commit 6e91394b57b3272046f8859b7008dfe32ba5f0d4
Author: Pantelis Antoniou <panto@antoniou-consulting.com>
Date:   Fri Mar 8 16:39:10 2013 +0200

    tilcdc: Enable reduced blanking check only on DVI/slave

    There's no reason to enable the check for non EDID probe cases.
    Make sure it does not activate on fixed panel timings.

    Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index 628d9aa..4d94daa 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -241,7 +241,7 @@ static int tilcdc_crtc_mode_set(struct drm_crtc *crtc,
    uint32_t reg, hbp, hfp, hsw, vbp, vfp, vsw;
    int ret;

-   ret = tilcdc_crtc_mode_valid(crtc, mode);
+   ret = tilcdc_crtc_mode_valid(crtc, mode, 0);
    if (WARN_ON(ret))
        return ret;

@@ -418,7 +418,8 @@ int tilcdc_crtc_max_width(struct drm_crtc *crtc)
    return max_width;
 }

-int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode)
+int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode,
+       int rb_check)
 {
    struct tilcdc_drm_private *priv = crtc->dev->dev_private;
    unsigned int bandwidth;
@@ -439,7 +440,7 @@ int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode)
    if (bandwidth > priv->max_bandwidth)
        return MODE_BAD;

-   if (priv->allow_non_rblank == 0) {
+   if (rb_check) {
        /* we only support reduced blanking modes */
        rb = (mode->htotal - mode->hdisplay == 160) &&
               (mode->hsync_end - mode->hdisplay == 80) &&
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.h b/drivers/gpu/drm/tilcdc/tilcdc_drv.h
index c858f73..b04f94c 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.h
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.h
@@ -145,7 +145,8 @@ irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc);
 void tilcdc_crtc_update_clk(struct drm_crtc *crtc);
 void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
        const struct tilcdc_panel_info *info);
-int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode);
+int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode,
+       int rb_check);
 int tilcdc_crtc_max_width(struct drm_crtc *crtc);

 #endif /* __TILCDC_DRV_H__ */
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.c b/drivers/gpu/drm/tilcdc/tilcdc_panel.c
index f4b794d..2496ee4 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_panel.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.c
@@ -197,7 +197,7 @@ static int panel_connector_mode_valid(struct drm_connector *connector,
 {
    struct tilcdc_drm_private *priv = connector->dev->dev_private;
    /* our only constraints are what the crtc can generate: */
-   return tilcdc_crtc_mode_valid(priv->crtc, mode);
+   return tilcdc_crtc_mode_valid(priv->crtc, mode, 0);
 }

 static struct drm_encoder *panel_connector_best_encoder(
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_slave.c b/drivers/gpu/drm/tilcdc/tilcdc_slave.c
index 7d05c3d..a2d86ac 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_slave.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_slave.c
@@ -167,7 +167,8 @@ static int slave_connector_mode_valid(struct drm_connector *connector,
    struct tilcdc_drm_private *priv = connector->dev->dev_private;
    int ret;

-   ret = tilcdc_crtc_mode_valid(priv->crtc, mode);
+   ret = tilcdc_crtc_mode_valid(priv->crtc, mode,
+           priv->allow_non_rblank ? 0 : 1);
    if (ret != MODE_OK)
        return ret;

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
index 7065dfa..6f9d727 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
@@ -213,7 +213,8 @@ static int tfp410_connector_mode_valid(struct drm_connector *connector,
 {
    struct tilcdc_drm_private *priv = connector->dev->dev_private;
    /* our only constraints are what the crtc can generate: */
-   return tilcdc_crtc_mode_valid(priv->crtc, mode);
+   return tilcdc_crtc_mode_valid(priv->crtc, mode,
+           priv->allow_non_rblank ? 0 : 1);
 }

 static struct drm_encoder *tfp410_connector_best_encoder(