Add support for the JDI lt070me05000 WUXGA DSI panel used in Nexus 7 2013 devices.

Programming sequence for the panel is was originally found in the android-msm-flo-3.4-lollipop-release branch from: https://android.googlesource.com/kernel/msm.git

And video mode setting is from dsi-panel-jdi-dualmipi1-video.dtsi file in: git://codeaurora.org/kernel/msm-3.10.git LNX.LA.3.6_rb1.27

Other fixes folded in were provided by Archit Taneja archit.taneja@gmail.com

Cc: Archit Taneja archit.taneja@gmail.com [sumit.semwal: Ported to the drm/panel framework] Signed-off-by: Sumit Semwal sumit.semwal@linaro.org [jstultz: Cherry-picked to mainline, folded down other fixes from Vinay and Archit] Signed-off-by: John Stultz john.stultz@linaro.org [vinay simha bn: removed interface setting cmd mode, video mode panel setting selection] Cc: Rob Clark robdclark@gmail.com Signed-off-by: Vinay Simha BN simhavcs@gmail.com -- v2: * incorporated code reviews from theiry, archit code style, alphabetical soring in Makefile, Kconfig, regulator_bulk, arrays of u8, generic helper function, documentation bindings,

v3: * dcs backlight support added * tested this panel driver in nexus7 2013 device --- drivers/gpu/drm/panel/Kconfig | 11 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-jdi-lt070me05000.c | 479 +++++++++++++++++++++++++ 3 files changed, 491 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-jdi-lt070me05000.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 1500ab9..83e89e7 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -7,6 +7,17 @@ config DRM_PANEL menu "Display Panels" depends on DRM && DRM_PANEL

+config DRM_PANEL_JDI_LT070ME05000 + tristate "JDI LT070ME05000 WUXGA DSI panel" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + help + Say Y here if you want to enable support for JDI WUXGA DSI video + mode panel as found in Google Nexus 7 (2013) devices. + The panel has a 1200(RGB)×1920 (WUXGA) resolution and uses + 24 bit RGB per pixel. + config DRM_PANEL_SIMPLE tristate "support for simple panels" depends on OF diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index f277eed..5d74ac2 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -1,3 +1,4 @@ +obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c new file mode 100644 index 0000000..44a1aff2f --- /dev/null +++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c @@ -0,0 +1,479 @@ +/* + * Copyright (C) 2016 InforceComputing + * Author: Vinay Simha BN simhavcs@gmail.com + * + * Copyright (C) 2016 Linaro Ltd + * Author: Sumit Semwal sumit.semwal@linaro.org + * + * From internet archives, the panel for Nexus 7 2nd Gen, 2013 model is a + * JDI model LT070ME05000, and its data sheet is at: + * http://panelone.net/en/7-0-inch/JDI_LT070ME05000_7.0_inch-datasheet + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see http://www.gnu.org/licenses/. + */ + +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regulator/consumer.h> + +#include <drm/drmP.h> +#include <drm/drm_crtc.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_panel.h> + +#include <video/mipi_display.h> + +#define PANEL_DEV_REGULATOR_MAX 3 +#define PANEL_MAX_BRIGHTNESS 0xFF + +const char *regs[] = { + "vddp", + "dcdc_en", + "vcc" +}; + +struct jdi_panel { + struct drm_panel base; + struct mipi_dsi_device *dsi; + + struct regulator_bulk_data supplies[PANEL_DEV_REGULATOR_MAX]; + + struct gpio_desc *reset_gpio; + struct gpio_desc *enable_gpio; + struct backlight_device *backlight; + + bool prepared; + bool enabled; + + const struct drm_display_mode *mode; +}; + +static inline struct jdi_panel *to_jdi_panel(struct drm_panel *panel) +{ + return container_of(panel, struct jdi_panel, base); +} + +static int jdi_panel_init(struct jdi_panel *jdi) +{ + struct mipi_dsi_device *dsi = jdi->dsi; + int ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_soft_reset(dsi); + if (ret < 0) + return ret; + + usleep_range(10000, 20000); + + ret = mipi_dsi_dcs_set_pixel_format(dsi, 0x70); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_set_column_address(dsi, 0x0000, 0x04AF); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_set_page_address(dsi, 0x0000, 0x077F); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_set_tear_on(dsi, + MIPI_DSI_DCS_TEAR_MODE_VBLANK); + if (ret < 0) + return ret; + usleep_range(5000, 10000); + + ret = mipi_dsi_set_tear_scanline(dsi, 0x03, 0x00); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, + (u8[]){ 0xFF }, 1); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, + (u8[]){ 0x24 }, 1); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_POWER_SAVE, + (u8[]){ 0x00 }, 1); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); + if (ret < 0) + return ret; + mdelay(120); + + ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x00}, 2); + if (ret < 0) + return ret; + mdelay(10); + + ret = mipi_dsi_generic_write(dsi, (u8[]) + {0xB3, 0x26, 0x08, 0x00, 0x20, 0x00}, 6); + if (ret < 0) + return ret; + mdelay(20); + + ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x03}, 2); + if (ret < 0) + return ret; + + return 0; +} + +static int jdi_panel_on(struct jdi_panel *jdi) +{ + struct mipi_dsi_device *dsi = jdi->dsi; + int ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_set_display_on(dsi); + if (ret < 0) + return ret; + + return 0; +} + +static int jdi_panel_off(struct jdi_panel *jdi) +{ + struct mipi_dsi_device *dsi = jdi->dsi; + int ret; + + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_set_display_off(dsi); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_enter_sleep_mode(dsi); + if (ret < 0) + return ret; + + ret = mipi_dsi_dcs_set_tear_off(dsi); + if (ret < 0) + return ret; + + msleep(100); + + return 0; +} + +static int jdi_panel_disable(struct drm_panel *panel) +{ + struct jdi_panel *jdi = to_jdi_panel(panel); + + if (!jdi->enabled) + return 0; + + DRM_DEBUG("disable\n"); + + if (jdi->backlight) { + jdi->backlight->props.power = FB_BLANK_POWERDOWN; + backlight_update_status(jdi->backlight); + } + + jdi->enabled = false; + + return 0; +} + +static int jdi_panel_unprepare(struct drm_panel *panel) +{ + struct jdi_panel *jdi = to_jdi_panel(panel); + struct regulator_bulk_data *s = jdi->supplies; + int num = PANEL_DEV_REGULATOR_MAX; + struct device *dev = &jdi->dsi->dev; + int ret; + + if (!jdi->prepared) + return 0; + + DRM_DEBUG("unprepare\n"); + + ret = jdi_panel_off(jdi); + if (ret) { + dev_err(panel->dev, "failed to set panel off: %d\n", ret); + return ret; + } + + ret = regulator_bulk_disable(num, s); + if (ret < 0) { + dev_err(dev, "regulator disable failed, %d\n", ret); + return ret; + } + + if (jdi->reset_gpio) + gpiod_set_value(jdi->reset_gpio, 0); + + if (jdi->enable_gpio) + gpiod_set_value(jdi->enable_gpio, 0); + + jdi->prepared = false; + + return 0; +} + +static int jdi_panel_prepare(struct drm_panel *panel) +{ + struct jdi_panel *jdi = to_jdi_panel(panel); + struct regulator_bulk_data *s = jdi->supplies; + int num = PANEL_DEV_REGULATOR_MAX; + struct device *dev = &jdi->dsi->dev; + int ret; + + if (jdi->prepared) + return 0; + + DRM_DEBUG("prepare\n"); + + ret = regulator_bulk_enable(num, s); + if (ret < 0) { + dev_err(dev, "regulator enable failed, %d\n", ret); + return ret; + } + + msleep(20); + + if (jdi->reset_gpio) { + gpiod_set_value(jdi->reset_gpio, 1); + usleep_range(10, 20); + } + + if (jdi->enable_gpio) { + gpiod_set_value(jdi->enable_gpio, 1); + usleep_range(10, 20); + } + + ret = jdi_panel_init(jdi); + if (ret) { + dev_err(panel->dev, "failed to init panel: %d\n", ret); + goto poweroff; + } + + ret = jdi_panel_on(jdi); + if (ret) { + dev_err(panel->dev, "failed to set panel on: %d\n", ret); + goto poweroff; + } + + jdi->prepared = true; + + return 0; + +poweroff: + if (jdi->reset_gpio) + gpiod_set_value(jdi->reset_gpio, 0); + if (jdi->enable_gpio) + gpiod_set_value(jdi->enable_gpio, 0); + + return ret; +} + +static int jdi_panel_enable(struct drm_panel *panel) +{ + struct jdi_panel *jdi = to_jdi_panel(panel); + + if (jdi->enabled) + return 0; + + DRM_DEBUG("enable\n"); + + if (jdi->backlight) { + jdi->backlight->props.power = FB_BLANK_UNBLANK; + backlight_update_status(jdi->backlight); + } + + jdi->enabled = true; + + return 0; +} + +static const struct drm_display_mode default_mode = { + .clock = 155493, + .hdisplay = 1200, + .hsync_start = 1200 + 48, + .hsync_end = 1200 + 48 + 32, + .htotal = 1200 + 48 + 32 + 60, + .vdisplay = 1920, + .vsync_start = 1920 + 3, + .vsync_end = 1920 + 3 + 5, + .vtotal = 1920 + 3 + 5 + 6, + .vrefresh = 60, + .flags = 0, +}; + +static int jdi_panel_get_modes(struct drm_panel *panel) +{ + struct drm_display_mode *mode; + struct jdi_panel *jdi = to_jdi_panel(panel); + struct device *dev = &jdi->dsi->dev; + + mode = drm_mode_duplicate(panel->drm, &default_mode); + if (!mode) { + dev_err(dev, "failed to add mode %ux%ux@%u\n", + default_mode.hdisplay, default_mode.vdisplay, + default_mode.vrefresh); + return -ENOMEM; + } + + drm_mode_set_name(mode); + + drm_mode_probed_add(panel->connector, mode); + + return 1; +} + +static const struct drm_panel_funcs jdi_panel_funcs = { + .disable = jdi_panel_disable, + .unprepare = jdi_panel_unprepare, + .prepare = jdi_panel_prepare, + .enable = jdi_panel_enable, + .get_modes = jdi_panel_get_modes, +}; + +static const struct of_device_id jdi_of_match[] = { + { .compatible = "jdi,lt070me05000", }, + { } +}; +MODULE_DEVICE_TABLE(of, jdi_of_match); + +static int jdi_panel_add(struct jdi_panel *jdi) +{ + struct device *dev = &jdi->dsi->dev; + struct regulator_bulk_data *s = jdi->supplies; + int num = PANEL_DEV_REGULATOR_MAX; + int i, ret; + + jdi->mode = &default_mode; + + for (i = 0; i < num; i++) + s[i].supply = regs[i]; + + ret = devm_regulator_bulk_get(dev, num, s); + if (ret < 0) { + dev_err(dev, "%s: failed to init regulator, ret=%d\n", + __func__, ret); + return ret; + } + + jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(jdi->reset_gpio)) { + dev_err(dev, "cannot get reset-gpios %ld\n", + PTR_ERR(jdi->reset_gpio)); + jdi->reset_gpio = NULL; + } else { + gpiod_direction_output(jdi->reset_gpio, 0); + } + + jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW); + if (IS_ERR(jdi->enable_gpio)) { + dev_err(dev, "cannot get enable-gpio %ld\n", + PTR_ERR(jdi->enable_gpio)); + jdi->enable_gpio = NULL; + } else { + gpiod_direction_output(jdi->enable_gpio, 0); + } + + jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi); + + drm_panel_init(&jdi->base); + jdi->base.funcs = &jdi_panel_funcs; + jdi->base.dev = &jdi->dsi->dev; + + ret = drm_panel_add(&jdi->base); + if (ret < 0) + return ret; + + return 0; +} + +static void jdi_panel_del(struct jdi_panel *jdi) +{ + if (jdi->base.dev) + drm_panel_remove(&jdi->base); +} + +static int jdi_panel_probe(struct mipi_dsi_device *dsi) +{ + struct jdi_panel *jdi; + int ret; + + dsi->lanes = 4; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO | + MIPI_DSI_CLOCK_NON_CONTINUOUS; + + jdi = devm_kzalloc(&dsi->dev, sizeof(*jdi), GFP_KERNEL); + if (!jdi) + return -ENOMEM; + + mipi_dsi_set_drvdata(dsi, jdi); + + jdi->dsi = dsi; + + ret = jdi_panel_add(jdi); + if (ret < 0) + return ret; + + return mipi_dsi_attach(dsi); +} + +static int jdi_panel_remove(struct mipi_dsi_device *dsi) +{ + struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi); + int ret; + + ret = jdi_panel_disable(&jdi->base); + if (ret < 0) + dev_err(&dsi->dev, "failed to disable panel: %d\n", ret); + + ret = mipi_dsi_detach(dsi); + if (ret < 0) + dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", + ret); + + drm_panel_detach(&jdi->base); + jdi_panel_del(jdi); + + return 0; +} + +static void jdi_panel_shutdown(struct mipi_dsi_device *dsi) +{ + struct jdi_panel *jdi = mipi_dsi_get_drvdata(dsi); + + jdi_panel_disable(&jdi->base); +} + +static struct mipi_dsi_driver jdi_panel_driver = { + .driver = { + .name = "panel-jdi-lt070me05000", + .of_match_table = jdi_of_match, + }, + .probe = jdi_panel_probe, + .remove = jdi_panel_remove, + .shutdown = jdi_panel_shutdown, +}; +module_mipi_dsi_driver(jdi_panel_driver); + +MODULE_AUTHOR("Sumit Semwal sumit.semwal@linaro.org"); +MODULE_AUTHOR("Vinay Simha BN simhavcs@gmail.com"); +MODULE_DESCRIPTION("JDI WUXGA LT070ME05000 DSI video mode panel driver"); +MODULE_LICENSE("GPL v2");