Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Linus Walleij | 977 | 97.50% | 1 | 11.11% |
Sam Ravnborg | 17 | 1.70% | 3 | 33.33% |
Laurent Pinchart | 5 | 0.50% | 2 | 22.22% |
Rob Herring | 1 | 0.10% | 1 | 11.11% |
Uwe Kleine-König | 1 | 0.10% | 1 | 11.11% |
Colin Ian King | 1 | 0.10% | 1 | 11.11% |
Total | 1002 | 9 |
// SPDX-License-Identifier: GPL-2.0+ /* * MIPI-DSI Samsung s6d16d0 panel driver. This is a 864x480 * AMOLED panel with a command-only DSI interface. */ #include <drm/drm_modes.h> #include <drm/drm_mipi_dsi.h> #include <drm/drm_panel.h> #include <linux/gpio/consumer.h> #include <linux/regulator/consumer.h> #include <linux/delay.h> #include <linux/mod_devicetable.h> #include <linux/module.h> struct s6d16d0 { struct device *dev; struct drm_panel panel; struct regulator *supply; struct gpio_desc *reset_gpio; }; /* * The timings are not very helpful as the display is used in * command mode. */ static const struct drm_display_mode samsung_s6d16d0_mode = { /* HS clock, (htotal*vtotal*vrefresh)/1000 */ .clock = 420160, .hdisplay = 864, .hsync_start = 864 + 154, .hsync_end = 864 + 154 + 16, .htotal = 864 + 154 + 16 + 32, .vdisplay = 480, .vsync_start = 480 + 1, .vsync_end = 480 + 1 + 1, .vtotal = 480 + 1 + 1 + 1, .width_mm = 84, .height_mm = 48, }; static inline struct s6d16d0 *panel_to_s6d16d0(struct drm_panel *panel) { return container_of(panel, struct s6d16d0, panel); } static int s6d16d0_unprepare(struct drm_panel *panel) { struct s6d16d0 *s6 = panel_to_s6d16d0(panel); struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev); int ret; /* Enter sleep mode */ ret = mipi_dsi_dcs_enter_sleep_mode(dsi); if (ret) { dev_err(s6->dev, "failed to enter sleep mode (%d)\n", ret); return ret; } /* Assert RESET */ gpiod_set_value_cansleep(s6->reset_gpio, 1); regulator_disable(s6->supply); return 0; } static int s6d16d0_prepare(struct drm_panel *panel) { struct s6d16d0 *s6 = panel_to_s6d16d0(panel); struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev); int ret; ret = regulator_enable(s6->supply); if (ret) { dev_err(s6->dev, "failed to enable supply (%d)\n", ret); return ret; } /* Assert RESET */ gpiod_set_value_cansleep(s6->reset_gpio, 1); udelay(10); /* De-assert RESET */ gpiod_set_value_cansleep(s6->reset_gpio, 0); msleep(120); /* Enabe tearing mode: send TE (tearing effect) at VBLANK */ ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); if (ret) { dev_err(s6->dev, "failed to enable vblank TE (%d)\n", ret); return ret; } /* Exit sleep mode and power on */ ret = mipi_dsi_dcs_exit_sleep_mode(dsi); if (ret) { dev_err(s6->dev, "failed to exit sleep mode (%d)\n", ret); return ret; } return 0; } static int s6d16d0_enable(struct drm_panel *panel) { struct s6d16d0 *s6 = panel_to_s6d16d0(panel); struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev); int ret; ret = mipi_dsi_dcs_set_display_on(dsi); if (ret) { dev_err(s6->dev, "failed to turn display on (%d)\n", ret); return ret; } return 0; } static int s6d16d0_disable(struct drm_panel *panel) { struct s6d16d0 *s6 = panel_to_s6d16d0(panel); struct mipi_dsi_device *dsi = to_mipi_dsi_device(s6->dev); int ret; ret = mipi_dsi_dcs_set_display_off(dsi); if (ret) { dev_err(s6->dev, "failed to turn display off (%d)\n", ret); return ret; } return 0; } static int s6d16d0_get_modes(struct drm_panel *panel, struct drm_connector *connector) { struct drm_display_mode *mode; mode = drm_mode_duplicate(connector->dev, &samsung_s6d16d0_mode); if (!mode) { dev_err(panel->dev, "bad mode or failed to add mode\n"); return -EINVAL; } drm_mode_set_name(mode); mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; connector->display_info.width_mm = mode->width_mm; connector->display_info.height_mm = mode->height_mm; drm_mode_probed_add(connector, mode); return 1; /* Number of modes */ } static const struct drm_panel_funcs s6d16d0_drm_funcs = { .disable = s6d16d0_disable, .unprepare = s6d16d0_unprepare, .prepare = s6d16d0_prepare, .enable = s6d16d0_enable, .get_modes = s6d16d0_get_modes, }; static int s6d16d0_probe(struct mipi_dsi_device *dsi) { struct device *dev = &dsi->dev; struct s6d16d0 *s6; int ret; s6 = devm_kzalloc(dev, sizeof(struct s6d16d0), GFP_KERNEL); if (!s6) return -ENOMEM; mipi_dsi_set_drvdata(dsi, s6); s6->dev = dev; dsi->lanes = 2; dsi->format = MIPI_DSI_FMT_RGB888; dsi->hs_rate = 420160000; dsi->lp_rate = 19200000; /* * This display uses command mode so no MIPI_DSI_MODE_VIDEO * or MIPI_DSI_MODE_VIDEO_SYNC_PULSE * * As we only send commands we do not need to be continuously * clocked. */ dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS; s6->supply = devm_regulator_get(dev, "vdd1"); if (IS_ERR(s6->supply)) return PTR_ERR(s6->supply); /* This asserts RESET by default */ s6->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(s6->reset_gpio)) { ret = PTR_ERR(s6->reset_gpio); if (ret != -EPROBE_DEFER) dev_err(dev, "failed to request GPIO (%d)\n", ret); return ret; } drm_panel_init(&s6->panel, dev, &s6d16d0_drm_funcs, DRM_MODE_CONNECTOR_DSI); drm_panel_add(&s6->panel); ret = mipi_dsi_attach(dsi); if (ret < 0) drm_panel_remove(&s6->panel); return ret; } static void s6d16d0_remove(struct mipi_dsi_device *dsi) { struct s6d16d0 *s6 = mipi_dsi_get_drvdata(dsi); mipi_dsi_detach(dsi); drm_panel_remove(&s6->panel); } static const struct of_device_id s6d16d0_of_match[] = { { .compatible = "samsung,s6d16d0" }, { } }; MODULE_DEVICE_TABLE(of, s6d16d0_of_match); static struct mipi_dsi_driver s6d16d0_driver = { .probe = s6d16d0_probe, .remove = s6d16d0_remove, .driver = { .name = "panel-samsung-s6d16d0", .of_match_table = s6d16d0_of_match, }, }; module_mipi_dsi_driver(s6d16d0_driver); MODULE_AUTHOR("Linus Wallei <linus.walleij@linaro.org>"); MODULE_DESCRIPTION("MIPI-DSI s6d16d0 Panel Driver"); MODULE_LICENSE("GPL v2");
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