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authorNeil Armstrong <narmstrong@baylibre.com>2020-09-15 14:19:12 +0200
committerNeil Armstrong <narmstrong@baylibre.com>2020-10-19 10:08:02 +0200
commitcf40c66005920a6d4932a1a259076459464adf32 (patch)
tree6bbab7ab73d9fdc174a3c26c25cc83df1236114b /drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
parent6e3a8664322564fc50f9c2b882e1a72b55bae2f1 (diff)
drm: panel: add TDO tl070wsh30 panel driver
This adds support for the TDO TL070WSH30 TFT-LCD panel module. The panel has a 1024×600 resolution and uses 24 bit RGB per pixel. It provides a MIPI DSI interface to the host, a built-in LED backlight and touch controller. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200915121912.4347-5-narmstrong@baylibre.com
Diffstat (limited to 'drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c')
-rw-r--r--drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c250
1 files changed, 250 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c b/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
new file mode 100644
index 000000000000..820731be7147
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <linux/delay.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 <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct tdo_tl070wsh30_panel {
+ struct drm_panel base;
+ struct mipi_dsi_device *link;
+
+ struct regulator *supply;
+ struct gpio_desc *reset_gpio;
+
+ bool prepared;
+};
+
+static inline
+struct tdo_tl070wsh30_panel *to_tdo_tl070wsh30_panel(struct drm_panel *panel)
+{
+ return container_of(panel, struct tdo_tl070wsh30_panel, base);
+}
+
+static int tdo_tl070wsh30_panel_prepare(struct drm_panel *panel)
+{
+ struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
+ int err;
+
+ if (tdo_tl070wsh30->prepared)
+ return 0;
+
+ err = regulator_enable(tdo_tl070wsh30->supply);
+ if (err < 0)
+ return err;
+
+ usleep_range(10000, 11000);
+
+ gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 1);
+
+ usleep_range(10000, 11000);
+
+ gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 0);
+
+ msleep(200);
+
+ err = mipi_dsi_dcs_exit_sleep_mode(tdo_tl070wsh30->link);
+ if (err < 0) {
+ dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
+ regulator_disable(tdo_tl070wsh30->supply);
+ return err;
+ }
+
+ msleep(200);
+
+ err = mipi_dsi_dcs_set_display_on(tdo_tl070wsh30->link);
+ if (err < 0) {
+ dev_err(panel->dev, "failed to set display on: %d\n", err);
+ regulator_disable(tdo_tl070wsh30->supply);
+ return err;
+ }
+
+ msleep(20);
+
+ tdo_tl070wsh30->prepared = true;
+
+ return 0;
+}
+
+static int tdo_tl070wsh30_panel_unprepare(struct drm_panel *panel)
+{
+ struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
+ int err;
+
+ if (!tdo_tl070wsh30->prepared)
+ return 0;
+
+ err = mipi_dsi_dcs_set_display_off(tdo_tl070wsh30->link);
+ if (err < 0)
+ dev_err(panel->dev, "failed to set display off: %d\n", err);
+
+ usleep_range(10000, 11000);
+
+ err = mipi_dsi_dcs_enter_sleep_mode(tdo_tl070wsh30->link);
+ if (err < 0) {
+ dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
+ return err;
+ }
+
+ usleep_range(10000, 11000);
+
+ regulator_disable(tdo_tl070wsh30->supply);
+
+ tdo_tl070wsh30->prepared = false;
+
+ return 0;
+}
+
+static const struct drm_display_mode default_mode = {
+ .clock = 47250,
+ .hdisplay = 1024,
+ .hsync_start = 1024 + 46,
+ .hsync_end = 1024 + 46 + 80,
+ .htotal = 1024 + 46 + 80 + 100,
+ .vdisplay = 600,
+ .vsync_start = 600 + 5,
+ .vsync_end = 600 + 5 + 5,
+ .vtotal = 600 + 5 + 5 + 20,
+ .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
+};
+
+static int tdo_tl070wsh30_panel_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(connector->dev, &default_mode);
+ if (!mode) {
+ dev_err(panel->dev, "failed to add mode %ux%u@%u\n",
+ default_mode.hdisplay, default_mode.vdisplay,
+ drm_mode_vrefresh(&default_mode));
+ return -ENOMEM;
+ }
+
+ drm_mode_set_name(mode);
+
+ drm_mode_probed_add(connector, mode);
+
+ connector->display_info.width_mm = 154;
+ connector->display_info.height_mm = 85;
+ connector->display_info.bpc = 8;
+
+ return 1;
+}
+
+static const struct drm_panel_funcs tdo_tl070wsh30_panel_funcs = {
+ .unprepare = tdo_tl070wsh30_panel_unprepare,
+ .prepare = tdo_tl070wsh30_panel_prepare,
+ .get_modes = tdo_tl070wsh30_panel_get_modes,
+};
+
+static const struct of_device_id tdo_tl070wsh30_of_match[] = {
+ { .compatible = "tdo,tl070wsh30", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, tdo_tl070wsh30_of_match);
+
+static int tdo_tl070wsh30_panel_add(struct tdo_tl070wsh30_panel *tdo_tl070wsh30)
+{
+ struct device *dev = &tdo_tl070wsh30->link->dev;
+ int err;
+
+ tdo_tl070wsh30->supply = devm_regulator_get(dev, "power");
+ if (IS_ERR(tdo_tl070wsh30->supply))
+ return PTR_ERR(tdo_tl070wsh30->supply);
+
+ tdo_tl070wsh30->reset_gpio = devm_gpiod_get(dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(tdo_tl070wsh30->reset_gpio)) {
+ err = PTR_ERR(tdo_tl070wsh30->reset_gpio);
+ dev_dbg(dev, "failed to get reset gpio: %d\n", err);
+ return err;
+ }
+
+ drm_panel_init(&tdo_tl070wsh30->base, &tdo_tl070wsh30->link->dev,
+ &tdo_tl070wsh30_panel_funcs, DRM_MODE_CONNECTOR_DSI);
+
+ err = drm_panel_of_backlight(&tdo_tl070wsh30->base);
+ if (err)
+ return err;
+
+ drm_panel_add(&tdo_tl070wsh30->base);
+
+ return 0;
+}
+
+static int tdo_tl070wsh30_panel_probe(struct mipi_dsi_device *dsi)
+{
+ struct tdo_tl070wsh30_panel *tdo_tl070wsh30;
+ int err;
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
+
+ tdo_tl070wsh30 = devm_kzalloc(&dsi->dev, sizeof(*tdo_tl070wsh30),
+ GFP_KERNEL);
+ if (!tdo_tl070wsh30)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, tdo_tl070wsh30);
+ tdo_tl070wsh30->link = dsi;
+
+ err = tdo_tl070wsh30_panel_add(tdo_tl070wsh30);
+ if (err < 0)
+ return err;
+
+ return mipi_dsi_attach(dsi);
+}
+
+static int tdo_tl070wsh30_panel_remove(struct mipi_dsi_device *dsi)
+{
+ struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
+ int err;
+
+ err = mipi_dsi_detach(dsi);
+ if (err < 0)
+ dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
+
+ drm_panel_remove(&tdo_tl070wsh30->base);
+ drm_panel_disable(&tdo_tl070wsh30->base);
+ drm_panel_unprepare(&tdo_tl070wsh30->base);
+
+ return 0;
+}
+
+static void tdo_tl070wsh30_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+ struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
+
+ drm_panel_disable(&tdo_tl070wsh30->base);
+ drm_panel_unprepare(&tdo_tl070wsh30->base);
+}
+
+static struct mipi_dsi_driver tdo_tl070wsh30_panel_driver = {
+ .driver = {
+ .name = "panel-tdo-tl070wsh30",
+ .of_match_table = tdo_tl070wsh30_of_match,
+ },
+ .probe = tdo_tl070wsh30_panel_probe,
+ .remove = tdo_tl070wsh30_panel_remove,
+ .shutdown = tdo_tl070wsh30_panel_shutdown,
+};
+module_mipi_dsi_driver(tdo_tl070wsh30_panel_driver);
+
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
+MODULE_DESCRIPTION("TDO TL070WSH30 panel driver");
+MODULE_LICENSE("GPL v2");