Merge tag 'drm-intel-next-2013-08-09' of git://people.freedesktop.org/~danvet/drm-intel into drm-next

Daniel writes:
New pile of stuff for -next:
- Cleanup of the old crtc helper callbacks, all encoders are now converted
  to the i915 modeset infrastructure.
- Massive amount of wm patches from Ville for ilk, snb, ivb, hsw, this is
  prep work to eventually get things going for nuclear pageflips where we
  need to adjust watermarks on the fly.
- More vm/vma patches from Ben. This refactoring isn't yet fully rolled
  out, we miss the execbuf conversion and some of the low-level
  bind/unbind support code.
- Convert our hdmi infoframe code to use the new common helper functions
  (Damien). This contains some bugfixes for the common infoframe helpers.
- Some cruft removal from Damien.
- Various smaller bits&pieces all over, as usual.

* tag 'drm-intel-next-2013-08-09' of git://people.freedesktop.org/~danvet/drm-intel: (105 commits)
  drm/i915: Fix FB WM for HSW
  drm/i915: expose HDMI connectors on port C on BYT
  drm/i915: fix a limit check in hsw_compute_wm_results()
  drm/i915: unbreak i915_gem_object_ggtt_unbind()
  drm/i915: Make intel_set_mode() static
  drm/i915: Remove intel_modeset_disable()
  drm/i915: Make intel_encoder_dpms() static
  drm/i915: Make i915_hangcheck_elapsed() static
  drm/i915: Fix #endif comment
  drm/i915: Remove i915_gem_object_check_coherency()
  drm/i915: Remove stale prototypes
  drm/i915: List objects allocated from stolen memory in debugfs
  drm/i915: Always call intel_update_sprite_watermarks() when disabling a plane
  drm/i915: Pass plane and crtc to intel_update_sprite_watermarks
  drm/i915: Don't try to disable plane if it's already disabled
  drm/i915: Pass crtc to our update/disable_plane hooks
  drm/i915: Split plane watermark parameters into a separate struct
  drm/i915: Pull some watermarks state into a separate structure
  drm/i915: Calculate max watermark levels for ILK+
  drm/i915: Rename hsw_lp_wm_result to intel_wm_level
  ...

drivers/video/hdmi.c

@@ -22,6 +22,7 @@
  */
 
 #include <linux/bitops.h>
+#include <linux/bug.h>
 #include <linux/errno.h>
 #include <linux/export.h>
 #include <linux/hdmi.h>
@@ -52,7 +53,7 @@ int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame)
 
 	frame->type = HDMI_INFOFRAME_TYPE_AVI;
 	frame->version = 2;
-	frame->length = 13;
+	frame->length = HDMI_AVI_INFOFRAME_SIZE;
 
 	return 0;
 }
@@ -83,7 +84,7 @@ ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer,
 	if (size < length)
 		return -ENOSPC;
 
-	memset(buffer, 0, length);
+	memset(buffer, 0, size);
 
 	ptr[0] = frame->type;
 	ptr[1] = frame->version;
@@ -151,7 +152,7 @@ int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame,
 
 	frame->type = HDMI_INFOFRAME_TYPE_SPD;
 	frame->version = 1;
-	frame->length = 25;
+	frame->length = HDMI_SPD_INFOFRAME_SIZE;
 
 	strncpy(frame->vendor, vendor, sizeof(frame->vendor));
 	strncpy(frame->product, product, sizeof(frame->product));
@@ -185,7 +186,7 @@ ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, void *buffer,
 	if (size < length)
 		return -ENOSPC;
 
-	memset(buffer, 0, length);
+	memset(buffer, 0, size);
 
 	ptr[0] = frame->type;
 	ptr[1] = frame->version;
@@ -218,7 +219,7 @@ int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame)
 
 	frame->type = HDMI_INFOFRAME_TYPE_AUDIO;
 	frame->version = 1;
-	frame->length = 10;
+	frame->length = HDMI_AUDIO_INFOFRAME_SIZE;
 
 	return 0;
 }
@@ -250,7 +251,7 @@ ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
 	if (size < length)
 		return -ENOSPC;
 
-	memset(buffer, 0, length);
+	memset(buffer, 0, size);
 
 	if (frame->channels >= 2)
 		channels = frame->channels - 1;
@@ -307,7 +308,7 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
 	if (size < length)
 		return -ENOSPC;
 
-	memset(buffer, 0, length);
+	memset(buffer, 0, size);
 
 	ptr[0] = frame->type;
 	ptr[1] = frame->version;
@@ -321,3 +322,45 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
 	return length;
 }
 EXPORT_SYMBOL(hdmi_vendor_infoframe_pack);
+
+/**
+ * hdmi_infoframe_pack() - write a HDMI infoframe to binary buffer
+ * @frame: HDMI infoframe
+ * @buffer: destination buffer
+ * @size: size of buffer
+ *
+ * Packs the information contained in the @frame structure into a binary
+ * representation that can be written into the corresponding controller
+ * registers. Also computes the checksum as required by section 5.3.5 of
+ * the HDMI 1.4 specification.
+ *
+ * Returns the number of bytes packed into the binary buffer or a negative
+ * error code on failure.
+ */
+ssize_t
+hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer, size_t size)
+{
+	ssize_t length;
+
+	switch (frame->any.type) {
+	case HDMI_INFOFRAME_TYPE_AVI:
+		length = hdmi_avi_infoframe_pack(&frame->avi, buffer, size);
+		break;
+	case HDMI_INFOFRAME_TYPE_SPD:
+		length = hdmi_spd_infoframe_pack(&frame->spd, buffer, size);
+		break;
+	case HDMI_INFOFRAME_TYPE_AUDIO:
+		length = hdmi_audio_infoframe_pack(&frame->audio, buffer, size);
+		break;
+	case HDMI_INFOFRAME_TYPE_VENDOR:
+		length = hdmi_vendor_infoframe_pack(&frame->vendor,
+						    buffer, size);
+		break;
+	default:
+		WARN(1, "Bad infoframe type %d\n", frame->any.type);
+		length = -EINVAL;
+	}
+
+	return length;
+}
+EXPORT_SYMBOL(hdmi_infoframe_pack);