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Commit 978be6d7 authored by Wu Fengguang's avatar Wu Fengguang Committed by Takashi Iwai
Browse files

ALSA: intelhdmi - separate out infoframe checksum routine 



And make it right when called for more than one times.

Signed-off-by: default avatarWu Fengguang <fengguang.wu@intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 3f54aa50

sound/pci/hda/patch_intelhdmi.c

+17 −6
Original line number Diff line number Diff line
@@ -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]);

}



/*