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linuxdebug/drivers/video/fbdev/omap2/omapfb/omapfb-main.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/drivers/video/omap2/omapfb-main.c
*
* Copyright (C) 2008 Nokia Corporation
* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
*
* Some code and ideas taken from drivers/video/omap/ driver
* by Imre Deak.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/dma-mapping.h>
#include <linux/vmalloc.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/omapfb.h>
#include <video/omapfb_dss.h>
#include <video/omapvrfb.h>
#include "omapfb.h"
#define MODULE_NAME "omapfb"
#define OMAPFB_PLANE_XRES_MIN 8
#define OMAPFB_PLANE_YRES_MIN 8
static char *def_mode;
static char *def_vram;
static bool def_vrfb;
static int def_rotate;
static bool def_mirror;
static bool auto_update;
static unsigned int auto_update_freq;
module_param(auto_update, bool, 0);
module_param(auto_update_freq, uint, 0644);
#ifdef DEBUG
bool omapfb_debug;
module_param_named(debug, omapfb_debug, bool, 0644);
static bool omapfb_test_pattern;
module_param_named(test, omapfb_test_pattern, bool, 0644);
#endif
static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi);
static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
struct omap_dss_device *dssdev);
#ifdef DEBUG
static void draw_pixel(struct fb_info *fbi, int x, int y, unsigned color)
{
struct fb_var_screeninfo *var = &fbi->var;
struct fb_fix_screeninfo *fix = &fbi->fix;
void __iomem *addr = fbi->screen_base;
const unsigned bytespp = var->bits_per_pixel >> 3;
const unsigned line_len = fix->line_length / bytespp;
int r = (color >> 16) & 0xff;
int g = (color >> 8) & 0xff;
int b = (color >> 0) & 0xff;
if (var->bits_per_pixel == 16) {
u16 __iomem *p = (u16 __iomem *)addr;
p += y * line_len + x;
r = r * 32 / 256;
g = g * 64 / 256;
b = b * 32 / 256;
__raw_writew((r << 11) | (g << 5) | (b << 0), p);
} else if (var->bits_per_pixel == 24) {
u8 __iomem *p = (u8 __iomem *)addr;
p += (y * line_len + x) * 3;
__raw_writeb(b, p + 0);
__raw_writeb(g, p + 1);
__raw_writeb(r, p + 2);
} else if (var->bits_per_pixel == 32) {
u32 __iomem *p = (u32 __iomem *)addr;
p += y * line_len + x;
__raw_writel(color, p);
}
}
static void fill_fb(struct fb_info *fbi)
{
struct fb_var_screeninfo *var = &fbi->var;
const short w = var->xres_virtual;
const short h = var->yres_virtual;
void __iomem *addr = fbi->screen_base;
int y, x;
if (!addr)
return;
DBG("fill_fb %dx%d, line_len %d bytes\n", w, h, fbi->fix.line_length);
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
if (x < 20 && y < 20)
draw_pixel(fbi, x, y, 0xffffff);
else if (x < 20 && (y > 20 && y < h - 20))
draw_pixel(fbi, x, y, 0xff);
else if (y < 20 && (x > 20 && x < w - 20))
draw_pixel(fbi, x, y, 0xff00);
else if (x > w - 20 && (y > 20 && y < h - 20))
draw_pixel(fbi, x, y, 0xff0000);
else if (y > h - 20 && (x > 20 && x < w - 20))
draw_pixel(fbi, x, y, 0xffff00);
else if (x == 20 || x == w - 20 ||
y == 20 || y == h - 20)
draw_pixel(fbi, x, y, 0xffffff);
else if (x == y || w - x == h - y)
draw_pixel(fbi, x, y, 0xff00ff);
else if (w - x == y || x == h - y)
draw_pixel(fbi, x, y, 0x00ffff);
else if (x > 20 && y > 20 && x < w - 20 && y < h - 20) {
int t = x * 3 / w;
unsigned r = 0, g = 0, b = 0;
unsigned c;
if (var->bits_per_pixel == 16) {
if (t == 0)
b = (y % 32) * 256 / 32;
else if (t == 1)
g = (y % 64) * 256 / 64;
else if (t == 2)
r = (y % 32) * 256 / 32;
} else {
if (t == 0)
b = (y % 256);
else if (t == 1)
g = (y % 256);
else if (t == 2)
r = (y % 256);
}
c = (r << 16) | (g << 8) | (b << 0);
draw_pixel(fbi, x, y, c);
} else {
draw_pixel(fbi, x, y, 0);
}
}
}
}
#endif
static unsigned omapfb_get_vrfb_offset(const struct omapfb_info *ofbi, int rot)
{
const struct vrfb *vrfb = &ofbi->region->vrfb;
unsigned offset;
switch (rot) {
case FB_ROTATE_UR:
offset = 0;
break;
case FB_ROTATE_CW:
offset = vrfb->yoffset;
break;
case FB_ROTATE_UD:
offset = vrfb->yoffset * OMAP_VRFB_LINE_LEN + vrfb->xoffset;
break;
case FB_ROTATE_CCW:
offset = vrfb->xoffset * OMAP_VRFB_LINE_LEN;
break;
default:
BUG();
return 0;
}
offset *= vrfb->bytespp;
return offset;
}
static u32 omapfb_get_region_rot_paddr(const struct omapfb_info *ofbi, int rot)
{
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
return ofbi->region->vrfb.paddr[rot]
+ omapfb_get_vrfb_offset(ofbi, rot);
} else {
return ofbi->region->paddr;
}
}
static u32 omapfb_get_region_paddr(const struct omapfb_info *ofbi)
{
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
return ofbi->region->vrfb.paddr[0];
else
return ofbi->region->paddr;
}
static void __iomem *omapfb_get_region_vaddr(const struct omapfb_info *ofbi)
{
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
return ofbi->region->vrfb.vaddr[0];
else
return ofbi->region->vaddr;
}
static struct omapfb_colormode omapfb_colormodes[] = {
{
.dssmode = OMAP_DSS_COLOR_UYVY,
.bits_per_pixel = 16,
.nonstd = OMAPFB_COLOR_YUV422,
}, {
.dssmode = OMAP_DSS_COLOR_YUV2,
.bits_per_pixel = 16,
.nonstd = OMAPFB_COLOR_YUY422,
}, {
.dssmode = OMAP_DSS_COLOR_ARGB16,
.bits_per_pixel = 16,
.red = { .length = 4, .offset = 8, .msb_right = 0 },
.green = { .length = 4, .offset = 4, .msb_right = 0 },
.blue = { .length = 4, .offset = 0, .msb_right = 0 },
.transp = { .length = 4, .offset = 12, .msb_right = 0 },
}, {
.dssmode = OMAP_DSS_COLOR_RGB16,
.bits_per_pixel = 16,
.red = { .length = 5, .offset = 11, .msb_right = 0 },
.green = { .length = 6, .offset = 5, .msb_right = 0 },
.blue = { .length = 5, .offset = 0, .msb_right = 0 },
.transp = { .length = 0, .offset = 0, .msb_right = 0 },
}, {
.dssmode = OMAP_DSS_COLOR_RGB24P,
.bits_per_pixel = 24,
.red = { .length = 8, .offset = 16, .msb_right = 0 },
.green = { .length = 8, .offset = 8, .msb_right = 0 },
.blue = { .length = 8, .offset = 0, .msb_right = 0 },
.transp = { .length = 0, .offset = 0, .msb_right = 0 },
}, {
.dssmode = OMAP_DSS_COLOR_RGB24U,
.bits_per_pixel = 32,
.red = { .length = 8, .offset = 16, .msb_right = 0 },
.green = { .length = 8, .offset = 8, .msb_right = 0 },
.blue = { .length = 8, .offset = 0, .msb_right = 0 },
.transp = { .length = 0, .offset = 0, .msb_right = 0 },
}, {
.dssmode = OMAP_DSS_COLOR_ARGB32,
.bits_per_pixel = 32,
.red = { .length = 8, .offset = 16, .msb_right = 0 },
.green = { .length = 8, .offset = 8, .msb_right = 0 },
.blue = { .length = 8, .offset = 0, .msb_right = 0 },
.transp = { .length = 8, .offset = 24, .msb_right = 0 },
}, {
.dssmode = OMAP_DSS_COLOR_RGBA32,
.bits_per_pixel = 32,
.red = { .length = 8, .offset = 24, .msb_right = 0 },
.green = { .length = 8, .offset = 16, .msb_right = 0 },
.blue = { .length = 8, .offset = 8, .msb_right = 0 },
.transp = { .length = 8, .offset = 0, .msb_right = 0 },
}, {
.dssmode = OMAP_DSS_COLOR_RGBX32,
.bits_per_pixel = 32,
.red = { .length = 8, .offset = 24, .msb_right = 0 },
.green = { .length = 8, .offset = 16, .msb_right = 0 },
.blue = { .length = 8, .offset = 8, .msb_right = 0 },
.transp = { .length = 0, .offset = 0, .msb_right = 0 },
},
};
static bool cmp_component(struct fb_bitfield *f1, struct fb_bitfield *f2)
{
return f1->length == f2->length &&
f1->offset == f2->offset &&
f1->msb_right == f2->msb_right;
}
static bool cmp_var_to_colormode(struct fb_var_screeninfo *var,
struct omapfb_colormode *color)
{
if (var->bits_per_pixel == 0 ||
var->red.length == 0 ||
var->blue.length == 0 ||
var->green.length == 0)
return false;
return var->bits_per_pixel == color->bits_per_pixel &&
cmp_component(&var->red, &color->red) &&
cmp_component(&var->green, &color->green) &&
cmp_component(&var->blue, &color->blue) &&
cmp_component(&var->transp, &color->transp);
}
static void assign_colormode_to_var(struct fb_var_screeninfo *var,
struct omapfb_colormode *color)
{
var->bits_per_pixel = color->bits_per_pixel;
var->nonstd = color->nonstd;
var->red = color->red;
var->green = color->green;
var->blue = color->blue;
var->transp = color->transp;
}
static int fb_mode_to_dss_mode(struct fb_var_screeninfo *var,
enum omap_color_mode *mode)
{
enum omap_color_mode dssmode;
int i;
/* first match with nonstd field */
if (var->nonstd) {
for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
struct omapfb_colormode *m = &omapfb_colormodes[i];
if (var->nonstd == m->nonstd) {
assign_colormode_to_var(var, m);
*mode = m->dssmode;
return 0;
}
}
return -EINVAL;
}
/* then try exact match of bpp and colors */
for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
struct omapfb_colormode *m = &omapfb_colormodes[i];
if (cmp_var_to_colormode(var, m)) {
assign_colormode_to_var(var, m);
*mode = m->dssmode;
return 0;
}
}
/* match with bpp if user has not filled color fields
* properly */
switch (var->bits_per_pixel) {
case 1:
dssmode = OMAP_DSS_COLOR_CLUT1;
break;
case 2:
dssmode = OMAP_DSS_COLOR_CLUT2;
break;
case 4:
dssmode = OMAP_DSS_COLOR_CLUT4;
break;
case 8:
dssmode = OMAP_DSS_COLOR_CLUT8;
break;
case 12:
dssmode = OMAP_DSS_COLOR_RGB12U;
break;
case 16:
dssmode = OMAP_DSS_COLOR_RGB16;
break;
case 24:
dssmode = OMAP_DSS_COLOR_RGB24P;
break;
case 32:
dssmode = OMAP_DSS_COLOR_RGB24U;
break;
default:
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
struct omapfb_colormode *m = &omapfb_colormodes[i];
if (dssmode == m->dssmode) {
assign_colormode_to_var(var, m);
*mode = m->dssmode;
return 0;
}
}
return -EINVAL;
}
static int check_fb_res_bounds(struct fb_var_screeninfo *var)
{
int xres_min = OMAPFB_PLANE_XRES_MIN;
int xres_max = 2048;
int yres_min = OMAPFB_PLANE_YRES_MIN;
int yres_max = 2048;
/* XXX: some applications seem to set virtual res to 0. */
if (var->xres_virtual == 0)
var->xres_virtual = var->xres;
if (var->yres_virtual == 0)
var->yres_virtual = var->yres;
if (var->xres_virtual < xres_min || var->yres_virtual < yres_min)
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 > var->xres_virtual)
var->xres = var->xres_virtual;
if (var->yres > var->yres_virtual)
var->yres = var->yres_virtual;
return 0;
}
static void shrink_height(unsigned long max_frame_size,
struct fb_var_screeninfo *var)
{
DBG("can't fit FB into memory, reducing y\n");
var->yres_virtual = max_frame_size /
(var->xres_virtual * var->bits_per_pixel >> 3);
if (var->yres_virtual < OMAPFB_PLANE_YRES_MIN)
var->yres_virtual = OMAPFB_PLANE_YRES_MIN;
if (var->yres > var->yres_virtual)
var->yres = var->yres_virtual;
}
static void shrink_width(unsigned long max_frame_size,
struct fb_var_screeninfo *var)
{
DBG("can't fit FB into memory, reducing x\n");
var->xres_virtual = max_frame_size / var->yres_virtual /
(var->bits_per_pixel >> 3);
if (var->xres_virtual < OMAPFB_PLANE_XRES_MIN)
var->xres_virtual = OMAPFB_PLANE_XRES_MIN;
if (var->xres > var->xres_virtual)
var->xres = var->xres_virtual;
}
static int check_vrfb_fb_size(unsigned long region_size,
const struct fb_var_screeninfo *var)
{
unsigned long min_phys_size = omap_vrfb_min_phys_size(var->xres_virtual,
var->yres_virtual, var->bits_per_pixel >> 3);
return min_phys_size > region_size ? -EINVAL : 0;
}
static int check_fb_size(const struct omapfb_info *ofbi,
struct fb_var_screeninfo *var)
{
unsigned long max_frame_size = ofbi->region->size;
int bytespp = var->bits_per_pixel >> 3;
unsigned long line_size = var->xres_virtual * bytespp;
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
/* One needs to check for both VRFB and OMAPFB limitations. */
if (check_vrfb_fb_size(max_frame_size, var))
shrink_height(omap_vrfb_max_height(
max_frame_size, var->xres_virtual, bytespp) *
line_size, var);
if (check_vrfb_fb_size(max_frame_size, var)) {
DBG("cannot fit FB to memory\n");
return -EINVAL;
}
return 0;
}
DBG("max frame size %lu, line size %lu\n", max_frame_size, line_size);
if (line_size * var->yres_virtual > max_frame_size)
shrink_height(max_frame_size, var);
if (line_size * var->yres_virtual > max_frame_size) {
shrink_width(max_frame_size, var);
line_size = var->xres_virtual * bytespp;
}
if (line_size * var->yres_virtual > max_frame_size) {
DBG("cannot fit FB to memory\n");
return -EINVAL;
}
return 0;
}
/*
* Consider if VRFB assisted rotation is in use and if the virtual space for
* the zero degree view needs to be mapped. The need for mapping also acts as
* the trigger for setting up the hardware on the context in question. This
* ensures that one does not attempt to access the virtual view before the
* hardware is serving the address translations.
*/
static int setup_vrfb_rotation(struct fb_info *fbi)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
struct omapfb2_mem_region *rg = ofbi->region;
struct vrfb *vrfb = &rg->vrfb;
struct fb_var_screeninfo *var = &fbi->var;
struct fb_fix_screeninfo *fix = &fbi->fix;
unsigned bytespp;
bool yuv_mode;
enum omap_color_mode mode;
int r;
bool reconf;
if (!rg->size || ofbi->rotation_type != OMAP_DSS_ROT_VRFB)
return 0;
DBG("setup_vrfb_rotation\n");
r = fb_mode_to_dss_mode(var, &mode);
if (r)
return r;
bytespp = var->bits_per_pixel >> 3;
yuv_mode = mode == OMAP_DSS_COLOR_YUV2 || mode == OMAP_DSS_COLOR_UYVY;
/* We need to reconfigure VRFB if the resolution changes, if yuv mode
* is enabled/disabled, or if bytes per pixel changes */
/* XXX we shouldn't allow this when framebuffer is mmapped */
reconf = false;
if (yuv_mode != vrfb->yuv_mode)
reconf = true;
else if (bytespp != vrfb->bytespp)
reconf = true;
else if (vrfb->xres != var->xres_virtual ||
vrfb->yres != var->yres_virtual)
reconf = true;
if (vrfb->vaddr[0] && reconf) {
fbi->screen_base = NULL;
fix->smem_start = 0;
fix->smem_len = 0;
iounmap(vrfb->vaddr[0]);
vrfb->vaddr[0] = NULL;
DBG("setup_vrfb_rotation: reset fb\n");
}
if (vrfb->vaddr[0])
return 0;
omap_vrfb_setup(&rg->vrfb, rg->paddr,
var->xres_virtual,
var->yres_virtual,
bytespp, yuv_mode);
/* Now one can ioremap the 0 angle view */
r = omap_vrfb_map_angle(vrfb, var->yres_virtual, 0);
if (r)
return r;
/* used by open/write in fbmem.c */
fbi->screen_base = ofbi->region->vrfb.vaddr[0];
fix->smem_start = ofbi->region->vrfb.paddr[0];
switch (var->nonstd) {
case OMAPFB_COLOR_YUV422:
case OMAPFB_COLOR_YUY422:
fix->line_length =
(OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
break;
default:
fix->line_length =
(OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
break;
}
fix->smem_len = var->yres_virtual * fix->line_length;
return 0;
}
int dss_mode_to_fb_mode(enum omap_color_mode dssmode,
struct fb_var_screeninfo *var)
{
int i;
for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
struct omapfb_colormode *mode = &omapfb_colormodes[i];
if (dssmode == mode->dssmode) {
assign_colormode_to_var(var, mode);
return 0;
}
}
return -ENOENT;
}
void set_fb_fix(struct fb_info *fbi)
{
struct fb_fix_screeninfo *fix = &fbi->fix;
struct fb_var_screeninfo *var = &fbi->var;
struct omapfb_info *ofbi = FB2OFB(fbi);
struct omapfb2_mem_region *rg = ofbi->region;
DBG("set_fb_fix\n");
/* used by open/write in fbmem.c */
fbi->screen_base = (char __iomem *)omapfb_get_region_vaddr(ofbi);
/* used by mmap in fbmem.c */
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
switch (var->nonstd) {
case OMAPFB_COLOR_YUV422:
case OMAPFB_COLOR_YUY422:
fix->line_length =
(OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
break;
default:
fix->line_length =
(OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
break;
}
fix->smem_len = var->yres_virtual * fix->line_length;
} else {
fix->line_length =
(var->xres_virtual * var->bits_per_pixel) >> 3;
fix->smem_len = rg->size;
}
fix->smem_start = omapfb_get_region_paddr(ofbi);
fix->type = FB_TYPE_PACKED_PIXELS;
if (var->nonstd)
fix->visual = FB_VISUAL_PSEUDOCOLOR;
else {
switch (var->bits_per_pixel) {
case 32:
case 24:
case 16:
case 12:
fix->visual = FB_VISUAL_TRUECOLOR;
/* 12bpp is stored in 16 bits */
break;
case 1:
case 2:
case 4:
case 8:
fix->visual = FB_VISUAL_PSEUDOCOLOR;
break;
}
}
fix->accel = FB_ACCEL_NONE;
fix->xpanstep = 1;
fix->ypanstep = 1;
}
/* check new var and possibly modify it to be ok */
int check_fb_var(struct fb_info *fbi, struct fb_var_screeninfo *var)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
struct omap_dss_device *display = fb2display(fbi);
enum omap_color_mode mode = 0;
int i;
int r;
DBG("check_fb_var %d\n", ofbi->id);
WARN_ON(!atomic_read(&ofbi->region->lock_count));
r = fb_mode_to_dss_mode(var, &mode);
if (r) {
DBG("cannot convert var to omap dss mode\n");
return r;
}
for (i = 0; i < ofbi->num_overlays; ++i) {
if ((ofbi->overlays[i]->supported_modes & mode) == 0) {
DBG("invalid mode\n");
return -EINVAL;
}
}
if (var->rotate > 3)
return -EINVAL;
if (check_fb_res_bounds(var))
return -EINVAL;
/* When no memory is allocated ignore the size check */
if (ofbi->region->size != 0 && check_fb_size(ofbi, var))
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;
DBG("xres = %d, yres = %d, vxres = %d, vyres = %d\n",
var->xres, var->yres,
var->xres_virtual, var->yres_virtual);
if (display && display->driver->get_dimensions) {
u32 w, h;
display->driver->get_dimensions(display, &w, &h);
var->width = DIV_ROUND_CLOSEST(w, 1000);
var->height = DIV_ROUND_CLOSEST(h, 1000);
} else {
var->height = -1;
var->width = -1;
}
var->grayscale = 0;
if (display && display->driver->get_timings) {
struct omap_video_timings timings;
display->driver->get_timings(display, &timings);
/* pixclock in ps, the rest in pixclock */
var->pixclock = timings.pixelclock != 0 ?
KHZ2PICOS(timings.pixelclock / 1000) :
0;
var->left_margin = timings.hbp;
var->right_margin = timings.hfp;
var->upper_margin = timings.vbp;
var->lower_margin = timings.vfp;
var->hsync_len = timings.hsw;
var->vsync_len = timings.vsw;
var->sync |= timings.hsync_level == OMAPDSS_SIG_ACTIVE_HIGH ?
FB_SYNC_HOR_HIGH_ACT : 0;
var->sync |= timings.vsync_level == OMAPDSS_SIG_ACTIVE_HIGH ?
FB_SYNC_VERT_HIGH_ACT : 0;
var->vmode = timings.interlace ?
FB_VMODE_INTERLACED : FB_VMODE_NONINTERLACED;
} else {
var->pixclock = 0;
var->left_margin = 0;
var->right_margin = 0;
var->upper_margin = 0;
var->lower_margin = 0;
var->hsync_len = 0;
var->vsync_len = 0;
var->sync = 0;
var->vmode = FB_VMODE_NONINTERLACED;
}
return 0;
}
/*
* ---------------------------------------------------------------------------
* fbdev framework callbacks
* ---------------------------------------------------------------------------
*/
static int omapfb_open(struct fb_info *fbi, int user)
{
return 0;
}
static int omapfb_release(struct fb_info *fbi, int user)
{
return 0;
}
static unsigned calc_rotation_offset_dma(const struct fb_var_screeninfo *var,
const struct fb_fix_screeninfo *fix, int rotation)
{
unsigned offset;
offset = var->yoffset * fix->line_length +
var->xoffset * (var->bits_per_pixel >> 3);
return offset;
}
static unsigned calc_rotation_offset_vrfb(const struct fb_var_screeninfo *var,
const struct fb_fix_screeninfo *fix, int rotation)
{
unsigned offset;
if (rotation == FB_ROTATE_UD)
offset = (var->yres_virtual - var->yres) *
fix->line_length;
else if (rotation == FB_ROTATE_CW)
offset = (var->yres_virtual - var->yres) *
(var->bits_per_pixel >> 3);
else
offset = 0;
if (rotation == FB_ROTATE_UR)
offset += var->yoffset * fix->line_length +
var->xoffset * (var->bits_per_pixel >> 3);
else if (rotation == FB_ROTATE_UD)
offset -= var->yoffset * fix->line_length +
var->xoffset * (var->bits_per_pixel >> 3);
else if (rotation == FB_ROTATE_CW)
offset -= var->xoffset * fix->line_length +
var->yoffset * (var->bits_per_pixel >> 3);
else if (rotation == FB_ROTATE_CCW)
offset += var->xoffset * fix->line_length +
var->yoffset * (var->bits_per_pixel >> 3);
return offset;
}
static void omapfb_calc_addr(const struct omapfb_info *ofbi,
const struct fb_var_screeninfo *var,
const struct fb_fix_screeninfo *fix,
int rotation, u32 *paddr)
{
u32 data_start_p;
int offset;
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
data_start_p = omapfb_get_region_rot_paddr(ofbi, rotation);
else
data_start_p = omapfb_get_region_paddr(ofbi);
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
offset = calc_rotation_offset_vrfb(var, fix, rotation);
else
offset = calc_rotation_offset_dma(var, fix, rotation);
data_start_p += offset;
if (offset)
DBG("offset %d, %d = %d\n",
var->xoffset, var->yoffset, offset);
DBG("paddr %x\n", data_start_p);
*paddr = data_start_p;
}
/* setup overlay according to the fb */
int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
u16 posx, u16 posy, u16 outw, u16 outh)
{
int r = 0;
struct omapfb_info *ofbi = FB2OFB(fbi);
struct fb_var_screeninfo *var = &fbi->var;
struct fb_fix_screeninfo *fix = &fbi->fix;
enum omap_color_mode mode = 0;
u32 data_start_p = 0;
struct omap_overlay_info info;
int xres, yres;
int screen_width;
int mirror;
int rotation = var->rotate;
int i;
WARN_ON(!atomic_read(&ofbi->region->lock_count));
for (i = 0; i < ofbi->num_overlays; i++) {
if (ovl != ofbi->overlays[i])
continue;
rotation = (rotation + ofbi->rotation[i]) % 4;
break;
}
DBG("setup_overlay %d, posx %d, posy %d, outw %d, outh %d\n", ofbi->id,
posx, posy, outw, outh);
if (rotation == FB_ROTATE_CW || rotation == FB_ROTATE_CCW) {
xres = var->yres;
yres = var->xres;
} else {
xres = var->xres;
yres = var->yres;
}
if (ofbi->region->size)
omapfb_calc_addr(ofbi, var, fix, rotation, &data_start_p);
r = fb_mode_to_dss_mode(var, &mode);
if (r) {
DBG("fb_mode_to_dss_mode failed");
goto err;
}
switch (var->nonstd) {
case OMAPFB_COLOR_YUV422:
case OMAPFB_COLOR_YUY422:
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
screen_width = fix->line_length
/ (var->bits_per_pixel >> 2);
break;
}
fallthrough;
default:
screen_width = fix->line_length / (var->bits_per_pixel >> 3);
break;
}
ovl->get_overlay_info(ovl, &info);
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
mirror = 0;
else
mirror = ofbi->mirror;
info.paddr = data_start_p;
info.screen_width = screen_width;
info.width = xres;
info.height = yres;
info.color_mode = mode;
info.rotation_type = ofbi->rotation_type;
info.rotation = rotation;
info.mirror = mirror;
info.pos_x = posx;
info.pos_y = posy;
info.out_width = outw;
info.out_height = outh;
r = ovl->set_overlay_info(ovl, &info);
if (r) {
DBG("ovl->setup_overlay_info failed\n");
goto err;
}
return 0;
err:
DBG("setup_overlay failed\n");
return r;
}
/* apply var to the overlay */
int omapfb_apply_changes(struct fb_info *fbi, int init)
{
int r = 0;
struct omapfb_info *ofbi = FB2OFB(fbi);
struct fb_var_screeninfo *var = &fbi->var;
struct omap_overlay *ovl;
u16 posx, posy;
u16 outw, outh;
int i;
#ifdef DEBUG
if (omapfb_test_pattern)
fill_fb(fbi);
#endif
WARN_ON(!atomic_read(&ofbi->region->lock_count));
for (i = 0; i < ofbi->num_overlays; i++) {
ovl = ofbi->overlays[i];
DBG("apply_changes, fb %d, ovl %d\n", ofbi->id, ovl->id);
if (ofbi->region->size == 0) {
/* the fb is not available. disable the overlay */
omapfb_overlay_enable(ovl, 0);
if (!init && ovl->manager)
ovl->manager->apply(ovl->manager);
continue;
}
if (init || (ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
int rotation = (var->rotate + ofbi->rotation[i]) % 4;
if (rotation == FB_ROTATE_CW ||
rotation == FB_ROTATE_CCW) {
outw = var->yres;
outh = var->xres;
} else {
outw = var->xres;
outh = var->yres;
}
} else {
struct omap_overlay_info info;
ovl->get_overlay_info(ovl, &info);
outw = info.out_width;
outh = info.out_height;
}
if (init) {
posx = 0;
posy = 0;
} else {
struct omap_overlay_info info;
ovl->get_overlay_info(ovl, &info);
posx = info.pos_x;
posy = info.pos_y;
}
r = omapfb_setup_overlay(fbi, ovl, posx, posy, outw, outh);
if (r)
goto err;
if (!init && ovl->manager)
ovl->manager->apply(ovl->manager);
}
return 0;
err:
DBG("apply_changes failed\n");
return r;
}
/* checks var and eventually tweaks it to something supported,
* DO NOT MODIFY PAR */
static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
int r;
DBG("check_var(%d)\n", FB2OFB(fbi)->id);
omapfb_get_mem_region(ofbi->region);
r = check_fb_var(fbi, var);
omapfb_put_mem_region(ofbi->region);
return r;
}
/* set the video mode according to info->var */
static int omapfb_set_par(struct fb_info *fbi)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
int r;
DBG("set_par(%d)\n", FB2OFB(fbi)->id);
omapfb_get_mem_region(ofbi->region);
set_fb_fix(fbi);
r = setup_vrfb_rotation(fbi);
if (r)
goto out;
r = omapfb_apply_changes(fbi, 0);
out:
omapfb_put_mem_region(ofbi->region);
return r;
}
static int omapfb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *fbi)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
struct fb_var_screeninfo new_var;
int r;
DBG("pan_display(%d)\n", FB2OFB(fbi)->id);
if (var->xoffset == fbi->var.xoffset &&
var->yoffset == fbi->var.yoffset)
return 0;
new_var = fbi->var;
new_var.xoffset = var->xoffset;
new_var.yoffset = var->yoffset;
fbi->var = new_var;
omapfb_get_mem_region(ofbi->region);
r = omapfb_apply_changes(fbi, 0);
omapfb_put_mem_region(ofbi->region);
return r;
}
static void mmap_user_open(struct vm_area_struct *vma)
{
struct omapfb2_mem_region *rg = vma->vm_private_data;
omapfb_get_mem_region(rg);
atomic_inc(&rg->map_count);
omapfb_put_mem_region(rg);
}
static void mmap_user_close(struct vm_area_struct *vma)
{
struct omapfb2_mem_region *rg = vma->vm_private_data;
omapfb_get_mem_region(rg);
atomic_dec(&rg->map_count);
omapfb_put_mem_region(rg);
}
static const struct vm_operations_struct mmap_user_ops = {
.open = mmap_user_open,
.close = mmap_user_close,
};
static int omapfb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
struct fb_fix_screeninfo *fix = &fbi->fix;
struct omapfb2_mem_region *rg;
unsigned long start;
u32 len;
int r;
rg = omapfb_get_mem_region(ofbi->region);
start = omapfb_get_region_paddr(ofbi);
len = fix->smem_len;
DBG("user mmap region start %lx, len %d, off %lx\n", start, len,
vma->vm_pgoff << PAGE_SHIFT);
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
vma->vm_ops = &mmap_user_ops;
vma->vm_private_data = rg;
r = vm_iomap_memory(vma, start, len);
if (r)
goto error;
/* vm_ops.open won't be called for mmap itself. */
atomic_inc(&rg->map_count);
omapfb_put_mem_region(rg);
return 0;
error:
omapfb_put_mem_region(ofbi->region);
return r;
}
/* 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 *fbi, u_int regno, u_int red, u_int green,
u_int blue, u_int transp, int update_hw_pal)
{
/*struct omapfb_info *ofbi = FB2OFB(fbi);*/
/*struct omapfb2_device *fbdev = ofbi->fbdev;*/
struct fb_var_screeninfo *var = &fbi->var;
int r = 0;
enum omapfb_color_format mode = OMAPFB_COLOR_RGB24U; /* XXX */
/*switch (plane->color_mode) {*/
switch (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);
*/
r = -EINVAL;
break;
case OMAPFB_COLOR_RGB565:
case OMAPFB_COLOR_RGB444:
case OMAPFB_COLOR_RGB24P:
case OMAPFB_COLOR_RGB24U:
if (regno < 16) {
u32 pal;
pal = ((red >> (16 - var->red.length)) <<
var->red.offset) |
((green >> (16 - var->green.length)) <<
var->green.offset) |
(blue >> (16 - var->blue.length));
((u32 *)(fbi->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)
{
DBG("setcolreg\n");
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;
DBG("setcmap\n");
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_blank(int blank, struct fb_info *fbi)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
struct omapfb2_device *fbdev = ofbi->fbdev;
struct omap_dss_device *display = fb2display(fbi);
struct omapfb_display_data *d;
int r = 0;
if (!display)
return -EINVAL;
omapfb_lock(fbdev);
d = get_display_data(fbdev, display);
switch (blank) {
case FB_BLANK_UNBLANK:
if (display->state == OMAP_DSS_DISPLAY_ACTIVE)
goto exit;
r = display->driver->enable(display);
if ((display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) &&
d->update_mode == OMAPFB_AUTO_UPDATE &&
!d->auto_update_work_enabled)
omapfb_start_auto_update(fbdev, display);
break;
case FB_BLANK_NORMAL:
/* FB_BLANK_NORMAL could be implemented.
* Needs DSS additions. */
case FB_BLANK_VSYNC_SUSPEND:
case FB_BLANK_HSYNC_SUSPEND:
case FB_BLANK_POWERDOWN:
if (display->state != OMAP_DSS_DISPLAY_ACTIVE)
goto exit;
if (d->auto_update_work_enabled)
omapfb_stop_auto_update(fbdev, display);
display->driver->disable(display);
break;
default:
r = -EINVAL;
}
exit:
omapfb_unlock(fbdev);
return r;
}
#if 0
/* XXX fb_read and fb_write are needed for VRFB */
ssize_t omapfb_write(struct fb_info *info, const char __user *buf,
size_t count, loff_t *ppos)
{
DBG("omapfb_write %d, %lu\n", count, (unsigned long)*ppos);
/* XXX needed for VRFB */
return count;
}
#endif
static const struct fb_ops omapfb_ops = {
.owner = THIS_MODULE,
.fb_open = omapfb_open,
.fb_release = omapfb_release,
.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,
.fb_mmap = omapfb_mmap,
.fb_setcolreg = omapfb_setcolreg,
.fb_setcmap = omapfb_setcmap,
/*.fb_write = omapfb_write,*/
};
static void omapfb_free_fbmem(struct fb_info *fbi)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
struct omapfb2_device *fbdev = ofbi->fbdev;
struct omapfb2_mem_region *rg;
rg = ofbi->region;
if (rg->token == NULL)
return;
WARN_ON(atomic_read(&rg->map_count));
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
/* unmap the 0 angle rotation */
if (rg->vrfb.vaddr[0]) {
iounmap(rg->vrfb.vaddr[0]);
rg->vrfb.vaddr[0] = NULL;
}
omap_vrfb_release_ctx(&rg->vrfb);
}
dma_free_attrs(fbdev->dev, rg->size, rg->token, rg->dma_handle,
rg->attrs);
rg->token = NULL;
rg->vaddr = NULL;
rg->paddr = 0;
rg->alloc = 0;
rg->size = 0;
}
static void clear_fb_info(struct fb_info *fbi)
{
memset(&fbi->var, 0, sizeof(fbi->var));
memset(&fbi->fix, 0, sizeof(fbi->fix));
strscpy(fbi->fix.id, MODULE_NAME, sizeof(fbi->fix.id));
}
static int omapfb_free_all_fbmem(struct omapfb2_device *fbdev)
{
int i;
DBG("free all fbmem\n");
for (i = 0; i < fbdev->num_fbs; i++) {
struct fb_info *fbi = fbdev->fbs[i];
omapfb_free_fbmem(fbi);
clear_fb_info(fbi);
}
return 0;
}
static int omapfb_alloc_fbmem(struct fb_info *fbi, unsigned long size,
unsigned long paddr)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
struct omapfb2_device *fbdev = ofbi->fbdev;
struct omapfb2_mem_region *rg;
void *token;
unsigned long attrs;
dma_addr_t dma_handle;
int r;
rg = ofbi->region;
rg->paddr = 0;
rg->vaddr = NULL;
memset(&rg->vrfb, 0, sizeof rg->vrfb);
rg->size = 0;
rg->type = 0;
rg->alloc = false;
rg->map = false;
size = PAGE_ALIGN(size);
attrs = DMA_ATTR_WRITE_COMBINE;
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
DBG("allocating %lu bytes for fb %d\n", size, ofbi->id);
token = dma_alloc_attrs(fbdev->dev, size, &dma_handle,
GFP_KERNEL, attrs);
if (token == NULL) {
dev_err(fbdev->dev, "failed to allocate framebuffer\n");
return -ENOMEM;
}
DBG("allocated VRAM paddr %lx, vaddr %p\n",
(unsigned long)dma_handle, token);
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
r = omap_vrfb_request_ctx(&rg->vrfb);
if (r) {
dma_free_attrs(fbdev->dev, size, token, dma_handle,
attrs);
dev_err(fbdev->dev, "vrfb create ctx failed\n");
return r;
}
}
rg->attrs = attrs;
rg->token = token;
rg->dma_handle = dma_handle;
rg->paddr = (unsigned long)dma_handle;
rg->vaddr = (void __iomem *)token;
rg->size = size;
rg->alloc = 1;
return 0;
}
/* allocate fbmem using display resolution as reference */
static int omapfb_alloc_fbmem_display(struct fb_info *fbi, unsigned long size,
unsigned long paddr)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
struct omapfb2_device *fbdev = ofbi->fbdev;
struct omap_dss_device *display;
int bytespp;
display = fb2display(fbi);
if (!display)
return 0;
switch (omapfb_get_recommended_bpp(fbdev, display)) {
case 16:
bytespp = 2;
break;
case 24:
bytespp = 4;
break;
default:
bytespp = 4;
break;
}
if (!size) {
u16 w, h;
display->driver->get_resolution(display, &w, &h);
if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
size = max(omap_vrfb_min_phys_size(w, h, bytespp),
omap_vrfb_min_phys_size(h, w, bytespp));
DBG("adjusting fb mem size for VRFB, %u -> %lu\n",
w * h * bytespp, size);
} else {
size = w * h * bytespp;
}
}
if (!size)
return 0;
return omapfb_alloc_fbmem(fbi, size, paddr);
}
static int omapfb_parse_vram_param(const char *param, int max_entries,
unsigned long *sizes, unsigned long *paddrs)
{
unsigned int fbnum;
unsigned long size;
unsigned long paddr = 0;
char *p, *start;
start = (char *)param;
while (1) {
p = start;
fbnum = simple_strtoul(p, &p, 10);
if (p == start)
return -EINVAL;
if (*p != ':')
return -EINVAL;
if (fbnum >= max_entries)
return -EINVAL;
size = memparse(p + 1, &p);
if (!size)
return -EINVAL;
paddr = 0;
if (*p == '@') {
paddr = simple_strtoul(p + 1, &p, 16);
if (!paddr)
return -EINVAL;
}
WARN_ONCE(paddr,
"reserving memory at predefined address not supported\n");
paddrs[fbnum] = paddr;
sizes[fbnum] = size;
if (*p == 0)
break;
if (*p != ',')
return -EINVAL;
++p;
start = p;
}
return 0;
}
static int omapfb_allocate_all_fbs(struct omapfb2_device *fbdev)
{
int i, r;
unsigned long vram_sizes[10];
unsigned long vram_paddrs[10];
memset(&vram_sizes, 0, sizeof(vram_sizes));
memset(&vram_paddrs, 0, sizeof(vram_paddrs));
if (def_vram && omapfb_parse_vram_param(def_vram, 10,
vram_sizes, vram_paddrs)) {
dev_err(fbdev->dev, "failed to parse vram parameter\n");
memset(&vram_sizes, 0, sizeof(vram_sizes));
memset(&vram_paddrs, 0, sizeof(vram_paddrs));
}
for (i = 0; i < fbdev->num_fbs; i++) {
/* allocate memory automatically only for fb0, or if
* excplicitly defined with vram or plat data option */
if (i == 0 || vram_sizes[i] != 0) {
r = omapfb_alloc_fbmem_display(fbdev->fbs[i],
vram_sizes[i], vram_paddrs[i]);
if (r)
return r;
}
}
for (i = 0; i < fbdev->num_fbs; i++) {
struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
struct omapfb2_mem_region *rg;
rg = ofbi->region;
DBG("region%d phys %08x virt %p size=%lu\n",
i,
rg->paddr,
rg->vaddr,
rg->size);
}
return 0;
}
static void omapfb_clear_fb(struct fb_info *fbi)
{
const struct fb_fillrect rect = {
.dx = 0,
.dy = 0,
.width = fbi->var.xres_virtual,
.height = fbi->var.yres_virtual,
.color = 0,
.rop = ROP_COPY,
};
cfb_fillrect(fbi, &rect);
}
int omapfb_realloc_fbmem(struct fb_info *fbi, unsigned long size, int type)
{
struct omapfb_info *ofbi = FB2OFB(fbi);
struct omapfb2_device *fbdev = ofbi->fbdev;
struct omapfb2_mem_region *rg = ofbi->region;
unsigned long old_size = rg->size;
unsigned long old_paddr = rg->paddr;
int old_type = rg->type;
int r;
if (type != OMAPFB_MEMTYPE_SDRAM)
return -EINVAL;
size = PAGE_ALIGN(size);
if (old_size == size && old_type == type)
return 0;
omapfb_free_fbmem(fbi);
if (size == 0) {
clear_fb_info(fbi);
return 0;
}
r = omapfb_alloc_fbmem(fbi, size, 0);
if (r) {
if (old_size)
omapfb_alloc_fbmem(fbi, old_size, old_paddr);
if (rg->size == 0)
clear_fb_info(fbi);
return r;
}
if (old_size == size)
return 0;
if (old_size == 0) {
DBG("initializing fb %d\n", ofbi->id);
r = omapfb_fb_init(fbdev, fbi);
if (r) {
DBG("omapfb_fb_init failed\n");
goto err;
}
r = omapfb_apply_changes(fbi, 1);
if (r) {
DBG("omapfb_apply_changes failed\n");
goto err;
}
} else {
struct fb_var_screeninfo new_var;
memcpy(&new_var, &fbi->var, sizeof(new_var));
r = check_fb_var(fbi, &new_var);
if (r)
goto err;
memcpy(&fbi->var, &new_var, sizeof(fbi->var));
set_fb_fix(fbi);
r = setup_vrfb_rotation(fbi);
if (r)
goto err;
}
omapfb_clear_fb(fbi);
return 0;
err:
omapfb_free_fbmem(fbi);
clear_fb_info(fbi);
return r;
}
static void omapfb_auto_update_work(struct work_struct *work)
{
struct omap_dss_device *dssdev;
struct omap_dss_driver *dssdrv;
struct omapfb_display_data *d;
u16 w, h;
unsigned int freq;
struct omapfb2_device *fbdev;
d = container_of(work, struct omapfb_display_data,
auto_update_work.work);
dssdev = d->dssdev;
dssdrv = dssdev->driver;
fbdev = d->fbdev;
if (!dssdrv || !dssdrv->update)
return;
if (dssdrv->sync)
dssdrv->sync(dssdev);
dssdrv->get_resolution(dssdev, &w, &h);
dssdrv->update(dssdev, 0, 0, w, h);
freq = auto_update_freq;
if (freq == 0)
freq = 20;
queue_delayed_work(fbdev->auto_update_wq,
&d->auto_update_work, HZ / freq);
}
void omapfb_start_auto_update(struct omapfb2_device *fbdev,
struct omap_dss_device *display)
{
struct omapfb_display_data *d;
if (fbdev->auto_update_wq == NULL) {
struct workqueue_struct *wq;
wq = create_singlethread_workqueue("omapfb_auto_update");
if (wq == NULL) {
dev_err(fbdev->dev, "Failed to create workqueue for "
"auto-update\n");
return;
}
fbdev->auto_update_wq = wq;
}
d = get_display_data(fbdev, display);
INIT_DELAYED_WORK(&d->auto_update_work, omapfb_auto_update_work);
d->auto_update_work_enabled = true;
omapfb_auto_update_work(&d->auto_update_work.work);
}
void omapfb_stop_auto_update(struct omapfb2_device *fbdev,
struct omap_dss_device *display)
{
struct omapfb_display_data *d;
d = get_display_data(fbdev, display);
cancel_delayed_work_sync(&d->auto_update_work);
d->auto_update_work_enabled = false;
}
/* initialize fb_info, var, fix to something sane based on the display */
static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi)
{
struct fb_var_screeninfo *var = &fbi->var;
struct omap_dss_device *display = fb2display(fbi);
struct omapfb_info *ofbi = FB2OFB(fbi);
int r = 0;
fbi->fbops = &omapfb_ops;
fbi->flags = FBINFO_FLAG_DEFAULT;
fbi->pseudo_palette = fbdev->pseudo_palette;
if (ofbi->region->size == 0) {
clear_fb_info(fbi);
return 0;
}
var->nonstd = 0;
var->bits_per_pixel = 0;
var->rotate = def_rotate;
if (display) {
u16 w, h;
int rotation = (var->rotate + ofbi->rotation[0]) % 4;
display->driver->get_resolution(display, &w, &h);
if (rotation == FB_ROTATE_CW ||
rotation == FB_ROTATE_CCW) {
var->xres = h;
var->yres = w;
} else {
var->xres = w;
var->yres = h;
}
var->xres_virtual = var->xres;
var->yres_virtual = var->yres;
if (!var->bits_per_pixel) {
switch (omapfb_get_recommended_bpp(fbdev, display)) {
case 16:
var->bits_per_pixel = 16;
break;
case 24:
var->bits_per_pixel = 32;
break;
default:
dev_err(fbdev->dev, "illegal display "
"bpp\n");
return -EINVAL;
}
}
} else {
/* if there's no display, let's just guess some basic values */
var->xres = 320;
var->yres = 240;
var->xres_virtual = var->xres;
var->yres_virtual = var->yres;
if (!var->bits_per_pixel)
var->bits_per_pixel = 16;
}
r = check_fb_var(fbi, var);
if (r)
goto err;
set_fb_fix(fbi);
r = setup_vrfb_rotation(fbi);
if (r)
goto err;
r = fb_alloc_cmap(&fbi->cmap, 256, 0);
if (r)
dev_err(fbdev->dev, "unable to allocate color map memory\n");
err:
return r;
}
static void fbinfo_cleanup(struct omapfb2_device *fbdev, struct fb_info *fbi)
{
fb_dealloc_cmap(&fbi->cmap);
}
static void omapfb_free_resources(struct omapfb2_device *fbdev)
{
int i;
DBG("free_resources\n");
if (fbdev == NULL)
return;
for (i = 0; i < fbdev->num_overlays; i++) {
struct omap_overlay *ovl = fbdev->overlays[i];
ovl->disable(ovl);
if (ovl->manager)
ovl->unset_manager(ovl);
}
for (i = 0; i < fbdev->num_fbs; i++)
unregister_framebuffer(fbdev->fbs[i]);
/* free the reserved fbmem */
omapfb_free_all_fbmem(fbdev);
for (i = 0; i < fbdev->num_fbs; i++) {
fbinfo_cleanup(fbdev, fbdev->fbs[i]);
framebuffer_release(fbdev->fbs[i]);
}
for (i = 0; i < fbdev->num_displays; i++) {
struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
if (fbdev->displays[i].auto_update_work_enabled)
omapfb_stop_auto_update(fbdev, dssdev);
if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
dssdev->driver->disable(dssdev);
dssdev->driver->disconnect(dssdev);
omap_dss_put_device(dssdev);
}
if (fbdev->auto_update_wq != NULL) {
destroy_workqueue(fbdev->auto_update_wq);
fbdev->auto_update_wq = NULL;
}
dev_set_drvdata(fbdev->dev, NULL);
}
static int omapfb_create_framebuffers(struct omapfb2_device *fbdev)
{
int r, i;
fbdev->num_fbs = 0;
DBG("create %d framebuffers\n", CONFIG_FB_OMAP2_NUM_FBS);
/* allocate fb_infos */
for (i = 0; i < CONFIG_FB_OMAP2_NUM_FBS; i++) {
struct fb_info *fbi;
struct omapfb_info *ofbi;
fbi = framebuffer_alloc(sizeof(struct omapfb_info),
fbdev->dev);
if (!fbi)
return -ENOMEM;
clear_fb_info(fbi);
fbdev->fbs[i] = fbi;
ofbi = FB2OFB(fbi);
ofbi->fbdev = fbdev;
ofbi->id = i;
ofbi->region = &fbdev->regions[i];
ofbi->region->id = i;
init_rwsem(&ofbi->region->lock);
/* assign these early, so that fb alloc can use them */
ofbi->rotation_type = def_vrfb ? OMAP_DSS_ROT_VRFB :
OMAP_DSS_ROT_DMA;
ofbi->mirror = def_mirror;
fbdev->num_fbs++;
}
DBG("fb_infos allocated\n");
/* assign overlays for the fbs */
for (i = 0; i < min(fbdev->num_fbs, fbdev->num_overlays); i++) {
struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
ofbi->overlays[0] = fbdev->overlays[i];
ofbi->num_overlays = 1;
}
/* allocate fb memories */
r = omapfb_allocate_all_fbs(fbdev);
if (r) {
dev_err(fbdev->dev, "failed to allocate fbmem\n");
return r;
}
DBG("fbmems allocated\n");
/* setup fb_infos */
for (i = 0; i < fbdev->num_fbs; i++) {
struct fb_info *fbi = fbdev->fbs[i];
struct omapfb_info *ofbi = FB2OFB(fbi);
omapfb_get_mem_region(ofbi->region);
r = omapfb_fb_init(fbdev, fbi);
omapfb_put_mem_region(ofbi->region);
if (r) {
dev_err(fbdev->dev, "failed to setup fb_info\n");
return r;
}
}
for (i = 0; i < fbdev->num_fbs; i++) {
struct fb_info *fbi = fbdev->fbs[i];
struct omapfb_info *ofbi = FB2OFB(fbi);
if (ofbi->region->size == 0)
continue;
omapfb_clear_fb(fbi);
}
DBG("fb_infos initialized\n");
for (i = 0; i < fbdev->num_fbs; i++) {
r = register_framebuffer(fbdev->fbs[i]);
if (r != 0) {
dev_err(fbdev->dev,
"registering framebuffer %d failed\n", i);
return r;
}
}
DBG("framebuffers registered\n");
for (i = 0; i < fbdev->num_fbs; i++) {
struct fb_info *fbi = fbdev->fbs[i];
struct omapfb_info *ofbi = FB2OFB(fbi);
omapfb_get_mem_region(ofbi->region);
r = omapfb_apply_changes(fbi, 1);
omapfb_put_mem_region(ofbi->region);
if (r) {
dev_err(fbdev->dev, "failed to change mode\n");
return r;
}
}
/* Enable fb0 */
if (fbdev->num_fbs > 0) {
struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[0]);
if (ofbi->num_overlays > 0) {
struct omap_overlay *ovl = ofbi->overlays[0];
ovl->manager->apply(ovl->manager);
r = omapfb_overlay_enable(ovl, 1);
if (r) {
dev_err(fbdev->dev,
"failed to enable overlay\n");
return r;
}
}
}
DBG("create_framebuffers done\n");
return 0;
}
static int omapfb_mode_to_timings(const char *mode_str,
struct omap_dss_device *display,
struct omap_video_timings *timings, u8 *bpp)
{
struct fb_info *fbi;
struct fb_var_screeninfo *var;
struct fb_ops *fbops;
int r;
#ifdef CONFIG_OMAP2_DSS_VENC
if (strcmp(mode_str, "pal") == 0) {
*timings = omap_dss_pal_timings;
*bpp = 24;
return 0;
} else if (strcmp(mode_str, "ntsc") == 0) {
*timings = omap_dss_ntsc_timings;
*bpp = 24;
return 0;
}
#endif
/* this is quite a hack, but I wanted to use the modedb and for
* that we need fb_info and var, so we create dummy ones */
*bpp = 0;
fbi = NULL;
var = NULL;
fbops = NULL;
fbi = kzalloc(sizeof(*fbi), GFP_KERNEL);
if (fbi == NULL) {
r = -ENOMEM;
goto err;
}
var = kzalloc(sizeof(*var), GFP_KERNEL);
if (var == NULL) {
r = -ENOMEM;
goto err;
}
fbops = kzalloc(sizeof(*fbops), GFP_KERNEL);
if (fbops == NULL) {
r = -ENOMEM;
goto err;
}
fbi->fbops = fbops;
r = fb_find_mode(var, fbi, mode_str, NULL, 0, NULL, 24);
if (r == 0) {
r = -EINVAL;
goto err;
}
if (display->driver->get_timings) {
display->driver->get_timings(display, timings);
} else {
timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
}
timings->pixelclock = PICOS2KHZ(var->pixclock) * 1000;
timings->hbp = var->left_margin;
timings->hfp = var->right_margin;
timings->vbp = var->upper_margin;
timings->vfp = var->lower_margin;
timings->hsw = var->hsync_len;
timings->vsw = var->vsync_len;
timings->x_res = var->xres;
timings->y_res = var->yres;
timings->hsync_level = var->sync & FB_SYNC_HOR_HIGH_ACT ?
OMAPDSS_SIG_ACTIVE_HIGH :
OMAPDSS_SIG_ACTIVE_LOW;
timings->vsync_level = var->sync & FB_SYNC_VERT_HIGH_ACT ?
OMAPDSS_SIG_ACTIVE_HIGH :
OMAPDSS_SIG_ACTIVE_LOW;
timings->interlace = var->vmode & FB_VMODE_INTERLACED;
switch (var->bits_per_pixel) {
case 16:
*bpp = 16;
break;
case 24:
case 32:
default:
*bpp = 24;
break;
}
r = 0;
err:
kfree(fbi);
kfree(var);
kfree(fbops);
return r;
}
static int omapfb_set_def_mode(struct omapfb2_device *fbdev,
struct omap_dss_device *display, char *mode_str)
{
int r;
u8 bpp;
struct omap_video_timings timings, temp_timings;
struct omapfb_display_data *d;
r = omapfb_mode_to_timings(mode_str, display, &timings, &bpp);
if (r)
return r;
d = get_display_data(fbdev, display);
d->bpp_override = bpp;
if (display->driver->check_timings) {
r = display->driver->check_timings(display, &timings);
if (r)
return r;
} else {
/* If check_timings is not present compare xres and yres */
if (display->driver->get_timings) {
display->driver->get_timings(display, &temp_timings);
if (temp_timings.x_res != timings.x_res ||
temp_timings.y_res != timings.y_res)
return -EINVAL;
}
}
if (display->driver->set_timings)
display->driver->set_timings(display, &timings);
return 0;
}
static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
struct omap_dss_device *dssdev)
{
struct omapfb_display_data *d;
BUG_ON(dssdev->driver->get_recommended_bpp == NULL);
d = get_display_data(fbdev, dssdev);
if (d->bpp_override != 0)
return d->bpp_override;
return dssdev->driver->get_recommended_bpp(dssdev);
}
static int omapfb_parse_def_modes(struct omapfb2_device *fbdev)
{
char *str, *options, *this_opt;
int r = 0;
str = kstrdup(def_mode, GFP_KERNEL);
if (!str)
return -ENOMEM;
options = str;
while (!r && (this_opt = strsep(&options, ",")) != NULL) {
char *p, *display_str, *mode_str;
struct omap_dss_device *display;
int i;
p = strchr(this_opt, ':');
if (!p) {
r = -EINVAL;
break;
}
*p = 0;
display_str = this_opt;
mode_str = p + 1;
display = NULL;
for (i = 0; i < fbdev->num_displays; ++i) {
if (strcmp(fbdev->displays[i].dssdev->name,
display_str) == 0) {
display = fbdev->displays[i].dssdev;
break;
}
}
if (!display) {
r = -EINVAL;
break;
}
r = omapfb_set_def_mode(fbdev, display, mode_str);
if (r)
break;
}
kfree(str);
return r;
}
static void fb_videomode_to_omap_timings(struct fb_videomode *m,
struct omap_dss_device *display,
struct omap_video_timings *t)
{
if (display->driver->get_timings) {
display->driver->get_timings(display, t);
} else {
t->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
t->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
t->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
}
t->x_res = m->xres;
t->y_res = m->yres;
t->pixelclock = PICOS2KHZ(m->pixclock) * 1000;
t->hsw = m->hsync_len;
t->hfp = m->right_margin;
t->hbp = m->left_margin;
t->vsw = m->vsync_len;
t->vfp = m->lower_margin;
t->vbp = m->upper_margin;
t->hsync_level = m->sync & FB_SYNC_HOR_HIGH_ACT ?
OMAPDSS_SIG_ACTIVE_HIGH :
OMAPDSS_SIG_ACTIVE_LOW;
t->vsync_level = m->sync & FB_SYNC_VERT_HIGH_ACT ?
OMAPDSS_SIG_ACTIVE_HIGH :
OMAPDSS_SIG_ACTIVE_LOW;
t->interlace = m->vmode & FB_VMODE_INTERLACED;
}
static int omapfb_find_best_mode(struct omap_dss_device *display,
struct omap_video_timings *timings)
{
struct fb_monspecs *specs;
u8 *edid;
int r, i, best_idx, len;
if (!display->driver->read_edid)
return -ENODEV;
len = 0x80 * 2;
edid = kmalloc(len, GFP_KERNEL);
if (edid == NULL)
return -ENOMEM;
r = display->driver->read_edid(display, edid, len);
if (r < 0)
goto err1;
specs = kzalloc(sizeof(*specs), GFP_KERNEL);
if (specs == NULL) {
r = -ENOMEM;
goto err1;
}
fb_edid_to_monspecs(edid, specs);
best_idx = -1;
for (i = 0; i < specs->modedb_len; ++i) {
struct fb_videomode *m;
struct omap_video_timings t;
m = &specs->modedb[i];
if (m->pixclock == 0)
continue;
/* skip repeated pixel modes */
if (m->xres == 2880 || m->xres == 1440)
continue;
if (m->vmode & FB_VMODE_INTERLACED ||
m->vmode & FB_VMODE_DOUBLE)
continue;
fb_videomode_to_omap_timings(m, display, &t);
r = display->driver->check_timings(display, &t);
if (r == 0) {
best_idx = i;
break;
}
}
if (best_idx == -1) {
r = -ENOENT;
goto err2;
}
fb_videomode_to_omap_timings(&specs->modedb[best_idx], display,
timings);
r = 0;
err2:
fb_destroy_modedb(specs->modedb);
kfree(specs);
err1:
kfree(edid);
return r;
}
static int omapfb_init_display(struct omapfb2_device *fbdev,
struct omap_dss_device *dssdev)
{
struct omap_dss_driver *dssdrv = dssdev->driver;
struct omapfb_display_data *d;
int r;
r = dssdrv->enable(dssdev);
if (r) {
dev_warn(fbdev->dev, "Failed to enable display '%s'\n",
dssdev->name);
return r;
}
d = get_display_data(fbdev, dssdev);
d->fbdev = fbdev;
if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
u16 w, h;
if (auto_update) {
omapfb_start_auto_update(fbdev, dssdev);
d->update_mode = OMAPFB_AUTO_UPDATE;
} else {
d->update_mode = OMAPFB_MANUAL_UPDATE;
}
if (dssdrv->enable_te) {
r = dssdrv->enable_te(dssdev, 1);
if (r) {
dev_err(fbdev->dev, "Failed to set TE\n");
return r;
}
}
dssdrv->get_resolution(dssdev, &w, &h);
r = dssdrv->update(dssdev, 0, 0, w, h);
if (r) {
dev_err(fbdev->dev,
"Failed to update display\n");
return r;
}
} else {
d->update_mode = OMAPFB_AUTO_UPDATE;
}
return 0;
}
static int omapfb_init_connections(struct omapfb2_device *fbdev,
struct omap_dss_device *def_dssdev)
{
int i, r;
struct omap_overlay_manager *mgr;
r = def_dssdev->driver->connect(def_dssdev);
if (r) {
dev_err(fbdev->dev, "failed to connect default display\n");
return r;
}
for (i = 0; i < fbdev->num_displays; ++i) {
struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
if (dssdev == def_dssdev)
continue;
/*
* We don't care if the connect succeeds or not. We just want to
* connect as many displays as possible.
*/
dssdev->driver->connect(dssdev);
}
mgr = omapdss_find_mgr_from_display(def_dssdev);
if (!mgr) {
dev_err(fbdev->dev, "no ovl manager for the default display\n");
return -EINVAL;
}
for (i = 0; i < fbdev->num_overlays; i++) {
struct omap_overlay *ovl = fbdev->overlays[i];
if (ovl->manager)
ovl->unset_manager(ovl);
r = ovl->set_manager(ovl, mgr);
if (r)
dev_warn(fbdev->dev,
"failed to connect overlay %s to manager %s\n",
ovl->name, mgr->name);
}
return 0;
}
static struct omap_dss_device *
omapfb_find_default_display(struct omapfb2_device *fbdev)
{
const char *def_name;
int i;
/*
* Search with the display name from the user or the board file,
* comparing to display names and aliases
*/
def_name = omapdss_get_default_display_name();
if (def_name) {
for (i = 0; i < fbdev->num_displays; ++i) {
struct omap_dss_device *dssdev;
dssdev = fbdev->displays[i].dssdev;
if (dssdev->name && strcmp(def_name, dssdev->name) == 0)
return dssdev;
if (strcmp(def_name, dssdev->alias) == 0)
return dssdev;
}
/* def_name given but not found */
return NULL;
}
/* then look for DT alias display0 */
for (i = 0; i < fbdev->num_displays; ++i) {
struct omap_dss_device *dssdev;
int id;
dssdev = fbdev->displays[i].dssdev;
if (dssdev->dev->of_node == NULL)
continue;
id = of_alias_get_id(dssdev->dev->of_node, "display");
if (id == 0)
return dssdev;
}
/* return the first display we have in the list */
return fbdev->displays[0].dssdev;
}
static int omapfb_probe(struct platform_device *pdev)
{
struct omapfb2_device *fbdev = NULL;
int r = 0;
int i;
struct omap_dss_device *def_display;
struct omap_dss_device *dssdev;
DBG("omapfb_probe\n");
if (omapdss_is_initialized() == false)
return -EPROBE_DEFER;
if (pdev->num_resources != 0) {
dev_err(&pdev->dev, "probed for an unknown device\n");
r = -ENODEV;
goto err0;
}
fbdev = devm_kzalloc(&pdev->dev, sizeof(struct omapfb2_device),
GFP_KERNEL);
if (fbdev == NULL) {
r = -ENOMEM;
goto err0;
}
if (def_vrfb && !omap_vrfb_supported()) {
def_vrfb = 0;
dev_warn(&pdev->dev, "VRFB is not supported on this hardware, "
"ignoring the module parameter vrfb=y\n");
}
r = omapdss_compat_init();
if (r)
goto err0;
mutex_init(&fbdev->mtx);
fbdev->dev = &pdev->dev;
platform_set_drvdata(pdev, fbdev);
fbdev->num_displays = 0;
dssdev = NULL;
for_each_dss_dev(dssdev) {
struct omapfb_display_data *d;
omap_dss_get_device(dssdev);
if (!dssdev->driver) {
dev_warn(&pdev->dev, "no driver for display: %s\n",
dssdev->name);
omap_dss_put_device(dssdev);
continue;
}
d = &fbdev->displays[fbdev->num_displays++];
d->dssdev = dssdev;
if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE)
d->update_mode = OMAPFB_MANUAL_UPDATE;
else
d->update_mode = OMAPFB_AUTO_UPDATE;
}
if (fbdev->num_displays == 0) {
dev_err(&pdev->dev, "no displays\n");
r = -EPROBE_DEFER;
goto cleanup;
}
fbdev->num_overlays = omap_dss_get_num_overlays();
for (i = 0; i < fbdev->num_overlays; i++)
fbdev->overlays[i] = omap_dss_get_overlay(i);
fbdev->num_managers = omap_dss_get_num_overlay_managers();
for (i = 0; i < fbdev->num_managers; i++)
fbdev->managers[i] = omap_dss_get_overlay_manager(i);
def_display = omapfb_find_default_display(fbdev);
if (def_display == NULL) {
dev_err(fbdev->dev, "failed to find default display\n");
r = -EPROBE_DEFER;
goto cleanup;
}
r = omapfb_init_connections(fbdev, def_display);
if (r) {
dev_err(fbdev->dev, "failed to init overlay connections\n");
goto cleanup;
}
if (def_mode && strlen(def_mode) > 0) {
if (omapfb_parse_def_modes(fbdev))
dev_warn(&pdev->dev, "cannot parse default modes\n");
} else if (def_display && def_display->driver->set_timings &&
def_display->driver->check_timings) {
struct omap_video_timings t;
r = omapfb_find_best_mode(def_display, &t);
if (r == 0)
def_display->driver->set_timings(def_display, &t);
}
r = omapfb_create_framebuffers(fbdev);
if (r)
goto cleanup;
for (i = 0; i < fbdev->num_managers; i++) {
struct omap_overlay_manager *mgr;
mgr = fbdev->managers[i];
r = mgr->apply(mgr);
if (r)
dev_warn(fbdev->dev, "failed to apply dispc config\n");
}
DBG("mgr->apply'ed\n");
if (def_display) {
r = omapfb_init_display(fbdev, def_display);
if (r) {
dev_err(fbdev->dev,
"failed to initialize default "
"display\n");
goto cleanup;
}
}
DBG("create sysfs for fbs\n");
r = omapfb_create_sysfs(fbdev);
if (r) {
dev_err(fbdev->dev, "failed to create sysfs entries\n");
goto cleanup;
}
if (def_display) {
u16 w, h;
def_display->driver->get_resolution(def_display, &w, &h);
dev_info(fbdev->dev, "using display '%s' mode %dx%d\n",
def_display->name, w, h);
}
return 0;
cleanup:
omapfb_free_resources(fbdev);
omapdss_compat_uninit();
err0:
dev_err(&pdev->dev, "failed to setup omapfb\n");
return r;
}
static int omapfb_remove(struct platform_device *pdev)
{
struct omapfb2_device *fbdev = platform_get_drvdata(pdev);
/* FIXME: wait till completion of pending events */
omapfb_remove_sysfs(fbdev);
omapfb_free_resources(fbdev);
omapdss_compat_uninit();
return 0;
}
static struct platform_driver omapfb_driver = {
.probe = omapfb_probe,
.remove = omapfb_remove,
.driver = {
.name = "omapfb",
},
};
module_param_named(mode, def_mode, charp, 0);
module_param_named(vram, def_vram, charp, 0);
module_param_named(rotate, def_rotate, int, 0);
module_param_named(vrfb, def_vrfb, bool, 0);
module_param_named(mirror, def_mirror, bool, 0);
module_platform_driver(omapfb_driver);
MODULE_ALIAS("platform:omapfb");
MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
MODULE_DESCRIPTION("OMAP2/3 Framebuffer");
MODULE_LICENSE("GPL v2");
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