| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tomi Valkeinen | 3608 | 97.94% | 1 | 10.00% |
| Dmitry Torokhov | 62 | 1.68% | 2 | 20.00% |
| Thomas Zimmermann | 7 | 0.19% | 1 | 10.00% |
| Thomas Gleixner | 2 | 0.05% | 1 | 10.00% |
| Qinglang Miao | 1 | 0.03% | 1 | 10.00% |
| Arvind Yadav | 1 | 0.03% | 1 | 10.00% |
| Uwe Kleine-König | 1 | 0.03% | 1 | 10.00% |
| Yang Guang | 1 | 0.03% | 1 | 10.00% |
| Peter Ujfalusi | 1 | 0.03% | 1 | 10.00% |
| Total | 3684 | 10 |
// SPDX-License-Identifier: GPL-2.0-only /* * Sony ACX565AKM LCD Panel driver * * Copyright (C) 2010 Nokia Corporation * * Original Driver Author: Imre Deak <imre.deak@nokia.com> * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com> * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.com> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/delay.h> #include <linux/spi/spi.h> #include <linux/jiffies.h> #include <linux/sched.h> #include <linux/backlight.h> #include <linux/fb.h> #include <linux/gpio/consumer.h> #include <linux/of.h> #include <video/omapfb_dss.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 panel_drv_data { struct omap_dss_device dssdev; struct omap_dss_device *in; struct gpio_desc *reset_gpio; int datapairs; struct omap_video_timings videomode; char *name; int enabled; int model; int revision; u8 display_id[3]; unsigned has_bc:1; unsigned has_cabc:1; unsigned cabc_mode; 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 backlight_device *bl_dev; }; static const struct omap_video_timings acx565akm_panel_timings = { .x_res = 800, .y_res = 480, .pixelclock = 24000000, .hfp = 28, .hsw = 4, .hbp = 24, .vfp = 3, .vsw = 3, .vbp = 4, .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, .de_level = OMAPDSS_SIG_ACTIVE_HIGH, .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE, }; #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) static void acx565akm_transfer(struct panel_drv_data *ddata, 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(ddata->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(ddata->spi, &m); if (r < 0) dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r); } static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd) { acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0); } static inline void acx565akm_write(struct panel_drv_data *ddata, int reg, const u8 *buf, int len) { acx565akm_transfer(ddata, reg, buf, len, NULL, 0); } static inline void acx565akm_read(struct panel_drv_data *ddata, int reg, u8 *buf, int len) { acx565akm_transfer(ddata, reg, NULL, 0, buf, len); } static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec) { ddata->hw_guard_wait = msecs_to_jiffies(guard_msec); ddata->hw_guard_end = jiffies + ddata->hw_guard_wait; } static void hw_guard_wait(struct panel_drv_data *ddata) { unsigned long wait = ddata->hw_guard_end - jiffies; if ((long)wait > 0 && wait <= ddata->hw_guard_wait) { set_current_state(TASK_UNINTERRUPTIBLE); schedule_timeout(wait); } } static void set_sleep_mode(struct panel_drv_data *ddata, int on) { int cmd; if (on) cmd = MIPID_CMD_SLEEP_IN; else cmd = MIPID_CMD_SLEEP_OUT; /* * We have to keep 120msec between sleep in/out commands. * (8.2.15, 8.2.16). */ hw_guard_wait(ddata); acx565akm_cmd(ddata, cmd); hw_guard_start(ddata, 120); } static void set_display_state(struct panel_drv_data *ddata, int enabled) { int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF; acx565akm_cmd(ddata, cmd); } static int panel_enabled(struct panel_drv_data *ddata) { u32 disp_status; int enabled; acx565akm_read(ddata, 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(&ddata->spi->dev, "LCD panel %senabled by bootloader (status 0x%04x)\n", enabled ? "" : "not ", disp_status); return enabled; } static int panel_detect(struct panel_drv_data *ddata) { acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3); dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n", ddata->display_id[0], ddata->display_id[1], ddata->display_id[2]); switch (ddata->display_id[0]) { case 0x10: ddata->model = MIPID_VER_ACX565AKM; ddata->name = "acx565akm"; ddata->has_bc = 1; ddata->has_cabc = 1; break; case 0x29: ddata->model = MIPID_VER_L4F00311; ddata->name = "l4f00311"; break; case 0x45: ddata->model = MIPID_VER_LPH8923; ddata->name = "lph8923"; break; case 0x83: ddata->model = MIPID_VER_LS041Y3; ddata->name = "ls041y3"; break; default: ddata->name = "unknown"; dev_err(&ddata->spi->dev, "invalid display ID\n"); return -ENODEV; } ddata->revision = ddata->display_id[1]; dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n", ddata->name, ddata->revision); return 0; } /*----------------------Backlight Control-------------------------*/ static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable) { u16 ctrl; acx565akm_read(ddata, 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(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2); } static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode) { u16 cabc_ctrl; ddata->cabc_mode = mode; if (!ddata->enabled) return; cabc_ctrl = 0; acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1); cabc_ctrl &= ~3; cabc_ctrl |= (1 << 8) | (mode & 3); acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2); } static unsigned get_cabc_mode(struct panel_drv_data *ddata) { return ddata->cabc_mode; } static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata) { u8 cabc_ctrl; acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1); return cabc_ctrl & 3; } static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level) { int bv; bv = level | (1 << 8); acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2); if (level) enable_backlight_ctrl(ddata, 1); else enable_backlight_ctrl(ddata, 0); } static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata) { u8 bv; acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1); return bv; } static int acx565akm_bl_update_status(struct backlight_device *dev) { struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); int level; dev_dbg(&ddata->spi->dev, "%s\n", __func__); level = backlight_get_brightness(dev); if (ddata->has_bc) acx565akm_set_brightness(ddata, level); else return -ENODEV; return 0; } static int acx565akm_bl_get_intensity(struct backlight_device *dev) { struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); dev_dbg(&dev->dev, "%s\n", __func__); if (!ddata->has_bc) return -ENODEV; if (!backlight_is_blank(dev)) { if (ddata->has_bc) return acx565akm_get_actual_brightness(ddata); else return dev->props.brightness; } return 0; } static int acx565akm_bl_update_status_locked(struct backlight_device *dev) { struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); int r; mutex_lock(&ddata->mutex); r = acx565akm_bl_update_status(dev); mutex_unlock(&ddata->mutex); return r; } static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev) { struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); int r; mutex_lock(&ddata->mutex); r = acx565akm_bl_get_intensity(dev); mutex_unlock(&ddata->mutex); return r; } static const struct backlight_ops acx565akm_bl_ops = { .get_brightness = acx565akm_bl_get_intensity_locked, .update_status = acx565akm_bl_update_status_locked, }; /*--------------------Auto Brightness control via Sysfs---------------------*/ static const char * const cabc_modes[] = { "off", /* always used 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 panel_drv_data *ddata = dev_get_drvdata(dev); const char *mode_str; int mode; int len; if (!ddata->has_cabc) mode = 0; else mode = get_cabc_mode(ddata); 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 panel_drv_data *ddata = 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 (!ddata->has_cabc && i != 0) return -EINVAL; mutex_lock(&ddata->mutex); set_cabc_mode(ddata, i); mutex_unlock(&ddata->mutex); return count; } static ssize_t show_cabc_available_modes(struct device *dev, struct device_attribute *attr, char *buf) { struct panel_drv_data *ddata = dev_get_drvdata(dev); int len; int i; if (!ddata->has_cabc) return sysfs_emit(buf, "%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 const struct attribute_group bldev_attr_group = { .attrs = bldev_attrs, }; static int acx565akm_connect(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; if (omapdss_device_is_connected(dssdev)) return 0; return in->ops.sdi->connect(in, dssdev); } static void acx565akm_disconnect(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; if (!omapdss_device_is_connected(dssdev)) return; in->ops.sdi->disconnect(in, dssdev); } static int acx565akm_panel_power_on(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; int r; dev_dbg(&ddata->spi->dev, "%s\n", __func__); in->ops.sdi->set_timings(in, &ddata->videomode); if (ddata->datapairs > 0) in->ops.sdi->set_datapairs(in, ddata->datapairs); r = in->ops.sdi->enable(in); if (r) { pr_err("%s sdi enable failed\n", __func__); return r; } /*FIXME tweak me */ msleep(50); /* * Note that we appear to activate the reset line here. However * existing DTSes specified incorrect polarity for it (active high), * so in fact this deasserts the reset line. */ if (ddata->reset_gpio) gpiod_set_value_cansleep(ddata->reset_gpio, 1); if (ddata->enabled) { dev_dbg(&ddata->spi->dev, "panel already enabled\n"); return 0; } /* * We have to meet all the following delay requirements: * 1. tRW: reset pulse width 10usec (7.12.1) * 2. tRT: reset cancel time 5msec (7.12.1) * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst * case (7.6.2) * 4. 120msec before the sleep out command (7.12.1) */ msleep(120); set_sleep_mode(ddata, 0); ddata->enabled = 1; /* 5msec between sleep out and the next command. (8.2.16) */ usleep_range(5000, 10000); set_display_state(ddata, 1); set_cabc_mode(ddata, ddata->cabc_mode); return acx565akm_bl_update_status(ddata->bl_dev); } static void acx565akm_panel_power_off(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; dev_dbg(dssdev->dev, "%s\n", __func__); if (!ddata->enabled) return; set_display_state(ddata, 0); set_sleep_mode(ddata, 1); ddata->enabled = 0; /* * We have to provide PCLK,HS,VS signals for 2 frames (worst case * ~50msec) after sending the sleep in command and asserting the * reset signal. We probably could assert the reset w/o the delay * but we still delay to avoid possible artifacts. (7.6.1) */ msleep(50); /* see comment in acx565akm_panel_power_on() */ if (ddata->reset_gpio) gpiod_set_value_cansleep(ddata->reset_gpio, 0); /* FIXME need to tweak this delay */ msleep(100); in->ops.sdi->disable(in); } static int acx565akm_enable(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); int r; dev_dbg(dssdev->dev, "%s\n", __func__); if (!omapdss_device_is_connected(dssdev)) return -ENODEV; if (omapdss_device_is_enabled(dssdev)) return 0; mutex_lock(&ddata->mutex); r = acx565akm_panel_power_on(dssdev); mutex_unlock(&ddata->mutex); if (r) return r; dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; return 0; } static void acx565akm_disable(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); dev_dbg(dssdev->dev, "%s\n", __func__); if (!omapdss_device_is_enabled(dssdev)) return; mutex_lock(&ddata->mutex); acx565akm_panel_power_off(dssdev); mutex_unlock(&ddata->mutex); dssdev->state = OMAP_DSS_DISPLAY_DISABLED; } static void acx565akm_set_timings(struct omap_dss_device *dssdev, struct omap_video_timings *timings) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; ddata->videomode = *timings; dssdev->panel.timings = *timings; in->ops.sdi->set_timings(in, timings); } static void acx565akm_get_timings(struct omap_dss_device *dssdev, struct omap_video_timings *timings) { struct panel_drv_data *ddata = to_panel_data(dssdev); *timings = ddata->videomode; } static int acx565akm_check_timings(struct omap_dss_device *dssdev, struct omap_video_timings *timings) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; return in->ops.sdi->check_timings(in, timings); } static struct omap_dss_driver acx565akm_ops = { .connect = acx565akm_connect, .disconnect = acx565akm_disconnect, .enable = acx565akm_enable, .disable = acx565akm_disable, .set_timings = acx565akm_set_timings, .get_timings = acx565akm_get_timings, .check_timings = acx565akm_check_timings, .get_resolution = omapdss_default_get_resolution, }; static int acx565akm_probe(struct spi_device *spi) { struct panel_drv_data *ddata; struct omap_dss_device *dssdev; struct backlight_device *bldev; int max_brightness, brightness; struct backlight_properties props; int r; dev_dbg(&spi->dev, "%s\n", __func__); if (!spi->dev.of_node) return -ENODEV; spi->mode = SPI_MODE_3; ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL); if (ddata == NULL) return -ENOMEM; dev_set_drvdata(&spi->dev, ddata); ddata->spi = spi; mutex_init(&ddata->mutex); ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node); r = PTR_ERR_OR_ZERO(ddata->in); if (r) { dev_err(&spi->dev, "failed to find video source\n"); return r; } ddata->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_LOW); r = PTR_ERR_OR_ZERO(ddata->reset_gpio); if (r) goto err_gpio; if (ddata->reset_gpio) { gpiod_set_consumer_name(ddata->reset_gpio, "lcd reset"); /* release the reset line */ gpiod_set_value_cansleep(ddata->reset_gpio, 1); } /* * After reset we have to wait 5 msec before the first * command can be sent. */ usleep_range(5000, 10000); ddata->enabled = panel_enabled(ddata); r = panel_detect(ddata); if (!ddata->enabled && ddata->reset_gpio) gpiod_set_value_cansleep(ddata->reset_gpio, 0); if (r) { dev_err(&spi->dev, "%s panel detect error\n", __func__); goto err_detect; } memset(&props, 0, sizeof(props)); props.power = FB_BLANK_UNBLANK; props.type = BACKLIGHT_RAW; bldev = backlight_device_register("acx565akm", &ddata->spi->dev, ddata, &acx565akm_bl_ops, &props); if (IS_ERR(bldev)) { r = PTR_ERR(bldev); goto err_reg_bl; } ddata->bl_dev = bldev; if (ddata->has_cabc) { r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group); if (r) { dev_err(&bldev->dev, "%s failed to create sysfs files\n", __func__); goto err_sysfs; } ddata->cabc_mode = get_hw_cabc_mode(ddata); } max_brightness = 255; if (ddata->has_bc) brightness = acx565akm_get_actual_brightness(ddata); else brightness = 0; bldev->props.max_brightness = max_brightness; bldev->props.brightness = brightness; acx565akm_bl_update_status(bldev); ddata->videomode = acx565akm_panel_timings; dssdev = &ddata->dssdev; dssdev->dev = &spi->dev; dssdev->driver = &acx565akm_ops; dssdev->type = OMAP_DISPLAY_TYPE_SDI; dssdev->owner = THIS_MODULE; dssdev->panel.timings = ddata->videomode; r = omapdss_register_display(dssdev); if (r) { dev_err(&spi->dev, "Failed to register panel\n"); goto err_reg; } return 0; err_reg: sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group); err_sysfs: backlight_device_unregister(bldev); err_reg_bl: err_detect: err_gpio: omap_dss_put_device(ddata->in); return r; } static void acx565akm_remove(struct spi_device *spi) { struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); struct omap_dss_device *dssdev = &ddata->dssdev; struct omap_dss_device *in = ddata->in; dev_dbg(&ddata->spi->dev, "%s\n", __func__); sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group); backlight_device_unregister(ddata->bl_dev); omapdss_unregister_display(dssdev); acx565akm_disable(dssdev); acx565akm_disconnect(dssdev); omap_dss_put_device(in); } static const struct of_device_id acx565akm_of_match[] = { { .compatible = "omapdss,sony,acx565akm", }, {}, }; MODULE_DEVICE_TABLE(of, acx565akm_of_match); static struct spi_driver acx565akm_driver = { .driver = { .name = "acx565akm", .of_match_table = acx565akm_of_match, .suppress_bind_attrs = true, }, .probe = acx565akm_probe, .remove = acx565akm_remove, }; module_spi_driver(acx565akm_driver); MODULE_AUTHOR("Nokia Corporation"); MODULE_DESCRIPTION("acx565akm LCD Driver"); MODULE_LICENSE("GPL");
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