diff options
| -rw-r--r-- | drivers/video/console/fbcon.c | 42 | ||||
| -rw-r--r-- | drivers/video/fbmem.c | 33 | ||||
| -rw-r--r-- | include/linux/fb.h | 12 |
3 files changed, 87 insertions, 0 deletions
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index 6fc3501581d6..34899bd7c9f3 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -3043,6 +3043,43 @@ static void fbcon_new_modelist(struct fb_info *info) } } +static void fbcon_get_requirement(struct fb_info *info, + struct fb_blit_caps *caps) +{ + struct vc_data *vc; + struct display *p; + int charcnt; + + if (caps->flags) { + int i; + + for (i = first_fb_vc; i <= last_fb_vc; i++) { + vc = vc_cons[i].d; + if (vc && vc->vc_mode == KD_TEXT) { + p = &fb_display[i]; + caps->x |= 1 << (vc->vc_font.width - 1); + caps->y |= 1 << (vc->vc_font.height - 1); + charcnt = (p->userfont) ? + FNTCHARCNT(p->fontdata) : 256; + if (caps->len < charcnt) + caps->len = charcnt; + } + } + } else { + vc = vc_cons[fg_console].d; + + if (vc && vc->vc_mode == KD_TEXT) { + p = &fb_display[fg_console]; + caps->x |= 1 << (vc->vc_font.width - 1); + caps->y |= 1 << (vc->vc_font.height - 1); + charcnt = (p->userfont) ? + FNTCHARCNT(p->fontdata) : 256; + if (caps->len < charcnt) + caps->len = charcnt; + } + } +} + static int fbcon_event_notify(struct notifier_block *self, unsigned long action, void *data) { @@ -3050,6 +3087,7 @@ static int fbcon_event_notify(struct notifier_block *self, struct fb_info *info = event->info; struct fb_videomode *mode; struct fb_con2fbmap *con2fb; + struct fb_blit_caps *caps; int ret = 0; /* @@ -3098,6 +3136,10 @@ static int fbcon_event_notify(struct notifier_block *self, case FB_EVENT_NEW_MODELIST: fbcon_new_modelist(info); break; + case FB_EVENT_GET_REQ: + caps = event->data; + fbcon_get_requirement(info, caps); + break; } done: diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index cd1407921af5..354711c84aaa 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -773,6 +773,29 @@ fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) return 0; } +static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, + u32 activate) +{ + struct fb_event event; + struct fb_blit_caps caps, fbcaps; + int err = 0; + + memset(&caps, 0, sizeof(caps)); + memset(&fbcaps, 0, sizeof(fbcaps)); + caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; + event.info = info; + event.data = ∩︀ + fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); + info->fbops->fb_get_caps(info, &fbcaps, var); + + if (((fbcaps.x ^ caps.x) & caps.x) || + ((fbcaps.y ^ caps.y) & caps.y) || + (fbcaps.len < caps.len)) + err = -EINVAL; + + return err; +} + int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) { @@ -817,7 +840,15 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) struct fb_videomode mode; int err = 0; + if (info->fbops->fb_get_caps) { + err = fb_check_caps(info, var, activate); + + if (err) + goto done; + } + info->var = *var; + if (info->fbops->fb_set_par) info->fbops->fb_set_par(info); @@ -843,6 +874,8 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) } } } + + done: return 0; } diff --git a/include/linux/fb.h b/include/linux/fb.h index a2f382c01cd2..dff7a728948c 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -527,12 +527,20 @@ struct fb_cursor_user { #define FB_EVENT_MODE_CHANGE_ALL 0x0B /* A software display blank change occured */ #define FB_EVENT_CONBLANK 0x0C +/* Get drawing requirements */ +#define FB_EVENT_GET_REQ 0x0D struct fb_event { struct fb_info *info; void *data; }; +struct fb_blit_caps { + u32 x; + u32 y; + u32 len; + u32 flags; +}; extern int fb_register_client(struct notifier_block *nb); extern int fb_unregister_client(struct notifier_block *nb); @@ -652,6 +660,10 @@ struct fb_ops { /* restore saved state */ void (*fb_restore_state)(struct fb_info *info); + + /* get capability given var */ + void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps, + struct fb_var_screeninfo *var); }; #ifdef CONFIG_FB_TILEBLITTING |