[PATCH/RFC v3 11/19] video: panel: Add R61517 panel support
Laurent Pinchart
laurent.pinchart+renesas at ideasonboard.com
Fri Aug 9 10:15:02 PDT 2013
The R61517 is a MIPI DBI panel controller from Renesas.
Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
drivers/video/display/Kconfig | 10 +
drivers/video/display/Makefile | 1 +
drivers/video/display/panel-r61517.c | 460 +++++++++++++++++++++++++++++++++++
include/video/panel-r61517.h | 28 +++
4 files changed, 499 insertions(+)
create mode 100644 drivers/video/display/panel-r61517.c
create mode 100644 include/video/panel-r61517.h
diff --git a/drivers/video/display/Kconfig b/drivers/video/display/Kconfig
index 76729ef..9b44b5f 100644
--- a/drivers/video/display/Kconfig
+++ b/drivers/video/display/Kconfig
@@ -29,4 +29,14 @@ config DISPLAY_PANEL_R61505
If you are in doubt, say N. To compile this driver as a module, choose
M here; the module will be called panel-r61505.
+config DISPLAY_PANEL_R61517
+ tristate "Renesas R61517-based Display Panel"
+ select DISPLAY_MIPI_DBI
+ ---help---
+ Support panels based on the Renesas R61517 panel controller.
+ Those panels are controlled through a MIPI DBI interface.
+
+ If you are in doubt, say N. To compile this driver as a module, choose
+ M here; the module will be called panel-r61517.
+
endif # DISPLAY_CORE
diff --git a/drivers/video/display/Makefile b/drivers/video/display/Makefile
index db8a4c3..1cdc8d4 100644
--- a/drivers/video/display/Makefile
+++ b/drivers/video/display/Makefile
@@ -4,3 +4,4 @@ obj-$(CONFIG_DISPLAY_CORE) += display.o
obj-$(CONFIG_DISPLAY_MIPI_DBI) += mipi-dbi-bus.o
obj-$(CONFIG_DISPLAY_PANEL_DPI) += panel-dpi.o
obj-$(CONFIG_DISPLAY_PANEL_R61505) += panel-r61505.o
+obj-$(CONFIG_DISPLAY_PANEL_R61517) += panel-r61517.o
diff --git a/drivers/video/display/panel-r61517.c b/drivers/video/display/panel-r61517.c
new file mode 100644
index 0000000..ccfec33
--- /dev/null
+++ b/drivers/video/display/panel-r61517.c
@@ -0,0 +1,460 @@
+/*
+ * Renesas R61517-based Display Panels
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ * Based on KFR2R09 LCD panel support
+ * Copyright (C) 2009 Magnus Damm
+ * Register settings based on the out-of-tree t33fb.c driver
+ * Copyright (C) 2008 Lineo Solutions, Inc.
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/gpio.h>
+
+#include <video/display.h>
+#include <video/mipi-dbi-bus.h>
+#include <video/mipi_display.h>
+#include <video/panel-r61517.h>
+#include <video/videomode.h>
+
+struct r61517 {
+ struct display_entity entity;
+ struct mipi_dbi_device *dbi;
+ const struct panel_r61517_platform_data *pdata;
+};
+
+static inline struct r61517 *to_panel(struct display_entity *e)
+{
+ return container_of(e, struct r61517, entity);
+}
+
+/* -----------------------------------------------------------------------------
+ * Read, write and reset
+ */
+
+static void r61517_write_command(struct r61517 *panel, u16 cmd)
+{
+ mipi_dbi_write_command(panel->dbi, cmd);
+}
+
+static void r61517_write_data(struct r61517 *panel, u8 data)
+{
+ mipi_dbi_write_data(panel->dbi, &data, 1);
+}
+
+static int r61517_read_data(struct r61517 *panel)
+{
+ u8 data;
+ int ret;
+
+ ret = mipi_dbi_read_data(panel->dbi, &data, 1);
+ if (ret < 0)
+ return ret;
+
+ return data;
+}
+
+static void r61517_write(struct r61517 *panel, u8 reg, const u8 *data,
+ size_t len)
+{
+ mipi_dbi_write_command(panel->dbi, reg);
+ mipi_dbi_write_data(panel->dbi, data, len);
+}
+
+static void r61517_write8(struct r61517 *panel, u8 reg, u8 data)
+{
+ r61517_write(panel, reg, &data, 1);
+}
+
+static void r61517_write16(struct r61517 *panel, u8 reg, u16 data)
+{
+ u8 buffer[2] = { (data >> 8) & 0xff, (data >> 0) & 0xff };
+
+ r61517_write(panel, reg, buffer, 2);
+}
+
+static void r61517_write32(struct r61517 *panel, u8 reg, u32 data)
+{
+ u8 buffer[4] = { (data >> 24) & 0xff, (data >> 16) & 0xff,
+ (data >> 8) & 0xff, (data >> 0) & 0xff };
+
+ r61517_write(panel, reg, buffer, 4);
+}
+
+#define r61517_write_array(p, c, a) \
+ r61517_write((p), (c), (a), ARRAY_SIZE(a))
+
+static void r61517_reset(struct r61517 *panel)
+{
+ gpio_set_value(panel->pdata->protect, 0); /* PROTECT/ -> L */
+ gpio_set_value(panel->pdata->reset, 0); /* LCD_RST/ -> L */
+ gpio_set_value(panel->pdata->protect, 1); /* PROTECT/ -> H */
+ usleep_range(1100, 1200);
+ gpio_set_value(panel->pdata->reset, 1); /* LCD_RST/ -> H */
+ usleep_range(10, 100);
+ gpio_set_value(panel->pdata->protect, 0); /* PROTECT/ -> L */
+ msleep(20);
+}
+
+/* -----------------------------------------------------------------------------
+ * Configuration
+ */
+
+static const u8 data_frame_if[] = {
+ 0x02, /* WEMODE: 1=cont, 0=one-shot */
+ 0x00, 0x00,
+ 0x00, /* EPF, DFM */
+ 0x02, /* RIM[1] : 1 (18bpp) */
+};
+
+static const u8 data_panel[] = {
+ 0x0b,
+ 0x63, /* 400 lines */
+ 0x04, 0x00, 0x00, 0x04, 0x11, 0x00, 0x00,
+};
+
+static const u8 data_timing[] = {
+ 0x00, 0x00, 0x13, 0x08, 0x08,
+};
+
+static const u8 data_timing_src[] = {
+ 0x11, 0x01, 0x00, 0x01,
+};
+
+static const u8 data_gamma[] = {
+ 0x01, 0x02, 0x08, 0x23, 0x03, 0x0c, 0x00, 0x06, 0x00, 0x00,
+ 0x01, 0x00, 0x0c, 0x23, 0x03, 0x08, 0x02, 0x06, 0x00, 0x00,
+};
+
+static const u8 data_power[] = {
+ 0x07, 0xc5, 0xdc, 0x02, 0x33, 0x0a,
+};
+
+static const u8 data_vcom[] = {
+ 0x00, 0x0f, 0x02,
+};
+
+static unsigned long r61517_read_device_code(struct r61517 *panel)
+{
+ /* access protect OFF */
+ r61517_write8(panel, 0xb0, 0);
+
+ /* deep standby OFF */
+ r61517_write8(panel, 0xb1, 0);
+
+ /* device code command */
+ r61517_write_command(panel, 0xbf);
+ mdelay(50);
+
+ /* dummy read */
+ r61517_read_data(panel);
+
+ /* read device code */
+ return (r61517_read_data(panel) << 24) |
+ (r61517_read_data(panel) << 16) |
+ (r61517_read_data(panel) << 8) |
+ (r61517_read_data(panel) << 0);
+}
+
+static void r61517_write_memory_start(struct r61517 *panel)
+{
+ r61517_write_command(panel, MIPI_DCS_WRITE_MEMORY_START);
+}
+
+static void r61517_clear_memory(struct r61517 *panel)
+{
+ unsigned int size = panel->pdata->mode->hactive
+ * panel->pdata->mode->vactive;
+ unsigned int i;
+
+ r61517_write_memory_start(panel);
+
+ for (i = 0; i < size; i++)
+ r61517_write_data(panel, 0);
+}
+
+static void r61517_enable_panel(struct r61517 *panel)
+{
+ /* access protect off */
+ r61517_write8(panel, 0xb0, 0);
+
+ /* exit deep standby mode */
+ r61517_write8(panel, 0xb1, 0);
+
+ /* frame memory I/F */
+ r61517_write_array(panel, 0xb3, data_frame_if);
+
+ /* display mode and frame memory write mode */
+ r61517_write8(panel, 0xb4, 0); /* DBI, internal clock */
+
+ /* panel */
+ r61517_write_array(panel, 0xc0, data_panel);
+
+ /* timing (normal) */
+ r61517_write_array(panel, 0xc1, data_timing);
+
+ /* timing (partial) */
+ r61517_write_array(panel, 0xc2, data_timing);
+
+ /* timing (idle) */
+ r61517_write_array(panel, 0xc3, data_timing);
+
+ /* timing (source/VCOM/gate driving) */
+ r61517_write_array(panel, 0xc4, data_timing_src);
+
+ /* gamma (red) */
+ r61517_write_array(panel, 0xc8, data_gamma);
+
+ /* gamma (green) */
+ r61517_write_array(panel, 0xc9, data_gamma);
+
+ /* gamma (blue) */
+ r61517_write_array(panel, 0xca, data_gamma);
+
+ /* power (common) */
+ r61517_write_array(panel, 0xd0, data_power);
+
+ /* VCOM */
+ r61517_write_array(panel, 0xd1, data_vcom);
+
+ /* power (normal) */
+ r61517_write16(panel, 0xd2, 0x6324);
+
+ /* power (partial) */
+ r61517_write16(panel, 0xd3, 0x6324);
+
+ /* power (idle) */
+ r61517_write16(panel, 0xd4, 0x6324);
+
+ r61517_write16(panel, 0xd8, 0x7777);
+
+ /* TE signal */
+ r61517_write8(panel, MIPI_DCS_SET_TEAR_ON, 0);
+
+ /* TE signal line */
+ r61517_write16(panel, MIPI_DCS_SET_TEAR_SCANLINE, 0);
+
+ /* column address */
+ r61517_write32(panel, MIPI_DCS_SET_COLUMN_ADDRESS,
+ panel->pdata->mode->hactive - 1);
+
+ /* page address */
+ r61517_write32(panel, MIPI_DCS_SET_PAGE_ADDRESS,
+ panel->pdata->mode->vactive - 1);
+
+ /* exit sleep mode */
+ r61517_write_command(panel, MIPI_DCS_EXIT_SLEEP_MODE);
+
+ mdelay(120);
+
+ /* clear vram */
+ r61517_clear_memory(panel);
+}
+
+static void r61517_disable_panel(struct r61517 *panel)
+{
+ r61517_reset(panel);
+}
+
+static void r61517_display_on(struct r61517 *panel)
+{
+ r61517_write_command(panel, MIPI_DCS_SET_DISPLAY_ON);
+ mdelay(1);
+}
+
+static void r61517_display_off(struct r61517 *panel)
+{
+ r61517_write_command(panel, MIPI_DCS_SET_DISPLAY_OFF);
+}
+
+/* -----------------------------------------------------------------------------
+ * Panel operations
+ */
+
+static const struct display_entity_interface_params r61517_dbi_params = {
+ .type = DISPLAY_ENTITY_INTERFACE_DBI,
+ .p.dbi = {
+ .type = MIPI_DBI_INTERFACE_TYPE_B,
+ .flags = MIPI_DBI_INTERFACE_TE,
+ .cs_setup = 1,
+ .wr_setup = 1,
+ .wr_cycle = 9,
+ .wr_hold = 4,
+ .rd_setup = 1,
+ .rd_latch = 20,
+ .rd_cycle = 41,
+ .rd_hold = 20,
+ },
+};
+
+static int r61517_set_state(struct display_entity *entity,
+ enum display_entity_state state)
+{
+ struct r61517 *panel = to_panel(entity);
+
+ switch (state) {
+ case DISPLAY_ENTITY_STATE_OFF:
+ r61517_disable_panel(panel);
+ break;
+
+ case DISPLAY_ENTITY_STATE_STANDBY:
+ if (entity->state == DISPLAY_ENTITY_STATE_OFF)
+ r61517_enable_panel(panel);
+ else
+ r61517_display_off(panel);
+ break;
+
+ case DISPLAY_ENTITY_STATE_ON:
+ if (entity->state == DISPLAY_ENTITY_STATE_OFF)
+ r61517_enable_panel(panel);
+
+ r61517_display_on(panel);
+ break;
+ }
+
+ return 0;
+}
+
+static int r61517_update(struct display_entity *entity)
+{
+ struct r61517 *panel = to_panel(entity);
+ struct media_pad *source;
+
+ r61517_write_memory_start(panel);
+
+ source = media_entity_remote_pad(&entity->entity.pads[0]);
+ if (source == NULL)
+ return -EPIPE;
+
+ display_entity_set_stream(to_display_entity(source->entity),
+ source->index,
+ DISPLAY_ENTITY_STREAM_SINGLE_SHOT);
+ return 0;
+}
+
+static int r61517_get_modes(struct display_entity *entity, unsigned int port,
+ const struct videomode **modes)
+{
+ struct r61517 *panel = to_panel(entity);
+
+ *modes = panel->pdata->mode;
+ return 1;
+}
+
+static int r61517_get_size(struct display_entity *entity,
+ unsigned int *width, unsigned int *height)
+{
+ struct r61517 *panel = to_panel(entity);
+
+ *width = panel->pdata->width;
+ *height = panel->pdata->height;
+ return 0;
+}
+
+static int r61517_get_params(struct display_entity *entity, unsigned int port,
+ struct display_entity_interface_params *params)
+{
+ *params = r61517_dbi_params;
+ return 0;
+}
+
+static const struct display_entity_control_ops r61517_control_ops = {
+ .set_state = r61517_set_state,
+ .update = r61517_update,
+ .get_modes = r61517_get_modes,
+ .get_size = r61517_get_size,
+ .get_params = r61517_get_params,
+};
+
+static const struct display_entity_ops r61517_ops = {
+ .ctrl = &r61517_control_ops,
+};
+
+static int r61517_remove(struct mipi_dbi_device *dev)
+{
+ struct r61517 *panel = mipi_dbi_get_drvdata(dev);
+
+ display_entity_remove(&panel->entity);
+ display_entity_cleanup(&panel->entity);
+
+ return 0;
+}
+
+static int r61517_probe(struct mipi_dbi_device *dev)
+{
+ const struct panel_r61517_platform_data *pdata = dev->dev.platform_data;
+ struct r61517 *panel;
+ int ret;
+
+ if (pdata == NULL)
+ return -ENODEV;
+
+ panel = devm_kzalloc(&dev->dev, sizeof(*panel), GFP_KERNEL);
+ if (panel == NULL)
+ return -ENOMEM;
+
+ panel->pdata = pdata;
+ panel->dbi = dev;
+
+ dev->bus_width = pdata->bus_width;
+ mipi_dbi_set_data_width(dev, 8);
+
+ r61517_reset(panel);
+
+ if (r61517_read_device_code(panel) != 0x01221517)
+ return -ENODEV;
+
+ pr_info("R61517 panel controller detected.\n");
+
+ panel->entity.dev = &dev->dev;
+ panel->entity.ops = &r61517_ops;
+
+ ret = display_entity_init(&panel->entity, 1, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = display_entity_add(&panel->entity);
+ if (ret < 0)
+ return ret;
+
+ mipi_dbi_set_drvdata(dev, panel);
+
+ return 0;
+}
+
+static const struct dev_pm_ops r61517_dev_pm_ops = {
+};
+
+static struct mipi_dbi_device_id r61517_id_table[] = {
+ { "panel-r61517", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(mipi_dbi, r61517_id_table);
+
+static struct mipi_dbi_driver r61517_driver = {
+ .probe = r61517_probe,
+ .remove = r61517_remove,
+ .id_table = r61517_id_table,
+ .driver = {
+ .name = "panel-r61517",
+ .owner = THIS_MODULE,
+ .pm = &r61517_dev_pm_ops,
+ },
+};
+
+module_mipi_dbi_driver(r61517_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart at ideasonboard.com>");
+MODULE_DESCRIPTION("Renesas R61517-based Display Panel");
+MODULE_LICENSE("GPL");
diff --git a/include/video/panel-r61517.h b/include/video/panel-r61517.h
new file mode 100644
index 0000000..33f16af
--- /dev/null
+++ b/include/video/panel-r61517.h
@@ -0,0 +1,28 @@
+/*
+ * Renesas R61517-based Display Panels
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __PANEL_R61517_H__
+#define __PANEL_R61517_H__
+
+struct videomode;
+
+struct panel_r61517_platform_data {
+ unsigned long width; /* Panel width in mm */
+ unsigned long height; /* Panel height in mm */
+ const struct videomode *mode;
+
+ unsigned int bus_width;
+ int protect; /* Protect GPIO */
+ int reset; /* Reset GPIO */
+};
+
+#endif /* __PANEL_R61517_H__ */
--
1.8.1.5
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