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tegrakernel/kernel/kernel-4.9/drivers/video/fbdev/omap/omapfb_main.c

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initial commit tegra kernel 32.6.1
2022-02-16 09:13:02 -06:00
/*
* Framebuffer driver for TI OMAP boards
*
* Copyright (C) 2004 Nokia Corporation
* Author: Imre Deak <imre.deak@nokia.com>
*
* Acknowledgements:
* Alex McMains <aam@ridgerun.com> - Original driver
* Juha Yrjola <juha.yrjola@nokia.com> - Original driver and improvements
* Dirk Behme <dirk.behme@de.bosch.com> - changes for 2.6 kernel API
* Texas Instruments - H3 support
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/platform_device.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/omap-dma.h>
#include <mach/hardware.h>
#include "omapfb.h"
#include "lcdc.h"
#define MODULE_NAME "omapfb"
static unsigned int def_accel;
static unsigned long def_vram[OMAPFB_PLANE_NUM];
static unsigned int def_vram_cnt;
static unsigned long def_vxres;
static unsigned long def_vyres;
static unsigned int def_rotate;
static unsigned int def_mirror;
#ifdef CONFIG_FB_OMAP_MANUAL_UPDATE
static bool manual_update = 1;
#else
static bool manual_update;
#endif
static struct platform_device *fbdev_pdev;
static struct lcd_panel *fbdev_panel;
static struct omapfb_device *omapfb_dev;
struct caps_table_struct {
unsigned long flag;
const char *name;
};
static struct caps_table_struct ctrl_caps[] = {
{ OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
{ OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
{ OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
{ OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
{ OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
{ OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
{ OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
{ OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" },
{ OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
};
static struct caps_table_struct color_caps[] = {
{ 1 << OMAPFB_COLOR_RGB565, "RGB565", },
{ 1 << OMAPFB_COLOR_YUV422, "YUV422", },
{ 1 << OMAPFB_COLOR_YUV420, "YUV420", },
{ 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
{ 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
{ 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
{ 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
{ 1 << OMAPFB_COLOR_RGB444, "RGB444", },
{ 1 << OMAPFB_COLOR_YUY422, "YUY422", },
};
static void omapdss_release(struct device *dev)
{
}
/* dummy device for clocks */
static struct platform_device omapdss_device = {
.name = "omapdss_dss",
.id = -1,
.dev = {
.release = omapdss_release,
},
};
/*
* ---------------------------------------------------------------------------
* LCD panel
* ---------------------------------------------------------------------------
*/
extern struct lcd_ctrl hwa742_ctrl;
static const struct lcd_ctrl *ctrls[] = {
&omap1_int_ctrl,
#ifdef CONFIG_FB_OMAP_LCDC_HWA742
&hwa742_ctrl,
#endif
};
#ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
extern struct lcd_ctrl_extif omap1_ext_if;
#endif
static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
{
mutex_lock(&fbdev->rqueue_mutex);
}
static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
{
mutex_unlock(&fbdev->rqueue_mutex);
}
/*
* ---------------------------------------------------------------------------
* LCD controller and LCD DMA
* ---------------------------------------------------------------------------
*/
/*
* Allocate resources needed for LCD controller and LCD DMA operations. Video
* memory is allocated from system memory according to the virtual display
* size, except if a bigger memory size is specified explicitly as a kernel
* parameter.
*/
static int ctrl_init(struct omapfb_device *fbdev)
{
int r;
int i;
/* kernel/module vram parameters override boot tags/board config */
if (def_vram_cnt) {
for (i = 0; i < def_vram_cnt; i++)
fbdev->mem_desc.region[i].size =
PAGE_ALIGN(def_vram[i]);
fbdev->mem_desc.region_cnt = i;
}
if (!fbdev->mem_desc.region_cnt) {
struct lcd_panel *panel = fbdev->panel;
int def_size;
int bpp = panel->bpp;
/* 12 bpp is packed in 16 bits */
if (bpp == 12)
bpp = 16;
def_size = def_vxres * def_vyres * bpp / 8;
fbdev->mem_desc.region_cnt = 1;
fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
}
r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
if (r < 0) {
dev_err(fbdev->dev, "controller initialization failed (%d)\n",
r);
return r;
}
#ifdef DEBUG
for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
i,
fbdev->mem_desc.region[i].paddr,
fbdev->mem_desc.region[i].vaddr,
fbdev->mem_desc.region[i].size);
}
#endif
return 0;
}
static void ctrl_cleanup(struct omapfb_device *fbdev)
{
fbdev->ctrl->cleanup();
}
/* Must be called with fbdev->rqueue_mutex held. */
static int ctrl_change_mode(struct fb_info *fbi)
{
int r;
unsigned long offset;
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
struct fb_var_screeninfo *var = &fbi->var;
offset = var->yoffset * fbi->fix.line_length +
var->xoffset * var->bits_per_pixel / 8;
if (fbdev->ctrl->sync)
fbdev->ctrl->sync();
r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
offset, var->xres_virtual,
plane->info.pos_x, plane->info.pos_y,
var->xres, var->yres, plane->color_mode);
if (r < 0)
return r;
if (fbdev->ctrl->set_rotate != NULL) {
r = fbdev->ctrl->set_rotate(var->rotate);
if (r < 0)
return r;
}
if (fbdev->ctrl->set_scale != NULL)
r = fbdev->ctrl->set_scale(plane->idx,
var->xres, var->yres,
plane->info.out_width,
plane->info.out_height);
return r;
}
/*
* ---------------------------------------------------------------------------
* fbdev framework callbacks and the ioctl interface
* ---------------------------------------------------------------------------
*/
/* Called each time the omapfb device is opened */
static int omapfb_open(struct fb_info *info, int user)
{
return 0;
}
static void omapfb_sync(struct fb_info *info);
/* Called when the omapfb device is closed. We make sure that any pending
* gfx DMA operations are ended, before we return. */
static int omapfb_release(struct fb_info *info, int user)
{
omapfb_sync(info);
return 0;
}
/* Store a single color palette entry into a pseudo palette or the hardware
* palette if one is available. For now we support only 16bpp and thus store
* the entry only to the pseudo palette.
*/
static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
u_int blue, u_int transp, int update_hw_pal)
{
struct omapfb_plane_struct *plane = info->par;
struct omapfb_device *fbdev = plane->fbdev;
struct fb_var_screeninfo *var = &info->var;
int r = 0;
switch (plane->color_mode) {
case OMAPFB_COLOR_YUV422:
case OMAPFB_COLOR_YUV420:
case OMAPFB_COLOR_YUY422:
r = -EINVAL;
break;
case OMAPFB_COLOR_CLUT_8BPP:
case OMAPFB_COLOR_CLUT_4BPP:
case OMAPFB_COLOR_CLUT_2BPP:
case OMAPFB_COLOR_CLUT_1BPP:
if (fbdev->ctrl->setcolreg)
r = fbdev->ctrl->setcolreg(regno, red, green, blue,
transp, update_hw_pal);
/* Fallthrough */
case OMAPFB_COLOR_RGB565:
case OMAPFB_COLOR_RGB444:
if (r != 0)
break;
if (regno < 16) {
u16 pal;
pal = ((red >> (16 - var->red.length)) <<
var->red.offset) |
((green >> (16 - var->green.length)) <<
var->green.offset) |
(blue >> (16 - var->blue.length));
((u32 *)(info->pseudo_palette))[regno] = pal;
}
break;
default:
BUG();
}
return r;
}
static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
return _setcolreg(info, regno, red, green, blue, transp, 1);
}
static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
{
int count, index, r;
u16 *red, *green, *blue, *transp;
u16 trans = 0xffff;
red = cmap->red;
green = cmap->green;
blue = cmap->blue;
transp = cmap->transp;
index = cmap->start;
for (count = 0; count < cmap->len; count++) {
if (transp)
trans = *transp++;
r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
count == cmap->len - 1);
if (r != 0)
return r;
}
return 0;
}
static int omapfb_update_full_screen(struct fb_info *fbi);
static int omapfb_blank(int blank, struct fb_info *fbi)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
int do_update = 0;
int r = 0;
omapfb_rqueue_lock(fbdev);
switch (blank) {
case FB_BLANK_UNBLANK:
if (fbdev->state == OMAPFB_SUSPENDED) {
if (fbdev->ctrl->resume)
fbdev->ctrl->resume();
fbdev->panel->enable(fbdev->panel);
fbdev->state = OMAPFB_ACTIVE;
if (fbdev->ctrl->get_update_mode() ==
OMAPFB_MANUAL_UPDATE)
do_update = 1;
}
break;
case FB_BLANK_POWERDOWN:
if (fbdev->state == OMAPFB_ACTIVE) {
fbdev->panel->disable(fbdev->panel);
if (fbdev->ctrl->suspend)
fbdev->ctrl->suspend();
fbdev->state = OMAPFB_SUSPENDED;
}
break;
default:
r = -EINVAL;
}
omapfb_rqueue_unlock(fbdev);
if (r == 0 && do_update)
r = omapfb_update_full_screen(fbi);
return r;
}
static void omapfb_sync(struct fb_info *fbi)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
omapfb_rqueue_lock(fbdev);
if (fbdev->ctrl->sync)
fbdev->ctrl->sync();
omapfb_rqueue_unlock(fbdev);
}
/*
* Set fb_info.fix fields and also updates fbdev.
* When calling this fb_info.var must be set up already.
*/
static void set_fb_fix(struct fb_info *fbi, int from_init)
{
struct fb_fix_screeninfo *fix = &fbi->fix;
struct fb_var_screeninfo *var = &fbi->var;
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_mem_region *rg;
int bpp;
rg = &plane->fbdev->mem_desc.region[plane->idx];
fbi->screen_base = rg->vaddr;
if (!from_init) {
mutex_lock(&fbi->mm_lock);
fix->smem_start = rg->paddr;
fix->smem_len = rg->size;
mutex_unlock(&fbi->mm_lock);
} else {
fix->smem_start = rg->paddr;
fix->smem_len = rg->size;
}
fix->type = FB_TYPE_PACKED_PIXELS;
bpp = var->bits_per_pixel;
if (var->nonstd)
fix->visual = FB_VISUAL_PSEUDOCOLOR;
else switch (var->bits_per_pixel) {
case 16:
case 12:
fix->visual = FB_VISUAL_TRUECOLOR;
/* 12bpp is stored in 16 bits */
bpp = 16;
break;
case 1:
case 2:
case 4:
case 8:
fix->visual = FB_VISUAL_PSEUDOCOLOR;
break;
}
fix->accel = FB_ACCEL_OMAP1610;
fix->line_length = var->xres_virtual * bpp / 8;
}
static int set_color_mode(struct omapfb_plane_struct *plane,
struct fb_var_screeninfo *var)
{
switch (var->nonstd) {
case 0:
break;
case OMAPFB_COLOR_YUV422:
var->bits_per_pixel = 16;
plane->color_mode = var->nonstd;
return 0;
case OMAPFB_COLOR_YUV420:
var->bits_per_pixel = 12;
plane->color_mode = var->nonstd;
return 0;
case OMAPFB_COLOR_YUY422:
var->bits_per_pixel = 16;
plane->color_mode = var->nonstd;
return 0;
default:
return -EINVAL;
}
switch (var->bits_per_pixel) {
case 1:
plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
return 0;
case 2:
plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
return 0;
case 4:
plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
return 0;
case 8:
plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
return 0;
case 12:
var->bits_per_pixel = 16;
case 16:
if (plane->fbdev->panel->bpp == 12)
plane->color_mode = OMAPFB_COLOR_RGB444;
else
plane->color_mode = OMAPFB_COLOR_RGB565;
return 0;
default:
return -EINVAL;
}
}
/*
* Check the values in var against our capabilities and in case of out of
* bound values try to adjust them.
*/
static int set_fb_var(struct fb_info *fbi,
struct fb_var_screeninfo *var)
{
int bpp;
unsigned long max_frame_size;
unsigned long line_size;
int xres_min, xres_max;
int yres_min, yres_max;
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
struct lcd_panel *panel = fbdev->panel;
if (set_color_mode(plane, var) < 0)
return -EINVAL;
bpp = var->bits_per_pixel;
if (plane->color_mode == OMAPFB_COLOR_RGB444)
bpp = 16;
switch (var->rotate) {
case 0:
case 180:
xres_min = OMAPFB_PLANE_XRES_MIN;
xres_max = panel->x_res;
yres_min = OMAPFB_PLANE_YRES_MIN;
yres_max = panel->y_res;
if (cpu_is_omap15xx()) {
var->xres = panel->x_res;
var->yres = panel->y_res;
}
break;
case 90:
case 270:
xres_min = OMAPFB_PLANE_YRES_MIN;
xres_max = panel->y_res;
yres_min = OMAPFB_PLANE_XRES_MIN;
yres_max = panel->x_res;
if (cpu_is_omap15xx()) {
var->xres = panel->y_res;
var->yres = panel->x_res;
}
break;
default:
return -EINVAL;
}
if (var->xres < xres_min)
var->xres = xres_min;
if (var->yres < yres_min)
var->yres = yres_min;
if (var->xres > xres_max)
var->xres = xres_max;
if (var->yres > yres_max)
var->yres = yres_max;
if (var->xres_virtual < var->xres)
var->xres_virtual = var->xres;
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
max_frame_size = fbdev->mem_desc.region[plane->idx].size;
line_size = var->xres_virtual * bpp / 8;
if (line_size * var->yres_virtual > max_frame_size) {
/* Try to keep yres_virtual first */
line_size = max_frame_size / var->yres_virtual;
var->xres_virtual = line_size * 8 / bpp;
if (var->xres_virtual < var->xres) {
/* Still doesn't fit. Shrink yres_virtual too */
var->xres_virtual = var->xres;
line_size = var->xres * bpp / 8;
var->yres_virtual = max_frame_size / line_size;
}
/* Recheck this, as the virtual size changed. */
if (var->xres_virtual < var->xres)
var->xres = var->xres_virtual;
if (var->yres_virtual < var->yres)
var->yres = var->yres_virtual;
if (var->xres < xres_min || var->yres < yres_min)
return -EINVAL;
}
if (var->xres + var->xoffset > var->xres_virtual)
var->xoffset = var->xres_virtual - var->xres;
if (var->yres + var->yoffset > var->yres_virtual)
var->yoffset = var->yres_virtual - var->yres;
if (plane->color_mode == OMAPFB_COLOR_RGB444) {
var->red.offset = 8; var->red.length = 4;
var->red.msb_right = 0;
var->green.offset = 4; var->green.length = 4;
var->green.msb_right = 0;
var->blue.offset = 0; var->blue.length = 4;
var->blue.msb_right = 0;
} else {
var->red.offset = 11; var->red.length = 5;
var->red.msb_right = 0;
var->green.offset = 5; var->green.length = 6;
var->green.msb_right = 0;
var->blue.offset = 0; var->blue.length = 5;
var->blue.msb_right = 0;
}
var->height = -1;
var->width = -1;
var->grayscale = 0;
/* pixclock in ps, the rest in pixclock */
var->pixclock = 10000000 / (panel->pixel_clock / 100);
var->left_margin = panel->hfp;
var->right_margin = panel->hbp;
var->upper_margin = panel->vfp;
var->lower_margin = panel->vbp;
var->hsync_len = panel->hsw;
var->vsync_len = panel->vsw;
/* TODO: get these from panel->config */
var->vmode = FB_VMODE_NONINTERLACED;
var->sync = 0;
return 0;
}
/*
* Set new x,y offsets in the virtual display for the visible area and switch
* to the new mode.
*/
static int omapfb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *fbi)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
int r = 0;
omapfb_rqueue_lock(fbdev);
if (var->xoffset != fbi->var.xoffset ||
var->yoffset != fbi->var.yoffset) {
struct fb_var_screeninfo *new_var = &fbdev->new_var;
memcpy(new_var, &fbi->var, sizeof(*new_var));
new_var->xoffset = var->xoffset;
new_var->yoffset = var->yoffset;
if (set_fb_var(fbi, new_var))
r = -EINVAL;
else {
memcpy(&fbi->var, new_var, sizeof(*new_var));
ctrl_change_mode(fbi);
}
}
omapfb_rqueue_unlock(fbdev);
return r;
}
/* Set mirror to vertical axis and switch to the new mode. */
static int omapfb_mirror(struct fb_info *fbi, int mirror)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
int r = 0;
omapfb_rqueue_lock(fbdev);
mirror = mirror ? 1 : 0;
if (cpu_is_omap15xx())
r = -EINVAL;
else if (mirror != plane->info.mirror) {
plane->info.mirror = mirror;
r = ctrl_change_mode(fbi);
}
omapfb_rqueue_unlock(fbdev);
return r;
}
/*
* Check values in var, try to adjust them in case of out of bound values if
* possible, or return error.
*/
static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
int r;
omapfb_rqueue_lock(fbdev);
if (fbdev->ctrl->sync != NULL)
fbdev->ctrl->sync();
r = set_fb_var(fbi, var);
omapfb_rqueue_unlock(fbdev);
return r;
}
/*
* Switch to a new mode. The parameters for it has been check already by
* omapfb_check_var.
*/
static int omapfb_set_par(struct fb_info *fbi)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
int r = 0;
omapfb_rqueue_lock(fbdev);
set_fb_fix(fbi, 0);
r = ctrl_change_mode(fbi);
omapfb_rqueue_unlock(fbdev);
return r;
}
int omapfb_update_window_async(struct fb_info *fbi,
struct omapfb_update_window *win,
void (*callback)(void *),
void *callback_data)
{
int xres, yres;
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
struct fb_var_screeninfo *var = &fbi->var;
switch (var->rotate) {
case 0:
case 180:
xres = fbdev->panel->x_res;
yres = fbdev->panel->y_res;
break;
case 90:
case 270:
xres = fbdev->panel->y_res;
yres = fbdev->panel->x_res;
break;
default:
return -EINVAL;
}
if (win->x >= xres || win->y >= yres ||
win->out_x > xres || win->out_y > yres)
return -EINVAL;
if (!fbdev->ctrl->update_window ||
fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
return -ENODEV;
if (win->x + win->width > xres)
win->width = xres - win->x;
if (win->y + win->height > yres)
win->height = yres - win->y;
if (win->out_x + win->out_width > xres)
win->out_width = xres - win->out_x;
if (win->out_y + win->out_height > yres)
win->out_height = yres - win->out_y;
if (!win->width || !win->height || !win->out_width || !win->out_height)
return 0;
return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
}
EXPORT_SYMBOL(omapfb_update_window_async);
static int omapfb_update_win(struct fb_info *fbi,
struct omapfb_update_window *win)
{
struct omapfb_plane_struct *plane = fbi->par;
int ret;
omapfb_rqueue_lock(plane->fbdev);
ret = omapfb_update_window_async(fbi, win, NULL, NULL);
omapfb_rqueue_unlock(plane->fbdev);
return ret;
}
static int omapfb_update_full_screen(struct fb_info *fbi)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
struct omapfb_update_window win;
int r;
if (!fbdev->ctrl->update_window ||
fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
return -ENODEV;
win.x = 0;
win.y = 0;
win.width = fbi->var.xres;
win.height = fbi->var.yres;
win.out_x = 0;
win.out_y = 0;
win.out_width = fbi->var.xres;
win.out_height = fbi->var.yres;
win.format = 0;
omapfb_rqueue_lock(fbdev);
r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
omapfb_rqueue_unlock(fbdev);
return r;
}
static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
struct lcd_panel *panel = fbdev->panel;
struct omapfb_plane_info old_info;
int r = 0;
if (pi->pos_x + pi->out_width > panel->x_res ||
pi->pos_y + pi->out_height > panel->y_res)
return -EINVAL;
omapfb_rqueue_lock(fbdev);
if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
/*
* This plane's memory was freed, can't enable it
* until it's reallocated.
*/
r = -EINVAL;
goto out;
}
old_info = plane->info;
plane->info = *pi;
if (pi->enabled) {
r = ctrl_change_mode(fbi);
if (r < 0) {
plane->info = old_info;
goto out;
}
}
r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
if (r < 0) {
plane->info = old_info;
goto out;
}
out:
omapfb_rqueue_unlock(fbdev);
return r;
}
static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
{
struct omapfb_plane_struct *plane = fbi->par;
*pi = plane->info;
return 0;
}
static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
size_t size;
int r = 0;
if (fbdev->ctrl->setup_mem == NULL)
return -ENODEV;
if (mi->type != OMAPFB_MEMTYPE_SDRAM)
return -EINVAL;
size = PAGE_ALIGN(mi->size);
omapfb_rqueue_lock(fbdev);
if (plane->info.enabled) {
r = -EBUSY;
goto out;
}
if (rg->size != size || rg->type != mi->type) {
struct fb_var_screeninfo *new_var = &fbdev->new_var;
unsigned long old_size = rg->size;
u8 old_type = rg->type;
unsigned long paddr;
rg->size = size;
rg->type = mi->type;
/*
* size == 0 is a special case, for which we
* don't check / adjust the screen parameters.
* This isn't a problem since the plane can't
* be reenabled unless its size is > 0.
*/
if (old_size != size && size) {
if (size) {
memcpy(new_var, &fbi->var, sizeof(*new_var));
r = set_fb_var(fbi, new_var);
if (r < 0)
goto out;
}
}
if (fbdev->ctrl->sync)
fbdev->ctrl->sync();
r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
if (r < 0) {
/* Revert changes. */
rg->size = old_size;
rg->type = old_type;
goto out;
}
rg->paddr = paddr;
if (old_size != size) {
if (size) {
memcpy(&fbi->var, new_var, sizeof(fbi->var));
set_fb_fix(fbi, 0);
} else {
/*
* Set these explicitly to indicate that the
* plane memory is dealloce'd, the other
* screen parameters in var / fix are invalid.
*/
mutex_lock(&fbi->mm_lock);
fbi->fix.smem_start = 0;
fbi->fix.smem_len = 0;
mutex_unlock(&fbi->mm_lock);
}
}
}
out:
omapfb_rqueue_unlock(fbdev);
return r;
}
static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
struct omapfb_mem_region *rg;
rg = &fbdev->mem_desc.region[plane->idx];
memset(mi, 0, sizeof(*mi));
mi->size = rg->size;
mi->type = rg->type;
return 0;
}
static int omapfb_set_color_key(struct omapfb_device *fbdev,
struct omapfb_color_key *ck)
{
int r;
if (!fbdev->ctrl->set_color_key)
return -ENODEV;
omapfb_rqueue_lock(fbdev);
r = fbdev->ctrl->set_color_key(ck);
omapfb_rqueue_unlock(fbdev);
return r;
}
static int omapfb_get_color_key(struct omapfb_device *fbdev,
struct omapfb_color_key *ck)
{
int r;
if (!fbdev->ctrl->get_color_key)
return -ENODEV;
omapfb_rqueue_lock(fbdev);
r = fbdev->ctrl->get_color_key(ck);
omapfb_rqueue_unlock(fbdev);
return r;
}
static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
static int notifier_inited;
static void omapfb_init_notifier(void)
{
int i;
for (i = 0; i < OMAPFB_PLANE_NUM; i++)
BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
}
int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
omapfb_notifier_callback_t callback,
void *callback_data)
{
int r;
if ((unsigned)omapfb_nb->plane_idx >= OMAPFB_PLANE_NUM)
return -EINVAL;
if (!notifier_inited) {
omapfb_init_notifier();
notifier_inited = 1;
}
omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
unsigned long, void *))callback;
omapfb_nb->data = callback_data;
r = blocking_notifier_chain_register(
&omapfb_client_list[omapfb_nb->plane_idx],
&omapfb_nb->nb);
if (r)
return r;
if (omapfb_dev != NULL &&
omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
omapfb_dev->ctrl->bind_client(omapfb_nb);
}
return 0;
}
EXPORT_SYMBOL(omapfb_register_client);
int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
{
return blocking_notifier_chain_unregister(
&omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
}
EXPORT_SYMBOL(omapfb_unregister_client);
void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
{
int i;
if (!notifier_inited)
/* no client registered yet */
return;
for (i = 0; i < OMAPFB_PLANE_NUM; i++)
blocking_notifier_call_chain(&omapfb_client_list[i], event,
fbdev->fb_info[i]);
}
EXPORT_SYMBOL(omapfb_notify_clients);
static int omapfb_set_update_mode(struct omapfb_device *fbdev,
enum omapfb_update_mode mode)
{
int r;
omapfb_rqueue_lock(fbdev);
r = fbdev->ctrl->set_update_mode(mode);
omapfb_rqueue_unlock(fbdev);
return r;
}
static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
{
int r;
omapfb_rqueue_lock(fbdev);
r = fbdev->ctrl->get_update_mode();
omapfb_rqueue_unlock(fbdev);
return r;
}
static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
struct omapfb_caps *caps)
{
memset(caps, 0, sizeof(*caps));
fbdev->ctrl->get_caps(plane, caps);
caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
}
/* For lcd testing */
void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
{
omapfb_rqueue_lock(fbdev);
*(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
struct omapfb_update_window win;
memset(&win, 0, sizeof(win));
win.width = 2;
win.height = 2;
win.out_width = 2;
win.out_height = 2;
fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
}
omapfb_rqueue_unlock(fbdev);
}
EXPORT_SYMBOL(omapfb_write_first_pixel);
/*
* Ioctl interface. Part of the kernel mode frame buffer API is duplicated
* here to be accessible by user mode code.
*/
static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
unsigned long arg)
{
struct omapfb_plane_struct *plane = fbi->par;
struct omapfb_device *fbdev = plane->fbdev;
struct fb_ops *ops = fbi->fbops;
union {
struct omapfb_update_window update_window;
struct omapfb_plane_info plane_info;
struct omapfb_mem_info mem_info;
struct omapfb_color_key color_key;
enum omapfb_update_mode update_mode;
struct omapfb_caps caps;
unsigned int mirror;
int plane_out;
int enable_plane;
} p;
int r = 0;
BUG_ON(!ops);
switch (cmd) {
case OMAPFB_MIRROR:
if (get_user(p.mirror, (int __user *)arg))
r = -EFAULT;
else
omapfb_mirror(fbi, p.mirror);
break;
case OMAPFB_SYNC_GFX:
omapfb_sync(fbi);
break;
case OMAPFB_VSYNC:
break;
case OMAPFB_SET_UPDATE_MODE:
if (get_user(p.update_mode, (int __user *)arg))
r = -EFAULT;
else
r = omapfb_set_update_mode(fbdev, p.update_mode);
break;
case OMAPFB_GET_UPDATE_MODE:
p.update_mode = omapfb_get_update_mode(fbdev);
if (put_user(p.update_mode,
(enum omapfb_update_mode __user *)arg))
r = -EFAULT;
break;
case OMAPFB_UPDATE_WINDOW_OLD:
if (copy_from_user(&p.update_window, (void __user *)arg,
sizeof(struct omapfb_update_window_old)))
r = -EFAULT;
else {
struct omapfb_update_window *u = &p.update_window;
u->out_x = u->x;
u->out_y = u->y;
u->out_width = u->width;
u->out_height = u->height;
memset(u->reserved, 0, sizeof(u->reserved));
r = omapfb_update_win(fbi, u);
}
break;
case OMAPFB_UPDATE_WINDOW:
if (copy_from_user(&p.update_window, (void __user *)arg,
sizeof(p.update_window)))
r = -EFAULT;
else
r = omapfb_update_win(fbi, &p.update_window);
break;
case OMAPFB_SETUP_PLANE:
if (copy_from_user(&p.plane_info, (void __user *)arg,
sizeof(p.plane_info)))
r = -EFAULT;
else
r = omapfb_setup_plane(fbi, &p.plane_info);
break;
case OMAPFB_QUERY_PLANE:
if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
break;
if (copy_to_user((void __user *)arg, &p.plane_info,
sizeof(p.plane_info)))
r = -EFAULT;
break;
case OMAPFB_SETUP_MEM:
if (copy_from_user(&p.mem_info, (void __user *)arg,
sizeof(p.mem_info)))
r = -EFAULT;
else
r = omapfb_setup_mem(fbi, &p.mem_info);
break;
case OMAPFB_QUERY_MEM:
if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
break;
if (copy_to_user((void __user *)arg, &p.mem_info,
sizeof(p.mem_info)))
r = -EFAULT;
break;
case OMAPFB_SET_COLOR_KEY:
if (copy_from_user(&p.color_key, (void __user *)arg,
sizeof(p.color_key)))
r = -EFAULT;
else
r = omapfb_set_color_key(fbdev, &p.color_key);
break;
case OMAPFB_GET_COLOR_KEY:
if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
break;
if (copy_to_user((void __user *)arg, &p.color_key,
sizeof(p.color_key)))
r = -EFAULT;
break;
case OMAPFB_GET_CAPS:
omapfb_get_caps(fbdev, plane->idx, &p.caps);
if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
r = -EFAULT;
break;
case OMAPFB_LCD_TEST:
{
int test_num;
if (get_user(test_num, (int __user *)arg)) {
r = -EFAULT;
break;
}
if (!fbdev->panel->run_test) {
r = -EINVAL;
break;
}
r = fbdev->panel->run_test(fbdev->panel, test_num);
break;
}
case OMAPFB_CTRL_TEST:
{
int test_num;
if (get_user(test_num, (int __user *)arg)) {
r = -EFAULT;
break;
}
if (!fbdev->ctrl->run_test) {
r = -EINVAL;
break;
}
r = fbdev->ctrl->run_test(test_num);
break;
}
default:
r = -EINVAL;
}
return r;
}
static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct omapfb_plane_struct *plane = info->par;
struct omapfb_device *fbdev = plane->fbdev;
int r;
omapfb_rqueue_lock(fbdev);
r = fbdev->ctrl->mmap(info, vma);
omapfb_rqueue_unlock(fbdev);
return r;
}
/*
* Callback table for the frame buffer framework. Some of these pointers
* will be changed according to the current setting of fb_info->accel_flags.
*/
static struct fb_ops omapfb_ops = {
.owner = THIS_MODULE,
.fb_open = omapfb_open,
.fb_release = omapfb_release,
.fb_setcolreg = omapfb_setcolreg,
.fb_setcmap = omapfb_setcmap,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_blank = omapfb_blank,
.fb_ioctl = omapfb_ioctl,
.fb_check_var = omapfb_check_var,
.fb_set_par = omapfb_set_par,
.fb_pan_display = omapfb_pan_display,
};
/*
* ---------------------------------------------------------------------------
* Sysfs interface
* ---------------------------------------------------------------------------
*/
/* omapfbX sysfs entries */
static ssize_t omapfb_show_caps_num(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omapfb_device *fbdev = dev_get_drvdata(dev);
int plane;
size_t size;
struct omapfb_caps caps;
plane = 0;
size = 0;
while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
omapfb_get_caps(fbdev, plane, &caps);
size += snprintf(&buf[size], PAGE_SIZE - size,
"plane#%d %#010x %#010x %#010x\n",
plane, caps.ctrl, caps.plane_color, caps.wnd_color);
plane++;
}
return size;
}
static ssize_t omapfb_show_caps_text(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omapfb_device *fbdev = dev_get_drvdata(dev);
int i;
struct omapfb_caps caps;
int plane;
size_t size;
plane = 0;
size = 0;
while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
omapfb_get_caps(fbdev, plane, &caps);
size += snprintf(&buf[size], PAGE_SIZE - size,
"plane#%d:\n", plane);
for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
size < PAGE_SIZE; i++) {
if (ctrl_caps[i].flag & caps.ctrl)
size += snprintf(&buf[size], PAGE_SIZE - size,
" %s\n", ctrl_caps[i].name);
}
size += snprintf(&buf[size], PAGE_SIZE - size,
" plane colors:\n");
for (i = 0; i < ARRAY_SIZE(color_caps) &&
size < PAGE_SIZE; i++) {
if (color_caps[i].flag & caps.plane_color)
size += snprintf(&buf[size], PAGE_SIZE - size,
" %s\n", color_caps[i].name);
}
size += snprintf(&buf[size], PAGE_SIZE - size,
" window colors:\n");
for (i = 0; i < ARRAY_SIZE(color_caps) &&
size < PAGE_SIZE; i++) {
if (color_caps[i].flag & caps.wnd_color)
size += snprintf(&buf[size], PAGE_SIZE - size,
" %s\n", color_caps[i].name);
}
plane++;
}
return size;
}
static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
/* panel sysfs entries */
static ssize_t omapfb_show_panel_name(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omapfb_device *fbdev = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
}
static ssize_t omapfb_show_bklight_level(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct omapfb_device *fbdev = dev_get_drvdata(dev);
int r;
if (fbdev->panel->get_bklight_level) {
r = snprintf(buf, PAGE_SIZE, "%d\n",
fbdev->panel->get_bklight_level(fbdev->panel));
} else
r = -ENODEV;
return r;
}
static ssize_t omapfb_store_bklight_level(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct omapfb_device *fbdev = dev_get_drvdata(dev);
int r;
if (fbdev->panel->set_bklight_level) {
unsigned int level;
if (sscanf(buf, "%10d", &level) == 1) {
r = fbdev->panel->set_bklight_level(fbdev->panel,
level);
} else
r = -EINVAL;
} else
r = -ENODEV;
return r ? r : size;
}
static ssize_t omapfb_show_bklight_max(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omapfb_device *fbdev = dev_get_drvdata(dev);
int r;
if (fbdev->panel->get_bklight_level) {
r = snprintf(buf, PAGE_SIZE, "%d\n",
fbdev->panel->get_bklight_max(fbdev->panel));
} else
r = -ENODEV;
return r;
}
static struct device_attribute dev_attr_panel_name =
__ATTR(name, 0444, omapfb_show_panel_name, NULL);
static DEVICE_ATTR(backlight_level, 0664,
omapfb_show_bklight_level, omapfb_store_bklight_level);
static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
static struct attribute *panel_attrs[] = {
&dev_attr_panel_name.attr,
&dev_attr_backlight_level.attr,
&dev_attr_backlight_max.attr,
NULL,
};
static struct attribute_group panel_attr_grp = {
.name = "panel",
.attrs = panel_attrs,
};
/* ctrl sysfs entries */
static ssize_t omapfb_show_ctrl_name(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omapfb_device *fbdev = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
}
static struct device_attribute dev_attr_ctrl_name =
__ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
static struct attribute *ctrl_attrs[] = {
&dev_attr_ctrl_name.attr,
NULL,
};
static struct attribute_group ctrl_attr_grp = {
.name = "ctrl",
.attrs = ctrl_attrs,
};
static int omapfb_register_sysfs(struct omapfb_device *fbdev)
{
int r;
if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
goto fail0;
if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
goto fail1;
if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
goto fail2;
if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
goto fail3;
return 0;
fail3:
sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
fail2:
device_remove_file(fbdev->dev, &dev_attr_caps_text);
fail1:
device_remove_file(fbdev->dev, &dev_attr_caps_num);
fail0:
dev_err(fbdev->dev, "unable to register sysfs interface\n");
return r;
}
static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
{
sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
device_remove_file(fbdev->dev, &dev_attr_caps_num);
device_remove_file(fbdev->dev, &dev_attr_caps_text);
}
/*
* ---------------------------------------------------------------------------
* LDM callbacks
* ---------------------------------------------------------------------------
*/
/* Initialize system fb_info object and set the default video mode.
* The frame buffer memory already allocated by lcddma_init
*/
static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
{
struct fb_var_screeninfo *var = &info->var;
struct fb_fix_screeninfo *fix = &info->fix;
int r = 0;
info->fbops = &omapfb_ops;
info->flags = FBINFO_FLAG_DEFAULT;
strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
info->pseudo_palette = fbdev->pseudo_palette;
var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
var->xres = def_vxres;
var->yres = def_vyres;
var->xres_virtual = def_vxres;
var->yres_virtual = def_vyres;
var->rotate = def_rotate;
var->bits_per_pixel = fbdev->panel->bpp;
set_fb_var(info, var);
set_fb_fix(info, 1);
r = fb_alloc_cmap(&info->cmap, 16, 0);
if (r != 0)
dev_err(fbdev->dev, "unable to allocate color map memory\n");
return r;
}
/* Release the fb_info object */
static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
{
fb_dealloc_cmap(&fbi->cmap);
}
static void planes_cleanup(struct omapfb_device *fbdev)
{
int i;
for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
if (fbdev->fb_info[i] == NULL)
break;
fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
framebuffer_release(fbdev->fb_info[i]);
}
}
static int planes_init(struct omapfb_device *fbdev)
{
struct fb_info *fbi;
int i;
int r;
for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
struct omapfb_plane_struct *plane;
fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
fbdev->dev);
if (fbi == NULL) {
dev_err(fbdev->dev,
"unable to allocate memory for plane info\n");
planes_cleanup(fbdev);
return -ENOMEM;
}
plane = fbi->par;
plane->idx = i;
plane->fbdev = fbdev;
plane->info.mirror = def_mirror;
fbdev->fb_info[i] = fbi;
if ((r = fbinfo_init(fbdev, fbi)) < 0) {
framebuffer_release(fbi);
planes_cleanup(fbdev);
return r;
}
plane->info.out_width = fbi->var.xres;
plane->info.out_height = fbi->var.yres;
}
return 0;
}
/*
* Free driver resources. Can be called to rollback an aborted initialization
* sequence.
*/
static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
{
int i;
switch (state) {
case OMAPFB_ACTIVE:
for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
unregister_framebuffer(fbdev->fb_info[i]);
case 7:
omapfb_unregister_sysfs(fbdev);
case 6:
fbdev->panel->disable(fbdev->panel);
case 5:
omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
case 4:
planes_cleanup(fbdev);
case 3:
ctrl_cleanup(fbdev);
case 2:
fbdev->panel->cleanup(fbdev->panel);
case 1:
dev_set_drvdata(fbdev->dev, NULL);
kfree(fbdev);
case 0:
/* nothing to free */
break;
default:
BUG();
}
}
static int omapfb_find_ctrl(struct omapfb_device *fbdev)
{
struct omapfb_platform_data *conf;
char name[17];
int i;
conf = dev_get_platdata(fbdev->dev);
fbdev->ctrl = NULL;
strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
name[sizeof(name) - 1] = '\0';
if (strcmp(name, "internal") == 0) {
fbdev->ctrl = fbdev->int_ctrl;
return 0;
}
for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
if (strcmp(ctrls[i]->name, name) == 0) {
fbdev->ctrl = ctrls[i];
break;
}
}
if (fbdev->ctrl == NULL) {
dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
return -1;
}
return 0;
}
static void check_required_callbacks(struct omapfb_device *fbdev)
{
#define _C(x) (fbdev->ctrl->x != NULL)
#define _P(x) (fbdev->panel->x != NULL)
BUG_ON(fbdev->ctrl == NULL || fbdev->panel == NULL);
BUG_ON(!(_C(init) && _C(cleanup) && _C(get_caps) &&
_C(set_update_mode) && _C(setup_plane) && _C(enable_plane) &&
_P(init) && _P(cleanup) && _P(enable) && _P(disable) &&
_P(get_caps)));
#undef _P
#undef _C
}
/*
* Called by LDM binding to probe and attach a new device.
* Initialization sequence:
* 1. allocate system omapfb_device structure
* 2. select controller type according to platform configuration
* init LCD panel
* 3. init LCD controller and LCD DMA
* 4. init system fb_info structure for all planes
* 5. setup video mode for first plane and enable it
* 6. enable LCD panel
* 7. register sysfs attributes
* OMAPFB_ACTIVE: register system fb_info structure for all planes
*/
static int omapfb_do_probe(struct platform_device *pdev,
struct lcd_panel *panel)
{
struct omapfb_device *fbdev = NULL;
int init_state;
unsigned long phz, hhz, vhz;
unsigned long vram;
int i;
int r = 0;
init_state = 0;
if (pdev->num_resources != 0) {
dev_err(&pdev->dev, "probed for an unknown device\n");
r = -ENODEV;
goto cleanup;
}
if (dev_get_platdata(&pdev->dev) == NULL) {
dev_err(&pdev->dev, "missing platform data\n");
r = -ENOENT;
goto cleanup;
}
fbdev = kzalloc(sizeof(struct omapfb_device), GFP_KERNEL);
if (fbdev == NULL) {
dev_err(&pdev->dev,
"unable to allocate memory for device info\n");
r = -ENOMEM;
goto cleanup;
}
init_state++;
fbdev->dev = &pdev->dev;
fbdev->panel = panel;
fbdev->dssdev = &omapdss_device;
platform_set_drvdata(pdev, fbdev);
mutex_init(&fbdev->rqueue_mutex);
fbdev->int_ctrl = &omap1_int_ctrl;
#ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
fbdev->ext_if = &omap1_ext_if;
#endif
if (omapfb_find_ctrl(fbdev) < 0) {
dev_err(fbdev->dev,
"LCD controller not found, board not supported\n");
r = -ENODEV;
goto cleanup;
}
r = fbdev->panel->init(fbdev->panel, fbdev);
if (r)
goto cleanup;
pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
init_state++;
r = ctrl_init(fbdev);
if (r)
goto cleanup;
if (fbdev->ctrl->mmap != NULL)
omapfb_ops.fb_mmap = omapfb_mmap;
init_state++;
check_required_callbacks(fbdev);
r = planes_init(fbdev);
if (r)
goto cleanup;
init_state++;
#ifdef CONFIG_FB_OMAP_DMA_TUNE
/* Set DMA priority for EMIFF access to highest */
omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
#endif
r = ctrl_change_mode(fbdev->fb_info[0]);
if (r) {
dev_err(fbdev->dev, "mode setting failed\n");
goto cleanup;
}
/* GFX plane is enabled by default */
r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
if (r)
goto cleanup;
omapfb_set_update_mode(fbdev, manual_update ?
OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
init_state++;
r = fbdev->panel->enable(fbdev->panel);
if (r)
goto cleanup;
init_state++;
r = omapfb_register_sysfs(fbdev);
if (r)
goto cleanup;
init_state++;
vram = 0;
for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
r = register_framebuffer(fbdev->fb_info[i]);
if (r != 0) {
dev_err(fbdev->dev,
"registering framebuffer %d failed\n", i);
goto cleanup;
}
vram += fbdev->mem_desc.region[i].size;
}
fbdev->state = OMAPFB_ACTIVE;
panel = fbdev->panel;
phz = panel->pixel_clock * 1000;
hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
omapfb_dev = fbdev;
pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
vram, fbdev->mem_desc.region_cnt);
pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
"vfreq %lu.%lu Hz\n",
phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
return 0;
cleanup:
omapfb_free_resources(fbdev, init_state);
return r;
}
static int omapfb_probe(struct platform_device *pdev)
{
int r;
BUG_ON(fbdev_pdev != NULL);
r = platform_device_register(&omapdss_device);
if (r) {
dev_err(&pdev->dev, "can't register omapdss device\n");
return r;
}
/* Delay actual initialization until the LCD is registered */
fbdev_pdev = pdev;
if (fbdev_panel != NULL)
omapfb_do_probe(fbdev_pdev, fbdev_panel);
return 0;
}
void omapfb_register_panel(struct lcd_panel *panel)
{
BUG_ON(fbdev_panel != NULL);
fbdev_panel = panel;
if (fbdev_pdev != NULL)
omapfb_do_probe(fbdev_pdev, fbdev_panel);
}
EXPORT_SYMBOL_GPL(omapfb_register_panel);
/* Called when the device is being detached from the driver */
static int omapfb_remove(struct platform_device *pdev)
{
struct omapfb_device *fbdev = platform_get_drvdata(pdev);
enum omapfb_state saved_state = fbdev->state;
/* FIXME: wait till completion of pending events */
fbdev->state = OMAPFB_DISABLED;
omapfb_free_resources(fbdev, saved_state);
platform_device_unregister(&omapdss_device);
fbdev->dssdev = NULL;
return 0;
}
/* PM suspend */
static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
{
struct omapfb_device *fbdev = platform_get_drvdata(pdev);
if (fbdev != NULL)
omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
return 0;
}
/* PM resume */
static int omapfb_resume(struct platform_device *pdev)
{
struct omapfb_device *fbdev = platform_get_drvdata(pdev);
if (fbdev != NULL)
omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
return 0;
}
static struct platform_driver omapfb_driver = {
.probe = omapfb_probe,
.remove = omapfb_remove,
.suspend = omapfb_suspend,
.resume = omapfb_resume,
.driver = {
.name = MODULE_NAME,
},
};
#ifndef MODULE
/* Process kernel command line parameters */
static int __init omapfb_setup(char *options)
{
char *this_opt = NULL;
int r = 0;
pr_debug("omapfb: options %s\n", options);
if (!options || !*options)
return 0;
while (!r && (this_opt = strsep(&options, ",")) != NULL) {
if (!strncmp(this_opt, "accel", 5))
def_accel = 1;
else if (!strncmp(this_opt, "vram:", 5)) {
char *suffix;
unsigned long vram;
vram = (simple_strtoul(this_opt + 5, &suffix, 0));
switch (suffix[0]) {
case '\0':
break;
case 'm':
case 'M':
vram *= 1024;
/* Fall through */
case 'k':
case 'K':
vram *= 1024;
break;
default:
pr_debug("omapfb: invalid vram suffix %c\n",
suffix[0]);
r = -1;
}
def_vram[def_vram_cnt++] = vram;
}
else if (!strncmp(this_opt, "vxres:", 6))
def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
else if (!strncmp(this_opt, "vyres:", 6))
def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
else if (!strncmp(this_opt, "rotate:", 7))
def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
else if (!strncmp(this_opt, "mirror:", 7))
def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
else if (!strncmp(this_opt, "manual_update", 13))
manual_update = 1;
else {
pr_debug("omapfb: invalid option\n");
r = -1;
}
}
return r;
}
#endif
/* Register both the driver and the device */
static int __init omapfb_init(void)
{
#ifndef MODULE
char *option;
if (fb_get_options("omapfb", &option))
return -ENODEV;
omapfb_setup(option);
#endif
/* Register the driver with LDM */
if (platform_driver_register(&omapfb_driver)) {
pr_debug("failed to register omapfb driver\n");
return -ENODEV;
}
return 0;
}
static void __exit omapfb_cleanup(void)
{
platform_driver_unregister(&omapfb_driver);
}
module_param_named(accel, def_accel, uint, 0664);
module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
module_param_named(vxres, def_vxres, long, 0664);
module_param_named(vyres, def_vyres, long, 0664);
module_param_named(rotate, def_rotate, uint, 0664);
module_param_named(mirror, def_mirror, uint, 0664);
module_param_named(manual_update, manual_update, bool, 0664);
module_init(omapfb_init);
module_exit(omapfb_cleanup);
MODULE_DESCRIPTION("TI OMAP framebuffer driver");
MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
MODULE_LICENSE("GPL");