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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-02-11 15:22:30 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-02-11 09:09:07 +0100 |
| commit | 9a957a24e3b4008d84e204cdf25849ae4d5592a2 (patch) | |
| tree | 58f5794b82700e035f1362b6337eb8090b9b723c /sound | |
| parent | 606c0cee695bbd0c2bf32132999e35cff5a6dd9e (diff) | |
| download | lwn-9a957a24e3b4008d84e204cdf25849ae4d5592a2.tar.gz lwn-9a957a24e3b4008d84e204cdf25849ae4d5592a2.zip | |
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>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/patch_intelhdmi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c index f2610d67e187..90b11374a0a8 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]); |