514 lines
10 KiB
C
514 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2019 Theobroma Systems Design und Consulting GmbH
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*
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* base on panel-kingdisplay-kd097d04.c
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* Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
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*/
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#include <linux/backlight.h>
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/regulator/consumer.h>
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#include <video/mipi_display.h>
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#include <drm/drm_crtc.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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struct ltk500hd1829 {
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struct device *dev;
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struct drm_panel panel;
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struct gpio_desc *reset_gpio;
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struct regulator *vcc;
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struct regulator *iovcc;
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bool prepared;
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};
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struct ltk500hd1829_cmd {
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char cmd;
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char data;
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};
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/*
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* There is no description in the Reference Manual about these commands.
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* We received them from the vendor, so just use them as is.
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*/
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static const struct ltk500hd1829_cmd init_code[] = {
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{ 0xE0, 0x00 },
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{ 0xE1, 0x93 },
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{ 0xE2, 0x65 },
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{ 0xE3, 0xF8 },
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{ 0x80, 0x03 },
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{ 0xE0, 0x04 },
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{ 0x2D, 0x03 },
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{ 0xE0, 0x01 },
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{ 0x00, 0x00 },
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{ 0x01, 0xB6 },
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{ 0x03, 0x00 },
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{ 0x04, 0xC5 },
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{ 0x17, 0x00 },
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{ 0x18, 0xBF },
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{ 0x19, 0x01 },
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{ 0x1A, 0x00 },
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{ 0x1B, 0xBF },
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{ 0x1C, 0x01 },
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{ 0x1F, 0x7C },
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{ 0x20, 0x26 },
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{ 0x21, 0x26 },
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{ 0x22, 0x4E },
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{ 0x37, 0x09 },
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{ 0x38, 0x04 },
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{ 0x39, 0x08 },
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{ 0x3A, 0x1F },
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{ 0x3B, 0x1F },
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{ 0x3C, 0x78 },
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{ 0x3D, 0xFF },
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{ 0x3E, 0xFF },
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{ 0x3F, 0x00 },
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{ 0x40, 0x04 },
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{ 0x41, 0xA0 },
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{ 0x43, 0x0F },
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{ 0x44, 0x0A },
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{ 0x45, 0x24 },
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{ 0x55, 0x01 },
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{ 0x56, 0x01 },
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{ 0x57, 0xA5 },
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{ 0x58, 0x0A },
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{ 0x59, 0x4A },
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{ 0x5A, 0x38 },
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{ 0x5B, 0x10 },
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{ 0x5C, 0x19 },
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{ 0x5D, 0x7C },
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{ 0x5E, 0x64 },
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{ 0x5F, 0x54 },
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{ 0x60, 0x48 },
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{ 0x61, 0x44 },
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{ 0x62, 0x35 },
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{ 0x63, 0x3A },
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{ 0x64, 0x24 },
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{ 0x65, 0x3B },
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{ 0x66, 0x39 },
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{ 0x67, 0x37 },
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{ 0x68, 0x56 },
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{ 0x69, 0x41 },
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{ 0x6A, 0x47 },
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{ 0x6B, 0x2F },
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{ 0x6C, 0x23 },
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{ 0x6D, 0x13 },
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{ 0x6E, 0x02 },
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{ 0x6F, 0x08 },
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{ 0x70, 0x7C },
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{ 0x71, 0x64 },
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{ 0x72, 0x54 },
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{ 0x73, 0x48 },
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{ 0x74, 0x44 },
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{ 0x75, 0x35 },
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{ 0x76, 0x3A },
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{ 0x77, 0x22 },
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{ 0x78, 0x3B },
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{ 0x79, 0x39 },
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{ 0x7A, 0x38 },
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{ 0x7B, 0x52 },
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{ 0x7C, 0x41 },
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{ 0x7D, 0x47 },
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{ 0x7E, 0x2F },
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{ 0x7F, 0x23 },
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{ 0x80, 0x13 },
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{ 0x81, 0x02 },
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{ 0x82, 0x08 },
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{ 0xE0, 0x02 },
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{ 0x00, 0x57 },
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{ 0x01, 0x77 },
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{ 0x02, 0x44 },
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{ 0x03, 0x46 },
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{ 0x04, 0x48 },
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{ 0x05, 0x4A },
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{ 0x06, 0x4C },
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{ 0x07, 0x4E },
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{ 0x08, 0x50 },
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{ 0x09, 0x55 },
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{ 0x0A, 0x52 },
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{ 0x0B, 0x55 },
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{ 0x0C, 0x55 },
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{ 0x0D, 0x55 },
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{ 0x0E, 0x55 },
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{ 0x0F, 0x55 },
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{ 0x10, 0x55 },
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{ 0x11, 0x55 },
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{ 0x12, 0x55 },
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{ 0x13, 0x40 },
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{ 0x14, 0x55 },
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{ 0x15, 0x55 },
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{ 0x16, 0x57 },
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{ 0x17, 0x77 },
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{ 0x18, 0x45 },
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{ 0x19, 0x47 },
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{ 0x1A, 0x49 },
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{ 0x1B, 0x4B },
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{ 0x1C, 0x4D },
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{ 0x1D, 0x4F },
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{ 0x1E, 0x51 },
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{ 0x1F, 0x55 },
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{ 0x20, 0x53 },
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{ 0x21, 0x55 },
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{ 0x22, 0x55 },
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{ 0x23, 0x55 },
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{ 0x24, 0x55 },
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{ 0x25, 0x55 },
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{ 0x26, 0x55 },
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{ 0x27, 0x55 },
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{ 0x28, 0x55 },
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{ 0x29, 0x41 },
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{ 0x2A, 0x55 },
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{ 0x2B, 0x55 },
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{ 0x2C, 0x57 },
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{ 0x2D, 0x77 },
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{ 0x2E, 0x4F },
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{ 0x2F, 0x4D },
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{ 0x30, 0x4B },
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{ 0x31, 0x49 },
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{ 0x32, 0x47 },
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{ 0x33, 0x45 },
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{ 0x34, 0x41 },
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{ 0x35, 0x55 },
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{ 0x36, 0x53 },
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{ 0x37, 0x55 },
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{ 0x38, 0x55 },
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{ 0x39, 0x55 },
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{ 0x3A, 0x55 },
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{ 0x3B, 0x55 },
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{ 0x3C, 0x55 },
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{ 0x3D, 0x55 },
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{ 0x3E, 0x55 },
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{ 0x3F, 0x51 },
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{ 0x40, 0x55 },
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{ 0x41, 0x55 },
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{ 0x42, 0x57 },
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{ 0x43, 0x77 },
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{ 0x44, 0x4E },
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{ 0x45, 0x4C },
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{ 0x46, 0x4A },
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{ 0x47, 0x48 },
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{ 0x48, 0x46 },
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{ 0x49, 0x44 },
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{ 0x4A, 0x40 },
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{ 0x4B, 0x55 },
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{ 0x4C, 0x52 },
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{ 0x4D, 0x55 },
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{ 0x4E, 0x55 },
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{ 0x4F, 0x55 },
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{ 0x50, 0x55 },
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{ 0x51, 0x55 },
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{ 0x52, 0x55 },
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{ 0x53, 0x55 },
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{ 0x54, 0x55 },
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{ 0x55, 0x50 },
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{ 0x56, 0x55 },
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{ 0x57, 0x55 },
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{ 0x58, 0x40 },
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{ 0x59, 0x00 },
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{ 0x5A, 0x00 },
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{ 0x5B, 0x10 },
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{ 0x5C, 0x09 },
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{ 0x5D, 0x30 },
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{ 0x5E, 0x01 },
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{ 0x5F, 0x02 },
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{ 0x60, 0x30 },
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{ 0x61, 0x03 },
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{ 0x62, 0x04 },
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{ 0x63, 0x06 },
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{ 0x64, 0x6A },
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{ 0x65, 0x75 },
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{ 0x66, 0x0F },
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{ 0x67, 0xB3 },
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{ 0x68, 0x0B },
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{ 0x69, 0x06 },
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{ 0x6A, 0x6A },
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{ 0x6B, 0x10 },
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{ 0x6C, 0x00 },
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{ 0x6D, 0x04 },
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{ 0x6E, 0x04 },
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{ 0x6F, 0x88 },
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{ 0x70, 0x00 },
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{ 0x71, 0x00 },
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{ 0x72, 0x06 },
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{ 0x73, 0x7B },
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{ 0x74, 0x00 },
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{ 0x75, 0xBC },
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{ 0x76, 0x00 },
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{ 0x77, 0x05 },
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{ 0x78, 0x2E },
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{ 0x79, 0x00 },
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{ 0x7A, 0x00 },
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{ 0x7B, 0x00 },
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{ 0x7C, 0x00 },
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{ 0x7D, 0x03 },
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{ 0x7E, 0x7B },
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{ 0xE0, 0x04 },
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{ 0x09, 0x10 },
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{ 0x2B, 0x2B },
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{ 0x2E, 0x44 },
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{ 0xE0, 0x00 },
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{ 0xE6, 0x02 },
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{ 0xE7, 0x02 },
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{ 0x35, 0x00 },
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};
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static inline
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struct ltk500hd1829 *panel_to_ltk500hd1829(struct drm_panel *panel)
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{
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return container_of(panel, struct ltk500hd1829, panel);
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}
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static int ltk500hd1829_unprepare(struct drm_panel *panel)
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{
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struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
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struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
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int ret;
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if (!ctx->prepared)
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return 0;
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ret = mipi_dsi_dcs_set_display_off(dsi);
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if (ret < 0)
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dev_err(panel->dev, "failed to set display off: %d\n", ret);
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ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
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if (ret < 0) {
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dev_err(panel->dev, "failed to enter sleep mode: %d\n", ret);
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}
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/* 120ms to enter sleep mode */
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msleep(120);
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regulator_disable(ctx->iovcc);
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regulator_disable(ctx->vcc);
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ctx->prepared = false;
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return 0;
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}
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static int ltk500hd1829_prepare(struct drm_panel *panel)
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{
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struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
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struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
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unsigned int i;
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int ret;
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if (ctx->prepared)
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return 0;
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ret = regulator_enable(ctx->vcc);
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if (ret < 0) {
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dev_err(ctx->dev, "Failed to enable vci supply: %d\n", ret);
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return ret;
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}
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ret = regulator_enable(ctx->iovcc);
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if (ret < 0) {
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dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);
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goto disable_vcc;
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}
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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/* tRW: 10us */
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usleep_range(10, 20);
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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/* tRT: >= 5ms */
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usleep_range(5000, 6000);
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for (i = 0; i < ARRAY_SIZE(init_code); i++) {
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ret = mipi_dsi_generic_write(dsi, &init_code[i],
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sizeof(struct ltk500hd1829_cmd));
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if (ret < 0) {
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dev_err(panel->dev, "failed to write init cmds: %d\n", ret);
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goto disable_iovcc;
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}
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}
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ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
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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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goto disable_iovcc;
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}
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/* 120ms to exit sleep mode */
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msleep(120);
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ret = mipi_dsi_dcs_set_display_on(dsi);
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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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goto disable_iovcc;
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}
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ctx->prepared = true;
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return 0;
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disable_iovcc:
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regulator_disable(ctx->iovcc);
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disable_vcc:
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regulator_disable(ctx->vcc);
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return ret;
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}
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static const struct drm_display_mode default_mode = {
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.hdisplay = 720,
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.hsync_start = 720 + 50,
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.hsync_end = 720 + 50 + 50,
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.htotal = 720 + 50 + 50 + 50,
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.vdisplay = 1280,
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.vsync_start = 1280 + 30,
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.vsync_end = 1280 + 30 + 4,
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.vtotal = 1280 + 30 + 4 + 12,
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.clock = 69217,
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.width_mm = 62,
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.height_mm = 110,
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};
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static int ltk500hd1829_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
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struct drm_display_mode *mode;
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mode = drm_mode_duplicate(connector->dev, &default_mode);
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if (!mode) {
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dev_err(ctx->dev, "failed to add mode %ux%u@%u\n",
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default_mode.hdisplay, default_mode.vdisplay,
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drm_mode_vrefresh(&default_mode));
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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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connector->display_info.width_mm = mode->width_mm;
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connector->display_info.height_mm = mode->height_mm;
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drm_mode_probed_add(connector, mode);
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return 1;
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}
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static const struct drm_panel_funcs ltk500hd1829_funcs = {
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.unprepare = ltk500hd1829_unprepare,
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.prepare = ltk500hd1829_prepare,
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.get_modes = ltk500hd1829_get_modes,
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};
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static int ltk500hd1829_probe(struct mipi_dsi_device *dsi)
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{
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struct ltk500hd1829 *ctx;
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struct device *dev = &dsi->dev;
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int ret;
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ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(ctx->reset_gpio)) {
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dev_err(dev, "cannot get reset gpio\n");
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return PTR_ERR(ctx->reset_gpio);
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}
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ctx->vcc = devm_regulator_get(dev, "vcc");
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if (IS_ERR(ctx->vcc)) {
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ret = PTR_ERR(ctx->vcc);
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if (ret != -EPROBE_DEFER)
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dev_err(dev, "Failed to request vcc regulator: %d\n", ret);
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return ret;
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}
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ctx->iovcc = devm_regulator_get(dev, "iovcc");
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if (IS_ERR(ctx->iovcc)) {
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ret = PTR_ERR(ctx->iovcc);
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if (ret != -EPROBE_DEFER)
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dev_err(dev, "Failed to request iovcc regulator: %d\n", ret);
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return ret;
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}
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mipi_dsi_set_drvdata(dsi, ctx);
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ctx->dev = dev;
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dsi->lanes = 4;
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dsi->format = MIPI_DSI_FMT_RGB888;
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dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
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MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET;
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drm_panel_init(&ctx->panel, &dsi->dev, <k500hd1829_funcs,
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DRM_MODE_CONNECTOR_DSI);
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ret = drm_panel_of_backlight(&ctx->panel);
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if (ret)
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return ret;
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drm_panel_add(&ctx->panel);
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ret = mipi_dsi_attach(dsi);
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if (ret < 0) {
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dev_err(dev, "mipi_dsi_attach failed: %d\n", ret);
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drm_panel_remove(&ctx->panel);
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return ret;
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}
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return 0;
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}
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static void ltk500hd1829_shutdown(struct mipi_dsi_device *dsi)
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{
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struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi);
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int ret;
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ret = drm_panel_unprepare(&ctx->panel);
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if (ret < 0)
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dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);
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ret = drm_panel_disable(&ctx->panel);
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if (ret < 0)
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dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);
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}
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static void ltk500hd1829_remove(struct mipi_dsi_device *dsi)
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{
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struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi);
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int ret;
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ltk500hd1829_shutdown(dsi);
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ret = mipi_dsi_detach(dsi);
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if (ret < 0)
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dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
|
|
|
|
drm_panel_remove(&ctx->panel);
|
|
}
|
|
|
|
static const struct of_device_id ltk500hd1829_of_match[] = {
|
|
{ .compatible = "leadtek,ltk500hd1829", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ltk500hd1829_of_match);
|
|
|
|
static struct mipi_dsi_driver ltk500hd1829_driver = {
|
|
.driver = {
|
|
.name = "panel-leadtek-ltk500hd1829",
|
|
.of_match_table = ltk500hd1829_of_match,
|
|
},
|
|
.probe = ltk500hd1829_probe,
|
|
.remove = ltk500hd1829_remove,
|
|
.shutdown = ltk500hd1829_shutdown,
|
|
};
|
|
module_mipi_dsi_driver(ltk500hd1829_driver);
|
|
|
|
MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");
|
|
MODULE_DESCRIPTION("Leadtek LTK500HD1829 panel driver");
|
|
MODULE_LICENSE("GPL v2");
|