fbdev: sh_mobile_hdmi: support hot-plugging of different HDMI / DVI displays
With this patch hot-plugging of an HDMI or a DVI monitor can select a different
video mode and reconfigure the LCDC and HDMI controllers accordingly. Due to a
lack of a standard API to inform framebuffer users of a changed video mode, the
framebuffer configuration is preserved regardless of a specific mode, selected
for the monitor. As described in a previous patch, this leads to smaller
framebuffers being displayed on larger monitors or a part of a larger
framebuffer being displayed on a smaller resolution monitor.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c
index 946a810..b4a8786 100644
--- a/drivers/video/sh_mobile_lcdcfb.c
+++ b/drivers/video/sh_mobile_lcdcfb.c
@@ -944,6 +944,7 @@
struct sh_mobile_lcdc_chan *ch = info->par;
struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
struct fb_var_screeninfo *var;
+ int ret;
if (&ch->lcdc->notifier != nb)
return NOTIFY_DONE;
@@ -958,6 +959,7 @@
module_put(board_cfg->owner);
}
pm_runtime_put(info->device);
+ sh_mobile_lcdc_stop(ch->lcdc);
break;
case FB_EVENT_RESUME:
var = &info->var;
@@ -968,31 +970,9 @@
module_put(board_cfg->owner);
}
- /* Check if the new display is not in our modelist */
- if (ch->info->modelist.next &&
- !fb_match_mode(var, &ch->info->modelist)) {
- struct fb_videomode mode;
- int ret;
-
- /* Can we handle this display? */
- if (var->xres > ch->cfg.lcd_cfg[0].xres ||
- var->yres > ch->cfg.lcd_cfg[0].yres)
- /*
- * LCDC resume failed, no need to continue with
- * the notifier chain
- */
- return notifier_from_errno(-ENOMEM);
-
- /* Add to the modelist */
- fb_var_to_videomode(&mode, var);
- ret = fb_add_videomode(&mode, &ch->info->modelist);
- if (ret < 0)
- return notifier_from_errno(ret);
- }
-
- pm_runtime_get_sync(info->device);
-
- sh_mobile_lcdc_geometry(ch);
+ ret = sh_mobile_lcdc_start(ch->lcdc);
+ if (!ret)
+ pm_runtime_get_sync(info->device);
}
return NOTIFY_OK;
@@ -1181,6 +1161,7 @@
}
}
+ fb_videomode_to_modelist(ch->cfg.lcd_cfg, ch->cfg.num_cfg, &info->modelist);
error = register_framebuffer(info);
if (error < 0)
goto err1;