From 978be6d711be237e0344eca21c3922ae88a240bc Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Wed, 18 Nov 2009 12:38:04 +0800 Subject: ALSA: intelhdmi - separate out infoframe checksum routine And make it right when called for more than one times. Signed-off-by: Wu Fengguang Signed-off-by: Takashi Iwai --- sound/pci/hda/patch_intelhdmi.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) (limited to 'sound/pci/hda/patch_intelhdmi.c') diff --git a/sound/pci/hda/patch_intelhdmi.c b/sound/pci/hda/patch_intelhdmi.c index c5fd011567f..d68dba9ac11 100644 --- a/sound/pci/hda/patch_intelhdmi.c +++ b/sound/pci/hda/patch_intelhdmi.c @@ -508,24 +508,35 @@ static void hdmi_clear_dip_buffers(struct hda_codec *codec, hda_nid_t pin_nid) #endif } +static void hdmi_checksum_audio_infoframe(struct hdmi_audio_infoframe *ai) +{ + u8 *bytes = (u8 *)ai; + u8 sum = 0; + int i; + + ai->checksum = 0; + + for (i = 0; i < sizeof(*ai); i++) + sum += bytes[i]; + + ai->checksum = - sum; +} + static void hdmi_fill_audio_infoframe(struct hda_codec *codec, hda_nid_t pin_nid, struct hdmi_audio_infoframe *ai) { - u8 *params = (u8 *)ai; - u8 sum = 0; + u8 *bytes = (u8 *)ai; int i; hdmi_debug_dip_size(codec, pin_nid); hdmi_clear_dip_buffers(codec, pin_nid); /* be paranoid */ - for (i = 0; i < sizeof(*ai); i++) - sum += params[i]; - ai->checksum = - sum; + hdmi_checksum_audio_infoframe(ai); 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]); + hdmi_write_dip_byte(codec, pin_nid, bytes[i]); } /* -- cgit v1.2.3