653 lines
14 KiB
C
653 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Generic DSI Command Mode panel driver
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*
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* Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/
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* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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*/
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#include <linux/backlight.h>
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/jiffies.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regulator/consumer.h>
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#include <drm/drm_connector.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_modes.h>
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#include <drm/drm_panel.h>
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#include <video/mipi_display.h>
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#define DCS_GET_ID1 0xda
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#define DCS_GET_ID2 0xdb
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#define DCS_GET_ID3 0xdc
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#define DCS_REGULATOR_SUPPLY_NUM 2
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static const struct of_device_id dsicm_of_match[];
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struct dsic_panel_data {
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u32 xres;
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u32 yres;
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u32 refresh;
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u32 width_mm;
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u32 height_mm;
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u32 max_hs_rate;
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u32 max_lp_rate;
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bool te_support;
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};
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struct panel_drv_data {
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struct mipi_dsi_device *dsi;
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struct drm_panel panel;
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struct drm_display_mode mode;
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struct mutex lock;
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struct backlight_device *bldev;
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struct backlight_device *extbldev;
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unsigned long hw_guard_end; /* next value of jiffies when we can
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* issue the next sleep in/out command
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*/
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unsigned long hw_guard_wait; /* max guard time in jiffies */
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const struct dsic_panel_data *panel_data;
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struct gpio_desc *reset_gpio;
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struct regulator_bulk_data supplies[DCS_REGULATOR_SUPPLY_NUM];
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bool use_dsi_backlight;
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/* runtime variables */
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bool enabled;
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bool intro_printed;
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};
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static inline struct panel_drv_data *panel_to_ddata(struct drm_panel *panel)
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{
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return container_of(panel, struct panel_drv_data, panel);
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}
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static void dsicm_bl_power(struct panel_drv_data *ddata, bool enable)
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{
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struct backlight_device *backlight;
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if (ddata->bldev)
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backlight = ddata->bldev;
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else if (ddata->extbldev)
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backlight = ddata->extbldev;
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else
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return;
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if (enable)
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backlight_enable(backlight);
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else
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backlight_disable(backlight);
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}
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static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
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{
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ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
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ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
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}
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static void hw_guard_wait(struct panel_drv_data *ddata)
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{
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unsigned long wait = ddata->hw_guard_end - jiffies;
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if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
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set_current_state(TASK_UNINTERRUPTIBLE);
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schedule_timeout(wait);
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}
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}
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static int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data)
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{
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return mipi_dsi_dcs_read(ddata->dsi, dcs_cmd, data, 1);
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}
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static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param)
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{
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return mipi_dsi_dcs_write(ddata->dsi, dcs_cmd, ¶m, 1);
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}
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static int dsicm_sleep_in(struct panel_drv_data *ddata)
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{
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int r;
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hw_guard_wait(ddata);
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r = mipi_dsi_dcs_enter_sleep_mode(ddata->dsi);
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if (r)
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return r;
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hw_guard_start(ddata, 120);
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usleep_range(5000, 10000);
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return 0;
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}
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static int dsicm_sleep_out(struct panel_drv_data *ddata)
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{
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int r;
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hw_guard_wait(ddata);
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r = mipi_dsi_dcs_exit_sleep_mode(ddata->dsi);
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if (r)
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return r;
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hw_guard_start(ddata, 120);
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usleep_range(5000, 10000);
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return 0;
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}
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static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3)
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{
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int r;
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r = dsicm_dcs_read_1(ddata, DCS_GET_ID1, id1);
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if (r)
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return r;
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r = dsicm_dcs_read_1(ddata, DCS_GET_ID2, id2);
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if (r)
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return r;
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r = dsicm_dcs_read_1(ddata, DCS_GET_ID3, id3);
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if (r)
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return r;
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return 0;
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}
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static int dsicm_set_update_window(struct panel_drv_data *ddata)
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{
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struct mipi_dsi_device *dsi = ddata->dsi;
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int r;
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r = mipi_dsi_dcs_set_column_address(dsi, 0, ddata->mode.hdisplay - 1);
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if (r < 0)
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return r;
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r = mipi_dsi_dcs_set_page_address(dsi, 0, ddata->mode.vdisplay - 1);
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if (r < 0)
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return r;
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return 0;
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}
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static int dsicm_bl_update_status(struct backlight_device *dev)
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{
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struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
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int r = 0;
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int level = backlight_get_brightness(dev);
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dev_dbg(&ddata->dsi->dev, "update brightness to %d\n", level);
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mutex_lock(&ddata->lock);
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if (ddata->enabled)
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r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
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level);
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mutex_unlock(&ddata->lock);
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return r;
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}
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static int dsicm_bl_get_intensity(struct backlight_device *dev)
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{
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return backlight_get_brightness(dev);
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}
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static const struct backlight_ops dsicm_bl_ops = {
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.get_brightness = dsicm_bl_get_intensity,
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.update_status = dsicm_bl_update_status,
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};
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static ssize_t num_dsi_errors_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct panel_drv_data *ddata = dev_get_drvdata(dev);
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u8 errors = 0;
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int r = -ENODEV;
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mutex_lock(&ddata->lock);
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if (ddata->enabled)
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r = dsicm_dcs_read_1(ddata, MIPI_DCS_GET_ERROR_COUNT_ON_DSI, &errors);
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mutex_unlock(&ddata->lock);
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if (r)
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return r;
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return sysfs_emit(buf, "%d\n", errors);
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}
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static ssize_t hw_revision_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct panel_drv_data *ddata = dev_get_drvdata(dev);
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u8 id1, id2, id3;
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int r = -ENODEV;
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mutex_lock(&ddata->lock);
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if (ddata->enabled)
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r = dsicm_get_id(ddata, &id1, &id2, &id3);
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mutex_unlock(&ddata->lock);
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if (r)
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return r;
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return sysfs_emit(buf, "%02x.%02x.%02x\n", id1, id2, id3);
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}
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static DEVICE_ATTR_RO(num_dsi_errors);
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static DEVICE_ATTR_RO(hw_revision);
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static struct attribute *dsicm_attrs[] = {
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&dev_attr_num_dsi_errors.attr,
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&dev_attr_hw_revision.attr,
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NULL,
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};
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static const struct attribute_group dsicm_attr_group = {
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.attrs = dsicm_attrs,
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};
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static void dsicm_hw_reset(struct panel_drv_data *ddata)
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{
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gpiod_set_value(ddata->reset_gpio, 1);
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udelay(10);
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/* reset the panel */
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gpiod_set_value(ddata->reset_gpio, 0);
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/* assert reset */
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udelay(10);
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gpiod_set_value(ddata->reset_gpio, 1);
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/* wait after releasing reset */
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usleep_range(5000, 10000);
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}
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static int dsicm_power_on(struct panel_drv_data *ddata)
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{
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u8 id1, id2, id3;
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int r;
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dsicm_hw_reset(ddata);
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ddata->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
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r = dsicm_sleep_out(ddata);
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if (r)
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goto err;
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r = dsicm_get_id(ddata, &id1, &id2, &id3);
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if (r)
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goto err;
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r = dsicm_dcs_write_1(ddata, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, 0xff);
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if (r)
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goto err;
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r = dsicm_dcs_write_1(ddata, MIPI_DCS_WRITE_CONTROL_DISPLAY,
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(1<<2) | (1<<5)); /* BL | BCTRL */
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if (r)
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goto err;
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r = mipi_dsi_dcs_set_pixel_format(ddata->dsi, MIPI_DCS_PIXEL_FMT_24BIT);
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if (r)
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goto err;
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r = dsicm_set_update_window(ddata);
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if (r)
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goto err;
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r = mipi_dsi_dcs_set_display_on(ddata->dsi);
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if (r)
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goto err;
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if (ddata->panel_data->te_support) {
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r = mipi_dsi_dcs_set_tear_on(ddata->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
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if (r)
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goto err;
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}
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/* possible panel bug */
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msleep(100);
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ddata->enabled = true;
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if (!ddata->intro_printed) {
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dev_info(&ddata->dsi->dev, "panel revision %02x.%02x.%02x\n",
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id1, id2, id3);
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ddata->intro_printed = true;
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}
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ddata->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
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return 0;
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err:
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dev_err(&ddata->dsi->dev, "error while enabling panel, issuing HW reset\n");
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dsicm_hw_reset(ddata);
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return r;
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}
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static int dsicm_power_off(struct panel_drv_data *ddata)
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{
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int r;
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ddata->enabled = false;
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r = mipi_dsi_dcs_set_display_off(ddata->dsi);
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if (!r)
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r = dsicm_sleep_in(ddata);
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if (r) {
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dev_err(&ddata->dsi->dev,
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"error disabling panel, issuing HW reset\n");
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dsicm_hw_reset(ddata);
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}
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return r;
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}
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static int dsicm_prepare(struct drm_panel *panel)
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{
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struct panel_drv_data *ddata = panel_to_ddata(panel);
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int r;
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r = regulator_bulk_enable(ARRAY_SIZE(ddata->supplies), ddata->supplies);
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if (r)
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dev_err(&ddata->dsi->dev, "failed to enable supplies: %d\n", r);
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return r;
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}
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static int dsicm_enable(struct drm_panel *panel)
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{
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struct panel_drv_data *ddata = panel_to_ddata(panel);
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int r;
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mutex_lock(&ddata->lock);
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r = dsicm_power_on(ddata);
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if (r)
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goto err;
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mutex_unlock(&ddata->lock);
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dsicm_bl_power(ddata, true);
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return 0;
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err:
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dev_err(&ddata->dsi->dev, "enable failed (%d)\n", r);
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mutex_unlock(&ddata->lock);
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return r;
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}
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static int dsicm_unprepare(struct drm_panel *panel)
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{
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struct panel_drv_data *ddata = panel_to_ddata(panel);
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int r;
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r = regulator_bulk_disable(ARRAY_SIZE(ddata->supplies), ddata->supplies);
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if (r)
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dev_err(&ddata->dsi->dev, "failed to disable supplies: %d\n", r);
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return r;
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}
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static int dsicm_disable(struct drm_panel *panel)
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{
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struct panel_drv_data *ddata = panel_to_ddata(panel);
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int r;
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dsicm_bl_power(ddata, false);
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mutex_lock(&ddata->lock);
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r = dsicm_power_off(ddata);
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mutex_unlock(&ddata->lock);
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return r;
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}
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static int dsicm_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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struct panel_drv_data *ddata = panel_to_ddata(panel);
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struct drm_display_mode *mode;
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mode = drm_mode_duplicate(connector->dev, &ddata->mode);
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if (!mode) {
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dev_err(&ddata->dsi->dev, "failed to add mode %ux%ux@%u kHz\n",
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ddata->mode.hdisplay, ddata->mode.vdisplay,
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ddata->mode.clock);
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return -ENOMEM;
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}
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connector->display_info.width_mm = ddata->panel_data->width_mm;
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connector->display_info.height_mm = ddata->panel_data->height_mm;
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drm_mode_probed_add(connector, mode);
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return 1;
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}
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static const struct drm_panel_funcs dsicm_panel_funcs = {
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.unprepare = dsicm_unprepare,
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.disable = dsicm_disable,
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.prepare = dsicm_prepare,
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.enable = dsicm_enable,
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.get_modes = dsicm_get_modes,
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};
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static int dsicm_probe_of(struct mipi_dsi_device *dsi)
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{
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struct backlight_device *backlight;
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struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
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int err;
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struct drm_display_mode *mode = &ddata->mode;
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ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(ddata->reset_gpio)) {
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err = PTR_ERR(ddata->reset_gpio);
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dev_err(&dsi->dev, "reset gpio request failed: %d", err);
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return err;
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}
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mode->hdisplay = mode->hsync_start = mode->hsync_end = mode->htotal =
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ddata->panel_data->xres;
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mode->vdisplay = mode->vsync_start = mode->vsync_end = mode->vtotal =
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ddata->panel_data->yres;
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mode->clock = ddata->panel_data->xres * ddata->panel_data->yres *
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ddata->panel_data->refresh / 1000;
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mode->width_mm = ddata->panel_data->width_mm;
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mode->height_mm = ddata->panel_data->height_mm;
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mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
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drm_mode_set_name(mode);
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ddata->supplies[0].supply = "vpnl";
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ddata->supplies[1].supply = "vddi";
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err = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ddata->supplies),
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ddata->supplies);
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if (err)
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return err;
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backlight = devm_of_find_backlight(&dsi->dev);
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if (IS_ERR(backlight))
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return PTR_ERR(backlight);
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/* If no backlight device is found assume native backlight support */
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if (backlight)
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ddata->extbldev = backlight;
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else
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ddata->use_dsi_backlight = true;
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return 0;
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}
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static int dsicm_probe(struct mipi_dsi_device *dsi)
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{
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struct panel_drv_data *ddata;
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struct backlight_device *bldev = NULL;
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struct device *dev = &dsi->dev;
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int r;
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dev_dbg(dev, "probe\n");
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ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
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if (!ddata)
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return -ENOMEM;
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mipi_dsi_set_drvdata(dsi, ddata);
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ddata->dsi = dsi;
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ddata->panel_data = of_device_get_match_data(dev);
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if (!ddata->panel_data)
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return -ENODEV;
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r = dsicm_probe_of(dsi);
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if (r)
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return r;
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mutex_init(&ddata->lock);
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dsicm_hw_reset(ddata);
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drm_panel_init(&ddata->panel, dev, &dsicm_panel_funcs,
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DRM_MODE_CONNECTOR_DSI);
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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_NO_EOT_PACKET;
|
|
dsi->hs_rate = ddata->panel_data->max_hs_rate;
|
|
dsi->lp_rate = ddata->panel_data->max_lp_rate;
|
|
|
|
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 void 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);
|
|
}
|
|
|
|
static const struct dsic_panel_data taal_data = {
|
|
.xres = 864,
|
|
.yres = 480,
|
|
.refresh = 60,
|
|
.width_mm = 0,
|
|
.height_mm = 0,
|
|
.max_hs_rate = 300000000,
|
|
.max_lp_rate = 10000000,
|
|
.te_support = true,
|
|
};
|
|
|
|
static const struct dsic_panel_data himalaya_data = {
|
|
.xres = 480,
|
|
.yres = 864,
|
|
.refresh = 60,
|
|
.width_mm = 49,
|
|
.height_mm = 88,
|
|
.max_hs_rate = 300000000,
|
|
.max_lp_rate = 10000000,
|
|
.te_support = false,
|
|
};
|
|
|
|
static const struct dsic_panel_data droid4_data = {
|
|
.xres = 540,
|
|
.yres = 960,
|
|
.refresh = 60,
|
|
.width_mm = 50,
|
|
.height_mm = 89,
|
|
.max_hs_rate = 300000000,
|
|
.max_lp_rate = 10000000,
|
|
.te_support = false,
|
|
};
|
|
|
|
static const struct of_device_id dsicm_of_match[] = {
|
|
{ .compatible = "tpo,taal", .data = &taal_data },
|
|
{ .compatible = "nokia,himalaya", &himalaya_data },
|
|
{ .compatible = "motorola,droid4-panel", &droid4_data },
|
|
{},
|
|
};
|
|
|
|
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");
|