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ALSA: hda - compute checksum in HDMI audio infoframe

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Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Wu Fengguang 2009-02-11 15:22:30 +08:00 committed by Takashi Iwai
parent 606c0cee69
commit 9a957a24e3
1 changed files with 5 additions and 0 deletions
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5
sound/pci/hda/patch_intelhdmi.c
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@ -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]);