fbdev: sh-mobile: retrieve and propagate display sizes from EDID

Monitor EDID contains information about physical display sizes. Retrieve
it and propagate to the framebuffer driver.

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_hdmi.c b/drivers/video/sh_mobile_hdmi.c
index d7df103..fcda0e9 100644 (file)
--- a/drivers/video/sh_mobile_hdmi.c
+++ b/drivers/video/sh_mobile_hdmi.c
@@ -787,6 +787,9 @@ static int sh_hdmi_read_edid(struct sh_hdmi *hdmi)
                found_rate_error = rate_error;
        }
 
+       hdmi->var.width = hdmi->monspec.max_x * 10;
+       hdmi->var.height = hdmi->monspec.max_y * 10;
+
        /*
         * TODO 1: if no ->info is present, postpone running the config until
         * after ->info first gets registered.
@@ -960,8 +963,12 @@ static bool sh_hdmi_must_reconfigure(struct sh_hdmi *hdmi)
        dev_dbg(info->dev, "Old %ux%u, new %ux%u\n",
                mode1.xres, mode1.yres, mode2.xres, mode2.yres);
 
-       if (fb_mode_is_equal(&mode1, &mode2))
+       if (fb_mode_is_equal(&mode1, &mode2)) {
+               /* It can be a different monitor with an equal video-mode */
+               old_var->width = new_var->width;
+               old_var->height = new_var->height;
                return false;
+       }
 
        dev_dbg(info->dev, "Switching %u -> %u lines\n",
                mode1.yres, mode2.yres);
@@ -1057,8 +1064,11 @@ static void sh_hdmi_edid_work_fn(struct work_struct *work)
                         * on, if we run a resume here, the logo disappears
                         */
                        if (lock_fb_info(hdmi->info)) {
-                               sh_hdmi_display_on(hdmi, hdmi->info);
-                               unlock_fb_info(hdmi->info);
+                               struct fb_info *info = hdmi->info;
+                               info->var.width = hdmi->var.width;
+                               info->var.height = hdmi->var.height;
+                               sh_hdmi_display_on(hdmi, info);
+                               unlock_fb_info(info);
                        }
                } else {
                        /* New monitor or have to wake up */