mirror of
https://github.com/revyos/thead-kernel.git
synced 2026-06-21 09:12:26 +02:00
329 lines
7.2 KiB
C
329 lines
7.2 KiB
C
#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 hx8279_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 jadard_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 hx8279_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 hx8279_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 hx8279_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 hx8279_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, 0);
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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, 1);
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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 hx8279_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 = 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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msleep(120);
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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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pinfo->enabled = true;
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return 0;
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}
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static int hx8279_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 = hx8279_panel_disable,
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.unprepare = hx8279_panel_unprepare,
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.prepare = hx8279_panel_prepare,
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.enable = hx8279_panel_enable,
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.get_modes = hx8279_panel_get_modes,
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};
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static const struct drm_display_mode hx8279_default_mode = {
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.clock = 196500,
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.hdisplay = 1200,
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.hsync_start = 1200 + 96,
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.hsync_end = 1200 + 96 + 128,
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.htotal = 1200 + 96 + 128 + 224,
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.vdisplay = 1920,
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.vsync_start = 1920 + 3,
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.vsync_end = 1920 + 3 + 10,
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.vtotal = 1920 + 3 + 10 + 56,
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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 hx8279_panel_desc hx8279_desc = {
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.display_mode = &hx8279_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 = hx8279_on_cmds,
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// .on_cmds_num = ARRAY_SIZE(hx8279_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,hx8279",
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.data = &hx8279_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 hx8279_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 hx8279_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 hx8279_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 = hx8279_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 hx8279_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 = hx8279_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 = hx8279_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 hx8279_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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hx8279_panel_disable(&pinfo->base);
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hx8279_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-himax8279",
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.of_match_table = panel_of_match,
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},
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.probe = hx8279_panel_probe,
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.remove = hx8279_panel_remove,
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.shutdown = hx8279_panel_shutdown,
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};
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module_mipi_dsi_driver(panel_driver);
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