#define DEFAULT_MODEDB_INDEX 0
-static const struct fb_videomode modedb[] = {
+static const __init struct fb_videomode modedb[] = {
{
/* 640x400 @ 70 Hz, 31.5 kHz hsync */
NULL, 70, 640, 400, 39721, 40, 24, 39, 9, 96, 2,
},
};
+#ifdef CONFIG_FB_MODE_HELPERS
const struct fb_videomode vesa_modes[] = {
/* 0 640x350-85 VESA */
{ NULL, 85, 640, 350, 31746, 96, 32, 60, 32, 64, 3,
{ NULL, 60, 1920, 1440, 3367, 352, 144, 56, 1, 224, 3,
FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
};
+EXPORT_SYMBOL(vesa_modes);
+#endif /* CONFIG_FB_MODE_HELPERS */
static int my_atoi(const char *name)
{
*/
int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
- const struct fb_videomode *mode, unsigned int bpp)
+ const struct fb_videomode *mode, unsigned int bpp)
{
int err = 0;
return 0;
}
-EXPORT_SYMBOL(vesa_modes);
+/**
+ * fb_var_to_videomode - convert fb_var_screeninfo to fb_videomode
+ * @mode: pointer to struct fb_videomode
+ * @var: pointer to struct fb_var_screeninfo
+ */
+void fb_var_to_videomode(struct fb_videomode *mode,
+ struct fb_var_screeninfo *var)
+{
+ u32 pixclock, hfreq, htotal, vtotal;
+
+ mode->name = NULL;
+ mode->xres = var->xres;
+ mode->yres = var->yres;
+ mode->pixclock = var->pixclock;
+ mode->hsync_len = var->hsync_len;
+ mode->vsync_len = var->vsync_len;
+ mode->left_margin = var->left_margin;
+ mode->right_margin = var->right_margin;
+ mode->upper_margin = var->upper_margin;
+ mode->lower_margin = var->lower_margin;
+ mode->sync = var->sync;
+ mode->vmode = var->vmode & FB_VMODE_MASK;
+ mode->flag = FB_MODE_IS_FROM_VAR;
+ if (!var->pixclock)
+ return;
+
+ pixclock = PICOS2KHZ(var->pixclock) * 1000;
+
+ htotal = var->xres + var->right_margin + var->hsync_len +
+ var->left_margin;
+ vtotal = var->yres + var->lower_margin + var->vsync_len +
+ var->upper_margin;
+
+ if (var->vmode & FB_VMODE_INTERLACED)
+ vtotal /= 2;
+ if (var->vmode & FB_VMODE_DOUBLE)
+ vtotal *= 2;
+
+ hfreq = pixclock/htotal;
+ mode->refresh = hfreq/vtotal;
+}
+
+/**
+ * fb_videomode_to_var - convert fb_videomode to fb_var_screeninfo
+ * @var: pointer to struct fb_var_screeninfo
+ * @mode: pointer to struct fb_videomode
+ */
+void fb_videomode_to_var(struct fb_var_screeninfo *var,
+ struct fb_videomode *mode)
+{
+ var->xres = mode->xres;
+ var->yres = mode->yres;
+ var->pixclock = mode->pixclock;
+ var->left_margin = mode->left_margin;
+ var->hsync_len = mode->hsync_len;
+ var->vsync_len = mode->vsync_len;
+ var->right_margin = mode->right_margin;
+ var->upper_margin = mode->upper_margin;
+ var->lower_margin = mode->lower_margin;
+ var->sync = mode->sync;
+ var->vmode = mode->vmode & FB_VMODE_MASK;
+}
+
+/**
+ * fb_mode_is_equal - compare 2 videomodes
+ * @mode1: first videomode
+ * @mode2: second videomode
+ *
+ * RETURNS:
+ * 1 if equal, 0 if not
+ */
+int fb_mode_is_equal(struct fb_videomode *mode1,
+ struct fb_videomode *mode2)
+{
+ return (mode1->xres == mode2->xres &&
+ mode1->yres == mode2->yres &&
+ mode1->pixclock == mode2->pixclock &&
+ mode1->hsync_len == mode2->hsync_len &&
+ mode1->vsync_len == mode2->vsync_len &&
+ mode1->left_margin == mode2->left_margin &&
+ mode1->right_margin == mode2->right_margin &&
+ mode1->upper_margin == mode2->upper_margin &&
+ mode1->lower_margin == mode2->lower_margin &&
+ mode1->sync == mode2->sync &&
+ mode1->vmode == mode2->vmode);
+}
+
+/**
+ * fb_find_best_mode - find best matching videomode
+ * @var: pointer to struct fb_var_screeninfo
+ * @head: pointer to struct list_head of modelist
+ *
+ * RETURNS:
+ * struct fb_videomode, NULL if none found
+ *
+ * IMPORTANT:
+ * This function assumes that all modelist entries in
+ * info->modelist are valid.
+ *
+ * NOTES:
+ * Finds best matching videomode which has an equal or greater dimension than
+ * var->xres and var->yres. If more than 1 videomode is found, will return
+ * the videomode with the highest refresh rate
+ */
+struct fb_videomode *fb_find_best_mode(struct fb_var_screeninfo *var,
+ struct list_head *head)
+{
+ struct list_head *pos;
+ struct fb_modelist *modelist;
+ struct fb_videomode *mode, *best = NULL;
+ u32 diff = -1;
+
+ list_for_each(pos, head) {
+ u32 d;
+
+ modelist = list_entry(pos, struct fb_modelist, list);
+ mode = &modelist->mode;
+
+ if (mode->xres >= var->xres && mode->yres >= var->yres) {
+ d = (mode->xres - var->xres) +
+ (mode->yres - var->yres);
+ if (diff > d) {
+ diff = d;
+ best = mode;
+ } else if (diff == d && mode->refresh > best->refresh)
+ best = mode;
+ }
+ }
+ return best;
+}
+
+/**
+ * fb_match_mode - find a videomode which exactly matches the timings in var
+ * @var: pointer to struct fb_var_screeninfo
+ * @head: pointer to struct list_head of modelist
+ *
+ * RETURNS:
+ * struct fb_videomode, NULL if none found
+ */
+struct fb_videomode *fb_match_mode(struct fb_var_screeninfo *var,
+ struct list_head *head)
+{
+ struct list_head *pos;
+ struct fb_modelist *modelist;
+ struct fb_videomode *m, mode;
+
+ fb_var_to_videomode(&mode, var);
+ list_for_each(pos, head) {
+ modelist = list_entry(pos, struct fb_modelist, list);
+ m = &modelist->mode;
+ if (fb_mode_is_equal(m, &mode))
+ return m;
+ }
+ return NULL;
+}
+
+/**
+ * fb_add_videomode: adds videomode entry to modelist
+ * @mode: videomode to add
+ * @head: struct list_head of modelist
+ *
+ * NOTES:
+ * Will only add unmatched mode entries
+ */
+int fb_add_videomode(struct fb_videomode *mode, struct list_head *head)
+{
+ struct list_head *pos;
+ struct fb_modelist *modelist;
+ struct fb_videomode *m;
+ int found = 0;
+
+ list_for_each(pos, head) {
+ modelist = list_entry(pos, struct fb_modelist, list);
+ m = &modelist->mode;
+ if (fb_mode_is_equal(m, mode)) {
+ found = 1;
+ break;
+ }
+ }
+ if (!found) {
+ modelist = kmalloc(sizeof(struct fb_modelist),
+ GFP_KERNEL);
+
+ if (!modelist)
+ return -ENOMEM;
+ modelist->mode = *mode;
+ list_add(&modelist->list, head);
+ }
+ return 0;
+}
+
+/**
+ * fb_delete_videomode: removed videomode entry from modelist
+ * @mode: videomode to remove
+ * @head: struct list_head of modelist
+ *
+ * NOTES:
+ * Will remove all matching mode entries
+ */
+void fb_delete_videomode(struct fb_videomode *mode, struct list_head *head)
+{
+ struct list_head *pos, *n;
+ struct fb_modelist *modelist;
+ struct fb_videomode *m;
+
+ list_for_each_safe(pos, n, head) {
+ modelist = list_entry(pos, struct fb_modelist, list);
+ m = &modelist->mode;
+ if (fb_mode_is_equal(m, mode)) {
+ list_del(pos);
+ kfree(pos);
+ }
+ }
+}
+
+/**
+ * fb_destroy_modelist: destroy modelist
+ * @head: struct list_head of modelist
+ */
+void fb_destroy_modelist(struct list_head *head)
+{
+ struct list_head *pos, *n;
+
+ list_for_each_safe(pos, n, head) {
+ list_del(pos);
+ kfree(pos);
+ }
+}
+
+/**
+ * fb_videomode_to_modelist: convert mode array to mode list
+ * @modedb: array of struct fb_videomode
+ * @num: number of entries in array
+ * @head: struct list_head of modelist
+ */
+void fb_videomode_to_modelist(struct fb_videomode *modedb, int num,
+ struct list_head *head)
+{
+ int i;
+
+ INIT_LIST_HEAD(head);
+
+ for (i = 0; i < num; i++) {
+ if (fb_add_videomode(&modedb[i], head))
+ return;
+ }
+}
+
+EXPORT_SYMBOL(fb_videomode_to_var);
+EXPORT_SYMBOL(fb_var_to_videomode);
+EXPORT_SYMBOL(fb_mode_is_equal);
+EXPORT_SYMBOL(fb_add_videomode);
+EXPORT_SYMBOL(fb_delete_videomode);
+EXPORT_SYMBOL(fb_destroy_modelist);
+EXPORT_SYMBOL(fb_match_mode);
+EXPORT_SYMBOL(fb_find_best_mode);
+EXPORT_SYMBOL(fb_videomode_to_modelist);
EXPORT_SYMBOL(fb_find_mode);
git://git.onelab.eu / linux-2.6.git / blobdiff