commands send via DSI */
+#define MANTIX_CMD_OTP_STOP_RELOAD_MIPI 0x41
+#define MANTIX_CMD_INT_CANCEL           0x4C
+
+struct mantix {
+	struct device *dev;
+	struct drm_panel panel;
+	struct gpio_desc *reset_gpio;
+
+	struct regulator *avdd;
+	struct regulator *avee;
+	struct regulator *vddi;
+};
+
+static inline struct mantix *panel_to_mantix(struct drm_panel *panel)
+{
+	return container_of(panel, struct mantix, panel);
+}
+
+#define dsi_generic_write_seq(dsi, seq...) do {				\
+		static const u8 d[] = { seq };				\
+		int ret;						\
+		ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d));	\
+		if (ret < 0)						\
+			return ret;					\
+	} while (0)
+
+static int mantix_init_sequence(struct mantix *ctx)
+{
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+	struct device *dev = ctx->dev;
+
+	/*
+	 * Init sequence was supplied by the panel vendor.
+	 */
+	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A);
+
+	dsi_generic_write_seq(dsi, MANTIX_CMD_INT_CANCEL, 0x03);
+	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x03);
+	dsi_generic_write_seq(dsi, 0x80, 0xA9, 0x00);
+
+	dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x09);
+	dsi_generic_write_seq(dsi, 0x80, 0x64, 0x00, 0x64, 0x00, 0x00);
+	msleep(20);
+
+	dev_dbg(dev, "Panel init sequence done\n");
+	return 0;
+}
+
+static int mantix_enable(struct drm_panel *panel)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+	struct device *dev = ctx->dev;
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
+	int ret;
+
+	ret = mantix_init_sequence(ctx);
+	if (ret < 0) {
+		dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+	if (ret < 0) {
+		dev_err(dev, "Failed to exit sleep mode\n");
+		return ret;
+	}
+	msleep(20);
+
+	ret = mipi_dsi_dcs_set_display_on(dsi);
+	if (ret)
+		return ret;
+	usleep_range(10000, 12000);
+
+	ret = mipi_dsi_turn_on_peripheral(dsi);
+	if (ret < 0) {
+		dev_err(dev, "Failed to turn on peripheral\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int mantix_disable(struct drm_panel *panel)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
+	int ret;
+
+	ret = mipi_dsi_dcs_set_display_off(dsi);
+	if (ret < 0)
+		dev_err(ctx->dev, "Failed to turn off the display: %d\n", ret);
+
+	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+	if (ret < 0)
+		dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);
+
+
+	return 0;
+}
+
+static int mantix_unprepare(struct drm_panel *panel)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+
+	regulator_disable(ctx->avee);
+	regulator_disable(ctx->avdd);
+	/* T11 */
+	usleep_range(5000, 6000);
+	regulator_disable(ctx->vddi);
+	/* T14 */
+	msleep(50);
+
+	return 0;
+}
+
+static int mantix_prepare(struct drm_panel *panel)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+	int ret;
+
+	/* Focaltech FT8006P, section 7.3.1 and 7.3.4 */
+	dev_dbg(ctx->dev, "Resetting the panel\n");
+	ret = regulator_enable(ctx->vddi);
+	if (ret < 0) {
+		dev_err(ctx->dev, "Failed to enable vddi supply: %d\n", ret);
+		return ret;
+	}
+
+	/* T1 + T2 */
+	usleep_range(8000, 10000);
+
+	ret = regulator_enable(ctx->avdd);
+	if (ret < 0) {
+		dev_err(ctx->dev, "Failed to enable avdd supply: %d\n", ret);
+		return ret;
+	}
+
+	/* T2d */
+	usleep_range(3500, 4000);
+	ret = regulator_enable(ctx->avee);
+	if (ret < 0) {
+		dev_err(ctx->dev, "Failed to enable avee supply: %d\n", ret);
+		return ret;
+	}
+
+	/* T3+T5 */
+	usleep_range(10000, 12000);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(5150, 7000);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+
+	/* T6 */
+	msleep(50);
+
+	return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+	.hdisplay    = 720,
+	.hsync_start = 720 + 45,
+	.hsync_end   = 720 + 45 + 14,
+	.htotal	     = 720 + 45 + 14 + 25,
+	.vdisplay    = 1440,
+	.vsync_start = 1440 + 130,
+	.vsync_end   = 1440 + 130 + 8,
+	.vtotal	     = 1440 + 130 + 8 + 106,
+	.clock	     = 85298,
+	.flags	     = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+	.width_mm    = 65,
+	.height_mm   = 130,
+};
+
+static int mantix_get_modes(struct drm_panel *panel,
+			    struct drm_connector *connector)
+{
+	struct mantix *ctx = panel_to_mantix(panel);
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(connector->dev, &default_mode);
+	if (!mode) {
+		dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
+			default_mode.hdisplay, default_mode.vdisplay,
+			drm_mode_vrefresh(mode));
+		return -ENOMEM;
+	}
+
+	drm_mode_set_name(mode);
+
+	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+	connector->display_info.width_mm = mode->width_mm;
+	connector->display_info.height_mm = mode->height_mm;
+	drm_mode_probed_add(connector, mode);
+
+	return 1;
+}
+
+static const struct drm_panel_funcs mantix_drm_funcs = {
+	.disable   = mantix_disable,
+	.unprepare = mantix_unprepare,
+	.prepare   = mantix_prepare,
+	.enable	   = mantix_enable,
+	.get_modes = mantix_get_modes,
+};
+
+static int mantix_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct mantix *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(ctx->reset_gpio)) {
+		dev_err(dev, "cannot get reset gpio\n");
+		return PTR_ERR(ctx->reset_gpio);
+	}
+
+	mipi_dsi_set_drvdata(dsi, ctx);
+	ctx->dev = dev;
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
+		MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
+
+	ctx->avdd = devm_regulator_get(dev, "avdd");
+	if (IS_ERR(ctx->avdd))
+		return dev_err_probe(dev, PTR_ERR(ctx->avdd), "Failed to request avdd regulator\n");
+
+	ctx->avee = devm_regulator_get(dev, "avee");
+	if (IS_ERR(ctx->avee))
+		return dev_err_probe(dev, PTR_ERR(ctx->avee), "Failed to request avee regulator\n");
+
+	ctx->vddi = devm_regulator_get(dev, "vddi");
+	if (IS_ERR(ctx->vddi))
+		return dev_err_probe(dev, PTR_ERR(ctx->vddi), "Failed to request vddi regulator\n");
+
+	drm_panel_init(&ctx->panel, dev, &mantix_drm_funcs,
+		       DRM_MODE_CONNECTOR_DSI);
+
+	ret = drm_panel_of_backlight(&ctx->panel);
+	if (ret)
+		return ret;
+
+	drm_panel_add(&ctx->panel);
+
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		dev_err(dev, "mipi_dsi_attach failed (%d). Is host ready?\n", ret);
+		drm_panel_remove(&ctx->panel);
+		return ret;
+	}
+
+	dev_info(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
+		 default_mode.hdisplay, default_mode.vdisplay,
+		 drm_mode_vrefresh(&default_mode),
+		 mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);
+
+	return 0;
+}
+
+static void mantix_shutdown(struct mipi_dsi_device *dsi)
+{
+	struct mantix *ctx = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_unprepare(&ctx->panel);
+	drm_panel_disable(&ctx->panel);
+}
+
+static int mantix_remove(struct mipi_dsi_device *dsi)
+{
+	struct mantix *ctx = mipi_dsi_get_drvdata(dsi);
+
+	mantix_shutdown(dsi);
+
+	mipi_dsi_detach(dsi);
+	drm_panel_remove(&ctx->panel);
+
+	return 0;
+}
+
+static const struct of_device_id mantix_of_match[] = {
+	{ .compatible = "mantix,mlaf057we51-x" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mantix_of_match);
+
+static struct mipi_dsi_driver mantix_driver = {
+	.probe	= mantix_probe,
+	.remove = mantix_remove,
+	.shutdown = mantix_shutdown,
+	.driver = {
+		.name = DRV_NAME,
+		.of_match_table = mantix_of_match,
+	},
+};
+module_mipi_dsi_driver(mantix_driver);
+
+MODULE_AUTHOR("Guido Günther <agx@sigxcpu.org>");
+MODULE_DESCRIPTION("DRM driver for Mantix MLAF057WE51-X MIPI DSI panel");
+MODULE_LICENSE("GPL v2");