--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Sharp LQ101R1SX01 DSI panel driver
+ *
+ * Copyright (C) 2014 NVIDIA Corporation
+ * Copyright (c) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <backlight.h>
+#include <dm.h>
+#include <panel.h>
+#include <log.h>
+#include <mipi_dsi.h>
+#include <linux/delay.h>
+#include <power/regulator.h>
+
+struct sharp_lq101r1sx01_priv {
+ struct udevice *backlight;
+ struct udevice *panel_sec;
+ struct udevice *vcc;
+};
+
+static struct display_timing default_timing = {
+ .pixelclock.typ = 278000000,
+ .hactive.typ = 2560,
+ .hfront_porch.typ = 128,
+ .hback_porch.typ = 64,
+ .hsync_len.typ = 64,
+ .vactive.typ = 1600,
+ .vfront_porch.typ = 4,
+ .vback_porch.typ = 8,
+ .vsync_len.typ = 32,
+};
+
+static int sharp_lq101r1sx01_write(struct mipi_dsi_device *dsi,
+ u16 offset, u8 value)
+{
+ u8 payload[3] = { offset >> 8, offset & 0xff, value };
+ int ret;
+
+ ret = mipi_dsi_generic_write(dsi, payload, sizeof(payload));
+ if (ret < 0) {
+ log_debug("%s: failed to write %02x to %04x: %zd\n",
+ __func__, value, offset, ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_nop(dsi);
+ if (ret < 0) {
+ log_debug("%s: failed to send DCS nop: %zd\n",
+ __func__, ret);
+ return ret;
+ }
+
+ udelay(20);
+
+ return 0;
+}
+
+static int sharp_setup_symmetrical_split(struct mipi_dsi_device *left,
+ struct mipi_dsi_device *right,
+ struct display_timing *timing)
+{
+ int ret;
+
+ ret = mipi_dsi_dcs_set_column_address(left, 0,
+ timing->hactive.typ / 2 - 1);
+ if (ret < 0) {
+ log_debug("%s: failed to set column address: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_set_page_address(left, 0, timing->vactive.typ - 1);
+ if (ret < 0) {
+ log_debug("%s: failed to set page address: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_set_column_address(right, timing->hactive.typ / 2,
+ timing->hactive.typ - 1);
+ if (ret < 0) {
+ log_debug("%s: failed to set column address: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_set_page_address(right, 0, timing->vactive.typ - 1);
+ if (ret < 0) {
+ log_debug("%s: failed to set page address: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int sharp_lq101r1sx01_enable_backlight(struct udevice *dev)
+{
+ struct sharp_lq101r1sx01_priv *priv = dev_get_priv(dev);
+
+ if (!priv->panel_sec)
+ return 0;
+
+ struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
+ struct mipi_dsi_panel_plat *plat_sec = dev_get_plat(priv->panel_sec);
+ struct mipi_dsi_device *link1 = plat->device;
+ struct mipi_dsi_device *link2 = plat_sec->device;
+ int ret;
+
+ ret = mipi_dsi_dcs_exit_sleep_mode(link1);
+ if (ret < 0) {
+ log_debug("%s: failed to exit sleep mode: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* set left-right mode */
+ ret = sharp_lq101r1sx01_write(link1, 0x1000, 0x2a);
+ if (ret < 0) {
+ log_debug("%s: failed to set left-right mode: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* enable command mode */
+ ret = sharp_lq101r1sx01_write(link1, 0x1001, 0x01);
+ if (ret < 0) {
+ log_debug("%s: failed to enable command mode: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_set_pixel_format(link1, MIPI_DCS_PIXEL_FMT_24BIT);
+ if (ret < 0) {
+ log_debug("%s: failed to set pixel format: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /*
+ * TODO: The device supports both left-right and even-odd split
+ * configurations, but this driver currently supports only the left-
+ * right split. To support a different mode a mechanism needs to be
+ * put in place to communicate the configuration back to the DSI host
+ * controller.
+ */
+ ret = sharp_setup_symmetrical_split(link1, link2, &default_timing);
+ if (ret < 0) {
+ log_debug("%s: failed to set up symmetrical split: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_set_display_on(link1);
+ if (ret < 0) {
+ log_debug("%s: failed to set panel on: %d\n",
+ __func__, ret);
+ return ret;
+ }
+ mdelay(20);
+
+ return 0;
+}
+
+static int sharp_lq101r1sx01_set_backlight(struct udevice *dev, int percent)
+{
+ struct sharp_lq101r1sx01_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ if (!priv->panel_sec)
+ return 0;
+
+ ret = backlight_enable(priv->backlight);
+ if (ret)
+ return ret;
+
+ return backlight_set_brightness(priv->backlight, percent);
+}
+
+static int sharp_lq101r1sx01_timings(struct udevice *dev,
+ struct display_timing *timing)
+{
+ memcpy(timing, &default_timing, sizeof(*timing));
+ return 0;
+}
+
+static int sharp_lq101r1sx01_of_to_plat(struct udevice *dev)
+{
+ struct sharp_lq101r1sx01_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ /* If node has no link2 it is secondary panel */
+ if (!dev_read_bool(dev, "link2"))
+ return 0;
+
+ ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev,
+ "link2", &priv->panel_sec);
+ if (ret) {
+ log_debug("%s: cannot get secondary panel: ret = %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
+ "backlight", &priv->backlight);
+ if (ret) {
+ log_debug("%s: cannot get backlight: ret = %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
+ "power-supply", &priv->vcc);
+ if (ret) {
+ log_debug("%s: cannot get power-supply: ret = %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int sharp_lq101r1sx01_hw_init(struct udevice *dev)
+{
+ struct sharp_lq101r1sx01_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ if (!priv->panel_sec)
+ return 0;
+
+ ret = regulator_set_enable_if_allowed(priv->vcc, 1);
+ if (ret) {
+ log_debug("%s: enabling power-supply failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /*
+ * According to the datasheet, the panel needs around 10 ms to fully
+ * power up. At least another 120 ms is required before exiting sleep
+ * mode to make sure the panel is ready. Throw in another 20 ms for
+ * good measure.
+ */
+ mdelay(150);
+
+ return 0;
+}
+
+static int sharp_lq101r1sx01_probe(struct udevice *dev)
+{
+ struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
+
+ /* fill characteristics of DSI data link */
+ plat->lanes = 4;
+ plat->format = MIPI_DSI_FMT_RGB888;
+
+ return sharp_lq101r1sx01_hw_init(dev);
+}
+
+static const struct panel_ops sharp_lq101r1sx01_ops = {
+ .enable_backlight = sharp_lq101r1sx01_enable_backlight,
+ .set_backlight = sharp_lq101r1sx01_set_backlight,
+ .get_display_timing = sharp_lq101r1sx01_timings,
+};
+
+static const struct udevice_id sharp_lq101r1sx01_ids[] = {
+ { .compatible = "sharp,lq101r1sx01" },
+ { }
+};
+
+U_BOOT_DRIVER(sharp_lq101r1sx01) = {
+ .name = "sharp_lq101r1sx01",
+ .id = UCLASS_PANEL,
+ .of_match = sharp_lq101r1sx01_ids,
+ .ops = &sharp_lq101r1sx01_ops,
+ .of_to_plat = sharp_lq101r1sx01_of_to_plat,
+ .probe = sharp_lq101r1sx01_probe,
+ .plat_auto = sizeof(struct mipi_dsi_panel_plat),
+ .priv_auto = sizeof(struct sharp_lq101r1sx01_priv),
+};
projects / u-boot.git / commitdiff
