660 lines
14 KiB
C
660 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Raydium RM67191 MIPI-DSI panel driver
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*
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* Copyright 2019 NXP
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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/media-bus-format.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 <video/of_videomode.h>
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#include <video/videomode.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_panel.h>
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/* Panel specific color-format bits */
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#define COL_FMT_16BPP 0x55
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#define COL_FMT_18BPP 0x66
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#define COL_FMT_24BPP 0x77
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/* Write Manufacture Command Set Control */
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#define WRMAUCCTR 0xFE
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/* Manufacturer Command Set pages (CMD2) */
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struct cmd_set_entry {
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u8 cmd;
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u8 param;
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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 vendor, so just use them as is.
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*/
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static const struct cmd_set_entry manufacturer_cmd_set[] = {
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{0xFE, 0x0B},
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{0x28, 0x40},
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{0x29, 0x4F},
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{0xFE, 0x0E},
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{0x4B, 0x00},
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{0x4C, 0x0F},
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{0x4D, 0x20},
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{0x4E, 0x40},
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{0x4F, 0x60},
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{0x50, 0xA0},
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{0x51, 0xC0},
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{0x52, 0xE0},
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{0x53, 0xFF},
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{0xFE, 0x0D},
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{0x18, 0x08},
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{0x42, 0x00},
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{0x08, 0x41},
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{0x46, 0x02},
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{0x72, 0x09},
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{0xFE, 0x0A},
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{0x24, 0x17},
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{0x04, 0x07},
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{0x1A, 0x0C},
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{0x0F, 0x44},
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{0xFE, 0x04},
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{0x00, 0x0C},
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{0x05, 0x08},
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{0x06, 0x08},
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{0x08, 0x08},
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{0x09, 0x08},
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{0x0A, 0xE6},
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{0x0B, 0x8C},
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{0x1A, 0x12},
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{0x1E, 0xE0},
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{0x29, 0x93},
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{0x2A, 0x93},
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{0x2F, 0x02},
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{0x31, 0x02},
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{0x33, 0x05},
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{0x37, 0x2D},
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{0x38, 0x2D},
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{0x3A, 0x1E},
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{0x3B, 0x1E},
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{0x3D, 0x27},
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{0x3F, 0x80},
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{0x40, 0x40},
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{0x41, 0xE0},
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{0x4F, 0x2F},
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{0x50, 0x1E},
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{0xFE, 0x06},
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{0x00, 0xCC},
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{0x05, 0x05},
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{0x07, 0xA2},
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{0x08, 0xCC},
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{0x0D, 0x03},
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{0x0F, 0xA2},
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{0x32, 0xCC},
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{0x37, 0x05},
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{0x39, 0x83},
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{0x3A, 0xCC},
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{0x41, 0x04},
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{0x43, 0x83},
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{0x44, 0xCC},
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{0x49, 0x05},
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{0x4B, 0xA2},
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{0x4C, 0xCC},
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{0x51, 0x03},
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{0x53, 0xA2},
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{0x75, 0xCC},
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{0x7A, 0x03},
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{0x7C, 0x83},
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{0x7D, 0xCC},
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{0x82, 0x02},
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{0x84, 0x83},
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{0x85, 0xEC},
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{0x86, 0x0F},
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{0x87, 0xFF},
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{0x88, 0x00},
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{0x8A, 0x02},
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{0x8C, 0xA2},
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{0x8D, 0xEA},
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{0x8E, 0x01},
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{0x8F, 0xE8},
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{0xFE, 0x06},
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{0x90, 0x0A},
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{0x92, 0x06},
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{0x93, 0xA0},
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{0x94, 0xA8},
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{0x95, 0xEC},
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{0x96, 0x0F},
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{0x97, 0xFF},
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{0x98, 0x00},
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{0x9A, 0x02},
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{0x9C, 0xA2},
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{0xAC, 0x04},
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{0xFE, 0x06},
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{0xB1, 0x12},
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{0xB2, 0x17},
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{0xB3, 0x17},
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{0xB4, 0x17},
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{0xB5, 0x17},
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{0xB6, 0x11},
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{0xB7, 0x08},
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{0xB8, 0x09},
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{0xB9, 0x06},
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{0xBA, 0x07},
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{0xBB, 0x17},
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{0xBC, 0x17},
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{0xBD, 0x17},
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{0xBE, 0x17},
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{0xBF, 0x17},
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{0xC0, 0x17},
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{0xC1, 0x17},
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{0xC2, 0x17},
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{0xC3, 0x17},
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{0xC4, 0x0F},
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{0xC5, 0x0E},
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{0xC6, 0x00},
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{0xC7, 0x01},
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{0xC8, 0x10},
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{0xFE, 0x06},
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{0x95, 0xEC},
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{0x8D, 0xEE},
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{0x44, 0xEC},
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{0x4C, 0xEC},
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{0x32, 0xEC},
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{0x3A, 0xEC},
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{0x7D, 0xEC},
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{0x75, 0xEC},
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{0x00, 0xEC},
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{0x08, 0xEC},
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{0x85, 0xEC},
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{0xA6, 0x21},
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{0xA7, 0x05},
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{0xA9, 0x06},
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{0x82, 0x06},
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{0x41, 0x06},
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{0x7A, 0x07},
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{0x37, 0x07},
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{0x05, 0x06},
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{0x49, 0x06},
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{0x0D, 0x04},
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{0x51, 0x04},
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};
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static const u32 rad_bus_formats[] = {
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MEDIA_BUS_FMT_RGB888_1X24,
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MEDIA_BUS_FMT_RGB666_1X18,
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MEDIA_BUS_FMT_RGB565_1X16,
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};
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static const u32 rad_bus_flags = DRM_BUS_FLAG_DE_LOW |
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DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE;
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struct rad_panel {
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struct drm_panel panel;
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struct mipi_dsi_device *dsi;
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struct gpio_desc *reset;
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struct backlight_device *backlight;
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struct regulator_bulk_data *supplies;
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unsigned int num_supplies;
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bool prepared;
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bool enabled;
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};
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static const struct drm_display_mode default_mode = {
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.clock = 132000,
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.hdisplay = 1080,
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.hsync_start = 1080 + 20,
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.hsync_end = 1080 + 20 + 2,
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.htotal = 1080 + 20 + 2 + 34,
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.vdisplay = 1920,
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.vsync_start = 1920 + 10,
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.vsync_end = 1920 + 10 + 2,
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.vtotal = 1920 + 10 + 2 + 4,
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.width_mm = 68,
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.height_mm = 121,
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.flags = DRM_MODE_FLAG_NHSYNC |
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DRM_MODE_FLAG_NVSYNC,
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};
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static inline struct rad_panel *to_rad_panel(struct drm_panel *panel)
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{
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return container_of(panel, struct rad_panel, panel);
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}
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static int rad_panel_push_cmd_list(struct mipi_dsi_device *dsi)
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{
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size_t i;
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size_t count = ARRAY_SIZE(manufacturer_cmd_set);
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int ret = 0;
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for (i = 0; i < count; i++) {
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const struct cmd_set_entry *entry = &manufacturer_cmd_set[i];
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u8 buffer[2] = { entry->cmd, entry->param };
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ret = mipi_dsi_generic_write(dsi, &buffer, sizeof(buffer));
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if (ret < 0)
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return ret;
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}
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return ret;
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};
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static int color_format_from_dsi_format(enum mipi_dsi_pixel_format format)
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{
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switch (format) {
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case MIPI_DSI_FMT_RGB565:
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return COL_FMT_16BPP;
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case MIPI_DSI_FMT_RGB666:
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case MIPI_DSI_FMT_RGB666_PACKED:
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return COL_FMT_18BPP;
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case MIPI_DSI_FMT_RGB888:
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return COL_FMT_24BPP;
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default:
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return COL_FMT_24BPP; /* for backward compatibility */
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}
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};
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static int rad_panel_prepare(struct drm_panel *panel)
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{
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struct rad_panel *rad = to_rad_panel(panel);
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int ret;
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if (rad->prepared)
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return 0;
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ret = regulator_bulk_enable(rad->num_supplies, rad->supplies);
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if (ret)
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return ret;
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if (rad->reset) {
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gpiod_set_value_cansleep(rad->reset, 1);
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usleep_range(3000, 5000);
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gpiod_set_value_cansleep(rad->reset, 0);
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usleep_range(18000, 20000);
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}
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rad->prepared = true;
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return 0;
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}
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static int rad_panel_unprepare(struct drm_panel *panel)
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{
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struct rad_panel *rad = to_rad_panel(panel);
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int ret;
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if (!rad->prepared)
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return 0;
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/*
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* Right after asserting the reset, we need to release it, so that the
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* touch driver can have an active connection with the touch controller
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* even after the display is turned off.
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*/
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if (rad->reset) {
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gpiod_set_value_cansleep(rad->reset, 1);
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usleep_range(15000, 17000);
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gpiod_set_value_cansleep(rad->reset, 0);
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}
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ret = regulator_bulk_disable(rad->num_supplies, rad->supplies);
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if (ret)
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return ret;
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rad->prepared = false;
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return 0;
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}
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static int rad_panel_enable(struct drm_panel *panel)
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{
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struct rad_panel *rad = to_rad_panel(panel);
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struct mipi_dsi_device *dsi = rad->dsi;
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struct device *dev = &dsi->dev;
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int color_format = color_format_from_dsi_format(dsi->format);
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int ret;
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if (rad->enabled)
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return 0;
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dsi->mode_flags |= MIPI_DSI_MODE_LPM;
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ret = rad_panel_push_cmd_list(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to send MCS (%d)\n", ret);
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goto fail;
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}
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/* Select User Command Set table (CMD1) */
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ret = mipi_dsi_generic_write(dsi, (u8[]){ WRMAUCCTR, 0x00 }, 2);
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if (ret < 0)
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goto fail;
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/* Software reset */
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ret = mipi_dsi_dcs_soft_reset(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to do Software Reset (%d)\n", ret);
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goto fail;
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}
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usleep_range(15000, 17000);
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/* Set DSI mode */
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ret = mipi_dsi_generic_write(dsi, (u8[]){ 0xC2, 0x0B }, 2);
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if (ret < 0) {
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dev_err(dev, "Failed to set DSI mode (%d)\n", ret);
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goto fail;
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}
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/* Set tear ON */
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ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
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if (ret < 0) {
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dev_err(dev, "Failed to set tear ON (%d)\n", ret);
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goto fail;
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}
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/* Set tear scanline */
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ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0x380);
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if (ret < 0) {
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dev_err(dev, "Failed to set tear scanline (%d)\n", ret);
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goto fail;
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}
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/* Set pixel format */
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ret = mipi_dsi_dcs_set_pixel_format(dsi, color_format);
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dev_dbg(dev, "Interface color format set to 0x%x\n", color_format);
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if (ret < 0) {
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dev_err(dev, "Failed to set pixel format (%d)\n", ret);
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goto fail;
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}
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/* Exit sleep mode */
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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(dev, "Failed to exit sleep mode (%d)\n", ret);
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goto fail;
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}
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usleep_range(5000, 7000);
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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(dev, "Failed to set display ON (%d)\n", ret);
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goto fail;
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}
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backlight_enable(rad->backlight);
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rad->enabled = true;
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return 0;
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fail:
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gpiod_set_value_cansleep(rad->reset, 1);
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return ret;
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}
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static int rad_panel_disable(struct drm_panel *panel)
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{
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struct rad_panel *rad = to_rad_panel(panel);
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struct mipi_dsi_device *dsi = rad->dsi;
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struct device *dev = &dsi->dev;
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int ret;
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if (!rad->enabled)
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return 0;
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dsi->mode_flags |= MIPI_DSI_MODE_LPM;
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backlight_disable(rad->backlight);
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usleep_range(10000, 12000);
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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(dev, "Failed to set display OFF (%d)\n", ret);
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return ret;
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}
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usleep_range(5000, 10000);
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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(dev, "Failed to enter sleep mode (%d)\n", ret);
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return ret;
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}
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rad->enabled = false;
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return 0;
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}
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static int rad_panel_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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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(panel->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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drm_mode_probed_add(connector, mode);
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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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connector->display_info.bus_flags = rad_bus_flags;
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drm_display_info_set_bus_formats(&connector->display_info,
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rad_bus_formats,
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ARRAY_SIZE(rad_bus_formats));
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return 1;
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}
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static int rad_bl_get_brightness(struct backlight_device *bl)
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{
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struct mipi_dsi_device *dsi = bl_get_data(bl);
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struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
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u16 brightness;
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int ret;
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if (!rad->prepared)
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return 0;
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dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
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ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
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if (ret < 0)
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return ret;
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bl->props.brightness = brightness;
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return brightness & 0xff;
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}
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static int rad_bl_update_status(struct backlight_device *bl)
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{
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struct mipi_dsi_device *dsi = bl_get_data(bl);
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struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
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int ret = 0;
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if (!rad->prepared)
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return 0;
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dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
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ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
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if (ret < 0)
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return ret;
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return 0;
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}
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static const struct backlight_ops rad_bl_ops = {
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.update_status = rad_bl_update_status,
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.get_brightness = rad_bl_get_brightness,
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};
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static const struct drm_panel_funcs rad_panel_funcs = {
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.prepare = rad_panel_prepare,
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.unprepare = rad_panel_unprepare,
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.enable = rad_panel_enable,
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.disable = rad_panel_disable,
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.get_modes = rad_panel_get_modes,
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};
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|
static const char * const rad_supply_names[] = {
|
|
"v3p3",
|
|
"v1p8",
|
|
};
|
|
|
|
static int rad_init_regulators(struct rad_panel *rad)
|
|
{
|
|
struct device *dev = &rad->dsi->dev;
|
|
int i;
|
|
|
|
rad->num_supplies = ARRAY_SIZE(rad_supply_names);
|
|
rad->supplies = devm_kcalloc(dev, rad->num_supplies,
|
|
sizeof(*rad->supplies), GFP_KERNEL);
|
|
if (!rad->supplies)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < rad->num_supplies; i++)
|
|
rad->supplies[i].supply = rad_supply_names[i];
|
|
|
|
return devm_regulator_bulk_get(dev, rad->num_supplies, rad->supplies);
|
|
};
|
|
|
|
static int rad_panel_probe(struct mipi_dsi_device *dsi)
|
|
{
|
|
struct device *dev = &dsi->dev;
|
|
struct device_node *np = dev->of_node;
|
|
struct rad_panel *panel;
|
|
struct backlight_properties bl_props;
|
|
int ret;
|
|
u32 video_mode;
|
|
|
|
panel = devm_kzalloc(&dsi->dev, sizeof(*panel), GFP_KERNEL);
|
|
if (!panel)
|
|
return -ENOMEM;
|
|
|
|
mipi_dsi_set_drvdata(dsi, panel);
|
|
|
|
panel->dsi = dsi;
|
|
|
|
dsi->format = MIPI_DSI_FMT_RGB888;
|
|
dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO;
|
|
|
|
ret = of_property_read_u32(np, "video-mode", &video_mode);
|
|
if (!ret) {
|
|
switch (video_mode) {
|
|
case 0:
|
|
/* burst mode */
|
|
dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_BURST;
|
|
break;
|
|
case 1:
|
|
/* non-burst mode with sync event */
|
|
break;
|
|
case 2:
|
|
/* non-burst mode with sync pulse */
|
|
dsi->mode_flags |= MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
|
|
break;
|
|
default:
|
|
dev_warn(dev, "invalid video mode %d\n", video_mode);
|
|
break;
|
|
}
|
|
}
|
|
|
|
ret = of_property_read_u32(np, "dsi-lanes", &dsi->lanes);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to get dsi-lanes property (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
panel->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
|
|
if (IS_ERR(panel->reset))
|
|
return PTR_ERR(panel->reset);
|
|
|
|
memset(&bl_props, 0, sizeof(bl_props));
|
|
bl_props.type = BACKLIGHT_RAW;
|
|
bl_props.brightness = 255;
|
|
bl_props.max_brightness = 255;
|
|
|
|
panel->backlight = devm_backlight_device_register(dev, dev_name(dev),
|
|
dev, dsi, &rad_bl_ops,
|
|
&bl_props);
|
|
if (IS_ERR(panel->backlight)) {
|
|
ret = PTR_ERR(panel->backlight);
|
|
dev_err(dev, "Failed to register backlight (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = rad_init_regulators(panel);
|
|
if (ret)
|
|
return ret;
|
|
|
|
drm_panel_init(&panel->panel, dev, &rad_panel_funcs,
|
|
DRM_MODE_CONNECTOR_DSI);
|
|
dev_set_drvdata(dev, panel);
|
|
|
|
drm_panel_add(&panel->panel);
|
|
|
|
ret = mipi_dsi_attach(dsi);
|
|
if (ret)
|
|
drm_panel_remove(&panel->panel);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void rad_panel_remove(struct mipi_dsi_device *dsi)
|
|
{
|
|
struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
|
|
struct device *dev = &dsi->dev;
|
|
int ret;
|
|
|
|
ret = mipi_dsi_detach(dsi);
|
|
if (ret)
|
|
dev_err(dev, "Failed to detach from host (%d)\n", ret);
|
|
|
|
drm_panel_remove(&rad->panel);
|
|
}
|
|
|
|
static void rad_panel_shutdown(struct mipi_dsi_device *dsi)
|
|
{
|
|
struct rad_panel *rad = mipi_dsi_get_drvdata(dsi);
|
|
|
|
rad_panel_disable(&rad->panel);
|
|
rad_panel_unprepare(&rad->panel);
|
|
}
|
|
|
|
static const struct of_device_id rad_of_match[] = {
|
|
{ .compatible = "raydium,rm67191", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, rad_of_match);
|
|
|
|
static struct mipi_dsi_driver rad_panel_driver = {
|
|
.driver = {
|
|
.name = "panel-raydium-rm67191",
|
|
.of_match_table = rad_of_match,
|
|
},
|
|
.probe = rad_panel_probe,
|
|
.remove = rad_panel_remove,
|
|
.shutdown = rad_panel_shutdown,
|
|
};
|
|
module_mipi_dsi_driver(rad_panel_driver);
|
|
|
|
MODULE_AUTHOR("Robert Chiras <robert.chiras@nxp.com>");
|
|
MODULE_DESCRIPTION("DRM Driver for Raydium RM67191 MIPI DSI panel");
|
|
MODULE_LICENSE("GPL v2");
|