Merge tag 'drm-intel-fixes-2015-08-20' of git://anongit.freedesktop.org/drm-intel into drm-fixes

Revert of a VBT parsing commit that should've been queued for drm-next,
not v4.2. The revert unbreaks Braswell among other things.

Also on Braswell removal of DP HBR2/TP3 and intermediate eDP frequency
support. The code was optimistically added based on incorrect
documentation; the platform does not support them. These are cc: stable.

Finally a gpu state fix from Chris, also cc: stable.

* tag 'drm-intel-fixes-2015-08-20' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Avoid TP3 on CHV
  drm/i915: remove HBR2 from chv supported list
  Revert "drm/i915: Add eDP intermediate frequencies for CHV"
  Revert "drm/i915: Allow parsing of variable size child device entries from VBT"
  drm/i915: Flag the execlists context object as dirty after every use

3 files changed, 28 insertions, 36 deletions

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 3dcd59e694db..198fc3c3291b 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -1075,34 +1075,15 @@ parse_device_mapping(struct drm_i915_private *dev_priv,
         const union child_device_config *p_child;
         union child_device_config *child_dev_ptr;
         int i, child_device_num, count;
-        u8 expected_size;
-        u16 block_size;
+        u16     block_size;
 
         p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
         if (!p_defs) {
                 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
                 return;
         }
-        if (bdb->version < 195) {
-                expected_size = 33;
-        } else if (bdb->version == 195) {
-                expected_size = 37;
-        } else if (bdb->version <= 197) {
-                expected_size = 38;
-        } else {
-                expected_size = 38;
-                DRM_DEBUG_DRIVER("Expected child_device_config size for BDB version %u not known; assuming %u\n",
-                                 expected_size, bdb->version);
-        }
-
-        if (expected_size > sizeof(*p_child)) {
-                DRM_ERROR("child_device_config cannot fit in p_child\n");
-                return;
-        }
-
-        if (p_defs->child_dev_size != expected_size) {
-                DRM_ERROR("Size mismatch; child_device_config size=%u (expected %u); bdb->version: %u\n",
-                          p_defs->child_dev_size, expected_size, bdb->version);
+        if (p_defs->child_dev_size < sizeof(*p_child)) {
+                DRM_ERROR("General definiton block child device size is too small.\n");
                 return;
         }
         /* get the block size of general definitions */
@@ -1149,7 +1130,7 @@ parse_device_mapping(struct drm_i915_private *dev_priv,
 
                 child_dev_ptr = dev_priv->vbt.child_dev + count;
                 count++;
-                memcpy(child_dev_ptr, p_child, p_defs->child_dev_size);
+                memcpy(child_dev_ptr, p_child, sizeof(*p_child));
         }
         return;
 }
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 6e8faa253792..1df0e1fe235f 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -93,9 +93,6 @@ static const struct dp_link_dpll chv_dpll[] = {
 
 static const int skl_rates[] = { 162000, 216000, 270000,
                                   324000, 432000, 540000 };
-static const int chv_rates[] = { 162000, 202500, 210000, 216000,
-                                 243000, 270000, 324000, 405000,
-                                 420000, 432000, 540000 };
 static const int default_rates[] = { 162000, 270000, 540000 };
 
 /**
@@ -1169,24 +1166,31 @@ intel_dp_sink_rates(struct intel_dp *intel_dp, const int **sink_rates)
         return (intel_dp_max_link_bw(intel_dp) >> 3) + 1;
 }
 
+static bool intel_dp_source_supports_hbr2(struct drm_device *dev)
+{
+        /* WaDisableHBR2:skl */
+        if (IS_SKYLAKE(dev) && INTEL_REVID(dev) <= SKL_REVID_B0)
+                return false;
+
+        if ((IS_HASWELL(dev) && !IS_HSW_ULX(dev)) || IS_BROADWELL(dev) ||
+            (INTEL_INFO(dev)->gen >= 9))
+                return true;
+        else
+                return false;
+}
+
 static int
 intel_dp_source_rates(struct drm_device *dev, const int **source_rates)
 {
         if (IS_SKYLAKE(dev)) {
                 *source_rates = skl_rates;
                 return ARRAY_SIZE(skl_rates);
-        } else if (IS_CHERRYVIEW(dev)) {
-                *source_rates = chv_rates;
-                return ARRAY_SIZE(chv_rates);
         }
 
         *source_rates = default_rates;
 
-        if (IS_SKYLAKE(dev) && INTEL_REVID(dev) <= SKL_REVID_B0)
-                /* WaDisableHBR2:skl */
-                return (DP_LINK_BW_2_7 >> 3) + 1;
-        else if (INTEL_INFO(dev)->gen >= 8 ||
-            (IS_HASWELL(dev) && !IS_HSW_ULX(dev)))
+        /* This depends on the fact that 5.4 is last value in the array */
+        if (intel_dp_source_supports_hbr2(dev))
                 return (DP_LINK_BW_5_4 >> 3) + 1;
         else
                 return (DP_LINK_BW_2_7 >> 3) + 1;
@@ -3941,10 +3945,15 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
                 }
         }
 
-        /* Training Pattern 3 support, both source and sink */
+        /* Training Pattern 3 support, Intel platforms that support HBR2 alone
+         * have support for TP3 hence that check is used along with dpcd check
+         * to ensure TP3 can be enabled.
+         * SKL < B0: due it's WaDisableHBR2 is the only exception where TP3 is
+         * supported but still not enabled.
+         */
         if (intel_dp->dpcd[DP_DPCD_REV] >= 0x12 &&
             intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_TPS3_SUPPORTED &&
-            (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8)) {
+            intel_dp_source_supports_hbr2(dev)) {
                 intel_dp->use_tps3 = true;
                 DRM_DEBUG_KMS("Displayport TPS3 supported\n");
         } else
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 9b74ffae5f5a..7f2161a1ff5d 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1012,6 +1012,8 @@ static int intel_lr_context_pin(struct intel_engine_cs *ring,
                 ret = intel_pin_and_map_ringbuffer_obj(ring->dev, ringbuf);
                 if (ret)
                         goto unpin_ctx_obj;
+
+                ctx_obj->dirty = true;
         }
 
         return ret;