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authorWu Fengguang <fengguang.wu@intel.com>2009-02-11 15:22:30 +0800
committerTakashi Iwai <tiwai@suse.de>2009-02-11 09:09:07 +0100
commit9a957a24e3b4008d84e204cdf25849ae4d5592a2 (patch)
tree58f5794b82700e035f1362b6337eb8090b9b723c
parent606c0cee695bbd0c2bf32132999e35cff5a6dd9e (diff)
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ALSA: hda - compute checksum in HDMI audio infoframe
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/pci/hda/patch_intelhdmi.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c
index f2610d6..90b1137 100644
--- a/sound/pci/hda/patch_intelhdmi.c
+++ b/sound/pci/hda/patch_intelhdmi.c
@@ -366,11 +366,16 @@ static void hdmi_fill_audio_infoframe(struct hda_codec *codec,
struct hdmi_audio_infoframe *ai)
{
u8 *params = (u8 *)ai;
+ u8 sum = 0;
int i;
hdmi_debug_dip_size(codec);
hdmi_clear_dip_buffers(codec); /* be paranoid */
+ for (i = 0; i < sizeof(ai); i++)
+ sum += params[i];
+ ai->checksum = - sum;
+
hdmi_set_dip_index(codec, PIN_NID, 0x0, 0x0);
for (i = 0; i < sizeof(ai); i++)
hdmi_write_dip_byte(codec, PIN_NID, params[i]);