drm/i915: Handle cdclk limits on broadwell.

As the comment indicates this can only fail gracefully when called from compute_config. Fortunately this is now what's happening, so the fixme can be removed and the DRM_ERROR downgraded. Link: http://patchwork.freedesktop.org/patch/msgid/1448360945-5723-3-git-send-email-maarten.lankhorst@linux.intel.com Signed-off-by: Maarten Lankhorst <[email protected]> Reviewed-by: Chris Wilson <[email protected]>
zubinmehta · Dec 3, 2015 · 63ba534 · 63ba534
1 parent 3c28ff2
commit 63ba534
Showing 1 changed file with 3 additions and 7 deletions.
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
@@ -9719,14 +9719,10 @@ static int broadwell_modeset_calc_cdclk(struct drm_atomic_state *state)
 	else
 		cdclk = 337500;
 
-	/*
-	 * FIXME move the cdclk caclulation to
-	 * compute_config() so we can fail gracegully.
-	 */
 	if (cdclk > dev_priv->max_cdclk_freq) {
-		DRM_ERROR("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
-			  cdclk, dev_priv->max_cdclk_freq);
-		cdclk = dev_priv->max_cdclk_freq;
+		DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
+			      cdclk, dev_priv->max_cdclk_freq);
+		return -EINVAL;
 	}
 
 	to_intel_atomic_state(state)->cdclk = cdclk;