// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2020 Theobroma Systems Design und Consulting GmbH #include <linux/delay.h>#include <linux/gpio/consumer.h>#include <linux/media-bus-format.h>#include <linux/module.h>#include <linux/of.h>#include <linux/regulator/consumer.h>#include <video/display_timing.h>#include <video/mipi_display.h>#include <drm/drm_mipi_dsi.h>#include <drm/drm_modes.h>#include <drm/drm_panel.h>struct ltk050h3146w_cmd {char cmd;char data;struct ltk050h3146w;struct ltk050h3146w_desc {const unsigned long mode_flags;const struct drm_display_mode *mode;void (*init)(struct mipi_dsi_multi_context *dsi_ctx);struct ltk050h3146w {struct device *dev;struct drm_panel panel;struct gpio_desc *reset_gpio;struct regulator *vci;struct regulator *iovcc;const struct ltk050h3146w_desc *panel_desc;static const struct ltk050h3146w_cmd page1_cmds[] = {/* BGR SS GS */ /* column inversion */ /* VCOM1 */ /* VCOM2 */ /* VREG1OUT=5V */ /* VREG2OUT=-5V */ /* EQT Time setting */ /* * The vendor init selected page 1 here _again_ * Is this supposed to be page 2? static const struct ltk050h3146w_cmd page3_cmds[] = {static const struct ltk050h3146w_cmd page4_cmds[] = {/* VGH_MOD clamp level=15v */ /* VGH clamp level 15V */ /* VGL clamp level (-10V) */ /* GAMMA OP */ /* SOURCE OP */ /* PS_EN OFF */ /* LVD */ static inline struct ltk050h3146w *panel_to_ltk050h3146w(struct drm_panel *panel)return container_of(panel, struct ltk050h3146w, panel);static void ltk050h3148w_init_sequence(struct mipi_dsi_multi_context *dsi_ctx)/* * Init sequence was supplied by the panel vendor without much * documentation. static const struct drm_display_mode ltk050h3148w_mode = {static const struct ltk050h3146w_desc ltk050h3148w_data = {static void ltk050h3146w_init_sequence(struct mipi_dsi_multi_context *dsi_ctx)/* * Init sequence was supplied by the panel vendor without much * documentation. static const struct drm_display_mode ltk050h3146w_mode = {static const struct ltk050h3146w_desc ltk050h3146w_data = {static void ltk050h3146w_a2_select_page(struct mipi_dsi_multi_context *dsi_ctx, int page)static void ltk050h3146w_a2_write_page(struct mipi_dsi_multi_context *dsi_ctx, int page,const struct ltk050h3146w_cmd *cmds,int num)for (int i = 0; i < num; i++)sizeof (struct ltk050h3146w_cmd));static void ltk050h3146w_a2_init_sequence(struct mipi_dsi_multi_context *dsi_ctx)/* * Init sequence was supplied by the panel vendor without much * documentation. /* vendor code called this without param, where there should be one */ static const struct drm_display_mode ltk050h3146w_a2_mode = {static const struct ltk050h3146w_desc ltk050h3146w_a2_data = {static int ltk050h3146w_unprepare(struct drm_panel *panel)struct ltk050h3146w *ctx = panel_to_ltk050h3146w(panel);struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };if (dsi_ctx.accum_err)return dsi_ctx.accum_err;return 0;static int ltk050h3146w_prepare(struct drm_panel *panel)struct ltk050h3146w *ctx = panel_to_ltk050h3146w(panel);struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };"Resetting the panel\n" );if (dsi_ctx.accum_err) {"Failed to enable vci supply: %d\n" , dsi_ctx.accum_err);return dsi_ctx.accum_err;if (dsi_ctx.accum_err) {"Failed to enable iovcc supply: %d\n" , dsi_ctx.accum_err);goto disable_vci;/* T9: 120ms */ if (dsi_ctx.accum_err)goto disable_iovcc;return 0;return dsi_ctx.accum_err;static int ltk050h3146w_get_modes(struct drm_panel *panel,struct drm_connector *connector)struct ltk050h3146w *ctx = panel_to_ltk050h3146w(panel);struct drm_display_mode *mode;if (!mode)return -ENOMEM;return 1;static const struct drm_panel_funcs ltk050h3146w_funcs = {static int ltk050h3146w_probe(struct mipi_dsi_device *dsi)struct device *dev = &dsi->dev;struct ltk050h3146w *ctx;int ret;struct ltk050h3146w, panel,if (IS_ERR(ctx))return PTR_ERR(ctx);if (!ctx->panel_desc)return -EINVAL;"reset" , GPIOD_OUT_LOW);if (IS_ERR(ctx->reset_gpio))return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), "cannot get reset gpio\n" );"vci" );if (IS_ERR(ctx->vci))return dev_err_probe(dev, PTR_ERR(ctx->vci), "Failed to request vci regulator\n" );"iovcc" );if (IS_ERR(ctx->iovcc))return dev_err_probe(dev, PTR_ERR(ctx->iovcc),"Failed to request iovcc regulator\n" );if (ret)return ret;if (ret < 0) {"mipi_dsi_attach failed: %d\n" , ret);return ret;return 0;static void ltk050h3146w_remove(struct mipi_dsi_device *dsi)struct ltk050h3146w *ctx = mipi_dsi_get_drvdata(dsi);int ret;if (ret < 0)"Failed to detach from DSI host: %d\n" , ret);static const struct of_device_id ltk050h3146w_of_match[] = {"leadtek,ltk050h3146w" ,"leadtek,ltk050h3146w-a2" ,"leadtek,ltk050h3148w" ,/* sentinel */ } static struct mipi_dsi_driver ltk050h3146w_driver = {"panel-leadtek-ltk050h3146w" ,"Heiko Stuebner " );"DRM driver for Leadtek LTK050H3146W MIPI DSI panel" );"GPL v2" );
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