gma500: Discard modes that don't fit in stolen memory

[karo-tx-linux.git] / drivers / gpu / drm / gma500 / oaktrail_hdmi.c

diff --git a/drivers/gpu/drm/gma500/oaktrail_hdmi.c b/drivers/gpu/drm/gma500/oaktrail_hdmi.c
index 36878a60080d8a59749dd838a2a4c762dd1046df..025d30970cc00e080b2140a5b2fe56540c57ee95 100644 (file)
--- a/drivers/gpu/drm/gma500/oaktrail_hdmi.c
+++ b/drivers/gpu/drm/gma500/oaktrail_hdmi.c
@@ -506,6 +506,7 @@ int oaktrail_crtc_hdmi_mode_set(struct drm_crtc *crtc,
 static int oaktrail_hdmi_mode_valid(struct drm_connector *connector,
                                struct drm_display_mode *mode)
 {
+       struct drm_psb_private *dev_priv = connector->dev->dev_private;
        if (mode->clock > 165000)
                return MODE_CLOCK_HIGH;
        if (mode->clock < 20000)
@@ -514,6 +515,11 @@ static int oaktrail_hdmi_mode_valid(struct drm_connector *connector,
        if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
                return MODE_NO_DBLESCAN;
 
+       /* We assume worst case scenario of 32 bpp here, since we don't know */
+       if ((ALIGN(mode->hdisplay * 4, 64) * mode->vdisplay) >
+           dev_priv->vram_stolen_size)
+               return MODE_MEM;
+
        return MODE_OK;
 }