[alsa-devel] [PATCH v3 3/5] ALSA: hda - hdmi: Refactor hdmi_eld into parsed_hdmi_eld

Takashi Iwai tiwai at suse.de
Tue Feb 19 12:48:16 CET 2013


At Tue, 19 Feb 2013 12:43:46 +0100,
David Henningsson wrote:
> 
> On 02/19/2013 12:07 PM, Takashi Iwai wrote:
> > At Tue, 19 Feb 2013 11:51:12 +0100,
> > David Henningsson wrote:
> >>
> >> For better readability, the information that is parsed out of the
> >> ELD data is now put into a separate parsed_hdmi_eld struct.
> >>
> >> Signed-off-by: David Henningsson <david.henningsson at canonical.com>
> >
> > You seem to have forgotten to change memset() call in
> > hdmi_present_sense().
> 
> Ok, will fix.
> 
> > One thing I feel a bit uneasy is that the whole struct hdmi_eld is
> > passed in the next patch as spec->temp_eld.  It contains uninitialized
> > proc entry and mutex.
> >
> > If we split the data and the control objects, can we pass only the
> > data struct to snd_hdmi_get_eld() instead of passing the whole struct
> > hdmi_eld?  If so, the question is where should fields like
> > monitor_present, etc, belong to.
> 
> What do you think of the attached version of patch 3/5? If you like it 
> I'll continue with fixing up 4/5 and 5/5 to match.

This looks better.  Thanks!


Takashi

> 
> >
> >
> > thanks,
> >
> > Takashi
> >
> >> ---
> >>   sound/pci/hda/hda_eld.c    |   41 ++++++++++++++++++++++-------------------
> >>   sound/pci/hda/hda_local.h  |   22 +++++++++++++---------
> >>   sound/pci/hda/patch_hdmi.c |   12 ++++++------
> >>   3 files changed, 41 insertions(+), 34 deletions(-)
> >>
> >> diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c
> >> index 4c054f4..aecda72 100644
> >> --- a/sound/pci/hda/hda_eld.c
> >> +++ b/sound/pci/hda/hda_eld.c
> >> @@ -246,8 +246,8 @@ static void hdmi_update_short_audio_desc(struct cea_sad *a,
> >>   /*
> >>    * Be careful, ELD buf could be totally rubbish!
> >>    */
> >> -static int hdmi_update_eld(struct hdmi_eld *e,
> >> -			   const unsigned char *buf, int size)
> >> +static int hdmi_parse_eld(struct parsed_hdmi_eld *e,
> >> +			  const unsigned char *buf, int size)
> >>   {
> >>   	int mnl;
> >>   	int i;
> >> @@ -260,7 +260,6 @@ static int hdmi_update_eld(struct hdmi_eld *e,
> >>   		goto out_fail;
> >>   	}
> >>
> >> -	e->eld_size = size;
> >>   	e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
> >>   	mnl		= GRAB_BITS(buf, 4, 0, 5);
> >>   	e->cea_edid_ver	= GRAB_BITS(buf, 4, 5, 3);
> >> @@ -305,7 +304,6 @@ static int hdmi_update_eld(struct hdmi_eld *e,
> >>   	if (!e->spk_alloc)
> >>   		e->spk_alloc = 0xffff;
> >>
> >> -	e->eld_valid = true;
> >>   	return 0;
> >>
> >>   out_fail:
> >> @@ -328,7 +326,7 @@ int snd_hdmi_get_eld(struct hdmi_eld *eld,
> >>
> >>   	/*
> >>   	 * ELD size is initialized to zero in caller function. If no errors and
> >> -	 * ELD is valid, actual eld_size is assigned in hdmi_update_eld()
> >> +	 * ELD is valid, actual eld_size is assigned.
> >>   	 */
> >>
> >>   	size = snd_hdmi_get_eld_size(codec, nid);
> >> @@ -372,8 +370,11 @@ int snd_hdmi_get_eld(struct hdmi_eld *eld,
> >>   		buf[i] = val;
> >>   	}
> >>
> >> -	ret = hdmi_update_eld(eld, buf, size);
> >> +	if ((ret = hdmi_parse_eld(&eld->info, buf, size)) < 0)
> >> +		goto error;
> >>
> >> +	eld->eld_size = size;
> >> +	eld->eld_valid = true;
> >>   error:
> >>   	return ret;
> >>   }
> >> @@ -438,7 +439,7 @@ void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
> >>   	buf[j] = '\0';	/* necessary when j == 0 */
> >>   }
> >>
> >> -void snd_hdmi_show_eld(struct hdmi_eld *e)
> >> +void snd_hdmi_show_eld(struct parsed_hdmi_eld *e)
> >>   {
> >>   	int i;
> >>
> >> @@ -487,10 +488,11 @@ static void hdmi_print_sad_info(int i, struct cea_sad *a,
> >>   static void hdmi_print_eld_info(struct snd_info_entry *entry,
> >>   				struct snd_info_buffer *buffer)
> >>   {
> >> -	struct hdmi_eld *e = entry->private_data;
> >> +	struct hdmi_eld *eld = entry->private_data;
> >> +	struct parsed_hdmi_eld *e = &eld->info;
> >>   	char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
> >>   	int i;
> >> -	static char *eld_versoin_names[32] = {
> >> +	static char *eld_version_names[32] = {
> >>   		"reserved",
> >>   		"reserved",
> >>   		"CEA-861D or below",
> >> @@ -505,15 +507,15 @@ static void hdmi_print_eld_info(struct snd_info_entry *entry,
> >>   		[4 ... 7] = "reserved"
> >>   	};
> >>
> >> -	snd_iprintf(buffer, "monitor_present\t\t%d\n", e->monitor_present);
> >> -	snd_iprintf(buffer, "eld_valid\t\t%d\n", e->eld_valid);
> >> -	if (!e->eld_valid)
> >> +	snd_iprintf(buffer, "monitor_present\t\t%d\n", eld->monitor_present);
> >> +	snd_iprintf(buffer, "eld_valid\t\t%d\n", eld->eld_valid);
> >> +	if (!eld->eld_valid)
> >>   		return;
> >>   	snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
> >>   	snd_iprintf(buffer, "connection_type\t\t%s\n",
> >>   				eld_connection_type_names[e->conn_type]);
> >>   	snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
> >> -					eld_versoin_names[e->eld_ver]);
> >> +					eld_version_names[e->eld_ver]);
> >>   	snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
> >>   				cea_edid_version_names[e->cea_edid_ver]);
> >>   	snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
> >> @@ -535,7 +537,8 @@ static void hdmi_print_eld_info(struct snd_info_entry *entry,
> >>   static void hdmi_write_eld_info(struct snd_info_entry *entry,
> >>   				struct snd_info_buffer *buffer)
> >>   {
> >> -	struct hdmi_eld *e = entry->private_data;
> >> +	struct hdmi_eld *eld = entry->private_data;
> >> +	struct parsed_hdmi_eld *e = &eld->info;
> >>   	char line[64];
> >>   	char name[64];
> >>   	char *sname;
> >> @@ -551,9 +554,9 @@ static void hdmi_write_eld_info(struct snd_info_entry *entry,
> >>   		 * 	eld_version edid_version
> >>   		 */
> >>   		if (!strcmp(name, "monitor_present"))
> >> -			e->monitor_present = val;
> >> +			eld->monitor_present = val;
> >>   		else if (!strcmp(name, "eld_valid"))
> >> -			e->eld_valid = val;
> >> +			eld->eld_valid = val;
> >>   		else if (!strcmp(name, "connection_type"))
> >>   			e->conn_type = val;
> >>   		else if (!strcmp(name, "port_id"))
> >> @@ -627,7 +630,7 @@ void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld)
> >>   #endif /* CONFIG_PROC_FS */
> >>
> >>   /* update PCM info based on ELD */
> >> -void snd_hdmi_eld_update_pcm_info(struct hdmi_eld *eld,
> >> +void snd_hdmi_eld_update_pcm_info(struct parsed_hdmi_eld *e,
> >>   			      struct hda_pcm_stream *hinfo)
> >>   {
> >>   	u32 rates;
> >> @@ -644,8 +647,8 @@ void snd_hdmi_eld_update_pcm_info(struct hdmi_eld *eld,
> >>   	formats = SNDRV_PCM_FMTBIT_S16_LE;
> >>   	maxbps = 16;
> >>   	channels_max = 2;
> >> -	for (i = 0; i < eld->sad_count; i++) {
> >> -		struct cea_sad *a = &eld->sad[i];
> >> +	for (i = 0; i < e->sad_count; i++) {
> >> +		struct cea_sad *a = &e->sad[i];
> >>   		rates |= a->rates;
> >>   		if (a->channels > channels_max)
> >>   			channels_max = a->channels;
> >> diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
> >> index 05f1d59..11fd5f5 100644
> >> --- a/sound/pci/hda/hda_local.h
> >> +++ b/sound/pci/hda/hda_local.h
> >> @@ -713,10 +713,10 @@ struct cea_sad {
> >>   /*
> >>    * ELD: EDID Like Data
> >>    */
> >> -struct hdmi_eld {
> >> -	bool	monitor_present;
> >> -	bool	eld_valid;
> >> -	int	eld_size;
> >> +struct parsed_hdmi_eld {
> >> +	/*
> >> +	 * all fields will be cleared before updating ELD
> >> +	 */
> >>   	int	baseline_len;
> >>   	int	eld_ver;
> >>   	int	cea_edid_ver;
> >> @@ -731,10 +731,14 @@ struct hdmi_eld {
> >>   	int	spk_alloc;
> >>   	int	sad_count;
> >>   	struct cea_sad sad[ELD_MAX_SAD];
> >> -	/*
> >> -	 * all fields above eld_buffer will be cleared before updating ELD
> >> -	 */
> >> +};
> >> +
> >> +struct hdmi_eld {
> >> +	bool	monitor_present;
> >> +	bool	eld_valid;
> >> +	int	eld_size;
> >>   	char    eld_buffer[ELD_MAX_SIZE];
> >> +	struct parsed_hdmi_eld info;
> >>   #ifdef CONFIG_PROC_FS
> >>   	struct snd_info_entry *proc_entry;
> >>   #endif
> >> @@ -742,8 +746,8 @@ struct hdmi_eld {
> >>
> >>   int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid);
> >>   int snd_hdmi_get_eld(struct hdmi_eld *, struct hda_codec *, hda_nid_t);
> >> -void snd_hdmi_show_eld(struct hdmi_eld *eld);
> >> -void snd_hdmi_eld_update_pcm_info(struct hdmi_eld *eld,
> >> +void snd_hdmi_show_eld(struct parsed_hdmi_eld *e);
> >> +void snd_hdmi_eld_update_pcm_info(struct parsed_hdmi_eld *e,
> >>   			      struct hda_pcm_stream *hinfo);
> >>
> >>   #ifdef CONFIG_PROC_FS
> >> diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
> >> index 7a73dfb..2ac6635 100644
> >> --- a/sound/pci/hda/patch_hdmi.c
> >> +++ b/sound/pci/hda/patch_hdmi.c
> >> @@ -529,7 +529,7 @@ static int hdmi_channel_allocation(struct hdmi_eld *eld, int channels)
> >>   	 * expand ELD's notions to match the ones used by Audio InfoFrame.
> >>   	 */
> >>   	for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
> >> -		if (eld->spk_alloc & (1 << i))
> >> +		if (eld->info.spk_alloc & (1 << i))
> >>   			spk_mask |= eld_speaker_allocation_bits[i];
> >>   	}
> >>
> >> @@ -543,7 +543,7 @@ static int hdmi_channel_allocation(struct hdmi_eld *eld, int channels)
> >>   		}
> >>   	}
> >>
> >> -	snd_print_channel_allocation(eld->spk_alloc, buf, sizeof(buf));
> >> +	snd_print_channel_allocation(eld->info.spk_alloc, buf, sizeof(buf));
> >>   	snd_printdd("HDMI: select CA 0x%x for %d-channel allocation: %s\n",
> >>   		    ca, channels, buf);
> >>
> >> @@ -884,7 +884,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
> >>   		ca = 0;
> >>
> >>   	memset(&ai, 0, sizeof(ai));
> >> -	if (eld->conn_type == 0) { /* HDMI */
> >> +	if (eld->info.conn_type == 0) { /* HDMI */
> >>   		struct hdmi_audio_infoframe *hdmi_ai = &ai.hdmi;
> >>
> >>   		hdmi_ai->type		= 0x84;
> >> @@ -893,7 +893,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
> >>   		hdmi_ai->CC02_CT47	= channels - 1;
> >>   		hdmi_ai->CA		= ca;
> >>   		hdmi_checksum_audio_infoframe(hdmi_ai);
> >> -	} else if (eld->conn_type == 1) { /* DisplayPort */
> >> +	} else if (eld->info.conn_type == 1) { /* DisplayPort */
> >>   		struct dp_audio_infoframe *dp_ai = &ai.dp;
> >>
> >>   		dp_ai->type		= 0x84;
> >> @@ -1114,7 +1114,7 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
> >>
> >>   	/* Restrict capabilities by ELD if this isn't disabled */
> >>   	if (!static_hdmi_pcm && eld->eld_valid) {
> >> -		snd_hdmi_eld_update_pcm_info(eld, hinfo);
> >> +		snd_hdmi_eld_update_pcm_info(&eld->info, hinfo);
> >>   		if (hinfo->channels_min > hinfo->channels_max ||
> >>   		    !hinfo->rates || !hinfo->formats) {
> >>   			per_cvt->assigned = 0;
> >> @@ -1188,7 +1188,7 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
> >>   	eld->eld_valid = false;
> >>   	if (eld_valid) {
> >>   		if (!snd_hdmi_get_eld(eld, codec, pin_nid))
> >> -			snd_hdmi_show_eld(eld);
> >> +			snd_hdmi_show_eld(&eld->info);
> >>   		else if (repoll) {
> >>   			queue_delayed_work(codec->bus->workq,
> >>   					   &per_pin->work,
> >> --
> >> 1.7.9.5
> >>
> >
> 
> 
> 
> -- 
> David Henningsson, Canonical Ltd.
> https://launchpad.net/~diwic
> [2 0001-ALSA-hda-hdmi-Refactor-hdmi_eld-into-parsed_hdmi_eld.patch <text/x-patch (7bit)>]
> >From 80aca324ff81f630006aeb18f22b78f46428bad3 Mon Sep 17 00:00:00 2001
> From: David Henningsson <david.henningsson at canonical.com>
> Date: Tue, 19 Feb 2013 10:59:34 +0100
> Subject: [PATCH] ALSA: hda - hdmi: Refactor hdmi_eld into parsed_hdmi_eld
> 
> For better readability, the information that is parsed out of the
> ELD data is now put into a separate parsed_hdmi_eld struct.
> 
> Signed-off-by: David Henningsson <david.henningsson at canonical.com>
> ---
>  sound/pci/hda/hda_eld.c    |   46 ++++++++++++++++++++------------------------
>  sound/pci/hda/hda_local.h  |   27 ++++++++++++++++----------
>  sound/pci/hda/patch_hdmi.c |   24 +++++++++++++++--------
>  3 files changed, 54 insertions(+), 43 deletions(-)
> 
> diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c
> index 4c054f4..16066d7 100644
> --- a/sound/pci/hda/hda_eld.c
> +++ b/sound/pci/hda/hda_eld.c
> @@ -246,8 +246,8 @@ static void hdmi_update_short_audio_desc(struct cea_sad *a,
>  /*
>   * Be careful, ELD buf could be totally rubbish!
>   */
> -static int hdmi_update_eld(struct hdmi_eld *e,
> -			   const unsigned char *buf, int size)
> +int snd_hdmi_parse_eld(struct parsed_hdmi_eld *e,
> +			  const unsigned char *buf, int size)
>  {
>  	int mnl;
>  	int i;
> @@ -260,7 +260,6 @@ static int hdmi_update_eld(struct hdmi_eld *e,
>  		goto out_fail;
>  	}
>  
> -	e->eld_size = size;
>  	e->baseline_len = GRAB_BITS(buf, 2, 0, 8);
>  	mnl		= GRAB_BITS(buf, 4, 0, 5);
>  	e->cea_edid_ver	= GRAB_BITS(buf, 4, 5, 3);
> @@ -305,7 +304,6 @@ static int hdmi_update_eld(struct hdmi_eld *e,
>  	if (!e->spk_alloc)
>  		e->spk_alloc = 0xffff;
>  
> -	e->eld_valid = true;
>  	return 0;
>  
>  out_fail:
> @@ -318,17 +316,16 @@ int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid)
>  						 AC_DIPSIZE_ELD_BUF);
>  }
>  
> -int snd_hdmi_get_eld(struct hdmi_eld *eld,
> -		     struct hda_codec *codec, hda_nid_t nid)
> +int snd_hdmi_get_eld(struct hda_codec *codec, hda_nid_t nid,
> +		     unsigned char *buf, int *eld_size)
>  {
>  	int i;
>  	int ret;
>  	int size;
> -	unsigned char *buf;
>  
>  	/*
>  	 * ELD size is initialized to zero in caller function. If no errors and
> -	 * ELD is valid, actual eld_size is assigned in hdmi_update_eld()
> +	 * ELD is valid, actual eld_size is assigned.
>  	 */
>  
>  	size = snd_hdmi_get_eld_size(codec, nid);
> @@ -343,8 +340,6 @@ int snd_hdmi_get_eld(struct hdmi_eld *eld,
>  	}
>  
>  	/* set ELD buffer */
> -	buf = eld->eld_buffer;
> -
>  	for (i = 0; i < size; i++) {
>  		unsigned int val = hdmi_get_eld_data(codec, nid, i);
>  		/*
> @@ -372,8 +367,7 @@ int snd_hdmi_get_eld(struct hdmi_eld *eld,
>  		buf[i] = val;
>  	}
>  
> -	ret = hdmi_update_eld(eld, buf, size);
> -
> +	*eld_size = size;
>  error:
>  	return ret;
>  }
> @@ -438,7 +432,7 @@ void snd_print_channel_allocation(int spk_alloc, char *buf, int buflen)
>  	buf[j] = '\0';	/* necessary when j == 0 */
>  }
>  
> -void snd_hdmi_show_eld(struct hdmi_eld *e)
> +void snd_hdmi_show_eld(struct parsed_hdmi_eld *e)
>  {
>  	int i;
>  
> @@ -487,10 +481,11 @@ static void hdmi_print_sad_info(int i, struct cea_sad *a,
>  static void hdmi_print_eld_info(struct snd_info_entry *entry,
>  				struct snd_info_buffer *buffer)
>  {
> -	struct hdmi_eld *e = entry->private_data;
> +	struct hdmi_eld *eld = entry->private_data;
> +	struct parsed_hdmi_eld *e = &eld->info;
>  	char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE];
>  	int i;
> -	static char *eld_versoin_names[32] = {
> +	static char *eld_version_names[32] = {
>  		"reserved",
>  		"reserved",
>  		"CEA-861D or below",
> @@ -505,15 +500,15 @@ static void hdmi_print_eld_info(struct snd_info_entry *entry,
>  		[4 ... 7] = "reserved"
>  	};
>  
> -	snd_iprintf(buffer, "monitor_present\t\t%d\n", e->monitor_present);
> -	snd_iprintf(buffer, "eld_valid\t\t%d\n", e->eld_valid);
> -	if (!e->eld_valid)
> +	snd_iprintf(buffer, "monitor_present\t\t%d\n", eld->monitor_present);
> +	snd_iprintf(buffer, "eld_valid\t\t%d\n", eld->eld_valid);
> +	if (!eld->eld_valid)
>  		return;
>  	snd_iprintf(buffer, "monitor_name\t\t%s\n", e->monitor_name);
>  	snd_iprintf(buffer, "connection_type\t\t%s\n",
>  				eld_connection_type_names[e->conn_type]);
>  	snd_iprintf(buffer, "eld_version\t\t[0x%x] %s\n", e->eld_ver,
> -					eld_versoin_names[e->eld_ver]);
> +					eld_version_names[e->eld_ver]);
>  	snd_iprintf(buffer, "edid_version\t\t[0x%x] %s\n", e->cea_edid_ver,
>  				cea_edid_version_names[e->cea_edid_ver]);
>  	snd_iprintf(buffer, "manufacture_id\t\t0x%x\n", e->manufacture_id);
> @@ -535,7 +530,8 @@ static void hdmi_print_eld_info(struct snd_info_entry *entry,
>  static void hdmi_write_eld_info(struct snd_info_entry *entry,
>  				struct snd_info_buffer *buffer)
>  {
> -	struct hdmi_eld *e = entry->private_data;
> +	struct hdmi_eld *eld = entry->private_data;
> +	struct parsed_hdmi_eld *e = &eld->info;
>  	char line[64];
>  	char name[64];
>  	char *sname;
> @@ -551,9 +547,9 @@ static void hdmi_write_eld_info(struct snd_info_entry *entry,
>  		 * 	eld_version edid_version
>  		 */
>  		if (!strcmp(name, "monitor_present"))
> -			e->monitor_present = val;
> +			eld->monitor_present = val;
>  		else if (!strcmp(name, "eld_valid"))
> -			e->eld_valid = val;
> +			eld->eld_valid = val;
>  		else if (!strcmp(name, "connection_type"))
>  			e->conn_type = val;
>  		else if (!strcmp(name, "port_id"))
> @@ -627,7 +623,7 @@ void snd_hda_eld_proc_free(struct hda_codec *codec, struct hdmi_eld *eld)
>  #endif /* CONFIG_PROC_FS */
>  
>  /* update PCM info based on ELD */
> -void snd_hdmi_eld_update_pcm_info(struct hdmi_eld *eld,
> +void snd_hdmi_eld_update_pcm_info(struct parsed_hdmi_eld *e,
>  			      struct hda_pcm_stream *hinfo)
>  {
>  	u32 rates;
> @@ -644,8 +640,8 @@ void snd_hdmi_eld_update_pcm_info(struct hdmi_eld *eld,
>  	formats = SNDRV_PCM_FMTBIT_S16_LE;
>  	maxbps = 16;
>  	channels_max = 2;
> -	for (i = 0; i < eld->sad_count; i++) {
> -		struct cea_sad *a = &eld->sad[i];
> +	for (i = 0; i < e->sad_count; i++) {
> +		struct cea_sad *a = &e->sad[i];
>  		rates |= a->rates;
>  		if (a->channels > channels_max)
>  			channels_max = a->channels;
> diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
> index 05f1d59..363cd48 100644
> --- a/sound/pci/hda/hda_local.h
> +++ b/sound/pci/hda/hda_local.h
> @@ -713,10 +713,10 @@ struct cea_sad {
>  /*
>   * ELD: EDID Like Data
>   */
> -struct hdmi_eld {
> -	bool	monitor_present;
> -	bool	eld_valid;
> -	int	eld_size;
> +struct parsed_hdmi_eld {
> +	/*
> +	 * all fields will be cleared before updating ELD
> +	 */
>  	int	baseline_len;
>  	int	eld_ver;
>  	int	cea_edid_ver;
> @@ -731,19 +731,26 @@ struct hdmi_eld {
>  	int	spk_alloc;
>  	int	sad_count;
>  	struct cea_sad sad[ELD_MAX_SAD];
> -	/*
> -	 * all fields above eld_buffer will be cleared before updating ELD
> -	 */
> +};
> +
> +struct hdmi_eld {
> +	bool	monitor_present;
> +	bool	eld_valid;
> +	int	eld_size;
>  	char    eld_buffer[ELD_MAX_SIZE];
> +	struct parsed_hdmi_eld info;
>  #ifdef CONFIG_PROC_FS
>  	struct snd_info_entry *proc_entry;
>  #endif
>  };
>  
>  int snd_hdmi_get_eld_size(struct hda_codec *codec, hda_nid_t nid);
> -int snd_hdmi_get_eld(struct hdmi_eld *, struct hda_codec *, hda_nid_t);
> -void snd_hdmi_show_eld(struct hdmi_eld *eld);
> -void snd_hdmi_eld_update_pcm_info(struct hdmi_eld *eld,
> +int snd_hdmi_get_eld(struct hda_codec *codec, hda_nid_t nid,
> +		     unsigned char *buf, int *eld_size);
> +int snd_hdmi_parse_eld(struct parsed_hdmi_eld *e,
> +		       const unsigned char *buf, int size);
> +void snd_hdmi_show_eld(struct parsed_hdmi_eld *e);
> +void snd_hdmi_eld_update_pcm_info(struct parsed_hdmi_eld *e,
>  			      struct hda_pcm_stream *hinfo);
>  
>  #ifdef CONFIG_PROC_FS
> diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
> index 7a73dfb..dab147a 100644
> --- a/sound/pci/hda/patch_hdmi.c
> +++ b/sound/pci/hda/patch_hdmi.c
> @@ -529,7 +529,7 @@ static int hdmi_channel_allocation(struct hdmi_eld *eld, int channels)
>  	 * expand ELD's notions to match the ones used by Audio InfoFrame.
>  	 */
>  	for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) {
> -		if (eld->spk_alloc & (1 << i))
> +		if (eld->info.spk_alloc & (1 << i))
>  			spk_mask |= eld_speaker_allocation_bits[i];
>  	}
>  
> @@ -543,7 +543,7 @@ static int hdmi_channel_allocation(struct hdmi_eld *eld, int channels)
>  		}
>  	}
>  
> -	snd_print_channel_allocation(eld->spk_alloc, buf, sizeof(buf));
> +	snd_print_channel_allocation(eld->info.spk_alloc, buf, sizeof(buf));
>  	snd_printdd("HDMI: select CA 0x%x for %d-channel allocation: %s\n",
>  		    ca, channels, buf);
>  
> @@ -884,7 +884,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
>  		ca = 0;
>  
>  	memset(&ai, 0, sizeof(ai));
> -	if (eld->conn_type == 0) { /* HDMI */
> +	if (eld->info.conn_type == 0) { /* HDMI */
>  		struct hdmi_audio_infoframe *hdmi_ai = &ai.hdmi;
>  
>  		hdmi_ai->type		= 0x84;
> @@ -893,7 +893,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
>  		hdmi_ai->CC02_CT47	= channels - 1;
>  		hdmi_ai->CA		= ca;
>  		hdmi_checksum_audio_infoframe(hdmi_ai);
> -	} else if (eld->conn_type == 1) { /* DisplayPort */
> +	} else if (eld->info.conn_type == 1) { /* DisplayPort */
>  		struct dp_audio_infoframe *dp_ai = &ai.dp;
>  
>  		dp_ai->type		= 0x84;
> @@ -1114,7 +1114,7 @@ static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
>  
>  	/* Restrict capabilities by ELD if this isn't disabled */
>  	if (!static_hdmi_pcm && eld->eld_valid) {
> -		snd_hdmi_eld_update_pcm_info(eld, hinfo);
> +		snd_hdmi_eld_update_pcm_info(&eld->info, hinfo);
>  		if (hinfo->channels_min > hinfo->channels_max ||
>  		    !hinfo->rates || !hinfo->formats) {
>  			per_cvt->assigned = 0;
> @@ -1185,10 +1185,18 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
>  		"HDMI status: Codec=%d Pin=%d Presence_Detect=%d ELD_Valid=%d\n",
>  		codec->addr, pin_nid, eld->monitor_present, eld_valid);
>  
> -	eld->eld_valid = false;
>  	if (eld_valid) {
> -		if (!snd_hdmi_get_eld(eld, codec, pin_nid))
> -			snd_hdmi_show_eld(eld);
> +		if (snd_hdmi_get_eld(codec, pin_nid, eld->eld_buffer,
> +						     &eld->eld_size) < 0)
> +			eld_valid = false;
> +		if (eld_valid && snd_hdmi_parse_eld(&eld->info, eld->eld_buffer,
> +						    eld->eld_size) < 0)
> +			eld_valid = false;
> +
> +		if (eld_valid) {
> +			snd_hdmi_show_eld(&eld->info);
> +			eld->eld_valid = true;
> +		}
>  		else if (repoll) {
>  			queue_delayed_work(codec->bus->workq,
>  					   &per_pin->work,
> -- 
> 1.7.9.5
> 


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