path: root/sound/x86
diff options
authorTakashi Iwai <tiwai@suse.de>2018-02-20 17:33:45 +0100
committerTakashi Iwai <tiwai@suse.de>2018-02-22 11:51:36 +0100
commit7229b12f5da33d5c376ee264f063703844b8092d (patch)
treeb00055f5c15546419747de25152f707ee232a187 /sound/x86
parentfdcc968a3b290407bcba9d4c90e2fba6d8d928f1 (diff)
ALSA: x86: hdmi: Add single_port option for compatible behavior
The recent support for the multiple PCM devices allowed user to use multiple HDMI/DP outputs, but at the same time, the PCM stream assignment has been changed, too. Due to that, the former PCM#0 (there was only one stream in the past) is likely assigned to a different one (e.g. PCM#2), and it ends up with the regression when user sticks with the fixed configuration using the device#0. Although the multiple monitor support shouldn't matter when user deploys the backend like PulseAudio that checks the jack detection state, the behavior change isn't always acceptable for some users. As a mitigation, this patch introduces an option to switch the behavior back to the old-good-days: when the new option, single_port=1, is passed, the driver creates only a single PCM device, and it's assigned to the first connected one, like the earlier versions did. The option is turned off as default still to support the multiple monitors. Fixes: 8a2d6ae1f737 ("ALSA: x86: Register multiple PCM devices for the LPE audio card") Reported-and-tested-by: Hubert Mantel <mantel@metadox.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/x86')
1 files changed, 11 insertions, 3 deletions
diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index a0951505c7f5..96115c401292 100644
--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -50,6 +50,7 @@
/*standard module options for ALSA. This module supports only one card*/
static int hdmi_card_index = SNDRV_DEFAULT_IDX1;
static char *hdmi_card_id = SNDRV_DEFAULT_STR1;
+static bool single_port;
module_param_named(index, hdmi_card_index, int, 0444);
@@ -57,6 +58,9 @@ MODULE_PARM_DESC(index,
module_param_named(id, hdmi_card_id, charp, 0444);
"ID string for INTEL Intel HDMI Audio controller.");
+module_param(single_port, bool, 0444);
+ "Single-port mode (for compatibility)");
* ELD SA bits in the CEA Speaker Allocation data block
@@ -1579,7 +1583,11 @@ static irqreturn_t display_pipe_interrupt_handler(int irq, void *dev_id)
static void notify_audio_lpe(struct platform_device *pdev, int port)
struct snd_intelhad_card *card_ctx = platform_get_drvdata(pdev);
- struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
+ struct snd_intelhad *ctx;
+ ctx = &card_ctx->pcm_ctx[single_port ? 0 : port];
+ if (single_port)
+ ctx->port = port;
@@ -1816,7 +1824,7 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
card_ctx->num_pipes = pdata->num_pipes;
- card_ctx->num_ports = pdata->num_ports;
+ card_ctx->num_ports = single_port ? 1 : pdata->num_ports;
for_each_port(card_ctx, port) {
struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
@@ -1824,7 +1832,7 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
ctx->card_ctx = card_ctx;
ctx->dev = card_ctx->dev;
- ctx->port = port;
+ ctx->port = single_port ? -1 : port;
ctx->pipe = -1;
INIT_WORK(&ctx->hdmi_audio_wq, had_audio_wq);