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Date: Mon, 30 Sep 2013 12:29:07 +0200
From: David Henningsson <david.henningsson@...onical.com>
To: Luis Henriques <luis.henriques@...onical.com>,
linux-kernel@...r.kernel.org, stable@...r.kernel.org,
kernel-team@...ts.ubuntu.com
CC: Takashi Iwai <tiwai@...e.de>
Subject: Re: [PATCH 026/104] ALSA: hda - hdmi: Refactor hdmi_eld into parsed_hdmi_eld
On 09/30/2013 12:10 PM, Luis Henriques wrote:
> 3.5.7.22 -stable review patch. If anyone has any objections, please let me know.
>
> ------------------
>
> From: David Henningsson <david.henningsson@...onical.com>
>
> commit 1613d6b46b433f07f1d2703e4bd102802dcd75a4 upstream.
>
> 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@...onical.com>
> Signed-off-by: Takashi Iwai <tiwai@...e.de>
> [ luis: 3.5.y-prereq for:
> 18e3918 ALSA: hda - hdmi: Fallback to ALSA allocation when selecting CA ]
I don't think this is really a prereq. Sorting out the fuzz in
hdmi_channel_allocation seems quite trivial to me, so I would suggest
doing so instead.
If you do go ahead and backport this patch, a bit of testing wouldn't
hurt: this patch was part of a bigger patch set, and I don't think
anyone tested just this one without the bigger set.
> Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
> ---
> sound/pci/hda/hda_eld.c | 46 +++++++++++++++++++++-------------------------
> sound/pci/hda/hda_local.h | 27 +++++++++++++++++----------
> sound/pci/hda/patch_hdmi.c | 28 +++++++++++++++++++---------
> 3 files changed, 57 insertions(+), 44 deletions(-)
>
> diff --git a/sound/pci/hda/hda_eld.c b/sound/pci/hda/hda_eld.c
> index 86f6468..f076dab 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 = 0;
> 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 9a096a8..da2eadc 100644
> --- a/sound/pci/hda/hda_local.h
> +++ b/sound/pci/hda/hda_local.h
> @@ -616,10 +616,10 @@ 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;
> @@ -634,19 +634,26 @@ 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 375e0ff..bbd5e8d 100644
> --- a/sound/pci/hda/patch_hdmi.c
> +++ b/sound/pci/hda/patch_hdmi.c
> @@ -499,7 +499,7 @@ 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];
> }
>
> @@ -513,7 +513,7 @@ 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);
>
> @@ -705,7 +705,7 @@ static void hdmi_setup_audio_infoframe(struct hda_codec *codec, int pin_idx,
> ca = hdmi_channel_allocation(eld, channels);
>
> 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;
> @@ -714,7 +714,7 @@ 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;
> @@ -924,7 +924,7 @@ 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;
> @@ -985,8 +985,6 @@ static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
> int present = snd_hda_pin_sense(codec, pin_nid);
> bool eld_valid = false;
>
> - memset(eld, 0, offsetof(struct hdmi_eld, eld_buffer));
> -
> eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
> if (eld->monitor_present)
> eld_valid = !!(present & AC_PINSENSE_ELDV);
> @@ -997,8 +995,20 @@ 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);
> + if (snd_hdmi_get_eld(codec, pin_nid, eld->eld_buffer,
> + &eld->eld_size) < 0)
> + eld_valid = false;
> + else {
> + memset(&eld->info, 0, sizeof(struct parsed_hdmi_eld));
> + if (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,
>
--
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic
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