Some Poco F1 phones have an LCD panel from Tianma, model nt36672a, with a resolution of 1080x2246 that operates in DSI video mode.

Add the drm panel driver for it.

During testing, Benni Steini bennisteinir@gmail.com helped us fix the reset sequence timing (from 10ms to 20ms), to get the bootanimation to work on Android.

With current AOSP, we need to increase it to 200ms - this seems to be a safe high value to avoid a white screen occassionally.

Signed-off-by: Sumit Semwal sumit.semwal@linaro.org Cc: Benni Steini bennisteinir@gmail.com Change-Id: Ib822ef12464abcb50d2e539d11b8983be87c31f2

--- v2: increase reset sequence timing to a safe 200ms --- MAINTAINERS | 7 + drivers/gpu/drm/panel/Kconfig | 11 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-tianma-nt36672a.c | 859 ++++++++++++++++++ 4 files changed, 878 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-tianma-nt36672a.c

diff --git a/MAINTAINERS b/MAINTAINERS index b4a43a9e7fbc..2d384e51353b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5544,6 +5544,13 @@ T: git git://anongit.freedesktop.org/drm/drm-misc F: Documentation/devicetree/bindings/display/ste,mcde.txt F: drivers/gpu/drm/mcde/

+DRM DRIVER FOR TIANMA NT36672A PANELS +M: Sumit Semwal sumit.semwal@linaro.org +S: Maintained +T: git git://anongit.freedesktop.org/drm/drm-misc +F: Documentation/devicetree/bindings/display/panel/tianma,nt36672a-panel.yaml +F: drivers/gpu/drm/panel/panel-tianma-nt36672a.c + DRM DRIVER FOR TDFX VIDEO CARDS S: Orphan / Obsolete F: drivers/gpu/drm/tdfx/ diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 39055c1f0e2f..da9d74c1ec91 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -437,6 +437,17 @@ config DRM_PANEL_TPO_TD043MTEA1 Say Y here if you want to enable support for TPO TD043MTEA1 800x480 4.3" panel (found on the OMAP3 Pandora board).

+config DRM_PANEL_TIANMA_FHD_NT36672A + tristate "TIANMA NT36672A 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 the Tianma NT36672A + panel. It is seen mostly in Xiaomi Poco F1 mobile phone. + The panel has a 1080x2246 resolution and uses 24 bit RGB per pixel. + It provides a MIPI DSI interface to the host. + config DRM_PANEL_TPO_TPG110 tristate "TPO TPG 800x400 panel" depends on OF && SPI && GPIOLIB diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index de74f282c433..303e44eb50fa 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -44,6 +44,7 @@ obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7701) += panel-sitronix-st7701.o obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o obj-$(CONFIG_DRM_PANEL_SONY_ACX424AKP) += panel-sony-acx424akp.o obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o +obj-$(CONFIG_DRM_PANEL_TIANMA_FHD_NT36672A) += panel-tianma-nt36672a.o obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o obj-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o diff --git a/drivers/gpu/drm/panel/panel-tianma-nt36672a.c b/drivers/gpu/drm/panel/panel-tianma-nt36672a.c new file mode 100644 index 000000000000..0af3a6ff5d55 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-tianma-nt36672a.c @@ -0,0 +1,859 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2020 Linaro Ltd + * Author: Sumit Semwal sumit.semwal@linaro.org + */ + +#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> + +#include <linux/gpio/consumer.h> +#include <linux/pinctrl/consumer.h> +#include <linux/regulator/consumer.h> + +#include <drm/drm_device.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> +#include <drm/drm_print.h> + +#include <video/mipi_display.h> + +struct panel_cmd { + size_t len; + const char *data; +}; + +#define _INIT_CMD(...) { \ + .len = sizeof((char[]){__VA_ARGS__}), \ + .data = (char[]){__VA_ARGS__} } + +static const char * const regulator_names[] = { + "vddio", + "vddpos", + "vddneg", +}; + +static unsigned long const regulator_enable_loads[] = { + 62000, + 100000, + 100000 +}; + +static unsigned long const regulator_disable_loads[] = { + 80, + 100, + 100 +}; + +struct panel_desc { + const struct drm_display_mode *display_mode; + const char *panel_name; + + unsigned int width_mm; + unsigned int height_mm; + + unsigned long mode_flags; + enum mipi_dsi_pixel_format format; + unsigned int lanes; + + const struct panel_cmd *on_cmds_1; + const struct panel_cmd *on_cmds_2; + + const struct panel_cmd *off_cmds; +}; + +struct panel_info { + struct drm_panel base; + struct mipi_dsi_device *link; + const struct panel_desc *desc; + + struct regulator_bulk_data supplies[ARRAY_SIZE(regulator_names)]; + + struct gpio_desc *reset_gpio; + + struct pinctrl *pinctrl; + struct pinctrl_state *active; + struct pinctrl_state *suspend; + + + bool prepared; + bool enabled; +}; + +static inline struct panel_info *to_panel_info(struct drm_panel *panel) +{ + return container_of(panel, struct panel_info, base); +} + +static int send_mipi_cmds(struct drm_panel *panel, const struct panel_cmd *cmds) +{ + struct panel_info *pinfo = to_panel_info(panel); + unsigned int i = 0; + int err; + + if (!cmds) + return -EFAULT; + + for (i = 0; cmds[i].len != 0; i++) { + const struct panel_cmd *cmd = &cmds[i]; + + if (cmd->len == 2) + err = mipi_dsi_dcs_write(pinfo->link, + cmd->data[1], NULL, 0); + else + err = mipi_dsi_dcs_write(pinfo->link, + cmd->data[1], cmd->data + 2, + cmd->len - 2); + + if (err < 0) + return err; + + } + + return 0; +} + +static int panel_set_pinctrl_state(struct panel_info *panel, bool enable) +{ + int rc = 0; + struct pinctrl_state *state; + + if (enable) + state = panel->active; + else + state = panel->suspend; + + rc = pinctrl_select_state(panel->pinctrl, state); + if (rc) + pr_err("[%s] failed to set pin state, rc=%d\n", panel->desc->panel_name, + rc); + return rc; +} + +static int tianma_panel_disable(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + + pinfo->enabled = false; + + return 0; +} + +static int tianma_panel_power_off(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + int i, ret = 0; + + gpiod_set_value(pinfo->reset_gpio, 0); + + ret = panel_set_pinctrl_state(pinfo, false); + if (ret) { + pr_err("[%s] failed to set pinctrl, rc=%d\n", pinfo->desc->panel_name, ret); + return ret; + } + + for (i = 0; i < ARRAY_SIZE(pinfo->supplies); i++) { + ret = regulator_set_load(pinfo->supplies[i].consumer, + regulator_disable_loads[i]); + if (ret) { + DRM_DEV_ERROR(panel->dev, + "regulator_set_load failed %d\n", ret); + return ret; + } + } + + ret = regulator_bulk_disable(ARRAY_SIZE(pinfo->supplies), pinfo->supplies); + if (ret) { + DRM_DEV_ERROR(panel->dev, + "regulator_bulk_disable failed %d\n", ret); + } + return ret; +} + +static int tianma_panel_unprepare(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + int ret; + + if (!pinfo->prepared) + return 0; + + /* send off cmds */ + ret = send_mipi_cmds(panel, pinfo->desc->off_cmds); + + if (ret < 0) { + DRM_DEV_ERROR(panel->dev, + "failed to send DCS off cmds: %d\n", ret); + } + + ret = mipi_dsi_dcs_set_display_off(pinfo->link); + if (ret < 0) { + DRM_DEV_ERROR(panel->dev, + "set_display_off cmd failed ret = %d\n", + ret); + } + + /* 120ms delay required here as per DCS spec */ + msleep(120); + + ret = mipi_dsi_dcs_enter_sleep_mode(pinfo->link); + if (ret < 0) { + DRM_DEV_ERROR(panel->dev, + "enter_sleep cmd failed ret = %d\n", ret); + } + /* 0x3C = 60ms delay */ + msleep(60); + + ret = tianma_panel_power_off(panel); + if (ret < 0) + DRM_DEV_ERROR(panel->dev, "power_off failed ret = %d\n", ret); + + pinfo->prepared = false; + + return ret; + +} + +static int tianma_panel_power_on(struct panel_info *pinfo) +{ + int ret, i; + + for (i = 0; i < ARRAY_SIZE(pinfo->supplies); i++) { + ret = regulator_set_load(pinfo->supplies[i].consumer, + regulator_enable_loads[i]); + if (ret) + return ret; + } + + ret = regulator_bulk_enable(ARRAY_SIZE(pinfo->supplies), pinfo->supplies); + if (ret < 0) + return ret; + + ret = panel_set_pinctrl_state(pinfo, true); + if (ret) { + pr_err("[%s] failed to set pinctrl, rc=%d\n", pinfo->desc->panel_name, ret); + return ret; + } + + /* + * As per downstream kernel, Reset sequence of Tianma nt36672a panel requires the panel to be + * out of reset for 10ms, followed by being held in reset for 10ms. But for Android / AOSP, + * we needed to bump it upto 200ms otherwise we get white screen sometimes. + * FIXME: Try to reduce this 200ms to a lesser value. + */ + gpiod_set_value(pinfo->reset_gpio, 0); + msleep(200); + gpiod_set_value(pinfo->reset_gpio, 1); + msleep(200); + + return 0; +} + +static int tianma_panel_prepare(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + int err; + + if (pinfo->prepared) + return 0; + + err = tianma_panel_power_on(pinfo); + if (err < 0) + goto poweroff; + + /* send first part of init cmds */ + err = send_mipi_cmds(panel, pinfo->desc->on_cmds_1); + + if (err < 0) { + DRM_DEV_ERROR(panel->dev, + "failed to send DCS Init 1st Code: %d\n", err); + goto poweroff; + } + + err = mipi_dsi_dcs_set_display_on(pinfo->link); + if (err < 0) { + DRM_DEV_ERROR(panel->dev, + "failed to Set Display ON: %d\n", err); + goto poweroff; + } + + err = mipi_dsi_dcs_exit_sleep_mode(pinfo->link); + if (err < 0) { + DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n", + err); + goto poweroff; + } + /* 0x46 = 70 ms delay */ + msleep(70); + + /* Send rest of the init cmds */ + err = send_mipi_cmds(panel, pinfo->desc->on_cmds_2); + + if (err < 0) { + DRM_DEV_ERROR(panel->dev, + "failed to send DCS Init 2nd Code: %d\n", err); + goto poweroff; + } + + msleep(120); + + pinfo->prepared = true; + + return 0; + +poweroff: + gpiod_set_value(pinfo->reset_gpio, 1); + return err; +} + + +static int tianma_panel_enable(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + + if (pinfo->enabled) + return 0; + + pinfo->enabled = true; + + return 0; +} + +static int tianma_panel_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + struct panel_info *pinfo = to_panel_info(panel); + const struct drm_display_mode *m = pinfo->desc->display_mode; + struct drm_display_mode *mode; + + mode = drm_mode_duplicate(connector->dev, m); + if (!mode) { + DRM_DEV_ERROR(panel->dev, "failed to add mode %ux%u@%u\n", + m->hdisplay, m->vdisplay, m->vrefresh); + return -ENOMEM; + } + + connector->display_info.width_mm = pinfo->desc->width_mm; + connector->display_info.height_mm = pinfo->desc->height_mm; + + drm_mode_set_name(mode); + drm_mode_probed_add(connector, mode); + + return 1; +} + +static const struct drm_panel_funcs panel_funcs = { + .disable = tianma_panel_disable, + .unprepare = tianma_panel_unprepare, + .prepare = tianma_panel_prepare, + .enable = tianma_panel_enable, + .get_modes = tianma_panel_get_modes, +}; + +static const struct panel_cmd tianma_nt36672a_on_cmds_1[] = { + /* skin enhancement mode */ + _INIT_CMD(0x00, 0xFF, 0x22), + _INIT_CMD(0x00, 0x00, 0x40), + _INIT_CMD(0x00, 0x01, 0xC0), + _INIT_CMD(0x00, 0x02, 0x40), + _INIT_CMD(0x00, 0x03, 0x40), + _INIT_CMD(0x00, 0x04, 0x40), + _INIT_CMD(0x00, 0x05, 0x40), + _INIT_CMD(0x00, 0x06, 0x40), + _INIT_CMD(0x00, 0x07, 0x40), + _INIT_CMD(0x00, 0x08, 0x40), + _INIT_CMD(0x00, 0x09, 0x40), + _INIT_CMD(0x00, 0x0A, 0x40), + _INIT_CMD(0x00, 0x0B, 0x40), + _INIT_CMD(0x00, 0x0C, 0x40), + _INIT_CMD(0x00, 0x0D, 0x40), + _INIT_CMD(0x00, 0x0E, 0x40), + _INIT_CMD(0x00, 0x0F, 0x40), + _INIT_CMD(0x00, 0x10, 0x40), + _INIT_CMD(0x00, 0x11, 0x50), + _INIT_CMD(0x00, 0x12, 0x60), + _INIT_CMD(0x00, 0x13, 0x70), + _INIT_CMD(0x00, 0x14, 0x58), + _INIT_CMD(0x00, 0x15, 0x68), + _INIT_CMD(0x00, 0x16, 0x78), + _INIT_CMD(0x00, 0x17, 0x77), + _INIT_CMD(0x00, 0x18, 0x39), + _INIT_CMD(0x00, 0x19, 0x2D), + _INIT_CMD(0x00, 0x1A, 0x2E), + _INIT_CMD(0x00, 0x1B, 0x32), + _INIT_CMD(0x00, 0x1C, 0x37), + _INIT_CMD(0x00, 0x1D, 0x3A), + _INIT_CMD(0x00, 0x1E, 0x40), + _INIT_CMD(0x00, 0x1F, 0x40), + _INIT_CMD(0x00, 0x20, 0x40), + _INIT_CMD(0x00, 0x21, 0x40), + _INIT_CMD(0x00, 0x22, 0x40), + _INIT_CMD(0x00, 0x23, 0x40), + _INIT_CMD(0x00, 0x24, 0x40), + _INIT_CMD(0x00, 0x25, 0x40), + _INIT_CMD(0x00, 0x26, 0x40), + _INIT_CMD(0x00, 0x27, 0x40), + _INIT_CMD(0x00, 0x28, 0x40), + _INIT_CMD(0x00, 0x2D, 0x00), + _INIT_CMD(0x00, 0x2F, 0x40), + _INIT_CMD(0x00, 0x30, 0x40), + _INIT_CMD(0x00, 0x31, 0x40), + _INIT_CMD(0x00, 0x32, 0x40), + _INIT_CMD(0x00, 0x33, 0x40), + _INIT_CMD(0x00, 0x34, 0x40), + _INIT_CMD(0x00, 0x35, 0x40), + _INIT_CMD(0x00, 0x36, 0x40), + _INIT_CMD(0x00, 0x37, 0x40), + _INIT_CMD(0x00, 0x38, 0x40), + _INIT_CMD(0x00, 0x39, 0x40), + _INIT_CMD(0x00, 0x3A, 0x40), + _INIT_CMD(0x00, 0x3B, 0x40), + _INIT_CMD(0x00, 0x3D, 0x40), + _INIT_CMD(0x00, 0x3F, 0x40), + _INIT_CMD(0x00, 0x40, 0x40), + _INIT_CMD(0x00, 0x41, 0x40), + _INIT_CMD(0x00, 0x42, 0x40), + _INIT_CMD(0x00, 0x43, 0x40), + _INIT_CMD(0x00, 0x44, 0x40), + _INIT_CMD(0x00, 0x45, 0x40), + _INIT_CMD(0x00, 0x46, 0x40), + _INIT_CMD(0x00, 0x47, 0x40), + _INIT_CMD(0x00, 0x48, 0x40), + _INIT_CMD(0x00, 0x49, 0x40), + _INIT_CMD(0x00, 0x4A, 0x40), + _INIT_CMD(0x00, 0x4B, 0x40), + _INIT_CMD(0x00, 0x4C, 0x40), + _INIT_CMD(0x00, 0x4D, 0x40), + _INIT_CMD(0x00, 0x4E, 0x40), + _INIT_CMD(0x00, 0x4F, 0x40), + _INIT_CMD(0x00, 0x50, 0x40), + _INIT_CMD(0x00, 0x51, 0x40), + _INIT_CMD(0x00, 0x52, 0x40), + _INIT_CMD(0x00, 0x53, 0x01), + _INIT_CMD(0x00, 0x54, 0x01), + _INIT_CMD(0x00, 0x55, 0xFE), + _INIT_CMD(0x00, 0x56, 0x77), + _INIT_CMD(0x00, 0x58, 0xCD), + _INIT_CMD(0x00, 0x59, 0xD0), + _INIT_CMD(0x00, 0x5A, 0xD0), + _INIT_CMD(0x00, 0x5B, 0x50), + _INIT_CMD(0x00, 0x5C, 0x50), + _INIT_CMD(0x00, 0x5D, 0x50), + _INIT_CMD(0x00, 0x5E, 0x50), + _INIT_CMD(0x00, 0x5F, 0x50), + _INIT_CMD(0x00, 0x60, 0x50), + _INIT_CMD(0x00, 0x61, 0x50), + _INIT_CMD(0x00, 0x62, 0x50), + _INIT_CMD(0x00, 0x63, 0x50), + _INIT_CMD(0x00, 0x64, 0x50), + _INIT_CMD(0x00, 0x65, 0x50), + _INIT_CMD(0x00, 0x66, 0x50), + _INIT_CMD(0x00, 0x67, 0x50), + _INIT_CMD(0x00, 0x68, 0x50), + _INIT_CMD(0x00, 0x69, 0x50), + _INIT_CMD(0x00, 0x6A, 0x50), + _INIT_CMD(0x00, 0x6B, 0x50), + _INIT_CMD(0x00, 0x6C, 0x50), + _INIT_CMD(0x00, 0x6D, 0x50), + _INIT_CMD(0x00, 0x6E, 0x50), + _INIT_CMD(0x00, 0x6F, 0x50), + _INIT_CMD(0x00, 0x70, 0x07), + _INIT_CMD(0x00, 0x71, 0x00), + _INIT_CMD(0x00, 0x72, 0x00), + _INIT_CMD(0x00, 0x73, 0x00), + _INIT_CMD(0x00, 0x74, 0x06), + _INIT_CMD(0x00, 0x75, 0x0C), + _INIT_CMD(0x00, 0x76, 0x03), + _INIT_CMD(0x00, 0x77, 0x09), + _INIT_CMD(0x00, 0x78, 0x0F), + _INIT_CMD(0x00, 0x79, 0x68), + _INIT_CMD(0x00, 0x7A, 0x88), + _INIT_CMD(0x00, 0x7C, 0x80), + _INIT_CMD(0x00, 0x7D, 0x80), + _INIT_CMD(0x00, 0x7E, 0x80), + _INIT_CMD(0x00, 0x7F, 0x00), + _INIT_CMD(0x00, 0x80, 0x00), + _INIT_CMD(0x00, 0x81, 0x00), + _INIT_CMD(0x00, 0x83, 0x01), + _INIT_CMD(0x00, 0x84, 0x00), + _INIT_CMD(0x00, 0x85, 0x80), + _INIT_CMD(0x00, 0x86, 0x80), + _INIT_CMD(0x00, 0x87, 0x80), + _INIT_CMD(0x00, 0x88, 0x40), + _INIT_CMD(0x00, 0x89, 0x91), + _INIT_CMD(0x00, 0x8A, 0x98), + _INIT_CMD(0x00, 0x8B, 0x80), + _INIT_CMD(0x00, 0x8C, 0x80), + _INIT_CMD(0x00, 0x8D, 0x80), + _INIT_CMD(0x00, 0x8E, 0x80), + _INIT_CMD(0x00, 0x8F, 0x80), + _INIT_CMD(0x00, 0x90, 0x80), + _INIT_CMD(0x00, 0x91, 0x80), + _INIT_CMD(0x00, 0x92, 0x80), + _INIT_CMD(0x00, 0x93, 0x80), + _INIT_CMD(0x00, 0x94, 0x80), + _INIT_CMD(0x00, 0x95, 0x80), + _INIT_CMD(0x00, 0x96, 0x80), + _INIT_CMD(0x00, 0x97, 0x80), + _INIT_CMD(0x00, 0x98, 0x80), + _INIT_CMD(0x00, 0x99, 0x80), + _INIT_CMD(0x00, 0x9A, 0x80), + _INIT_CMD(0x00, 0x9B, 0x80), + _INIT_CMD(0x00, 0x9C, 0x80), + _INIT_CMD(0x00, 0x9D, 0x80), + _INIT_CMD(0x00, 0x9E, 0x80), + _INIT_CMD(0x00, 0x9F, 0x80), + _INIT_CMD(0x00, 0xA0, 0x8A), + _INIT_CMD(0x00, 0xA2, 0x80), + _INIT_CMD(0x00, 0xA6, 0x80), + _INIT_CMD(0x00, 0xA7, 0x80), + _INIT_CMD(0x00, 0xA9, 0x80), + _INIT_CMD(0x00, 0xAA, 0x80), + _INIT_CMD(0x00, 0xAB, 0x80), + _INIT_CMD(0x00, 0xAC, 0x80), + _INIT_CMD(0x00, 0xAD, 0x80), + _INIT_CMD(0x00, 0xAE, 0x80), + _INIT_CMD(0x00, 0xAF, 0x80), + _INIT_CMD(0x00, 0xB7, 0x76), + _INIT_CMD(0x00, 0xB8, 0x76), + _INIT_CMD(0x00, 0xB9, 0x05), + _INIT_CMD(0x00, 0xBA, 0x0D), + _INIT_CMD(0x00, 0xBB, 0x14), + _INIT_CMD(0x00, 0xBC, 0x0F), + _INIT_CMD(0x00, 0xBD, 0x18), + _INIT_CMD(0x00, 0xBE, 0x1F), + _INIT_CMD(0x00, 0xBF, 0x05), + _INIT_CMD(0x00, 0xC0, 0x0D), + _INIT_CMD(0x00, 0xC1, 0x14), + _INIT_CMD(0x00, 0xC2, 0x03), + _INIT_CMD(0x00, 0xC3, 0x07), + _INIT_CMD(0x00, 0xC4, 0x0A), + _INIT_CMD(0x00, 0xC5, 0xA0), + _INIT_CMD(0x00, 0xC6, 0x55), + _INIT_CMD(0x00, 0xC7, 0xFF), + _INIT_CMD(0x00, 0xC8, 0x39), + _INIT_CMD(0x00, 0xC9, 0x44), + _INIT_CMD(0x00, 0xCA, 0x12), + _INIT_CMD(0x00, 0xCD, 0x80), + _INIT_CMD(0x00, 0xDB, 0x80), + _INIT_CMD(0x00, 0xDC, 0x80), + _INIT_CMD(0x00, 0xDD, 0x80), + _INIT_CMD(0x00, 0xE0, 0x80), + _INIT_CMD(0x00, 0xE1, 0x80), + _INIT_CMD(0x00, 0xE2, 0x80), + _INIT_CMD(0x00, 0xE3, 0x80), + _INIT_CMD(0x00, 0xE4, 0x80), + _INIT_CMD(0x00, 0xE5, 0x40), + _INIT_CMD(0x00, 0xE6, 0x40), + _INIT_CMD(0x00, 0xE7, 0x40), + _INIT_CMD(0x00, 0xE8, 0x40), + _INIT_CMD(0x00, 0xE9, 0x40), + _INIT_CMD(0x00, 0xEA, 0x40), + _INIT_CMD(0x00, 0xEB, 0x40), + _INIT_CMD(0x00, 0xEC, 0x40), + _INIT_CMD(0x00, 0xED, 0x40), + _INIT_CMD(0x00, 0xEE, 0x40), + _INIT_CMD(0x00, 0xEF, 0x40), + _INIT_CMD(0x00, 0xF0, 0x40), + _INIT_CMD(0x00, 0xF1, 0x40), + _INIT_CMD(0x00, 0xF2, 0x40), + _INIT_CMD(0x00, 0xF3, 0x40), + _INIT_CMD(0x00, 0xF4, 0x40), + _INIT_CMD(0x00, 0xF5, 0x40), + _INIT_CMD(0x00, 0xF6, 0x40), + _INIT_CMD(0x00, 0xFB, 0x1), + _INIT_CMD(0x00, 0xFF, 0x23), + _INIT_CMD(0x00, 0xFB, 0x01), + /* dimming enable */ + _INIT_CMD(0x00, 0x01, 0x84), + _INIT_CMD(0x00, 0x05, 0x2D), + _INIT_CMD(0x00, 0x06, 0x00), + /* resolution 1080*2246 */ + _INIT_CMD(0x00, 0x11, 0x01), + _INIT_CMD(0x00, 0x12, 0x7B), + _INIT_CMD(0x00, 0x15, 0x6F), + _INIT_CMD(0x00, 0x16, 0x0B), + /* UI mode */ + _INIT_CMD(0x00, 0x29, 0x0A), + _INIT_CMD(0x00, 0x30, 0xFF), + _INIT_CMD(0x00, 0x31, 0xFF), + _INIT_CMD(0x00, 0x32, 0xFF), + _INIT_CMD(0x00, 0x33, 0xFF), + _INIT_CMD(0x00, 0x34, 0xFF), + _INIT_CMD(0x00, 0x35, 0xFF), + _INIT_CMD(0x00, 0x36, 0xFF), + _INIT_CMD(0x00, 0x37, 0xFF), + _INIT_CMD(0x00, 0x38, 0xFC), + _INIT_CMD(0x00, 0x39, 0xF8), + _INIT_CMD(0x00, 0x3A, 0xF4), + _INIT_CMD(0x00, 0x3B, 0xF1), + _INIT_CMD(0x00, 0x3D, 0xEE), + _INIT_CMD(0x00, 0x3F, 0xEB), + _INIT_CMD(0x00, 0x40, 0xE8), + _INIT_CMD(0x00, 0x41, 0xE5), + /* STILL mode */ + _INIT_CMD(0x00, 0x2A, 0x13), + _INIT_CMD(0x00, 0x45, 0xFF), + _INIT_CMD(0x00, 0x46, 0xFF), + _INIT_CMD(0x00, 0x47, 0xFF), + _INIT_CMD(0x00, 0x48, 0xFF), + _INIT_CMD(0x00, 0x49, 0xFF), + _INIT_CMD(0x00, 0x4A, 0xFF), + _INIT_CMD(0x00, 0x4B, 0xFF), + _INIT_CMD(0x00, 0x4C, 0xFF), + _INIT_CMD(0x00, 0x4D, 0xED), + _INIT_CMD(0x00, 0x4E, 0xD5), + _INIT_CMD(0x00, 0x4F, 0xBF), + _INIT_CMD(0x00, 0x50, 0xA6), + _INIT_CMD(0x00, 0x51, 0x96), + _INIT_CMD(0x00, 0x52, 0x86), + _INIT_CMD(0x00, 0x53, 0x76), + _INIT_CMD(0x00, 0x54, 0x66), + /* MOVING mode */ + _INIT_CMD(0x00, 0x2B, 0x0E), + _INIT_CMD(0x00, 0x58, 0xFF), + _INIT_CMD(0x00, 0x59, 0xFF), + _INIT_CMD(0x00, 0x5A, 0xFF), + _INIT_CMD(0x00, 0x5B, 0xFF), + _INIT_CMD(0x00, 0x5C, 0xFF), + _INIT_CMD(0x00, 0x5D, 0xFF), + _INIT_CMD(0x00, 0x5E, 0xFF), + _INIT_CMD(0x00, 0x5F, 0xFF), + _INIT_CMD(0x00, 0x60, 0xF6), + _INIT_CMD(0x00, 0x61, 0xEA), + _INIT_CMD(0x00, 0x62, 0xE1), + _INIT_CMD(0x00, 0x63, 0xD8), + _INIT_CMD(0x00, 0x64, 0xCE), + _INIT_CMD(0x00, 0x65, 0xC3), + _INIT_CMD(0x00, 0x66, 0xBA), + _INIT_CMD(0x00, 0x67, 0xB3), + _INIT_CMD(0x00, 0xFF, 0x25), + _INIT_CMD(0x00, 0xFB, 0x01), + _INIT_CMD(0x00, 0x05, 0x04), + _INIT_CMD(0x00, 0xFF, 0x26), + _INIT_CMD(0x00, 0xFB, 0x01), + _INIT_CMD(0x00, 0x1C, 0xAF), + _INIT_CMD(0x00, 0xFF, 0x10), + _INIT_CMD(0x00, 0xFB, 0x01), + _INIT_CMD(0x00, 0x51, 0xFF), + _INIT_CMD(0x00, 0x53, 0x24), + _INIT_CMD(0x00, 0x55, 0x00), + + {}, +}; + +static const struct panel_cmd tianma_nt36672a_on_cmds_2[] = { + _INIT_CMD(0x00, 0xFF, 0x24), + _INIT_CMD(0x00, 0xFB, 0x01), + _INIT_CMD(0x00, 0xC3, 0x01), + _INIT_CMD(0x00, 0xC4, 0x54), + _INIT_CMD(0x00, 0xFF, 0x10), + + {}, +}; + +static const struct panel_cmd tianma_nt36672a_off_cmds[] = { + _INIT_CMD(0x00, 0xFF, 0x24), + _INIT_CMD(0x00, 0xFB, 0x01), + _INIT_CMD(0x00, 0xC3, 0x01), + _INIT_CMD(0x00, 0xFF, 0x10), + + {}, +}; + +static const struct drm_display_mode tianma_panel_default_mode = { + .clock = 161331, + + .hdisplay = 1080, + .hsync_start = 1080 + 40, + .hsync_end = 1080 + 40 + 20, + .htotal = 1080 + 40 + 20 + 44, + + .vdisplay = 2246, + .vsync_start = 2246 + 15, + .vsync_end = 2246 + 15 + 2, + .vtotal = 2246 + 15 + 2 + 8, + .vrefresh = 60, + + .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, +}; + +static const struct panel_desc tianma_panel_desc = { + .display_mode = &tianma_panel_default_mode, + + .width_mm = 68, + .height_mm = 136, + + .mode_flags = MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_VIDEO + | MIPI_DSI_MODE_VIDEO_HSE + | MIPI_DSI_CLOCK_NON_CONTINUOUS + | MIPI_DSI_MODE_VIDEO_BURST, + .format = MIPI_DSI_FMT_RGB888, + .lanes = 4, + .on_cmds_1 = tianma_nt36672a_on_cmds_1, + .on_cmds_2 = tianma_nt36672a_on_cmds_2, + .off_cmds = tianma_nt36672a_off_cmds +}; + + +static const struct of_device_id panel_of_match[] = { + { .compatible = "tianma,nt36672a", + .data = &tianma_panel_desc + }, + { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, panel_of_match); + + +static int panel_pinctrl_init(struct panel_info *panel) +{ + struct device *dev = &panel->link->dev; + int rc = 0; + + panel->pinctrl = devm_pinctrl_get(dev); + if (IS_ERR_OR_NULL(panel->pinctrl)) { + rc = PTR_ERR(panel->pinctrl); + pr_err("failed to get pinctrl, rc=%d\n", rc); + goto error; + } + + panel->active = pinctrl_lookup_state(panel->pinctrl, + "panel_active"); + if (IS_ERR_OR_NULL(panel->active)) { + rc = PTR_ERR(panel->active); + pr_err("failed to get pinctrl active state, rc=%d\n", rc); + goto error; + } + + panel->suspend = + pinctrl_lookup_state(panel->pinctrl, "panel_suspend"); + + if (IS_ERR_OR_NULL(panel->suspend)) { + rc = PTR_ERR(panel->suspend); + pr_err("failed to get pinctrl suspend state, rc=%d\n", rc); + goto error; + } + +error: + return rc; +} + +static int panel_add(struct panel_info *pinfo) +{ + struct device *dev = &pinfo->link->dev; + int i, ret; + + for (i = 0; i < ARRAY_SIZE(pinfo->supplies); i++) + pinfo->supplies[i].supply = regulator_names[i]; + + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pinfo->supplies), + pinfo->supplies); + if (ret < 0) + return ret; + + pinfo->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(pinfo->reset_gpio)) { + DRM_DEV_ERROR(dev, "cannot get reset gpio %ld\n", + PTR_ERR(pinfo->reset_gpio)); + return PTR_ERR(pinfo->reset_gpio); + } + + ret = panel_pinctrl_init(pinfo); + if (ret < 0) + return ret; + + drm_panel_init(&pinfo->base, dev, &panel_funcs, + DRM_MODE_CONNECTOR_DSI); + + ret = drm_panel_add(&pinfo->base); + if (ret < 0) + return ret; + return 0; +} + +static void panel_del(struct panel_info *pinfo) +{ + if (pinfo->base.dev) + drm_panel_remove(&pinfo->base); +} + +static int panel_probe(struct mipi_dsi_device *dsi) +{ + struct panel_info *pinfo; + const struct panel_desc *desc; + int err; + + pinfo = devm_kzalloc(&dsi->dev, sizeof(*pinfo), GFP_KERNEL); + if (!pinfo) + return -ENOMEM; + + desc = of_device_get_match_data(&dsi->dev); + dsi->mode_flags = desc->mode_flags; + dsi->format = desc->format; + dsi->lanes = desc->lanes; + pinfo->desc = desc; + pinfo->link = dsi; + + mipi_dsi_set_drvdata(dsi, pinfo); + + err = panel_add(pinfo); + if (err < 0) + return err; + + err = mipi_dsi_attach(dsi); + return err; +} + +static int panel_remove(struct mipi_dsi_device *dsi) +{ + struct panel_info *pinfo = mipi_dsi_get_drvdata(dsi); + int err; + + err = tianma_panel_unprepare(&pinfo->base); + if (err < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n", + err); + + err = tianma_panel_disable(&pinfo->base); + if (err < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err); + + err = mipi_dsi_detach(dsi); + if (err < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n", + err); + + drm_panel_detach(&pinfo->base); + panel_del(pinfo); + + return 0; +} + +static void panel_shutdown(struct mipi_dsi_device *dsi) +{ + struct panel_info *pinfo = mipi_dsi_get_drvdata(dsi); + + tianma_panel_disable(&pinfo->base); + tianma_panel_unprepare(&pinfo->base); +} + +static struct mipi_dsi_driver panel_driver = { + .driver = { + .name = "panel-tianma-nt36672a", + .of_match_table = panel_of_match, + }, + .probe = panel_probe, + .remove = panel_remove, + .shutdown = panel_shutdown, +}; +module_mipi_dsi_driver(panel_driver); + +MODULE_AUTHOR("Sumit Semwal sumit.semwal@linaro.org"); +MODULE_DESCRIPTION("TIANMA NT36672A MIPI-DSI LCD panel"); +MODULE_LICENSE("GPL");