[PATCH v4 3/3] drm/panel-fannal-c3004: Add fannal c3004 DSI panel
From: Paulo Pavacic
Date: Wed Jun 07 2023 - 11:11:52 EST
Fannal C3004 is a 480x800 display made by fannal that requires
DCS initialization sequences.
Signed-off-by: Paulo Pavacic <pavacic.p@xxxxxxxxx>
---
v4 changelog:
- removal of blank lines, code wrapping changes
- reset pin initialization handling changes
v3 changelog:
- formatting and style changes
- remove BIT_NONEXCLUSIVE flag from reset pin
- use dev_err_probe instead of dev_err
v2 changelog:
- using generic mipi_dsi_dcs_write_seq
- removed success prints
- removed some comments
- simplified code/removed support for different panels
- changed namespace from fann to fannal
v1 changelog:
- renamed from panel-mipi-dsi-bringup
- only one MAINTAINER e-mail
---
MAINTAINERS | 1 +
drivers/gpu/drm/panel/Kconfig | 11 +
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-fannal-c3004.c | 314 +++++++++++++++++++++
4 files changed, 327 insertions(+)
create mode 100644 drivers/gpu/drm/panel/panel-fannal-c3004.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 978133f87c5e..7ad37ecd7e09 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6431,6 +6431,7 @@ DRM DRIVER FOR FANNAL C3004373132019A
M: Paulo Pavacic <pavacic.p@xxxxxxxxx>
S: Maintained
F: Documentation/devicetree/bindings/display/panel/panel-fannal,c3004.yaml
+F: drivers/gpu/drm/panel/panel-fannal-c3004.c
DRM DRIVER FOR FARADAY TVE200 TV ENCODER
M: Linus Walleij <linus.walleij@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 2b9d6db7860b..a1041c1e6bf6 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -144,6 +144,17 @@ config DRM_PANEL_ELIDA_KD35T133
KD35T133 controller for 320x480 LCD panels with MIPI-DSI
system interfaces.
+config DRM_PANEL_FANNAL_C3004
+ tristate "Fannal C3004 panel"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ help
+ Say Y here if you want to enable support for the Fannal C3004
+ 2-lane 480x800 MIPI DSI panel which requires initialization
+ sequence.
+
+ If M is selected the module will be called panel-fannal-c3004.
+
config DRM_PANEL_FEIXIN_K101_IM2BA02
tristate "Feixin K101 IM2BA02 panel"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index ff169781e82d..13c0f00038b5 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
obj-$(CONFIG_DRM_PANEL_EDP) += panel-edp.o
obj-$(CONFIG_DRM_PANEL_EBBG_FT8719) += panel-ebbg-ft8719.o
obj-$(CONFIG_DRM_PANEL_ELIDA_KD35T133) += panel-elida-kd35t133.o
+obj-$(CONFIG_DRM_PANEL_FANNAL_C3004) += panel-fannal-c3004.o
obj-$(CONFIG_DRM_PANEL_FEIXIN_K101_IM2BA02) += panel-feixin-k101-im2ba02.o
obj-$(CONFIG_DRM_PANEL_FEIYANG_FY07024DI26A30D) += panel-feiyang-fy07024di26a30d.o
obj-$(CONFIG_DRM_PANEL_HIMAX_HX8394) += panel-himax-hx8394.o
diff --git a/drivers/gpu/drm/panel/panel-fannal-c3004.c b/drivers/gpu/drm/panel/panel-fannal-c3004.c
new file mode 100644
index 000000000000..002c424f2486
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-fannal-c3004.c
@@ -0,0 +1,314 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MIPI DSI driver for fannal C3004.
+ * Copyright (C) 2023, Zenitel
+ * Author: Paulo Pavacic <pavacic.p@xxxxxxxxx>
+ */
+
+// ↓ include headers, static values, static functions ↓
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/media-bus-format.h>
+
+#include <video/mipi_display.h>
+#include <video/of_videomode.h>
+#include <video/videomode.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+
+struct fannal_panel_data {
+ struct drm_panel panel;
+ struct gpio_desc *reset;
+};
+
+static struct fannal_panel_data *
+get_fannal_panel_data_from_panel(struct drm_panel *panel)
+{
+ return container_of(panel, struct fannal_panel_data, panel);
+}
+
+static const u32 fannal_bus_formats[] = {
+ MEDIA_BUS_FMT_RGB888_1X24,
+};
+
+// resolution 480p x 800p, 56mmx93mm
+static const struct drm_display_mode fannal_c3004_display_mode = {
+ .clock = 27000,
+ .hdisplay = 480, // display height pixels
+ .hsync_start = 480 + 30, // hdisplay + HBP
+ .hsync_end = 480 + 30 + 8, // hdisplay + HBP + HSync
+ .htotal = 480 + 30 + 8 + 30, // hdisplay + HBP + HSync + HFP
+ .vdisplay = 800, // display width pixels
+ .vsync_start = 800 + 20, // vdisplay + VBP
+ .vsync_end = 800 + 20 + 8, // vdisplay + VBP + VSync
+ .vtotal = 800 + 20 + 8 + 20, // vdisplay + VBP + VSync + VFP
+ .width_mm = 93,
+ .height_mm = 56,
+ .flags = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+};
+
+static void fannal_panel_remove(struct mipi_dsi_device *dsi)
+{
+ struct fannal_panel_data *panel_data = mipi_dsi_get_drvdata(dsi);
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ ret = mipi_dsi_detach(dsi);
+ if (ret)
+ dev_err(dev, "error: disable: mipi detach (%d)\n", ret);
+
+ drm_panel_remove(&panel_data->panel);
+}
+
+static int fannal_panel_disable(struct drm_panel *panel)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(panel->dev);
+ struct device *dev = panel->dev;
+ int ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_off(dsi);
+ if (ret < 0) {
+ dev_err(dev, "error: disable: turn display OFF (%d)\n", ret);
+ return ret;
+ }
+
+ usleep_range(5000, 10000);
+
+ ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+ if (ret < 0) {
+ dev_err(dev, "error: disable: enter sleep mode (%d)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int fannal_panel_unprepare(struct drm_panel *panel)
+{
+ struct fannal_panel_data *panel_data =
+ get_fannal_panel_data_from_panel(panel);
+
+ if (panel_data->reset) {
+ gpiod_set_value_cansleep(panel_data->reset, 1);
+ usleep_range(15000, 17000);
+ gpiod_set_value_cansleep(panel_data->reset, 0);
+ }
+
+ return 0;
+}
+
+static void fannal_panel_shutdown(struct mipi_dsi_device *dsi)
+{
+ struct fannal_panel_data *panel_data = mipi_dsi_get_drvdata(dsi);
+
+ fannal_panel_disable(&panel_data->panel);
+ fannal_panel_unprepare(&panel_data->panel);
+}
+
+static int fannal_panel_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct drm_display_mode *mode;
+ const struct drm_display_mode *panel_display_mode =
+ &fannal_c3004_display_mode;
+
+ mode = drm_mode_duplicate(connector->dev, &fannal_c3004_display_mode);
+ if (!mode) {
+ dev_err(panel->dev, "error: get_modes: add drm mode %ux%u@%u\n",
+ panel_display_mode->hdisplay,
+ panel_display_mode->vdisplay,
+ drm_mode_vrefresh(panel_display_mode));
+ return -ENOMEM;
+ }
+
+ drm_mode_set_name(mode);
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ drm_mode_probed_add(connector, mode);
+
+ connector->display_info.width_mm = mode->width_mm;
+ connector->display_info.height_mm = mode->height_mm;
+ connector->display_info.bus_flags = DRM_BUS_FLAG_DE_LOW |
+ DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE;
+
+ drm_display_info_set_bus_formats(&connector->display_info,
+ fannal_bus_formats,
+ ARRAY_SIZE(fannal_bus_formats));
+ return 1;
+}
+
+static const struct of_device_id fannal_of_match[] = {
+ { .compatible = "fannal,c3004" },
+ { /* sentinel */ }
+};
+
+static int fannal_panel_enable(struct drm_panel *panel)
+{
+ struct mipi_dsi_device *dsi = to_mipi_dsi_device(panel->dev);
+
+ mipi_dsi_generic_write_seq(dsi, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x13);
+ mipi_dsi_generic_write_seq(dsi, 0xEF, 0x08);
+
+ mipi_dsi_generic_write_seq(dsi, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x10);
+ mipi_dsi_generic_write_seq(dsi, 0xC0, 0x63, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xC1, 0x0A, 0x0C);
+ mipi_dsi_generic_write_seq(dsi, 0xC2, 0x31, 0x08);
+ mipi_dsi_generic_write_seq(dsi, 0xCC, 0x18);
+
+ mipi_dsi_generic_write_seq(dsi, 0xB0, 0x00, 0x08, 0x10, 0x0E, 0x11,
+ 0x07, 0x08, 0x08, 0x08, 0x25, 0x04, 0x12,
+ 0x0F, 0x2C, 0x30, 0x1F);
+ mipi_dsi_generic_write_seq(dsi, 0xB1, 0x00, 0x11, 0x18, 0x0C, 0x10,
+ 0x05, 0x07, 0x09, 0x08, 0x24, 0x04, 0x11,
+ 0x10, 0x2B, 0x30, 0x1F);
+
+ mipi_dsi_generic_write_seq(dsi, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x11);
+ mipi_dsi_generic_write_seq(dsi, 0xB0, 0x4D);
+ mipi_dsi_generic_write_seq(dsi, 0xB1, 0x39);
+ mipi_dsi_generic_write_seq(dsi, 0xB2, 0x87);
+ mipi_dsi_generic_write_seq(dsi, 0xB3, 0x80);
+ mipi_dsi_generic_write_seq(dsi, 0xB5, 0x47);
+ mipi_dsi_generic_write_seq(dsi, 0xB7, 0x8A);
+ mipi_dsi_generic_write_seq(dsi, 0xB8, 0x20);
+ mipi_dsi_generic_write_seq(dsi, 0xB9, 0x10, 0x13);
+ mipi_dsi_generic_write_seq(dsi, 0xC1, 0x78);
+ mipi_dsi_generic_write_seq(dsi, 0xC2, 0x78);
+ mipi_dsi_generic_write_seq(dsi, 0xD0, 0x88);
+
+ //PANEL
+ mipi_dsi_generic_write_seq(dsi, 0xE0, 0x00, 0x00, 0x02);
+ mipi_dsi_generic_write_seq(dsi, 0xE1, 0x04, 0x00, 0x00, 0x00, 0x05,
+ 0x00, 0x00, 0x00, 0x00, 0x20, 0x20);
+ mipi_dsi_generic_write_seq(dsi, 0xE2, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xE3, 0x00, 0x00, 0x33, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xE4, 0x22, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xE5, 0x04, 0x34, 0xAA, 0xAA, 0x06,
+ 0x34, 0xAA, 0xAA, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xE6, 0x00, 0x00, 0x33, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xE7, 0x22, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xE8, 0x05, 0x34, 0xAA, 0xAA, 0x07,
+ 0x34, 0xAA, 0xAA, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xEB, 0x02, 0x00, 0x40, 0x40, 0x00,
+ 0x00, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xEC, 0x00, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0xED, 0xFA, 0x45, 0x0B, 0xFF, 0xFF,
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+ 0xFF, 0xB0, 0x54, 0xAF);
+ mipi_dsi_generic_write_seq(dsi, 0xEF, 0x10, 0x0D, 0x04, 0x08, 0x3F,
+ 0x1F);
+
+ mipi_dsi_generic_write_seq(dsi, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x13);
+ mipi_dsi_generic_write_seq(dsi, 0xE8, 0x00, 0x0E);
+
+ mipi_dsi_generic_write_seq(dsi, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0x11); //MIPI_DCS_EXIT_SLEEP_MODE
+
+ msleep(600);
+
+ mipi_dsi_generic_write_seq(dsi, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x13);
+ mipi_dsi_generic_write_seq(dsi, 0xE8, 0x00, 0x0C);
+ msleep(50);
+ mipi_dsi_generic_write_seq(dsi, 0xE8, 0x00, 0x00);
+
+ mipi_dsi_generic_write_seq(dsi, 0xFF, 0x77, 0x01, 0x00, 0x00, 0x00);
+ mipi_dsi_generic_write_seq(dsi, 0x29); //MIPI_DCS_SET_DISPLAY_ON
+ msleep(100);
+ return 0;
+}
+
+static int fannal_panel_prepare(struct drm_panel *panel)
+{
+ struct fannal_panel_data *panel_data =
+ get_fannal_panel_data_from_panel(panel);
+
+ /* At lest 10ms needed between power-on and reset-out as RM specifies */
+ usleep_range(10000, 12000);
+
+ if (panel_data->reset) {
+ gpiod_set_value_cansleep(panel_data->reset, 0);
+ /*
+ * 50ms delay after reset-out, as per manufacturer initalization
+ * sequence.
+ */
+ msleep(50);
+ }
+
+ return 0;
+}
+
+static const struct drm_panel_funcs fannal_panel_funcs = {
+ .prepare = fannal_panel_prepare,
+ .unprepare = fannal_panel_unprepare,
+ .enable = fannal_panel_enable,
+ .disable = fannal_panel_disable,
+ .get_modes = fannal_panel_get_modes,
+};
+
+static int fannal_panel_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct fannal_panel_data *panel_data;
+ int ret;
+
+ panel_data = devm_kzalloc(&dsi->dev, sizeof(*panel_data), GFP_KERNEL);
+ if (!panel_data)
+ return -ENOMEM;
+
+ panel_data->reset = devm_gpiod_get_optional(dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(panel_data->reset)) {
+ return dev_err_probe(
+ dev, PTR_ERR(panel_data->reset),
+ "error: probe: get reset GPIO: (%d) Check the fdt\n",
+ ret);
+ }
+
+ mipi_dsi_set_drvdata(dsi, panel_data);
+
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |
+ MIPI_DSI_MODE_VSYNC_FLUSH | MIPI_DSI_MODE_VIDEO_HSE |
+ MIPI_DSI_MODE_NO_EOT_PACKET |
+ MIPI_DSI_MODE_VIDEO_SYNC_PULSE | MIPI_DSI_MODE_VIDEO;
+ dsi->lanes = 2;
+
+ drm_panel_init(&panel_data->panel, dev, &fannal_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+ dev_set_drvdata(dev, panel_data);
+
+ drm_panel_add(&panel_data->panel);
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret) {
+ drm_panel_remove(&panel_data->panel);
+ dev_err(dev, "error: probe fail: can't attach mipi_dsi\n");
+ }
+
+ return ret;
+}
+
+static struct mipi_dsi_driver fannal_panel_driver = {
+ .driver = {
+ .name = "panel-fannal-c3004",
+ .of_match_table = fannal_of_match,
+ },
+ .probe = fannal_panel_probe,
+ .remove = fannal_panel_remove,
+ .shutdown = fannal_panel_shutdown,
+};
+
+module_mipi_dsi_driver(fannal_panel_driver);
+
+MODULE_AUTHOR("Paulo Pavacic <pavacic.p@xxxxxxxxx>");
+MODULE_DESCRIPTION("fannal C3004 panel driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(of, fannal_of_match);
--
2.40.1