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linuxdebug/drivers/video/fbdev/mmp/fb/mmpfb.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* linux/drivers/video/mmp/fb/mmpfb.c
* Framebuffer driver for Marvell Display controller.
*
* Copyright (C) 2012 Marvell Technology Group Ltd.
* Authors: Zhou Zhu <zzhu3@marvell.com>
*/
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include "mmpfb.h"
static int var_to_pixfmt(struct fb_var_screeninfo *var)
{
/*
* Pseudocolor mode?
*/
if (var->bits_per_pixel == 8)
return PIXFMT_PSEUDOCOLOR;
/*
* Check for YUV422PLANAR.
*/
if (var->bits_per_pixel == 16 && var->red.length == 8 &&
var->green.length == 4 && var->blue.length == 4) {
if (var->green.offset >= var->blue.offset)
return PIXFMT_YUV422P;
else
return PIXFMT_YVU422P;
}
/*
* Check for YUV420PLANAR.
*/
if (var->bits_per_pixel == 12 && var->red.length == 8 &&
var->green.length == 2 && var->blue.length == 2) {
if (var->green.offset >= var->blue.offset)
return PIXFMT_YUV420P;
else
return PIXFMT_YVU420P;
}
/*
* Check for YUV422PACK.
*/
if (var->bits_per_pixel == 16 && var->red.length == 16 &&
var->green.length == 16 && var->blue.length == 16) {
if (var->red.offset == 0)
return PIXFMT_YUYV;
else if (var->green.offset >= var->blue.offset)
return PIXFMT_UYVY;
else
return PIXFMT_VYUY;
}
/*
* Check for 565/1555.
*/
if (var->bits_per_pixel == 16 && var->red.length <= 5 &&
var->green.length <= 6 && var->blue.length <= 5) {
if (var->transp.length == 0) {
if (var->red.offset >= var->blue.offset)
return PIXFMT_RGB565;
else
return PIXFMT_BGR565;
}
}
/*
* Check for 888/A888.
*/
if (var->bits_per_pixel <= 32 && var->red.length <= 8 &&
var->green.length <= 8 && var->blue.length <= 8) {
if (var->bits_per_pixel == 24 && var->transp.length == 0) {
if (var->red.offset >= var->blue.offset)
return PIXFMT_RGB888PACK;
else
return PIXFMT_BGR888PACK;
}
if (var->bits_per_pixel == 32 && var->transp.offset == 24) {
if (var->red.offset >= var->blue.offset)
return PIXFMT_RGBA888;
else
return PIXFMT_BGRA888;
} else {
if (var->red.offset >= var->blue.offset)
return PIXFMT_RGB888UNPACK;
else
return PIXFMT_BGR888UNPACK;
}
}
return -EINVAL;
}
static void pixfmt_to_var(struct fb_var_screeninfo *var, int pix_fmt)
{
switch (pix_fmt) {
case PIXFMT_RGB565:
var->bits_per_pixel = 16;
var->red.offset = 11; var->red.length = 5;
var->green.offset = 5; var->green.length = 6;
var->blue.offset = 0; var->blue.length = 5;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_BGR565:
var->bits_per_pixel = 16;
var->red.offset = 0; var->red.length = 5;
var->green.offset = 5; var->green.length = 6;
var->blue.offset = 11; var->blue.length = 5;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_RGB888UNPACK:
var->bits_per_pixel = 32;
var->red.offset = 16; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_BGR888UNPACK:
var->bits_per_pixel = 32;
var->red.offset = 0; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 16; var->blue.length = 8;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_RGBA888:
var->bits_per_pixel = 32;
var->red.offset = 16; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 24; var->transp.length = 8;
break;
case PIXFMT_BGRA888:
var->bits_per_pixel = 32;
var->red.offset = 0; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 16; var->blue.length = 8;
var->transp.offset = 24; var->transp.length = 8;
break;
case PIXFMT_RGB888PACK:
var->bits_per_pixel = 24;
var->red.offset = 16; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_BGR888PACK:
var->bits_per_pixel = 24;
var->red.offset = 0; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 16; var->blue.length = 8;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_YUV420P:
var->bits_per_pixel = 12;
var->red.offset = 4; var->red.length = 8;
var->green.offset = 2; var->green.length = 2;
var->blue.offset = 0; var->blue.length = 2;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_YVU420P:
var->bits_per_pixel = 12;
var->red.offset = 4; var->red.length = 8;
var->green.offset = 0; var->green.length = 2;
var->blue.offset = 2; var->blue.length = 2;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_YUV422P:
var->bits_per_pixel = 16;
var->red.offset = 8; var->red.length = 8;
var->green.offset = 4; var->green.length = 4;
var->blue.offset = 0; var->blue.length = 4;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_YVU422P:
var->bits_per_pixel = 16;
var->red.offset = 8; var->red.length = 8;
var->green.offset = 0; var->green.length = 4;
var->blue.offset = 4; var->blue.length = 4;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_UYVY:
var->bits_per_pixel = 16;
var->red.offset = 8; var->red.length = 16;
var->green.offset = 4; var->green.length = 16;
var->blue.offset = 0; var->blue.length = 16;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_VYUY:
var->bits_per_pixel = 16;
var->red.offset = 8; var->red.length = 16;
var->green.offset = 0; var->green.length = 16;
var->blue.offset = 4; var->blue.length = 16;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_YUYV:
var->bits_per_pixel = 16;
var->red.offset = 0; var->red.length = 16;
var->green.offset = 4; var->green.length = 16;
var->blue.offset = 8; var->blue.length = 16;
var->transp.offset = 0; var->transp.length = 0;
break;
case PIXFMT_PSEUDOCOLOR:
var->bits_per_pixel = 8;
var->red.offset = 0; var->red.length = 8;
var->green.offset = 0; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 0; var->transp.length = 0;
break;
}
}
/*
* fb framework has its limitation:
* 1. input color/output color is not seprated
* 2. fb_videomode not include output color
* so for fb usage, we keep a output format which is not changed
* then it's added for mmpmode
*/
static void fbmode_to_mmpmode(struct mmp_mode *mode,
struct fb_videomode *videomode, int output_fmt)
{
u64 div_result = 1000000000000ll;
mode->name = videomode->name;
mode->refresh = videomode->refresh;
mode->xres = videomode->xres;
mode->yres = videomode->yres;
do_div(div_result, videomode->pixclock);
mode->pixclock_freq = (u32)div_result;
mode->left_margin = videomode->left_margin;
mode->right_margin = videomode->right_margin;
mode->upper_margin = videomode->upper_margin;
mode->lower_margin = videomode->lower_margin;
mode->hsync_len = videomode->hsync_len;
mode->vsync_len = videomode->vsync_len;
mode->hsync_invert = !!(videomode->sync & FB_SYNC_HOR_HIGH_ACT);
mode->vsync_invert = !!(videomode->sync & FB_SYNC_VERT_HIGH_ACT);
/* no defined flag in fb, use vmode>>3*/
mode->invert_pixclock = !!(videomode->vmode & 8);
mode->pix_fmt_out = output_fmt;
}
static void mmpmode_to_fbmode(struct fb_videomode *videomode,
struct mmp_mode *mode)
{
u64 div_result = 1000000000000ll;
videomode->name = mode->name;
videomode->refresh = mode->refresh;
videomode->xres = mode->xres;
videomode->yres = mode->yres;
do_div(div_result, mode->pixclock_freq);
videomode->pixclock = (u32)div_result;
videomode->left_margin = mode->left_margin;
videomode->right_margin = mode->right_margin;
videomode->upper_margin = mode->upper_margin;
videomode->lower_margin = mode->lower_margin;
videomode->hsync_len = mode->hsync_len;
videomode->vsync_len = mode->vsync_len;
videomode->sync = (mode->hsync_invert ? FB_SYNC_HOR_HIGH_ACT : 0)
| (mode->vsync_invert ? FB_SYNC_VERT_HIGH_ACT : 0);
videomode->vmode = mode->invert_pixclock ? 8 : 0;
}
static int mmpfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct mmpfb_info *fbi = info->par;
if (var->bits_per_pixel == 8)
return -EINVAL;
/*
* Basic geometry sanity checks.
*/
if (var->xoffset + var->xres > var->xres_virtual)
return -EINVAL;
if (var->yoffset + var->yres > var->yres_virtual)
return -EINVAL;
/*
* Check size of framebuffer.
*/
if (var->xres_virtual * var->yres_virtual *
(var->bits_per_pixel >> 3) > fbi->fb_size)
return -EINVAL;
return 0;
}
static unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf)
{
return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset;
}
static u32 to_rgb(u16 red, u16 green, u16 blue)
{
red >>= 8;
green >>= 8;
blue >>= 8;
return (red << 16) | (green << 8) | blue;
}
static int mmpfb_setcolreg(unsigned int regno, unsigned int red,
unsigned int green, unsigned int blue,
unsigned int trans, struct fb_info *info)
{
struct mmpfb_info *fbi = info->par;
u32 val;
if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16) {
val = chan_to_field(red, &info->var.red);
val |= chan_to_field(green, &info->var.green);
val |= chan_to_field(blue , &info->var.blue);
fbi->pseudo_palette[regno] = val;
}
if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR && regno < 256) {
val = to_rgb(red, green, blue);
/* TODO */
}
return 0;
}
static int mmpfb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct mmpfb_info *fbi = info->par;
struct mmp_addr addr;
memset(&addr, 0, sizeof(addr));
addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset)
* var->bits_per_pixel / 8 + fbi->fb_start_dma;
mmp_overlay_set_addr(fbi->overlay, &addr);
return 0;
}
static int var_update(struct fb_info *info)
{
struct mmpfb_info *fbi = info->par;
struct fb_var_screeninfo *var = &info->var;
struct fb_videomode *m;
int pix_fmt;
/* set pix_fmt */
pix_fmt = var_to_pixfmt(var);
if (pix_fmt < 0)
return -EINVAL;
pixfmt_to_var(var, pix_fmt);
fbi->pix_fmt = pix_fmt;
/* set var according to best video mode*/
m = (struct fb_videomode *)fb_match_mode(var, &info->modelist);
if (!m) {
dev_err(fbi->dev, "set par: no match mode, use best mode\n");
m = (struct fb_videomode *)fb_find_best_mode(var,
&info->modelist);
fb_videomode_to_var(var, m);
}
memcpy(&fbi->mode, m, sizeof(struct fb_videomode));
/* fix to 2* yres */
var->yres_virtual = var->yres * 2;
info->fix.visual = (pix_fmt == PIXFMT_PSEUDOCOLOR) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
info->fix.ypanstep = var->yres;
return 0;
}
static void mmpfb_set_win(struct fb_info *info)
{
struct mmpfb_info *fbi = info->par;
struct fb_var_screeninfo *var = &info->var;
struct mmp_win win;
u32 stride;
memset(&win, 0, sizeof(win));
win.xsrc = win.xdst = fbi->mode.xres;
win.ysrc = win.ydst = fbi->mode.yres;
win.pix_fmt = fbi->pix_fmt;
stride = pixfmt_to_stride(win.pix_fmt);
win.pitch[0] = var->xres_virtual * stride;
win.pitch[1] = win.pitch[2] =
(stride == 1) ? (var->xres_virtual >> 1) : 0;
mmp_overlay_set_win(fbi->overlay, &win);
}
static int mmpfb_set_par(struct fb_info *info)
{
struct mmpfb_info *fbi = info->par;
struct fb_var_screeninfo *var = &info->var;
struct mmp_addr addr;
struct mmp_mode mode;
int ret;
ret = var_update(info);
if (ret != 0)
return ret;
/* set window/path according to new videomode */
fbmode_to_mmpmode(&mode, &fbi->mode, fbi->output_fmt);
mmp_path_set_mode(fbi->path, &mode);
/* set window related info */
mmpfb_set_win(info);
/* set address always */
memset(&addr, 0, sizeof(addr));
addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset)
* var->bits_per_pixel / 8 + fbi->fb_start_dma;
mmp_overlay_set_addr(fbi->overlay, &addr);
return 0;
}
static void mmpfb_power(struct mmpfb_info *fbi, int power)
{
struct mmp_addr addr;
struct fb_var_screeninfo *var = &fbi->fb_info->var;
/* for power on, always set address/window again */
if (power) {
/* set window related info */
mmpfb_set_win(fbi->fb_info);
/* set address always */
memset(&addr, 0, sizeof(addr));
addr.phys[0] = fbi->fb_start_dma +
(var->yoffset * var->xres_virtual + var->xoffset)
* var->bits_per_pixel / 8;
mmp_overlay_set_addr(fbi->overlay, &addr);
}
mmp_overlay_set_onoff(fbi->overlay, power);
}
static int mmpfb_blank(int blank, struct fb_info *info)
{
struct mmpfb_info *fbi = info->par;
mmpfb_power(fbi, (blank == FB_BLANK_UNBLANK));
return 0;
}
static const struct fb_ops mmpfb_ops = {
.owner = THIS_MODULE,
.fb_blank = mmpfb_blank,
.fb_check_var = mmpfb_check_var,
.fb_set_par = mmpfb_set_par,
.fb_setcolreg = mmpfb_setcolreg,
.fb_pan_display = mmpfb_pan_display,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
static int modes_setup(struct mmpfb_info *fbi)
{
struct fb_videomode *videomodes;
struct mmp_mode *mmp_modes;
struct fb_info *info = fbi->fb_info;
int videomode_num, i;
/* get videomodes from path */
videomode_num = mmp_path_get_modelist(fbi->path, &mmp_modes);
if (!videomode_num) {
dev_warn(fbi->dev, "can't get videomode num\n");
return 0;
}
/* put videomode list to info structure */
videomodes = kcalloc(videomode_num, sizeof(struct fb_videomode),
GFP_KERNEL);
if (!videomodes)
return -ENOMEM;
for (i = 0; i < videomode_num; i++)
mmpmode_to_fbmode(&videomodes[i], &mmp_modes[i]);
fb_videomode_to_modelist(videomodes, videomode_num, &info->modelist);
/* set videomode[0] as default mode */
memcpy(&fbi->mode, &videomodes[0], sizeof(struct fb_videomode));
fbi->output_fmt = mmp_modes[0].pix_fmt_out;
fb_videomode_to_var(&info->var, &fbi->mode);
mmp_path_set_mode(fbi->path, &mmp_modes[0]);
kfree(videomodes);
return videomode_num;
}
static int fb_info_setup(struct fb_info *info,
struct mmpfb_info *fbi)
{
int ret = 0;
/* Initialise static fb parameters.*/
info->flags = FBINFO_DEFAULT | FBINFO_PARTIAL_PAN_OK |
FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
info->node = -1;
strcpy(info->fix.id, fbi->name);
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.type_aux = 0;
info->fix.xpanstep = 0;
info->fix.ypanstep = info->var.yres;
info->fix.ywrapstep = 0;
info->fix.accel = FB_ACCEL_NONE;
info->fix.smem_start = fbi->fb_start_dma;
info->fix.smem_len = fbi->fb_size;
info->fix.visual = (fbi->pix_fmt == PIXFMT_PSEUDOCOLOR) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
info->fix.line_length = info->var.xres_virtual *
info->var.bits_per_pixel / 8;
info->fbops = &mmpfb_ops;
info->pseudo_palette = fbi->pseudo_palette;
info->screen_buffer = fbi->fb_start;
info->screen_size = fbi->fb_size;
/* For FB framework: Allocate color map and Register framebuffer*/
if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
ret = -ENOMEM;
return ret;
}
static void fb_info_clear(struct fb_info *info)
{
fb_dealloc_cmap(&info->cmap);
}
static int mmpfb_probe(struct platform_device *pdev)
{
struct mmp_buffer_driver_mach_info *mi;
struct fb_info *info;
struct mmpfb_info *fbi;
int ret, modes_num;
mi = pdev->dev.platform_data;
if (mi == NULL) {
dev_err(&pdev->dev, "no platform data defined\n");
return -EINVAL;
}
/* initialize fb */
info = framebuffer_alloc(sizeof(struct mmpfb_info), &pdev->dev);
if (info == NULL)
return -ENOMEM;
fbi = info->par;
/* init fb */
fbi->fb_info = info;
platform_set_drvdata(pdev, fbi);
fbi->dev = &pdev->dev;
fbi->name = mi->name;
fbi->pix_fmt = mi->default_pixfmt;
pixfmt_to_var(&info->var, fbi->pix_fmt);
mutex_init(&fbi->access_ok);
/* get display path by name */
fbi->path = mmp_get_path(mi->path_name);
if (!fbi->path) {
dev_err(&pdev->dev, "can't get the path %s\n", mi->path_name);
ret = -EINVAL;
goto failed_destroy_mutex;
}
dev_info(fbi->dev, "path %s get\n", fbi->path->name);
/* get overlay */
fbi->overlay = mmp_path_get_overlay(fbi->path, mi->overlay_id);
if (!fbi->overlay) {
ret = -EINVAL;
goto failed_destroy_mutex;
}
/* set fetch used */
mmp_overlay_set_fetch(fbi->overlay, mi->dmafetch_id);
modes_num = modes_setup(fbi);
if (modes_num < 0) {
ret = modes_num;
goto failed_destroy_mutex;
}
/*
* if get modes success, means not hotplug panels, use caculated buffer
* or use default size
*/
if (modes_num > 0) {
/* fix to 2* yres */
info->var.yres_virtual = info->var.yres * 2;
/* Allocate framebuffer memory: size = modes xy *4 */
fbi->fb_size = info->var.xres_virtual * info->var.yres_virtual
* info->var.bits_per_pixel / 8;
} else {
fbi->fb_size = MMPFB_DEFAULT_SIZE;
}
fbi->fb_start = dma_alloc_coherent(&pdev->dev, PAGE_ALIGN(fbi->fb_size),
&fbi->fb_start_dma, GFP_KERNEL);
if (fbi->fb_start == NULL) {
dev_err(&pdev->dev, "can't alloc framebuffer\n");
ret = -ENOMEM;
goto failed_destroy_mutex;
}
dev_info(fbi->dev, "fb %dk allocated\n", fbi->fb_size/1024);
/* fb power on */
if (modes_num > 0)
mmpfb_power(fbi, 1);
ret = fb_info_setup(info, fbi);
if (ret < 0)
goto failed_free_buff;
ret = register_framebuffer(info);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to register fb: %d\n", ret);
ret = -ENXIO;
goto failed_clear_info;
}
dev_info(fbi->dev, "loaded to /dev/fb%d <%s>.\n",
info->node, info->fix.id);
#ifdef CONFIG_LOGO
if (fbi->fb_start) {
fb_prepare_logo(info, 0);
fb_show_logo(info, 0);
}
#endif
return 0;
failed_clear_info:
fb_info_clear(info);
failed_free_buff:
dma_free_coherent(&pdev->dev, PAGE_ALIGN(fbi->fb_size), fbi->fb_start,
fbi->fb_start_dma);
failed_destroy_mutex:
mutex_destroy(&fbi->access_ok);
dev_err(fbi->dev, "mmp-fb: frame buffer device init failed\n");
framebuffer_release(info);
return ret;
}
static struct platform_driver mmpfb_driver = {
.driver = {
.name = "mmp-fb",
},
.probe = mmpfb_probe,
};
static int mmpfb_init(void)
{
return platform_driver_register(&mmpfb_driver);
}
module_init(mmpfb_init);
MODULE_AUTHOR("Zhou Zhu <zhou.zhu@marvell.com>");
MODULE_DESCRIPTION("Framebuffer driver for Marvell displays");
MODULE_LICENSE("GPL");
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