From 66e16f86d3f4c5b34b37e965c65102b7192371de Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Thu, 2 Apr 2009 11:47:13 +0300 Subject: [PATCH] DSS2: Add acx565akm panel Signed-off-by: Imre Deak --- drivers/video/omap2/displays/Kconfig | 8 + drivers/video/omap2/displays/Makefile | 2 + drivers/video/omap2/displays/panel-acx565akm.c | 712 ++++++++++++++++++++++++ drivers/video/omap2/displays/panel-acx565akm.h | 9 + 4 files changed, 731 insertions(+), 0 deletions(-) create mode 100644 drivers/video/omap2/displays/panel-acx565akm.c create mode 100644 drivers/video/omap2/displays/panel-acx565akm.h diff --git a/drivers/video/omap2/displays/Kconfig b/drivers/video/omap2/displays/Kconfig index 356ceb1..3feecee 100644 --- a/drivers/video/omap2/displays/Kconfig +++ b/drivers/video/omap2/displays/Kconfig @@ -28,4 +28,12 @@ config CTRL_BLIZZARD tristate "Blizzard Controller" help Blizzard Controller (hack) + +config PANEL_ACX565AKM + tristate "ACX565AKM LCD Panel" + depends on OMAP2_DSS_SDI + select BACKLIGHT_CLASS_DEVICE + help + LCD Panel used in RX51 + endmenu diff --git a/drivers/video/omap2/displays/Makefile b/drivers/video/omap2/displays/Makefile index 1b74b7e..9bafcb6 100644 --- a/drivers/video/omap2/displays/Makefile +++ b/drivers/video/omap2/displays/Makefile @@ -4,3 +4,5 @@ obj-$(CONFIG_PANEL_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.o obj-$(CONFIG_CTRL_BLIZZARD) += ctrl-blizzard.o obj-$(CONFIG_PANEL_N800) += panel-n800.o + +obj-$(CONFIG_PANEL_ACX565AKM) += panel-acx565akm.o diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c new file mode 100644 index 0000000..2679d6c --- /dev/null +++ b/drivers/video/omap2/displays/panel-acx565akm.c @@ -0,0 +1,712 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "panel-acx565akm.h" + +#define MIPID_CMD_READ_DISP_ID 0x04 +#define MIPID_CMD_READ_RED 0x06 +#define MIPID_CMD_READ_GREEN 0x07 +#define MIPID_CMD_READ_BLUE 0x08 +#define MIPID_CMD_READ_DISP_STATUS 0x09 +#define MIPID_CMD_RDDSDR 0x0F +#define MIPID_CMD_SLEEP_IN 0x10 +#define MIPID_CMD_SLEEP_OUT 0x11 +#define MIPID_CMD_DISP_OFF 0x28 +#define MIPID_CMD_DISP_ON 0x29 +#define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51 +#define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52 +#define MIPID_CMD_WRITE_CTRL_DISP 0x53 + +#define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5) +#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4) +#define CTRL_DISP_BACKLIGHT_ON (1 << 2) +#define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1) + +#define MIPID_CMD_READ_CTRL_DISP 0x54 +#define MIPID_CMD_WRITE_CABC 0x55 +#define MIPID_CMD_READ_CABC 0x56 + +#define MIPID_VER_LPH8923 3 +#define MIPID_VER_LS041Y3 4 +#define MIPID_VER_L4F00311 8 +#define MIPID_VER_ACX565AKM 9 + +struct acx565akm_device { + struct backlight_device *bl_dev; + int enabled; + int model; + int revision; + u8 display_id[3]; + int has_bc:1; + int has_cabc:1; + unsigned int saved_bklight_level; + unsigned long hw_guard_end; /* next value of jiffies + when we can issue the + next sleep in/out command */ + unsigned long hw_guard_wait; /* max guard time in jiffies */ + + struct spi_device *spi; + struct mutex mutex; + struct omap_panel panel; + struct omap_display *display; +}; + +static int acx565akm_bl_update_status(struct backlight_device *dev); + +static void acx565akm_transfer(struct acx565akm_device *md, int cmd, + const u8 *wbuf, int wlen, u8 *rbuf, int rlen) +{ + struct spi_message m; + struct spi_transfer *x, xfer[5]; + int r; + + BUG_ON(md->spi == NULL); + + spi_message_init(&m); + + memset(xfer, 0, sizeof(xfer)); + x = &xfer[0]; + + cmd &= 0xff; + x->tx_buf = &cmd; + x->bits_per_word = 9; + x->len = 2; + + if (rlen > 1 && wlen == 0) { + /* + * Between the command and the response data there is a + * dummy clock cycle. Add an extra bit after the command + * word to account for this. + */ + x->bits_per_word = 10; + cmd <<= 1; + } + spi_message_add_tail(x, &m); + + if (wlen) { + x++; + x->tx_buf = wbuf; + x->len = wlen; + x->bits_per_word = 9; + spi_message_add_tail(x, &m); + } + + if (rlen) { + x++; + x->rx_buf = rbuf; + x->len = rlen; + spi_message_add_tail(x, &m); + } + + r = spi_sync(md->spi, &m); + if (r < 0) + dev_dbg(&md->spi->dev, "spi_sync %d\n", r); +} + +static inline void acx565akm_cmd(struct acx565akm_device *md, int cmd) +{ + acx565akm_transfer(md, cmd, NULL, 0, NULL, 0); +} + +static inline void acx565akm_write(struct acx565akm_device *md, + int reg, const u8 *buf, int len) +{ + acx565akm_transfer(md, reg, buf, len, NULL, 0); +} + +static inline void acx565akm_read(struct acx565akm_device *md, + int reg, u8 *buf, int len) +{ + acx565akm_transfer(md, reg, NULL, 0, buf, len); +} + +static void hw_guard_start(struct acx565akm_device *md, int guard_msec) +{ + md->hw_guard_wait = msecs_to_jiffies(guard_msec); + md->hw_guard_end = jiffies + md->hw_guard_wait; +} + +static void hw_guard_wait(struct acx565akm_device *md) +{ + unsigned long wait = md->hw_guard_end - jiffies; + + if ((long)wait > 0 && wait <= md->hw_guard_wait) { + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(wait); + } +} + +static void set_sleep_mode(struct acx565akm_device *md, int on) +{ + int cmd, sleep_time = 50; + + if (on) + cmd = MIPID_CMD_SLEEP_IN; + else + cmd = MIPID_CMD_SLEEP_OUT; + hw_guard_wait(md); + acx565akm_cmd(md, cmd); + hw_guard_start(md, 120); + /* + * When we enable the panel, it seems we _have_ to sleep + * 120 ms before sending the init string. When disabling the + * panel we'll sleep for the duration of 2 frames, so that the + * controller can still provide the PCLK,HS,VS signals. */ + if (!on) + sleep_time = 120; + msleep(sleep_time); +} + +static void set_display_state(struct acx565akm_device *md, int enabled) +{ + int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF; + + acx565akm_cmd(md, cmd); +} + +static int panel_enabled(struct acx565akm_device *md) +{ + u32 disp_status; + int enabled; + + acx565akm_read(md, MIPID_CMD_READ_DISP_STATUS, (u8 *)&disp_status, 4); + disp_status = __be32_to_cpu(disp_status); + enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10)); + dev_dbg(&md->spi->dev, + "LCD panel %senabled by bootloader (status 0x%04x)\n", + enabled ? "" : "not ", disp_status); + return enabled; +} + +static void enable_backlight_ctrl(struct acx565akm_device *md, int enable) +{ + u16 ctrl; + + acx565akm_read(md, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1); + if (enable) { + ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON | + CTRL_DISP_BACKLIGHT_ON; + } else { + ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON | + CTRL_DISP_BACKLIGHT_ON); + } + + ctrl |= 1 << 8; + acx565akm_write(md, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2); +} + +static void set_cabc_mode(struct acx565akm_device *md, int mode) +{ + u16 cabc_ctrl; + + cabc_ctrl = 0; + acx565akm_read(md, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1); + cabc_ctrl &= ~3; + cabc_ctrl |= (1 << 8) | (mode & 3); + acx565akm_write(md, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2); +} + +static int get_cabc_mode(struct acx565akm_device *md) +{ + u8 cabc_ctrl; + + acx565akm_read(md, MIPID_CMD_READ_CABC, &cabc_ctrl, 1); + return cabc_ctrl & 3; +} + +static int panel_detect(struct acx565akm_device *md) +{ + acx565akm_read(md, MIPID_CMD_READ_DISP_ID, md->display_id, 3); + dev_dbg(&md->spi->dev, "MIPI display ID: %02x%02x%02x\n", + md->display_id[0], md->display_id[1], md->display_id[2]); + + switch (md->display_id[0]) { + case 0x10: + md->model = MIPID_VER_ACX565AKM; + md->panel.name = "acx565akm"; + md->has_bc = 1; + md->has_cabc = 1; + break; + case 0x29: + md->model = MIPID_VER_L4F00311; + md->panel.name = "l4f00311"; + break; + case 0x45: + md->model = MIPID_VER_LPH8923; + md->panel.name = "lph8923"; + break; + case 0x83: + md->model = MIPID_VER_LS041Y3; + md->panel.name = "ls041y3"; + break; + default: + md->panel.name = "unknown"; + dev_err(&md->spi->dev, "invalid display ID\n"); + return -ENODEV; + } + + md->revision = md->display_id[1]; + + pr_info("omapfb: %s rev %02x LCD detected\n", + md->panel.name, md->revision); + + return 0; +} + +static int acx565akm_panel_enable(struct omap_display *display) +{ + struct acx565akm_device *md = + (struct acx565akm_device *)display->panel->priv; + + dev_dbg(&md->spi->dev, "%s\n", __func__); + + mutex_lock(&md->mutex); + + if (display->hw_config.panel_enable) + display->hw_config.panel_enable(display); + + md->enabled = panel_enabled(md); + + if (md->enabled) { + dev_dbg(&md->spi->dev, "panel already enabled\n"); + mutex_unlock(&md->mutex); + return 0; + } + + set_sleep_mode(md, 0); + md->enabled = 1; + set_display_state(md, 1); + + mutex_unlock(&md->mutex); + + return acx565akm_bl_update_status(md->bl_dev); +} + +static void acx565akm_panel_disable(struct omap_display *display) +{ + struct acx565akm_device *md = + (struct acx565akm_device *)display->panel->priv; + + dev_dbg(&md->spi->dev, "%s\n", __func__); + + mutex_lock(&md->mutex); + + if (!md->enabled) { + mutex_unlock(&md->mutex); + return; + } + set_display_state(md, 0); + set_sleep_mode(md, 1); + md->enabled = 0; + + if (display->hw_config.panel_disable) + display->hw_config.panel_disable(display); + + mutex_unlock(&md->mutex); +} + +#if 0 +static void acx565akm_set_mode(struct omap_display *display, + int x_res, int y_res, int bpp) +{ + struct acx565akm_device *md = + (struct acx565akm_device *)display->panel->priv; + u16 par; + + switch (bpp) { + case 16: + par = 0x150; + break; + case 18: + par = 0x160; + break; + case 24: + par = 0x170; + break; + } + + acx565akm_write(md, 0x3a, (u8 *)&par, 2); +} +#endif + +static int acx565akm_panel_suspend(struct omap_display *display) +{ + acx565akm_panel_disable(display); + return 0; +} + +static int acx565akm_panel_resume(struct omap_display *display) +{ + return acx565akm_panel_enable(display); +} + +static void acx565akm_set_brightness(struct acx565akm_device *md, int level) +{ + int bv; + + bv = level | (1 << 8); + acx565akm_write(md, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2); + + if (level) + enable_backlight_ctrl(md, 1); + else + enable_backlight_ctrl(md, 0); +} + +static int acx565akm_get_actual_brightness(struct acx565akm_device *md) +{ + u8 bv; + + acx565akm_read(md, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1); + + return bv; +} + +static int acx565akm_bl_update_status(struct backlight_device *dev) +{ + struct acx565akm_device *md = dev_get_drvdata(&dev->dev); + struct omap_display *display = md->display; + int r; + int level; + + dev_dbg(&md->spi->dev, "%s\n", __func__); + + if (display->hw_config.set_backlight == NULL) + return -ENODEV; + + mutex_lock(&md->mutex); + + if (dev->props.fb_blank == FB_BLANK_UNBLANK && + dev->props.power == FB_BLANK_UNBLANK) + level = dev->props.brightness; + else + level = 0; + + r = 0; + if (md->has_bc) + acx565akm_set_brightness(md, level); + else + if (display->hw_config.set_backlight != NULL) + r = display->hw_config.set_backlight(display, level); + else + r = -ENODEV; + + mutex_unlock(&md->mutex); + + return r; +} + +static int acx565akm_bl_get_intensity(struct backlight_device *dev) +{ + struct acx565akm_device *md = dev_get_drvdata(&dev->dev); + struct omap_display *display = md->display; + + dev_dbg(&dev->dev, "%s\n", __func__); + + if (md->has_bc && display->hw_config.set_backlight == NULL) + return -ENODEV; + + if (dev->props.fb_blank == FB_BLANK_UNBLANK && + dev->props.power == FB_BLANK_UNBLANK) { + if (md->has_bc) + return acx565akm_get_actual_brightness(md); + else + return dev->props.brightness; + } + + return 0; +} + +static struct backlight_ops acx565akm_bl_ops = { + .get_brightness = acx565akm_bl_get_intensity, + .update_status = acx565akm_bl_update_status, +}; + +static const char *cabc_modes[] = { + "off", /* used also always when CABC is not supported */ + "ui", + "still-image", + "moving-image", +}; + +static ssize_t show_cabc_mode(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct acx565akm_device *md = dev_get_drvdata(dev); + const char *mode_str; + int mode; + int len; + + if (!md->has_cabc) + mode = 0; + else + mode = get_cabc_mode(md); + mode_str = "unknown"; + if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes)) + mode_str = cabc_modes[mode]; + len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str); + + return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1; +} + +static ssize_t store_cabc_mode(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct acx565akm_device *md = dev_get_drvdata(dev); + int i; + + for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) { + const char *mode_str = cabc_modes[i]; + int cmp_len = strlen(mode_str); + + if (count > 0 && buf[count - 1] == '\n') + count--; + if (count != cmp_len) + continue; + + if (strncmp(buf, mode_str, cmp_len) == 0) + break; + } + + if (i == ARRAY_SIZE(cabc_modes)) + return -EINVAL; + + if (!md->has_cabc && i != 0) + return -EINVAL; + + mutex_lock(&md->mutex); + set_cabc_mode(md, i); + mutex_unlock(&md->mutex); + + return count; +} + +static ssize_t show_cabc_available_modes(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct acx565akm_device *md = dev_get_drvdata(dev); + int len; + int i; + + if (!md->has_cabc) + return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]); + + for (i = 0, len = 0; + len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++) + len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s", + i ? " " : "", cabc_modes[i], + i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : ""); + + return len < PAGE_SIZE ? len : PAGE_SIZE - 1; +} + +static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR, + show_cabc_mode, store_cabc_mode); +static DEVICE_ATTR(cabc_available_modes, S_IRUGO, + show_cabc_available_modes, NULL); + +static struct attribute *bldev_attrs[] = { + &dev_attr_cabc_mode.attr, + &dev_attr_cabc_available_modes.attr, + NULL, +}; + +static struct attribute_group bldev_attr_group = { + .attrs = bldev_attrs, +}; + +static int acx565akm_panel_init(struct omap_display *display) +{ + struct omap_panel *panel = display->panel; + struct acx565akm_panel_data *panel_data = display->hw_config.panel_data; + struct acx565akm_device *md = (struct acx565akm_device *)panel->priv; + + struct backlight_device *bldev; + int brightness; + int max_brightness; + int r; + + dev_dbg(&md->spi->dev, "%s\n", __func__); + + if (!panel_data) { + dev_err(&md->spi->dev, "no panel data\n"); + return -ENODEV; + } + + mutex_init(&md->mutex); + md->display = display; + + if (display->hw_config.panel_enable) + display->hw_config.panel_enable(display); + + md->enabled = panel_enabled(md); + + r = panel_detect(md); + if (r) { + if (!md->enabled && display->hw_config.panel_disable) + display->hw_config.panel_disable(display); + mutex_unlock(&md->mutex); + return r; + } + + if (!panel_data->bc_connected) { + md->has_bc = 0; + md->has_cabc = 0; + } + +#if 0 + acx565akm_set_mode(display, panel->timings.x_res, panel->timings.y_res, + panel->bpp); +#endif + + if (!md->enabled) + display->hw_config.panel_disable(display); + + bldev = backlight_device_register("acx565akm", &md->spi->dev, + md, &acx565akm_bl_ops); + md->bl_dev = bldev; + + if (md->has_cabc) { + r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group); + if (r) { + dev_err(&bldev->dev, "failed to create sysfs files\n"); + backlight_device_unregister(bldev); + return r; + } + } + + bldev->props.fb_blank = FB_BLANK_UNBLANK; + bldev->props.power = FB_BLANK_UNBLANK; + + if (md->has_bc) + max_brightness = 255; + else + max_brightness = display->hw_config.max_backlight_level; + + if (md->has_bc) + brightness = acx565akm_get_actual_brightness(md); + else { + if (display->hw_config.get_backlight != NULL) + brightness = display->hw_config.get_backlight(display); + else + brightness = 0; + } + + bldev->props.max_brightness = max_brightness; + bldev->props.brightness = brightness; + acx565akm_bl_update_status(bldev); + + return 0; +} + +static struct omap_panel acx565akm_panel = { + .name = "panel-acx565akm", + .init = acx565akm_panel_init, + .suspend = acx565akm_panel_suspend, + .resume = acx565akm_panel_resume, + .enable = acx565akm_panel_enable, + .disable = acx565akm_panel_disable, + + .timings = { + .x_res = 800, + .y_res = 480, + + .pixel_clock = 24000, + + .hsw = 4, + .hfp = 16, + .hbp = 12, + + .vsw = 3, + .vfp = 3, + .vbp = 3, + }, + + .config = OMAP_DSS_LCD_TFT, + + .recommended_bpp = 16, + + /* + * supported modes: 12bpp(444), 16bpp(565), 18bpp(666), 24bpp(888) + * resolutions. + */ +}; + +static int acx565akm_spi_probe(struct spi_device *spi) +{ + struct acx565akm_device *md; + + dev_dbg(&md->spi->dev, "%s\n", __func__); + + md = kzalloc(sizeof(*md), GFP_KERNEL); + if (md == NULL) { + dev_err(&spi->dev, "out of memory\n"); + return -ENOMEM; + } + + spi->mode = SPI_MODE_3; + md->spi = spi; + dev_set_drvdata(&spi->dev, md); + md->panel = acx565akm_panel; + acx565akm_panel.priv = md; + + omap_dss_register_panel(&acx565akm_panel); + + return 0; +} + +static int acx565akm_spi_remove(struct spi_device *spi) +{ + struct acx565akm_device *md = dev_get_drvdata(&spi->dev); + + dev_dbg(&md->spi->dev, "%s\n", __func__); + + sysfs_remove_group(&md->bl_dev->dev.kobj, &bldev_attr_group); + backlight_device_unregister(md->bl_dev); + omap_dss_unregister_panel(&acx565akm_panel); + + kfree(md); + + return 0; +} + +static struct spi_driver acx565akm_spi_driver = { + .driver = { + .name = "acx565akm", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .probe = acx565akm_spi_probe, + .remove = __devexit_p(acx565akm_spi_remove), +}; + +static int __init acx565akm_init(void) +{ + return spi_register_driver(&acx565akm_spi_driver); +} + +static void __exit acx565akm_exit(void) +{ + spi_unregister_driver(&acx565akm_spi_driver); +} + +module_init(acx565akm_init); +module_exit(acx565akm_exit); + +MODULE_AUTHOR("Tomi Valkeinen "); +MODULE_DESCRIPTION("acx565akm LCD Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/omap2/displays/panel-acx565akm.h b/drivers/video/omap2/displays/panel-acx565akm.h new file mode 100644 index 0000000..6d3727b --- /dev/null +++ b/drivers/video/omap2/displays/panel-acx565akm.h @@ -0,0 +1,9 @@ +#ifndef __DRIVERS_VIDEO_OMAP2_DISPLAYS_PANEL_ACX565AKM_H +#define __DRIVERS_VIDEO_OMAP2_DISPLAYS_PANEL_ACX565AKM_H + +struct acx565akm_panel_data { + unsigned bc_connected:1; +}; + +#endif + -- 1.5.6.5