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authorDave Airlie <airlied@redhat.com>2013-08-21 12:48:59 +1000
committerDave Airlie <airlied@redhat.com>2013-08-21 12:48:59 +1000
commit9712def2b3e10081b5f7d3c3bddad3126df4f0ba (patch)
tree1db7d9b608322fcf1089caac0709d49aed5a45ee /drivers/video
parent66cc8b6b8b2b3b5c9a67429af04ec356ff7fcfa4 (diff)
parent5c536613d8ebda3da0448550d0a997651a6048e2 (diff)
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 ...
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/hdmi.c57
1 files changed, 50 insertions, 7 deletions
diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
index 40178338b61..635d5690dd5 100644
--- a/drivers/video/hdmi.c
+++ b/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);