mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 21:46:43 +07:00
70f1e28e65
The controller init may be called from a context where the device is runtime suspended, leading to a deadlock, as the controllers only accepts the wakeup command when suspended. Signed-off-by: Heiko Stübner <heiko@sntech.de> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
259 lines
6.8 KiB
C
259 lines
6.8 KiB
C
/*
|
|
* auok190xfb.c -- FB driver for AUO-K1901 controllers
|
|
*
|
|
* Copyright (C) 2011, 2012 Heiko Stuebner <heiko@sntech.de>
|
|
*
|
|
* based on broadsheetfb.c
|
|
*
|
|
* Copyright (C) 2008, Jaya Kumar
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
|
|
*
|
|
* This driver is written to be used with the AUO-K1901 display controller.
|
|
*
|
|
* It is intended to be architecture independent. A board specific driver
|
|
* must be used to perform all the physical IO interactions.
|
|
*
|
|
* The controller supports different update modes:
|
|
* mode0+1 16 step gray (4bit)
|
|
* mode2+3 4 step gray (2bit)
|
|
* mode4+5 2 step gray (1bit)
|
|
* - mode4 is described as "without LUT"
|
|
* mode7 automatic selection of update mode
|
|
*
|
|
* The most interesting difference to the K1900 is the ability to do screen
|
|
* updates in an asynchronous fashion. Where the K1900 needs to wait for the
|
|
* current update to complete, the K1901 can process later updates already.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/list.h>
|
|
#include <linux/firmware.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/pm_runtime.h>
|
|
|
|
#include <video/auo_k190xfb.h>
|
|
|
|
#include "auo_k190x.h"
|
|
|
|
/*
|
|
* AUO-K1901 specific commands
|
|
*/
|
|
|
|
#define AUOK1901_CMD_LUT_INTERFACE 0x0005
|
|
#define AUOK1901_CMD_DMA_START 0x1001
|
|
#define AUOK1901_CMD_CURSOR_START 0x1007
|
|
#define AUOK1901_CMD_CURSOR_STOP AUOK190X_CMD_DATA_STOP
|
|
#define AUOK1901_CMD_DDMA_START 0x1009
|
|
|
|
#define AUOK1901_INIT_GATE_PULSE_LOW (0 << 14)
|
|
#define AUOK1901_INIT_GATE_PULSE_HIGH (1 << 14)
|
|
#define AUOK1901_INIT_SINGLE_GATE (0 << 13)
|
|
#define AUOK1901_INIT_DOUBLE_GATE (1 << 13)
|
|
|
|
/* Bits to pixels
|
|
* Mode 15-12 11-8 7-4 3-0
|
|
* format2 2 T 1 T
|
|
* format3 1 T 2 T
|
|
* format4 T 2 T 1
|
|
* format5 T 1 T 2
|
|
*
|
|
* halftone modes:
|
|
* format6 2 2 1 1
|
|
* format7 1 1 2 2
|
|
*/
|
|
#define AUOK1901_INIT_FORMAT2 (1 << 7)
|
|
#define AUOK1901_INIT_FORMAT3 ((1 << 7) | (1 << 6))
|
|
#define AUOK1901_INIT_FORMAT4 (1 << 8)
|
|
#define AUOK1901_INIT_FORMAT5 ((1 << 8) | (1 << 6))
|
|
#define AUOK1901_INIT_FORMAT6 ((1 << 8) | (1 << 7))
|
|
#define AUOK1901_INIT_FORMAT7 ((1 << 8) | (1 << 7) | (1 << 6))
|
|
|
|
/* res[4] to bit 10
|
|
* res[3-0] to bits 5-2
|
|
*/
|
|
#define AUOK1901_INIT_RESOLUTION(_res) (((_res & (1 << 4)) << 6) \
|
|
| ((_res & 0xf) << 2))
|
|
|
|
/*
|
|
* portrait / landscape orientation in AUOK1901_CMD_DMA_START
|
|
*/
|
|
#define AUOK1901_DMA_ROTATE90(_rot) ((_rot & 1) << 13)
|
|
|
|
/*
|
|
* equivalent to 1 << 11, needs the ~ to have same rotation like K1900
|
|
*/
|
|
#define AUOK1901_DDMA_ROTATE180(_rot) ((~_rot & 2) << 10)
|
|
|
|
static void auok1901_init(struct auok190xfb_par *par)
|
|
{
|
|
struct device *dev = par->info->device;
|
|
struct auok190x_board *board = par->board;
|
|
u16 init_param = 0;
|
|
|
|
pm_runtime_get_sync(dev);
|
|
|
|
init_param |= AUOK190X_INIT_INVERSE_WHITE;
|
|
init_param |= AUOK190X_INIT_FORMAT0;
|
|
init_param |= AUOK1901_INIT_RESOLUTION(par->resolution);
|
|
init_param |= AUOK190X_INIT_SHIFT_LEFT;
|
|
|
|
auok190x_send_cmdargs(par, AUOK190X_CMD_INIT, 1, &init_param);
|
|
|
|
/* let the controller finish */
|
|
board->wait_for_rdy(par);
|
|
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_put_autosuspend(dev);
|
|
}
|
|
|
|
static void auok1901_update_region(struct auok190xfb_par *par, int mode,
|
|
u16 y1, u16 y2)
|
|
{
|
|
struct device *dev = par->info->device;
|
|
unsigned char *buf = (unsigned char *)par->info->screen_base;
|
|
int xres = par->info->var.xres;
|
|
int line_length = par->info->fix.line_length;
|
|
u16 args[5];
|
|
|
|
pm_runtime_get_sync(dev);
|
|
|
|
mutex_lock(&(par->io_lock));
|
|
|
|
/* y1 and y2 must be a multiple of 2 so drop the lowest bit */
|
|
y1 &= 0xfffe;
|
|
y2 &= 0xfffe;
|
|
|
|
dev_dbg(dev, "update (x,y,w,h,mode)=(%d,%d,%d,%d,%d)\n",
|
|
1, y1+1, xres, y2-y1, mode);
|
|
|
|
/* K1901: first transfer the region data */
|
|
args[0] = AUOK1901_DMA_ROTATE90(par->rotation) | 1;
|
|
args[1] = y1 + 1;
|
|
args[2] = xres;
|
|
args[3] = y2 - y1;
|
|
buf += y1 * line_length;
|
|
auok190x_send_cmdargs_pixels_nowait(par, AUOK1901_CMD_DMA_START, 4,
|
|
args, ((y2 - y1) * line_length)/2,
|
|
(u16 *) buf);
|
|
auok190x_send_command_nowait(par, AUOK190X_CMD_DATA_STOP);
|
|
|
|
/* K1901: second tell the controller to update the region with mode */
|
|
args[0] = mode | AUOK1901_DDMA_ROTATE180(par->rotation);
|
|
args[1] = 1;
|
|
args[2] = y1 + 1;
|
|
args[3] = xres;
|
|
args[4] = y2 - y1;
|
|
auok190x_send_cmdargs_nowait(par, AUOK1901_CMD_DDMA_START, 5, args);
|
|
|
|
par->update_cnt++;
|
|
|
|
mutex_unlock(&(par->io_lock));
|
|
|
|
pm_runtime_mark_last_busy(dev);
|
|
pm_runtime_put_autosuspend(dev);
|
|
}
|
|
|
|
static void auok1901fb_dpy_update_pages(struct auok190xfb_par *par,
|
|
u16 y1, u16 y2)
|
|
{
|
|
int mode;
|
|
|
|
if (par->update_mode < 0) {
|
|
mode = AUOK190X_UPDATE_MODE(1);
|
|
par->last_mode = -1;
|
|
} else {
|
|
mode = AUOK190X_UPDATE_MODE(par->update_mode);
|
|
par->last_mode = par->update_mode;
|
|
}
|
|
|
|
if (par->flash)
|
|
mode |= AUOK190X_UPDATE_NONFLASH;
|
|
|
|
auok1901_update_region(par, mode, y1, y2);
|
|
}
|
|
|
|
static void auok1901fb_dpy_update(struct auok190xfb_par *par)
|
|
{
|
|
int mode;
|
|
|
|
/* When doing full updates, wait for the controller to be ready
|
|
* This will hopefully catch some hangs of the K1901
|
|
*/
|
|
par->board->wait_for_rdy(par);
|
|
|
|
if (par->update_mode < 0) {
|
|
mode = AUOK190X_UPDATE_MODE(0);
|
|
par->last_mode = -1;
|
|
} else {
|
|
mode = AUOK190X_UPDATE_MODE(par->update_mode);
|
|
par->last_mode = par->update_mode;
|
|
}
|
|
|
|
if (par->flash)
|
|
mode |= AUOK190X_UPDATE_NONFLASH;
|
|
|
|
auok1901_update_region(par, mode, 0, par->info->var.yres);
|
|
par->update_cnt = 0;
|
|
}
|
|
|
|
static bool auok1901fb_need_refresh(struct auok190xfb_par *par)
|
|
{
|
|
return (par->update_cnt > 10);
|
|
}
|
|
|
|
static int auok1901fb_probe(struct platform_device *pdev)
|
|
{
|
|
struct auok190x_init_data init;
|
|
struct auok190x_board *board;
|
|
|
|
/* pick up board specific routines */
|
|
board = pdev->dev.platform_data;
|
|
if (!board)
|
|
return -EINVAL;
|
|
|
|
/* fill temporary init struct for common init */
|
|
init.id = "auo_k1901fb";
|
|
init.board = board;
|
|
init.update_partial = auok1901fb_dpy_update_pages;
|
|
init.update_all = auok1901fb_dpy_update;
|
|
init.need_refresh = auok1901fb_need_refresh;
|
|
init.init = auok1901_init;
|
|
|
|
return auok190x_common_probe(pdev, &init);
|
|
}
|
|
|
|
static int auok1901fb_remove(struct platform_device *pdev)
|
|
{
|
|
return auok190x_common_remove(pdev);
|
|
}
|
|
|
|
static struct platform_driver auok1901fb_driver = {
|
|
.probe = auok1901fb_probe,
|
|
.remove = auok1901fb_remove,
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "auo_k1901fb",
|
|
.pm = &auok190x_pm,
|
|
},
|
|
};
|
|
module_platform_driver(auok1901fb_driver);
|
|
|
|
MODULE_DESCRIPTION("framebuffer driver for the AUO-K1901 EPD controller");
|
|
MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
|
|
MODULE_LICENSE("GPL");
|