[RFC 5/5] video: panel: Add R61517 panel support

The R61517 is a MIPI DBI panel controller from Renesas.

Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com --- drivers/video/panel/Kconfig | 9 + drivers/video/panel/Makefile | 1 + drivers/video/panel/panel-r61517.c | 408 ++++++++++++++++++++++++++++++++++++ include/video/panel-r61517.h | 28 +++ 4 files changed, 446 insertions(+), 0 deletions(-) create mode 100644 drivers/video/panel/panel-r61517.c create mode 100644 include/video/panel-r61517.h

diff --git a/drivers/video/panel/Kconfig b/drivers/video/panel/Kconfig index 12d7712..bd643be 100644 --- a/drivers/video/panel/Kconfig +++ b/drivers/video/panel/Kconfig @@ -25,4 +25,13 @@ config DISPLAY_PANEL_R61505

If you are in doubt, say N.

+config DISPLAY_PANEL_R61517 + tristate "Renesas R61517-based Display Panel" + select DISPLAY_PANEL_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. + endif # DISPLAY_PANEL diff --git a/drivers/video/panel/Makefile b/drivers/video/panel/Makefile index e4fb9fe..3c11d26 100644 --- a/drivers/video/panel/Makefile +++ b/drivers/video/panel/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_DISPLAY_PANEL) += panel.o obj-$(CONFIG_DISPLAY_PANEL_DUMMY) += panel-dummy.o obj-$(CONFIG_DISPLAY_PANEL_DBI) += panel-dbi.o obj-$(CONFIG_DISPLAY_PANEL_R61505) += panel-r61505.o +obj-$(CONFIG_DISPLAY_PANEL_R61517) += panel-r61517.o diff --git a/drivers/video/panel/panel-r61517.c b/drivers/video/panel/panel-r61517.c new file mode 100644 index 0000000..6e8d933 --- /dev/null +++ b/drivers/video/panel/panel-r61517.c @@ -0,0 +1,408 @@ +/* + * 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@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/panel-dbi.h> +#include <video/panel-r61517.h> + +struct r61517 { + struct panel panel; + struct panel_dbi_device *dbi; + const struct panel_r61517_platform_data *pdata; +}; + +#define to_panel(p) container_of(p, struct r61517, panel) + +/* ----------------------------------------------------------------------------- + * Read, write and reset + */ + +static void r61517_write_command(struct r61517 *panel, u16 reg) +{ + panel_dbi_write_command(panel->dbi, reg); +} + +static void r61517_write_data(struct r61517 *panel, u16 data) +{ + panel_dbi_write_data(panel->dbi, data); +} + +static void r61517_write(struct r61517 *panel, u16 reg, u16 data) +{ + panel_dbi_write_command(panel->dbi, reg); + panel_dbi_write_data(panel->dbi, data); +} + +static u16 r61517_read_data(struct r61517 *panel) +{ + return panel_dbi_read_data(panel->dbi); +} + +static void __r61517_write_array(struct r61517 *panel, const u8 *data, + unsigned int len) +{ + unsigned int i; + + for (i = 0; i < len; ++i) + r61517_write_data(panel, data[i]); +} + +#define r61517_write_array(p, a) \ + __r61517_write_array(p, 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 unsigned long r61517_read_device_code(struct r61517 *panel) +{ + /* access protect OFF */ + r61517_write(panel, 0xb0, 0x00); + + /* deep standby OFF */ + r61517_write(panel, 0xb1, 0x00); + + /* device code command */ + r61517_write_command(panel, 0xbf); + mdelay(50); + + /* dummy read */ + r61517_read_data(panel); + + /* read device code */ + return ((r61517_read_data(panel) & 0xff) << 24) | + ((r61517_read_data(panel) & 0xff) << 16) | + ((r61517_read_data(panel) & 0xff) << 8) | + ((r61517_read_data(panel) & 0xff) << 0); +} + +static void r61517_write_memory_start(struct r61517 *panel) +{ + r61517_write_command(panel, 0x2c); +} + +static void r61517_clear_memory(struct r61517 *panel) +{ + unsigned int i; + + r61517_write_memory_start(panel); + + for (i = 0; i < (240 * 400); i++) + r61517_write_data(panel, 0); +} + +static void r61517_enable_panel(struct r61517 *panel) +{ + /* access protect off */ + r61517_write(panel, 0xb0, 0x00); + + /* exit deep standby mode */ + r61517_write(panel, 0xb1, 0x00); + + /* frame memory I/F */ + r61517_write_command(panel, 0xb3); + r61517_write_array(panel, data_frame_if); + + /* display mode and frame memory write mode */ + r61517_write(panel, 0xb4, 0x00); /* DBI, internal clock */ + + /* panel */ + r61517_write_command(panel, 0xc0); + r61517_write_array(panel, data_panel); + + /* timing (normal) */ + r61517_write_command(panel, 0xc1); + r61517_write_array(panel, data_timing); + + /* timing (partial) */ + r61517_write_command(panel, 0xc2); + r61517_write_array(panel, data_timing); + + /* timing (idle) */ + r61517_write_command(panel, 0xc3); + r61517_write_array(panel, data_timing); + + /* timing (source/VCOM/gate driving) */ + r61517_write_command(panel, 0xc4); + r61517_write_array(panel, data_timing_src); + + /* gamma (red) */ + r61517_write_command(panel, 0xc8); + r61517_write_array(panel, data_gamma); + + /* gamma (green) */ + r61517_write_command(panel, 0xc9); + r61517_write_array(panel, data_gamma); + + /* gamma (blue) */ + r61517_write_command(panel, 0xca); + r61517_write_array(panel, data_gamma); + + /* power (common) */ + r61517_write_command(panel, 0xd0); + r61517_write_array(panel, data_power); + + /* VCOM */ + r61517_write_command(panel, 0xd1); + r61517_write_data(panel, 0x00); + r61517_write_data(panel, 0x0f); + r61517_write_data(panel, 0x02); + + /* power (normal) */ + r61517_write_command(panel, 0xd2); + r61517_write_data(panel, 0x63); + r61517_write_data(panel, 0x24); + + /* power (partial) */ + r61517_write_command(panel, 0xd3); + r61517_write_data(panel, 0x63); + r61517_write_data(panel, 0x24); + + /* power (idle) */ + r61517_write_command(panel, 0xd4); + r61517_write_data(panel, 0x63); + r61517_write_data(panel, 0x24); + + r61517_write_command(panel, 0xd8); + r61517_write_data(panel, 0x77); + r61517_write_data(panel, 0x77); + + /* TE signal */ + r61517_write(panel, 0x35, 0x00); + + /* TE signal line */ + r61517_write_command(panel, 0x44); + r61517_write_data(panel, 0x00); + r61517_write_data(panel, 0x00); + + /* column address */ + r61517_write_command(panel, 0x2a); + r61517_write_data(panel, 0x00); + r61517_write_data(panel, 0x00); + r61517_write_data(panel, 0x00); + r61517_write_data(panel, 0xef); + + /* page address */ + r61517_write_command(panel, 0x2b); + r61517_write_data(panel, 0x00); + r61517_write_data(panel, 0x00); + r61517_write_data(panel, 0x01); + r61517_write_data(panel, 0x8f); + + /* exit sleep mode */ + r61517_write_command(panel, 0x11); + + 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, 0x29); + mdelay(1); +} + +static void r61517_display_off(struct r61517 *panel) +{ + r61517_write_command(panel, 0x28); +} + +/* ----------------------------------------------------------------------------- + * Panel operations + */ + +static int r61517_enable(struct panel *p, enum panel_enable_mode enable) +{ + struct r61517 *panel = to_panel(p); + + switch (enable) { + case PANEL_ENABLE_OFF: + r61517_disable_panel(panel); + break; + + case PANEL_ENABLE_BLANK: + if (p->enable == PANEL_ENABLE_OFF) + r61517_enable_panel(panel); + else + r61517_display_off(panel); + break; + + case PANEL_ENABLE_ON: + if (p->enable == PANEL_ENABLE_OFF) + r61517_enable_panel(panel); + + r61517_display_on(panel); + break; + } + + return 0; +} + +static int r61517_start_transfer(struct panel *p) +{ + struct r61517 *panel = to_panel(p); + + r61517_write_memory_start(panel); + return 0; +} + +static int r61517_get_modes(struct panel *p, const struct fb_videomode **modes) +{ + struct r61517 *panel = to_panel(p); + + *modes = panel->pdata->mode; + return 1; +} + +static const struct panel_ops r61517_ops = { + .enable = r61517_enable, + .start_transfer = r61517_start_transfer, + .get_modes = r61517_get_modes, +}; + +static void r61517_release(struct panel *p) +{ + struct r61517 *panel = to_panel(p); + + kfree(panel); +} + +static int r61517_remove(struct panel_dbi_device *dev) +{ + struct r61517 *panel = panel_dbi_get_drvdata(dev); + + panel_dbi_set_drvdata(dev, NULL); + panel_unregister(&panel->panel); + + return 0; +} + +static int __devinit r61517_probe(struct panel_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 = kzalloc(sizeof(*panel), GFP_KERNEL); + if (panel == NULL) + return -ENOMEM; + + panel->pdata = pdata; + panel->dbi = dev; + + r61517_reset(panel); + + if (r61517_read_device_code(panel) != 0x01221517) { + kfree(panel); + return -ENODEV; + } + + pr_info("R61517 panel controller detected.\n"); + + panel->panel.dev = &dev->dev; + panel->panel.release = r61517_release; + panel->panel.ops = &r61517_ops; + panel->panel.width = pdata->width; + panel->panel.height = pdata->height; + + ret = panel_register(&panel->panel); + if (ret < 0) { + kfree(panel); + return ret; + } + + panel_dbi_set_drvdata(dev, panel); + + return 0; +} + +static const struct dev_pm_ops r61517_dev_pm_ops = { +}; + +static struct panel_dbi_driver r61517_driver = { + .probe = r61517_probe, + .remove = r61517_remove, + .driver = { + .name = "panel_r61517", + .owner = THIS_MODULE, + .pm = &r61517_dev_pm_ops, + }, +}; + +module_panel_dbi_driver(r61517_driver); + +MODULE_AUTHOR("Laurent Pinchart laurent.pinchart@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..c9e6ddf --- /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@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__ + +#include <linux/fb.h> +#include <video/panel.h> + +struct panel_r61517_platform_data { + unsigned long width; /* Panel width in mm */ + unsigned long height; /* Panel height in mm */ + const struct fb_videomode *mode; + + int protect; /* Protect GPIO */ + int reset; /* Reset GPIO */ +}; + +#endif /* __PANEL_R61517_H__ */