diff options
author | Sebastian Reichel <sebastian.reichel@collabora.com> | 2020-12-15 12:46:12 +0200 |
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committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2020-12-15 16:08:25 +0200 |
commit | cf64148abcfd5ac1d6b1526950a48a497b180f61 (patch) | |
tree | 4017b6c3ff05e0a3b85552f97ad2fdd575837e4a /drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c | |
parent | 85101487326a96fbe724eb1f05f4406ceb50dad9 (diff) | |
download | linux-cf64148abcfd5ac1d6b1526950a48a497b180f61.tar.bz2 |
drm/panel: Move OMAP's DSI command mode panel driver
The panel driver is no longer using any OMAP specific APIs, so
let's move it into the generic panel directory.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-40-tomi.valkeinen@ti.com
Diffstat (limited to 'drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c')
-rw-r--r-- | drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c | 637 |
1 files changed, 0 insertions, 637 deletions
diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c deleted file mode 100644 index 21df1997e7d1..000000000000 --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c +++ /dev/null @@ -1,637 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Generic DSI Command Mode panel driver - * - * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/ - * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> - */ - -#include <linux/backlight.h> -#include <linux/delay.h> -#include <linux/gpio/consumer.h> -#include <linux/jiffies.h> -#include <linux/module.h> -#include <linux/sched/signal.h> -#include <linux/slab.h> -#include <linux/of_device.h> -#include <linux/regulator/consumer.h> - -#include <drm/drm_connector.h> -#include <drm/drm_mipi_dsi.h> -#include <drm/drm_modes.h> -#include <drm/drm_panel.h> - -#include <video/display_timing.h> -#include <video/mipi_display.h> -#include <video/of_display_timing.h> -#include <video/videomode.h> - -#define DCS_READ_NUM_ERRORS 0x05 -#define DCS_GET_ID1 0xda -#define DCS_GET_ID2 0xdb -#define DCS_GET_ID3 0xdc - -#define DCS_REGULATOR_SUPPLY_NUM 2 - -struct panel_drv_data { - struct mipi_dsi_device *dsi; - struct drm_panel panel; - struct drm_display_mode mode; - - struct mutex lock; - - struct backlight_device *bldev; - struct backlight_device *extbldev; - - 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 */ - - /* panel HW configuration from DT or platform data */ - struct gpio_desc *reset_gpio; - - struct regulator_bulk_data supplies[DCS_REGULATOR_SUPPLY_NUM]; - - bool use_dsi_backlight; - - int width_mm; - int height_mm; - - /* runtime variables */ - bool enabled; - - bool intro_printed; -}; - -static inline struct panel_drv_data *panel_to_ddata(struct drm_panel *panel) -{ - return container_of(panel, struct panel_drv_data, panel); -} - -static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable); - -static void dsicm_bl_power(struct panel_drv_data *ddata, bool enable) -{ - struct backlight_device *backlight; - - if (ddata->bldev) - backlight = ddata->bldev; - else if (ddata->extbldev) - backlight = ddata->extbldev; - else - return; - - if (enable) { - backlight->props.fb_blank = FB_BLANK_UNBLANK; - backlight->props.state = ~(BL_CORE_FBBLANK | BL_CORE_SUSPENDED); - backlight->props.power = FB_BLANK_UNBLANK; - } else { - backlight->props.fb_blank = FB_BLANK_NORMAL; - backlight->props.power = FB_BLANK_POWERDOWN; - backlight->props.state |= BL_CORE_FBBLANK | BL_CORE_SUSPENDED; - } - - backlight_update_status(backlight); -} - -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 int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data) -{ - return mipi_dsi_dcs_read(ddata->dsi, dcs_cmd, data, 1); -} - -static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param) -{ - return mipi_dsi_dcs_write(ddata->dsi, dcs_cmd, ¶m, 1); -} - -static int dsicm_sleep_in(struct panel_drv_data *ddata) - -{ - int r; - - hw_guard_wait(ddata); - - r = mipi_dsi_dcs_enter_sleep_mode(ddata->dsi); - if (r) - return r; - - hw_guard_start(ddata, 120); - - usleep_range(5000, 10000); - - return 0; -} - -static int dsicm_sleep_out(struct panel_drv_data *ddata) -{ - int r; - - hw_guard_wait(ddata); - - r = mipi_dsi_dcs_exit_sleep_mode(ddata->dsi); - if (r) - return r; - - hw_guard_start(ddata, 120); - - usleep_range(5000, 10000); - - return 0; -} - -static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3) -{ - int r; - - r = dsicm_dcs_read_1(ddata, DCS_GET_ID1, id1); - if (r) - return r; - r = dsicm_dcs_read_1(ddata, DCS_GET_ID2, id2); - if (r) - return r; - r = dsicm_dcs_read_1(ddata, DCS_GET_ID3, id3); - if (r) - return r; - - return 0; -} - -static int dsicm_bl_update_status(struct backlight_device *dev) -{ - struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev); - int r = 0; - int level; - - if (dev->props.fb_blank == FB_BLANK_UNBLANK && - dev->props.power == FB_BLANK_UNBLANK) - level = dev->props.brightness; - else - level = 0; - - dev_dbg(&ddata->dsi->dev, "update brightness to %d\n", level); - - mutex_lock(&ddata->lock); - - if (ddata->enabled) { - if (!r) - r = dsicm_dcs_write_1( - ddata, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, level); - } - - mutex_unlock(&ddata->lock); - - return r; -} - -static int dsicm_bl_get_intensity(struct backlight_device *dev) -{ - if (dev->props.fb_blank == FB_BLANK_UNBLANK && - dev->props.power == FB_BLANK_UNBLANK) - return dev->props.brightness; - - return 0; -} - -static const struct backlight_ops dsicm_bl_ops = { - .get_brightness = dsicm_bl_get_intensity, - .update_status = dsicm_bl_update_status, -}; - -static ssize_t num_dsi_errors_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dev); - u8 errors = 0; - int r = -ENODEV; - - mutex_lock(&ddata->lock); - - if (ddata->enabled) - r = dsicm_dcs_read_1(ddata, DCS_READ_NUM_ERRORS, &errors); - - mutex_unlock(&ddata->lock); - - if (r) - return r; - - return snprintf(buf, PAGE_SIZE, "%d\n", errors); -} - -static ssize_t hw_revision_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct panel_drv_data *ddata = dev_get_drvdata(dev); - u8 id1, id2, id3; - int r = -ENODEV; - - mutex_lock(&ddata->lock); - - if (ddata->enabled) - r = dsicm_get_id(ddata, &id1, &id2, &id3); - - mutex_unlock(&ddata->lock); - - if (r) - return r; - - return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x\n", id1, id2, id3); -} - -static DEVICE_ATTR_RO(num_dsi_errors); -static DEVICE_ATTR_RO(hw_revision); - -static struct attribute *dsicm_attrs[] = { - &dev_attr_num_dsi_errors.attr, - &dev_attr_hw_revision.attr, - NULL, -}; - -static const struct attribute_group dsicm_attr_group = { - .attrs = dsicm_attrs, -}; - -static void dsicm_hw_reset(struct panel_drv_data *ddata) -{ - gpiod_set_value(ddata->reset_gpio, 1); - udelay(10); - /* reset the panel */ - gpiod_set_value(ddata->reset_gpio, 0); - /* assert reset */ - udelay(10); - gpiod_set_value(ddata->reset_gpio, 1); - /* wait after releasing reset */ - usleep_range(5000, 10000); -} - -static int dsicm_power_on(struct panel_drv_data *ddata) -{ - u8 id1, id2, id3; - int r; - - dsicm_hw_reset(ddata); - - ddata->dsi->mode_flags |= MIPI_DSI_MODE_LPM; - - r = dsicm_sleep_out(ddata); - if (r) - goto err; - - r = dsicm_get_id(ddata, &id1, &id2, &id3); - if (r) - goto err; - - r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0xff); - if (r) - goto err; - - r = dsicm_dcs_write_1(ddata, MIPI_DCS_WRITE_CONTROL_DISPLAY, - (1<<2) | (1<<5)); /* BL | BCTRL */ - if (r) - goto err; - - r = mipi_dsi_dcs_set_pixel_format(ddata->dsi, MIPI_DCS_PIXEL_FMT_24BIT); - if (r) - goto err; - - r = mipi_dsi_dcs_set_display_on(ddata->dsi); - if (r) - goto err; - - r = _dsicm_enable_te(ddata, true); - if (r) - goto err; - - ddata->enabled = true; - - if (!ddata->intro_printed) { - dev_info(&ddata->dsi->dev, "panel revision %02x.%02x.%02x\n", - id1, id2, id3); - ddata->intro_printed = true; - } - - ddata->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; - - return 0; -err: - dev_err(&ddata->dsi->dev, "error while enabling panel, issuing HW reset\n"); - - dsicm_hw_reset(ddata); - - return r; -} - -static int dsicm_power_off(struct panel_drv_data *ddata) -{ - int r; - - ddata->enabled = false; - - r = mipi_dsi_dcs_set_display_off(ddata->dsi); - if (!r) - r = dsicm_sleep_in(ddata); - - if (r) { - dev_err(&ddata->dsi->dev, - "error disabling panel, issuing HW reset\n"); - dsicm_hw_reset(ddata); - } - - return r; -} - -static int dsicm_prepare(struct drm_panel *panel) -{ - struct panel_drv_data *ddata = panel_to_ddata(panel); - int r; - - r = regulator_bulk_enable(ARRAY_SIZE(ddata->supplies), ddata->supplies); - if (r) - dev_err(&ddata->dsi->dev, "failed to enable supplies: %d\n", r); - - return r; -} - -static int dsicm_enable(struct drm_panel *panel) -{ - struct panel_drv_data *ddata = panel_to_ddata(panel); - int r; - - mutex_lock(&ddata->lock); - - r = dsicm_power_on(ddata); - if (r) - goto err; - - mutex_unlock(&ddata->lock); - - dsicm_bl_power(ddata, true); - - return 0; -err: - dev_err(&ddata->dsi->dev, "enable failed (%d)\n", r); - mutex_unlock(&ddata->lock); - return r; -} - -static int dsicm_unprepare(struct drm_panel *panel) -{ - struct panel_drv_data *ddata = panel_to_ddata(panel); - int r; - - r = regulator_bulk_disable(ARRAY_SIZE(ddata->supplies), ddata->supplies); - if (r) - dev_err(&ddata->dsi->dev, "failed to disable supplies: %d\n", r); - - return r; -} - -static int dsicm_disable(struct drm_panel *panel) -{ - struct panel_drv_data *ddata = panel_to_ddata(panel); - int r; - - dsicm_bl_power(ddata, false); - - mutex_lock(&ddata->lock); - - r = dsicm_power_off(ddata); - - mutex_unlock(&ddata->lock); - - return r; -} - -static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable) -{ - struct mipi_dsi_device *dsi = ddata->dsi; - int r; - - if (enable) - r = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); - else - r = mipi_dsi_dcs_set_tear_off(dsi); - - /* possible panel bug */ - msleep(100); - - return r; -} - -static int dsicm_get_modes(struct drm_panel *panel, - struct drm_connector *connector) -{ - struct panel_drv_data *ddata = panel_to_ddata(panel); - struct drm_display_mode *mode; - - mode = drm_mode_duplicate(connector->dev, &ddata->mode); - if (!mode) { - dev_err(&ddata->dsi->dev, "failed to add mode %ux%ux@%u kHz\n", - ddata->mode.hdisplay, ddata->mode.vdisplay, - ddata->mode.clock); - return -ENOMEM; - } - - drm_mode_set_name(mode); - mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; - - connector->display_info.width_mm = ddata->width_mm; - connector->display_info.height_mm = ddata->height_mm; - - drm_mode_probed_add(connector, mode); - - return 1; -} - -static const struct drm_panel_funcs dsicm_panel_funcs = { - .unprepare = dsicm_unprepare, - .disable = dsicm_disable, - .prepare = dsicm_prepare, - .enable = dsicm_enable, - .get_modes = dsicm_get_modes, -}; - -static int dsicm_probe_of(struct mipi_dsi_device *dsi) -{ - struct device_node *node = dsi->dev.of_node; - struct backlight_device *backlight; - struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi); - struct display_timing timing; - struct videomode vm = { - .hactive = 864, - .vactive = 480, - }; - int err; - - ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); - if (IS_ERR(ddata->reset_gpio)) { - err = PTR_ERR(ddata->reset_gpio); - dev_err(&dsi->dev, "reset gpio request failed: %d", err); - return err; - } - - err = of_get_display_timing(node, "panel-timing", &timing); - if (!err) { - videomode_from_timing(&timing, &vm); - } else { - dev_warn(&dsi->dev, - "failed to get video timing, using defaults\n"); - } - - if (!vm.pixelclock) - vm.pixelclock = vm.hactive * vm.vactive * 60; - drm_display_mode_from_videomode(&vm, &ddata->mode); - - ddata->width_mm = 0; - of_property_read_u32(node, "width-mm", &ddata->width_mm); - - ddata->height_mm = 0; - of_property_read_u32(node, "height-mm", &ddata->height_mm); - - ddata->supplies[0].supply = "vpnl"; - ddata->supplies[1].supply = "vddi"; - err = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ddata->supplies), - ddata->supplies); - if (err) - return err; - - backlight = devm_of_find_backlight(&dsi->dev); - if (IS_ERR(backlight)) - return PTR_ERR(backlight); - - /* If no backlight device is found assume native backlight support */ - if (backlight) - ddata->extbldev = backlight; - else - ddata->use_dsi_backlight = true; - - return 0; -} - -static int dsicm_probe(struct mipi_dsi_device *dsi) -{ - struct panel_drv_data *ddata; - struct backlight_device *bldev = NULL; - struct device *dev = &dsi->dev; - int r; - - dev_dbg(dev, "probe\n"); - - ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); - if (!ddata) - return -ENOMEM; - - mipi_dsi_set_drvdata(dsi, ddata); - ddata->dsi = dsi; - - r = dsicm_probe_of(dsi); - if (r) - return r; - - mutex_init(&ddata->lock); - - dsicm_hw_reset(ddata); - - drm_panel_init(&ddata->panel, dev, &dsicm_panel_funcs, - DRM_MODE_CONNECTOR_DSI); - - if (ddata->use_dsi_backlight) { - struct backlight_properties props = { 0 }; - props.max_brightness = 255; - props.type = BACKLIGHT_RAW; - - bldev = devm_backlight_device_register(dev, dev_name(dev), - dev, ddata, &dsicm_bl_ops, &props); - if (IS_ERR(bldev)) { - r = PTR_ERR(bldev); - goto err_bl; - } - - ddata->bldev = bldev; - } - - r = sysfs_create_group(&dev->kobj, &dsicm_attr_group); - if (r) { - dev_err(dev, "failed to create sysfs files\n"); - goto err_bl; - } - - dsi->lanes = 2; - dsi->format = MIPI_DSI_FMT_RGB888; - dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS | - MIPI_DSI_MODE_EOT_PACKET; - dsi->hs_rate = 300000000; - dsi->lp_rate = 10000000; - - drm_panel_add(&ddata->panel); - - r = mipi_dsi_attach(dsi); - if (r < 0) - goto err_dsi_attach; - - return 0; - -err_dsi_attach: - drm_panel_remove(&ddata->panel); - sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group); -err_bl: - if (ddata->extbldev) - put_device(&ddata->extbldev->dev); - - return r; -} - -static int dsicm_remove(struct mipi_dsi_device *dsi) -{ - struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi); - - dev_dbg(&dsi->dev, "remove\n"); - - mipi_dsi_detach(dsi); - - drm_panel_remove(&ddata->panel); - - sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group); - - if (ddata->extbldev) - put_device(&ddata->extbldev->dev); - - return 0; -} - -static const struct of_device_id dsicm_of_match[] = { - { .compatible = "panel-dsi-cm", }, - {}, -}; - -MODULE_DEVICE_TABLE(of, dsicm_of_match); - -static struct mipi_dsi_driver dsicm_driver = { - .probe = dsicm_probe, - .remove = dsicm_remove, - .driver = { - .name = "panel-dsi-cm", - .of_match_table = dsicm_of_match, - }, -}; -module_mipi_dsi_driver(dsicm_driver); - -MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); -MODULE_DESCRIPTION("Generic DSI Command Mode Panel Driver"); -MODULE_LICENSE("GPL"); |