linux-kernel - [PATCH] ALSA: hda: Poll jack events for LS7A HD-Audio

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Message-ID: <20241115150653.2819100-1-chenhuacai@loongson.cn>
Date: Fri, 15 Nov 2024 23:06:53 +0800
From: Huacai Chen <chenhuacai@...ngson.cn>
To: Takashi Iwai <tiwai@...e.com>,
	Jaroslav Kysela <perex@...ex.cz>,
	Huacai Chen <chenhuacai@...nel.org>
Cc: linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Xuerui Wang <kernel@...0n.name>,
	Jiaxun Yang <jiaxun.yang@...goat.com>,
	Huacai Chen <chenhuacai@...ngson.cn>,
	stable@...r.kernel.org
Subject: [PATCH] ALSA: hda: Poll jack events for LS7A HD-Audio

LS7A HD-Audio disable interrupts and use polling mode due to hardware
drawbacks. As a result, unsolicited jack events are also unusable. If
we want to support headphone hotplug, we need to also poll jack events.

Here we use 1500ms as the poll interval if no module parameter specify
it.

Cc: stable@...r.kernel.org
Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
---
 sound/pci/hda/hda_intel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index b4540c5cd2a6..5060d5428caf 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1867,6 +1867,8 @@ static int azx_first_init(struct azx *chip)
 		bus->polling_mode = 1;
 		bus->not_use_interrupts = 1;
 		bus->access_sdnctl_in_dword = 1;
+		if (!chip->jackpoll_interval)
+			chip->jackpoll_interval = msecs_to_jiffies(1500);
 	}
 
 	err = pcim_iomap_regions(pci, 1 << 0, "ICH HD audio");
-- 
2.43.5