Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danve…

…t/drm-intel into drm-fixes

Daniel wrote:

2 little patches:
- One regression fix to disable sdvo hotplug on broken hw.
- One patch to upconvert the snb hang workaround from patch v1 to patch
 v2.

* 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel:
  drm/i915: Do no set Stencil Cache eviction LRA w/a on gen7+
  drm/i915: disable sdvo hotplug on i945g/gm

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -398,10 +398,8 @@ static int init_render_ring(struct intel_ring_buffer *ring)
 			return ret;
 	}
 
-	if (INTEL_INFO(dev)->gen >= 6) {
-		I915_WRITE(INSTPM,
-			   INSTPM_FORCE_ORDERING << 16 | INSTPM_FORCE_ORDERING);
 
+	if (IS_GEN6(dev)) {
 		/* From the Sandybridge PRM, volume 1 part 3, page 24:
 		 * "If this bit is set, STCunit will have LRA as replacement
 		 *  policy. [...] This bit must be reset.  LRA replacement
@@ -411,6 +409,11 @@ static int init_render_ring(struct intel_ring_buffer *ring)
 			   CM0_STC_EVICT_DISABLE_LRA_SNB << CM0_MASK_SHIFT);
 	}
 
+	if (INTEL_INFO(dev)->gen >= 6) {
+		I915_WRITE(INSTPM,
+			   INSTPM_FORCE_ORDERING << 16 | INSTPM_FORCE_ORDERING);
+	}
+
 	return ret;
 }
 

drivers/gpu/drm/i915/intel_sdvo.c

@@ -1220,8 +1220,14 @@ static bool intel_sdvo_get_capabilities(struct intel_sdvo *intel_sdvo, struct in
 
 static int intel_sdvo_supports_hotplug(struct intel_sdvo *intel_sdvo)
 {
+	struct drm_device *dev = intel_sdvo->base.base.dev;
 	u8 response[2];
 
+	/* HW Erratum: SDVO Hotplug is broken on all i945G chips, there's noise
+	 * on the line. */
+	if (IS_I945G(dev) || IS_I945GM(dev))
+		return false;
+
 	return intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_HOT_PLUG_SUPPORT,
 				    &response, 2) && response[0];
 }