--- /dev/null
+/*
+ * i.MX drm driver - Raydium MIPI-DSI panel driver
+ *
+ * Copyright (C) 2017 NXP
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+#include <video/mipi_display.h>
+#include <video/of_videomode.h>
+#include <video/videomode.h>
+
+#define CMD_TABLE_LEN 2
+typedef u8 cmd_set_table[CMD_TABLE_LEN];
+
+/* Write Manufacture Command Set Control */
+#define WRMAUCCTR 0xFE
+
+/* Manufacturer Command Set pages (CMD2) */
+static const cmd_set_table manufacturer_cmd_set[] = {
+ {0xFE, 0x0B},
+ {0x28, 0x40},
+ {0x29, 0x4F},
+ {0xFE, 0x0E},
+ {0x4B, 0x00},
+ {0x4C, 0x0F},
+ {0x4D, 0x20},
+ {0x4E, 0x40},
+ {0x4F, 0x60},
+ {0x50, 0xA0},
+ {0x51, 0xC0},
+ {0x52, 0xE0},
+ {0x53, 0xFF},
+ {0xFE, 0x0D},
+ {0x18, 0x08},
+ {0x42, 0x00},
+ {0x08, 0x41},
+ {0x46, 0x02},
+ {0x72, 0x09},
+ {0xFE, 0x0A},
+ {0x24, 0x17},
+ {0x04, 0x07},
+ {0x1A, 0x0C},
+ {0x0F, 0x44},
+ {0xFE, 0x04},
+ {0x00, 0x0C},
+ {0x05, 0x08},
+ {0x06, 0x08},
+ {0x08, 0x08},
+ {0x09, 0x08},
+ {0x0A, 0xE6},
+ {0x0B, 0x8C},
+ {0x1A, 0x12},
+ {0x1E, 0xE0},
+ {0x29, 0x93},
+ {0x2A, 0x93},
+ {0x2F, 0x02},
+ {0x31, 0x02},
+ {0x33, 0x05},
+ {0x37, 0x2D},
+ {0x38, 0x2D},
+ {0x3A, 0x1E},
+ {0x3B, 0x1E},
+ {0x3D, 0x27},
+ {0x3F, 0x80},
+ {0x40, 0x40},
+ {0x41, 0xE0},
+ {0x4F, 0x2F},
+ {0x50, 0x1E},
+ {0xFE, 0x06},
+ {0x00, 0xCC},
+ {0x05, 0x05},
+ {0x07, 0xA2},
+ {0x08, 0xCC},
+ {0x0D, 0x03},
+ {0x0F, 0xA2},
+ {0x32, 0xCC},
+ {0x37, 0x05},
+ {0x39, 0x83},
+ {0x3A, 0xCC},
+ {0x41, 0x04},
+ {0x43, 0x83},
+ {0x44, 0xCC},
+ {0x49, 0x05},
+ {0x4B, 0xA2},
+ {0x4C, 0xCC},
+ {0x51, 0x03},
+ {0x53, 0xA2},
+ {0x75, 0xCC},
+ {0x7A, 0x03},
+ {0x7C, 0x83},
+ {0x7D, 0xCC},
+ {0x82, 0x02},
+ {0x84, 0x83},
+ {0x85, 0xEC},
+ {0x86, 0x0F},
+ {0x87, 0xFF},
+ {0x88, 0x00},
+ {0x8A, 0x02},
+ {0x8C, 0xA2},
+ {0x8D, 0xEA},
+ {0x8E, 0x01},
+ {0x8F, 0xE8},
+ {0xFE, 0x06},
+ {0x90, 0x0A},
+ {0x92, 0x06},
+ {0x93, 0xA0},
+ {0x94, 0xA8},
+ {0x95, 0xEC},
+ {0x96, 0x0F},
+ {0x97, 0xFF},
+ {0x98, 0x00},
+ {0x9A, 0x02},
+ {0x9C, 0xA2},
+ {0xAC, 0x04},
+ {0xFE, 0x06},
+ {0xB1, 0x12},
+ {0xB2, 0x17},
+ {0xB3, 0x17},
+ {0xB4, 0x17},
+ {0xB5, 0x17},
+ {0xB6, 0x11},
+ {0xB7, 0x08},
+ {0xB8, 0x09},
+ {0xB9, 0x06},
+ {0xBA, 0x07},
+ {0xBB, 0x17},
+ {0xBC, 0x17},
+ {0xBD, 0x17},
+ {0xBE, 0x17},
+ {0xBF, 0x17},
+ {0xC0, 0x17},
+ {0xC1, 0x17},
+ {0xC2, 0x17},
+ {0xC3, 0x17},
+ {0xC4, 0x0F},
+ {0xC5, 0x0E},
+ {0xC6, 0x00},
+ {0xC7, 0x01},
+ {0xC8, 0x10},
+ {0xFE, 0x0D},
+ {0x95, 0xEC},
+ {0x8D, 0xEE},
+ {0x44, 0xEC},
+ {0x4C, 0xEC},
+ {0x32, 0xEC},
+ {0x3A, 0xEC},
+ {0x7D, 0xEC},
+ {0x75, 0xEC},
+ {0x00, 0xEC},
+ {0x08, 0xEC},
+ {0x85, 0xEC},
+ {0xA6, 0x21},
+ {0xA7, 0x05},
+ {0xA9, 0x06},
+ {0x82, 0x06},
+ {0x41, 0x06},
+ {0x7A, 0x07},
+ {0x37, 0x07},
+ {0x05, 0x06},
+ {0x49, 0x06},
+ {0x0D, 0x04},
+ {0x51, 0x04},
+};
+
+struct rad_panel {
+ struct drm_panel base;
+ struct mipi_dsi_device *dsi;
+
+ struct gpio_desc *reset;
+ struct backlight_device *backlight;
+
+ bool prepared;
+ bool enabled;
+
+ struct videomode vm;
+ u32 width_mm;
+ u32 height_mm;
+};
+
+static inline struct rad_panel *to_rad_panel(struct drm_panel *panel)
+{
+ return container_of(panel, struct rad_panel, base);
+}
+
+static int rad_panel_push_cmd_list(struct mipi_dsi_device *dsi)
+{
+ size_t i;
+ const u8 *cmd;
+ size_t count = sizeof(manufacturer_cmd_set) / CMD_TABLE_LEN;
+ int ret = 0;
+
+ for (i = 0; i < count ; i++) {
+ cmd = manufacturer_cmd_set[i];
+ ret = mipi_dsi_generic_write(dsi, cmd, CMD_TABLE_LEN);
+ if (ret < 0)
+ return ret;
+ }
+
+ return ret;
+};
+
+static int rad_panel_prepare(struct drm_panel *panel)
+{
+ struct rad_panel *rad = to_rad_panel(panel);
+ struct mipi_dsi_device *dsi = rad->dsi;
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ if (rad->prepared)
+ return 0;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+ if (rad->reset != NULL) {
+ gpiod_set_value(rad->reset, 1);
+ msleep(100);
+ gpiod_set_value(rad->reset, 0);
+ msleep(100);
+ gpiod_set_value(rad->reset, 1);
+ msleep(100);
+ }
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ ret = rad_panel_push_cmd_list(dsi);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to send MCS (%d)\n", ret);
+ goto fail;
+ }
+
+ /* Select User Command Set table (CMD1) */
+ ret = mipi_dsi_generic_write(dsi, (u8[]){ WRMAUCCTR, 0x00 }, 2);
+ if (ret < 0)
+ goto fail;
+
+ /* Software reset */
+ ret = mipi_dsi_dcs_soft_reset(dsi);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to do Software Reset (%d)\n", ret);
+ goto fail;
+ }
+
+ msleep(100);
+
+ /* Set DSI mode */
+ ret = mipi_dsi_generic_write(dsi, (u8[]){ 0xC2, 0x0B }, 2);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to set DSI mode (%d)\n", ret);
+ goto fail;
+ }
+ /* Set tear ON */
+ ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to set tear ON (%d)\n", ret);
+ goto fail;
+ }
+ /* Set tear scanline */
+ ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x380);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to set tear scanline (%d)\n", ret);
+ goto fail;
+ }
+ /* Set pixel format to RGB888 */
+ ret = mipi_dsi_dcs_set_pixel_format(dsi, 0x77);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to set pixel format (%d)\n", ret);
+ goto fail;
+ }
+ /* Set display brightness */
+ ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x20);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to set display brightness (%d)\n",
+ ret);
+ goto fail;
+ }
+ /* Exit sleep mode */
+ ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to exit sleep mode (%d)\n", ret);
+ goto fail;
+ }
+
+ msleep(120);
+
+ ret = mipi_dsi_dcs_set_display_on(dsi);
+ if (ret < 0) {
+ DRM_DEV_ERROR(dev, "Failed to set display ON (%d)\n", ret);
+ goto fail;
+ }
+
+ msleep(100);
+
+ rad->prepared = true;
+
+ return 0;
+
+fail:
+ if (rad->reset != NULL)
+ gpiod_set_value(rad->reset, 0);
+
+ return ret;
+}
+
+static int rad_panel_unprepare(struct drm_panel *panel)
+{
+ struct rad_panel *rad = to_rad_panel(panel);
+ struct mipi_dsi_device *dsi = rad->dsi;
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ if (!rad->prepared)
+ return 0;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_off(dsi);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "Failed to set display OFF (%d)\n", ret);
+
+ usleep_range(5000, 10000);
+
+ ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "Failed to enter sleep mode (%d)\n", ret);
+
+ usleep_range(10000, 15000);
+
+ if (rad->reset != NULL) {
+ gpiod_set_value(rad->reset, 0);
+ usleep_range(10000, 15000);
+ }
+
+ rad->prepared = false;
+
+ return 0;
+}
+
+static int rad_panel_enable(struct drm_panel *panel)
+{
+ struct rad_panel *rad = to_rad_panel(panel);
+ struct device *dev = &rad->dsi->dev;
+
+ if (rad->enabled)
+ return 0;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+ rad->backlight->props.power = FB_BLANK_UNBLANK;
+ backlight_update_status(rad->backlight);
+
+ rad->enabled = true;
+
+ return 0;
+}
+
+static int rad_panel_disable(struct drm_panel *panel)
+{
+ struct rad_panel *rad = to_rad_panel(panel);
+ struct device *dev = &rad->dsi->dev;
+
+ if (!rad->enabled)
+ return 0;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+ rad->backlight->props.power = FB_BLANK_POWERDOWN;
+ backlight_update_status(rad->backlight);
+
+ rad->enabled = false;
+
+ return 0;
+}
+
+static int rad_panel_get_modes(struct drm_panel *panel)
+{
+ struct rad_panel *rad = to_rad_panel(panel);
+ struct device *dev = &rad->dsi->dev;
+ struct drm_connector *connector = panel->connector;
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_create(connector->dev);
+ if (!mode) {
+ DRM_DEV_ERROR(dev, "Failed to create display mode!\n");
+ return 0;
+ }
+
+ drm_display_mode_from_videomode(&rad->vm, mode);
+ mode->width_mm = rad->width_mm;
+ mode->height_mm = rad->height_mm;
+ connector->display_info.width_mm = rad->width_mm;
+ connector->display_info.height_mm = rad->height_mm;
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+
+ drm_mode_probed_add(panel->connector, mode);
+
+ return 1;
+}
+
+static int rad_bl_get_brightness(struct backlight_device *bl)
+{
+ struct mipi_dsi_device *dsi = bl_get_data(bl);
+ struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
+ struct device *dev = &dsi->dev;
+ u16 brightness;
+ int ret;
+
+ if (!rad->prepared)
+ return 0;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "\n");
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
+ if (ret < 0)
+ return ret;
+
+ bl->props.brightness = brightness;
+
+ return brightness & 0xff;
+}
+
+static int rad_bl_update_status(struct backlight_device *bl)
+{
+ struct mipi_dsi_device *dsi = bl_get_data(bl);
+ struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
+ struct device *dev = &dsi->dev;
+ int ret = 0;
+
+ if (!rad->prepared)
+ return 0;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "New brightness: %d\n", bl->props.brightness);
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static const struct backlight_ops rad_bl_ops = {
+ .update_status = rad_bl_update_status,
+ .get_brightness = rad_bl_get_brightness,
+};
+
+static const struct drm_panel_funcs rad_panel_funcs = {
+ .prepare = rad_panel_prepare,
+ .unprepare = rad_panel_unprepare,
+ .enable = rad_panel_enable,
+ .disable = rad_panel_disable,
+ .get_modes = rad_panel_get_modes,
+};
+
+/*
+ * The clock might range from 66MHz (30Hz refresh rate)
+ * to 132MHz (60Hz refresh rate)
+ */
+static const struct display_timing rad_default_timing = {
+ .pixelclock = { 66000000, 120000000, 132000000 },
+ .hactive = { 1080, 1080, 1080 },
+ .hfront_porch = { 20, 20, 20 },
+ .hsync_len = { 2, 2, 2 },
+ .hback_porch = { 34, 34, 34 },
+ .vactive = { 1920, 1920, 1920 },
+ .vfront_porch = { 10, 10, 10 },
+ .vsync_len = { 2, 2, 2 },
+ .vback_porch = { 4, 4, 4 },
+ .flags = DISPLAY_FLAGS_HSYNC_LOW |
+ DISPLAY_FLAGS_VSYNC_LOW |
+ DISPLAY_FLAGS_DE_LOW |
+ DISPLAY_FLAGS_PIXDATA_NEGEDGE,
+};
+
+static int rad_panel_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct device_node *np = dev->of_node;
+ struct rad_panel *panel;
+ struct backlight_properties bl_props;
+ int ret;
+
+ panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);
+ if (!panel)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, panel);
+
+ panel->dsi = dsi;
+
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+ ret = of_property_read_u32(np, "dsi-lanes", &dsi->lanes);
+ if (ret < 0) {
+ dev_err(dev, "Failed to get dsi-lanes property (%d)\n", ret);
+ return ret;
+ }
+
+ ret = of_get_videomode(np, &panel->vm, 0);
+ if (ret < 0)
+ videomode_from_timing(&rad_default_timing, &panel->vm);
+
+ of_property_read_u32(np, "panel-width-mm", &panel->width_mm);
+ of_property_read_u32(np, "panel-height-mm", &panel->height_mm);
+
+ panel->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+
+ if (IS_ERR(panel->reset))
+ panel->reset = NULL;
+
+ memset(&bl_props, 0, sizeof(bl_props));
+ bl_props.type = BACKLIGHT_RAW;
+ bl_props.brightness = 255;
+ bl_props.max_brightness = 255;
+
+ panel->backlight = devm_backlight_device_register(
+ dev, dev_name(dev),
+ dev, dsi,
+ &rad_bl_ops, &bl_props);
+ if (IS_ERR(panel->backlight)) {
+ ret = PTR_ERR(panel->backlight);
+ dev_err(dev, "Failed to register backlight (%d)\n", ret);
+ return ret;
+ }
+
+ drm_panel_init(&panel->base);
+ panel->base.funcs = &rad_panel_funcs;
+ panel->base.dev = dev;
+
+ ret = drm_panel_add(&panel->base);
+
+ if (ret < 0)
+ return ret;
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0)
+ drm_panel_remove(&panel->base);
+
+ return ret;
+}
+
+static int rad_panel_remove(struct mipi_dsi_device *dsi)
+{
+ struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ ret = rad_panel_disable(&rad->base);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "Failed to disable panel (%d)\n", ret);
+
+ ret = mipi_dsi_detach(dsi);
+ if (ret < 0)
+ DRM_DEV_ERROR(dev, "Failed to detach from host (%d)\n",
+ ret);
+
+ drm_panel_detach(&rad->base);
+
+ if (rad->base.dev)
+ drm_panel_remove(&rad->base);
+
+ return 0;
+}
+
+static void rad_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+ struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
+
+ rad_panel_disable(&rad->base);
+}
+
+static const struct of_device_id rad_of_match[] = {
+ { .compatible = "raydium,rm67191", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, rad_of_match);
+
+static struct mipi_dsi_driver rad_panel_driver = {
+ .driver = {
+ .name = "panel-raydium-rm67191",
+ .of_match_table = rad_of_match,
+ },
+ .probe = rad_panel_probe,
+ .remove = rad_panel_remove,
+ .shutdown = rad_panel_shutdown,
+};
+module_mipi_dsi_driver(rad_panel_driver);
+
+MODULE_AUTHOR("NXP Semiconductor");
+MODULE_DESCRIPTION("Raydium RM67191");
+MODULE_LICENSE("GPL v2");
projects / linux.git / commitdiff