mirror of
https://github.com/revyos/thead-kernel.git
synced 2026-08-15 14:36:44 +02:00
430 lines
11 KiB
C
430 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Diiver for panels based on Himax HX8394 controller
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* Copyright (c) 2023, Alibaba-inc Co., Ltd
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*
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*/
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#include <linux/delay.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/gpio/consumer.h>
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#include <linux/regulator/consumer.h>
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#include <drm/drm_device.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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struct hx8394_panel_cmd {
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char cmdlen;
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char cmddata[0x40];
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};
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struct hx8394_panel_desc {
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const struct drm_display_mode *display_mode;
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unsigned long mode_flags;
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enum mipi_dsi_pixel_format format;
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unsigned int lanes;
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const struct hx8394_panel_cmd *on_cmds;
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unsigned int on_cmds_num;
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};
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struct panel_info {
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struct drm_panel base;
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struct mipi_dsi_device *link;
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const struct hx8394_panel_desc *desc;
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struct gpio_desc *reset;
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struct regulator *hsvcc;
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struct regulator *vspn3v3;
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bool prepared;
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bool enabled;
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};
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static inline struct panel_info *to_panel_info(struct drm_panel *panel)
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{
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return container_of(panel, struct panel_info, base);
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}
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static int hx8394_send_mipi_cmds(struct drm_panel *panel, const struct hx8394_panel_cmd *cmds)
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{
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struct panel_info *pinfo = to_panel_info(panel);
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unsigned int i = 0;
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int err;
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for (i = 0; i < pinfo->desc->on_cmds_num; i++) {
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err = mipi_dsi_dcs_write_buffer(pinfo->link, &(cmds[i].cmddata[0]), cmds[i].cmdlen);
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if (err < 0)
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return err;
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}
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return 0;
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}
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static int hx8394_panel_disable(struct drm_panel *panel)
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{
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struct panel_info *pinfo = to_panel_info(panel);
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int err;
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if (!pinfo->enabled)
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return 0;
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err = mipi_dsi_dcs_set_display_off(pinfo->link);
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if (err < 0) {
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dev_err(panel->dev, "failed to set display off: %d\n", err);
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return err;
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}
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pinfo->enabled = false;
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return 0;
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}
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static int hx8394_panel_unprepare(struct drm_panel *panel)
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{
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struct panel_info *pinfo = to_panel_info(panel);
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int err;
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if (!pinfo->prepared)
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return 0;
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err = mipi_dsi_dcs_set_display_off(pinfo->link);
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if (err < 0)
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dev_err(panel->dev, "failed to set display off: %d\n", err);
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err = mipi_dsi_dcs_enter_sleep_mode(pinfo->link);
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if (err < 0)
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dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
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/* sleep_mode_delay: 1ms - 2ms */
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usleep_range(1000, 2000);
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gpiod_set_value(pinfo->reset, 1);
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regulator_disable(pinfo->hsvcc);
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regulator_disable(pinfo->vspn3v3);
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pinfo->prepared = false;
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return 0;
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}
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static int hx8394_panel_prepare(struct drm_panel *panel)
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{
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struct panel_info *pinfo = to_panel_info(panel);
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int ret;
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if (pinfo->prepared)
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return 0;
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gpiod_set_value(pinfo->reset, 1);
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/* Power the panel */
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ret = regulator_enable(pinfo->hsvcc);
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if (ret) {
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dev_err(pinfo->base.dev, "Failed to enable hsvcc supply: %d\n", ret);
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return ret;
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}
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usleep_range(1000, 2000);
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ret = regulator_enable(pinfo->vspn3v3);
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if (ret) {
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dev_err(pinfo->base.dev, "Failed to enable vspn3v3 supply: %d\n", ret);
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goto fail;
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}
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usleep_range(5000, 6000);
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gpiod_set_value(pinfo->reset, 0);
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msleep(180);
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pinfo->prepared = true;
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return 0;
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fail:
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gpiod_set_value(pinfo->reset, 1);
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regulator_disable(pinfo->hsvcc);
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return ret;
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}
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static int hx8394_read_id(struct mipi_dsi_device *dsi, u8 *id1)
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{
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int ret;
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ret = mipi_dsi_dcs_read(dsi, 0xDA, id1, 1);
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if (ret < 0) {
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dev_err(&dsi->dev, "could not read ID1\n");
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return ret;
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}
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dev_info(&dsi->dev, "ID1 : 0x%02x\n", *id1);
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return 0;
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}
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static int hx8394_panel_enable(struct drm_panel *panel)
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{
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struct panel_info *pinfo = to_panel_info(panel);
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int ret;
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u8 id1;
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if (pinfo->enabled)
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return 0;
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ret = hx8394_read_id(pinfo->link, &id1);
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if (ret < 0)
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dev_info(panel->dev, "No LCD connected,pls check your hardware! ret:%d\n", ret);
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/* send init code */
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ret = hx8394_send_mipi_cmds(panel, pinfo->desc->on_cmds);
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if (ret < 0) {
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dev_err(panel->dev, "failed to send DCS Init Code: %d\n", ret);
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return ret;
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}
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ret = mipi_dsi_dcs_exit_sleep_mode(pinfo->link);
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if (ret < 0) {
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dev_err(panel->dev, "failed to exit sleep mode: %d\n", ret);
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return ret;
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}
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msleep(120);
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ret = mipi_dsi_dcs_set_display_on(pinfo->link);
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if (ret < 0) {
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dev_err(panel->dev, "failed to set display on: %d\n", ret);
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return ret;
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}
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pinfo->enabled = true;
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return 0;
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}
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static int hx8394_panel_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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struct panel_info *pinfo = to_panel_info(panel);
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const struct drm_display_mode *m = pinfo->desc->display_mode;
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struct drm_display_mode *mode;
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mode = drm_mode_duplicate(connector->dev, m);
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if (!mode) {
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dev_err(pinfo->base.dev, "failed to add mode %ux%u@%u\n",
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m->hdisplay, m->vdisplay, drm_mode_vrefresh(m));
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return -ENOMEM;
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}
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drm_mode_set_name(mode);
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mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
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drm_mode_probed_add(connector, mode);
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connector->display_info.width_mm = mode->width_mm;
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connector->display_info.height_mm = mode->height_mm;
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return 1;
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}
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static const struct drm_panel_funcs panel_funcs = {
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.disable = hx8394_panel_disable,
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.unprepare = hx8394_panel_unprepare,
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.prepare = hx8394_panel_prepare,
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.enable = hx8394_panel_enable,
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.get_modes = hx8394_panel_get_modes,
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};
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static const struct drm_display_mode hx8394_default_mode = {
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.clock = 76000,
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.hdisplay = 720,
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.hsync_start = 720 + 45,
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.hsync_end = 720 + 45 + 8,
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.htotal = 720 + 45 + 8 + 45,
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.vdisplay = 1280,
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.vsync_start = 1280 + 16,
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.vsync_end = 1280 + 16 + 8,
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.vtotal = 1280 + 16 + 8 + 16,
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.width_mm = 62,
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.height_mm = 110,
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.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
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};
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static const struct hx8394_panel_cmd hx8394_on_cmds[] = {
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{ .cmdlen = 4, .cmddata = {0xB9, 0xFF, 0x83, 0x94} },
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{ .cmdlen = 11, .cmddata = {0xB1, 0x48, 0x0A, 0x6A, 0x09, 0x33, 0x54,
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0x71, 0x71, 0x2E, 0x45} },
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{ .cmdlen = 7, .cmddata = {0xBA, 0x63, 0x03, 0x68, 0x6B, 0xB2, 0xC0} },
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{ .cmdlen = 7, .cmddata = {0xB2, 0x00, 0x80, 0x64, 0x0C, 0x06, 0x2F} },
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{ .cmdlen = 22, .cmddata = {0xB4, 0x1C, 0x78, 0x1C, 0x78, 0x1C, 0x78, 0x01,
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0x0C, 0x86, 0x75, 0x00, 0x3F, 0x1C, 0x78, 0x1C,
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0x78, 0x1C, 0x78, 0x01, 0x0C, 0x86} },
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{ .cmdlen = 34, .cmddata = {0xD3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08,
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0x08, 0x32, 0x10, 0x05, 0x00, 0x05, 0x32, 0x13,
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0xC1, 0x00, 0x01, 0x32, 0x10, 0x08, 0x00, 0x00,
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0x37, 0x03, 0x07, 0x07, 0x37, 0x05, 0x05, 0x37,
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0x0C, 0x40} },
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{ .cmdlen = 45, .cmddata = {0xD5, 0x18, 0x18, 0x18, 0x18, 0x22, 0x23, 0x20,
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0x21, 0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02,
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0x03, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
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0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
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0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
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0x18, 0x19, 0x19, 0x19, 0x19} },
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{ .cmdlen = 45, .cmddata = {0xD6, 0x18, 0x18, 0x19, 0x19, 0x21, 0x20, 0x23,
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0x22, 0x03, 0x02, 0x01, 0x00, 0x07, 0x06, 0x05,
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0x04, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
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0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
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0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
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0x18, 0x19, 0x19, 0x18, 0x18} },
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{ .cmdlen = 59, .cmddata = {0xE0, 0x07, 0x08, 0x09, 0x0D, 0x10, 0x14, 0x16,
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0x13, 0x24, 0x36, 0x48, 0x4A, 0x58, 0x6F, 0x76,
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0x80, 0x97, 0xA5, 0xA8, 0xB5, 0xC6, 0x62, 0x63,
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0x68, 0x6F, 0x72, 0x78, 0x7F, 0x7F, 0x00, 0x02,
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0x08, 0x0D, 0x0C, 0x0E, 0x0F, 0x10, 0x24, 0x36,
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0x48, 0x4A, 0x58, 0x6F, 0x78, 0x82, 0x99, 0xA4,
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0xA0, 0xB1, 0xC0, 0x5E, 0x5E, 0x64, 0x6B, 0x6C,
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0x73, 0x7F, 0x7F} },
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{ .cmdlen = 2, .cmddata = {0xCC, 0x03} },
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{ .cmdlen = 3, .cmddata = {0xC0, 0x1F, 0x73} },
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{ .cmdlen = 3, .cmddata = {0xB6, 0x90, 0x90} },
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{ .cmdlen = 2, .cmddata = {0xD4, 0x02} },
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{ .cmdlen = 2, .cmddata = {0xBD, 0x01} },
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{ .cmdlen = 2, .cmddata = {0xB1, 0x00} },
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{ .cmdlen = 2, .cmddata = {0xBD, 0x00} },
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{ .cmdlen = 8, .cmddata = {0xBF, 0x40, 0x81, 0x50, 0x00, 0x1A, 0xFC, 0x01} },
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{ .cmdlen = 2, .cmddata = {0x36, 0x02} },
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};
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static const struct hx8394_panel_desc hx8394_desc = {
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.display_mode = &hx8394_default_mode,
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.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_VIDEO_BURST,
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.format = MIPI_DSI_FMT_RGB888,
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.lanes = 4,
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.on_cmds = hx8394_on_cmds,
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.on_cmds_num = ARRAY_SIZE(hx8394_on_cmds),
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};
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static const struct of_device_id panel_of_match[] = {
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{
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.compatible = "himax,hx8394",
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.data = &hx8394_desc,
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},
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{
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/* sentinel */
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}
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};
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MODULE_DEVICE_TABLE(of, panel_of_match);
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static int hx8394_panel_add(struct panel_info *pinfo)
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{
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struct device *dev = &pinfo->link->dev;
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int ret;
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pinfo->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(pinfo->reset))
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return dev_err_probe(dev, PTR_ERR(pinfo->reset),
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"Couldn't get our reset GPIO\n");
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pinfo->hsvcc = devm_regulator_get(dev, "hsvcc");
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if (IS_ERR(pinfo->hsvcc))
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return dev_err_probe(dev, PTR_ERR(pinfo->hsvcc),
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"Failed to request hsvcc regulator\n");
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pinfo->vspn3v3 = devm_regulator_get(dev, "vspn3v3");
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if (IS_ERR(pinfo->vspn3v3))
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return dev_err_probe(dev, PTR_ERR(pinfo->vspn3v3),
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"Failed to request vspn3v3 regulator\n");
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drm_panel_init(&pinfo->base, dev, &panel_funcs,
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DRM_MODE_CONNECTOR_DSI);
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ret = drm_panel_of_backlight(&pinfo->base);
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if (ret)
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return ret;
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drm_panel_add(&pinfo->base);
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return 0;
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}
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static int hx8394_panel_probe(struct mipi_dsi_device *dsi)
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{
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struct panel_info *pinfo;
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const struct hx8394_panel_desc *desc;
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int err;
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pinfo = devm_kzalloc(&dsi->dev, sizeof(*pinfo), GFP_KERNEL);
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if (!pinfo)
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return -ENOMEM;
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desc = of_device_get_match_data(&dsi->dev);
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dsi->mode_flags = desc->mode_flags;
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dsi->format = desc->format;
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dsi->lanes = desc->lanes;
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pinfo->desc = desc;
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pinfo->link = dsi;
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mipi_dsi_set_drvdata(dsi, pinfo);
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err = hx8394_panel_add(pinfo);
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if (err < 0)
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return err;
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err = mipi_dsi_attach(dsi);
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if (err < 0)
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drm_panel_remove(&pinfo->base);
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return err;
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}
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static int hx8394_panel_remove(struct mipi_dsi_device *dsi)
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{
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struct panel_info *pinfo = mipi_dsi_get_drvdata(dsi);
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int err;
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err = hx8394_panel_disable(&pinfo->base);
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if (err < 0)
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dev_err(&dsi->dev, "failed to disable panel: %d\n", err);
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err = hx8394_panel_unprepare(&pinfo->base);
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if (err < 0)
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dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err);
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err = mipi_dsi_detach(dsi);
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if (err < 0)
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dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
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drm_panel_remove(&pinfo->base);
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return 0;
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}
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static void hx8394_panel_shutdown(struct mipi_dsi_device *dsi)
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{
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struct panel_info *pinfo = mipi_dsi_get_drvdata(dsi);
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hx8394_panel_disable(&pinfo->base);
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hx8394_panel_unprepare(&pinfo->base);
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}
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static struct mipi_dsi_driver panel_driver = {
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.driver = {
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.name = "panel-himax8394",
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.of_match_table = panel_of_match,
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},
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.probe = hx8394_panel_probe,
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.remove = hx8394_panel_remove,
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.shutdown = hx8394_panel_shutdown,
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};
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module_mipi_dsi_driver(panel_driver);
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MODULE_DESCRIPTION("Himax8394 driver");
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MODULE_LICENSE("GPL v2");
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