5 files changed, 32 insertions, 7 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index df9253d890ee..cdfb9da0e4ce 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4800,10 +4800,10 @@ i915_gem_inactive_count(struct shrinker *shrinker, struct shrink_control *sc)
 
         if (!mutex_trylock(&dev->struct_mutex)) {
                 if (!mutex_is_locked_by(&dev->struct_mutex, current))
-                        return SHRINK_STOP;
+                        return 0;
 
                 if (dev_priv->mm.shrinker_no_lock_stealing)
-                        return SHRINK_STOP;
+                        return 0;
 
                 unlock = false;
         }
@@ -4901,10 +4901,10 @@ i915_gem_inactive_scan(struct shrinker *shrinker, struct shrink_control *sc)
 
         if (!mutex_trylock(&dev->struct_mutex)) {
                 if (!mutex_is_locked_by(&dev->struct_mutex, current))
-                        return 0;
+                        return SHRINK_STOP;
 
                 if (dev_priv->mm.shrinker_no_lock_stealing)
-                        return 0;
+                        return SHRINK_STOP;
 
                 unlock = false;
         }
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index aba9d7498996..dae364f0028c 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -143,8 +143,10 @@ static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
 
         /* Seek the first printf which is hits start position */
         if (e->pos < e->start) {
-                len = vsnprintf(NULL, 0, f, args);
-                if (!__i915_error_seek(e, len))
+                va_list tmp;
+
+                va_copy(tmp, args);
+                if (!__i915_error_seek(e, vsnprintf(NULL, 0, f, tmp)))
                         return;
         }
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d8a1d98693e7..e5822e79f912 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4775,6 +4775,10 @@ static void i9xx_set_pipeconf(struct intel_crtc *intel_crtc)
 
         pipeconf = 0;
 
+        if (dev_priv->quirks & QUIRK_PIPEA_FORCE &&
+            I915_READ(PIPECONF(intel_crtc->pipe)) & PIPECONF_ENABLE)
+                pipeconf |= PIPECONF_ENABLE;
+
         if (intel_crtc->pipe == 0 && INTEL_INFO(dev)->gen < 4) {
                 /* Enable pixel doubling when the dot clock is > 90% of the (display)
                  * core speed.
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 2151d13772b8..79c14e298ba6 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -588,7 +588,18 @@ intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
                         DRM_DEBUG_KMS("aux_ch native nack\n");
                         return -EREMOTEIO;
                 case AUX_NATIVE_REPLY_DEFER:
-                        udelay(100);
+                        /*
+                         * For now, just give more slack to branch devices. We
+                         * could check the DPCD for I2C bit rate capabilities,
+                         * and if available, adjust the interval. We could also
+                         * be more careful with DP-to-Legacy adapters where a
+                         * long legacy cable may force very low I2C bit rates.
+                         */
+                        if (intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
+                            DP_DWN_STRM_PORT_PRESENT)
+                                usleep_range(500, 600);
+                        else
+                                usleep_range(300, 400);
                         continue;
                 default:
                         DRM_ERROR("aux_ch invalid native reply 0x%02x\n",
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
index f2c6d7909ae2..dd6f84bf6c22 100644
--- a/drivers/gpu/drm/i915/intel_tv.c
+++ b/drivers/gpu/drm/i915/intel_tv.c
@@ -916,6 +916,14 @@ intel_tv_compute_config(struct intel_encoder *encoder,
         DRM_DEBUG_KMS("forcing bpc to 8 for TV\n");
         pipe_config->pipe_bpp = 8*3;
 
+        /* TV has it's own notion of sync and other mode flags, so clear them. */
+        pipe_config->adjusted_mode.flags = 0;
+
+        /*
+         * FIXME: We don't check whether the input mode is actually what we want
+         * or whether userspace is doing something stupid.
+         */
+
         return true;
 }