Gaggery Tsai
35ed17f238
Alternative kernel package based on Arch Linux 6.19.9 with 12 upstream SDCA backport patches that enable audio on Intel Panther Lake systems (Dell XPS 2026 and similar hardware with CS35L57 SoundWire amps). The stock 6.19.9 kernel lacks the SDCA class/function topology driver code needed for PTL audio. These patches backport the SDCA support from mainline v7.0 to the stable 6.19.x series. Tested on Dell XPS 16 (Panther Lake): all 4 CS35L57 amps probe with calibration, SDCA jack detection works, sof-soundwire sound card registers successfully. CONFIG_RUST is disabled to avoid build failures with newer Rust toolchain versions. Rust is not required for audio functionality.
44 lines
1.9 KiB
Diff
44 lines
1.9 KiB
Diff
From b92178f5dd8fa8f70e26d4e2b055327842e58a74 Mon Sep 17 00:00:00 2001
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From: Charles Keepax <ckeepax@opensource.cirrus.com>
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Date: Thu, 15 Jan 2026 13:17:26 +0000
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Subject: [PATCH 10/17] ASoC: SDCA: Add NO_DIRECT_COMPLETE flag to class driver
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The SDCA class driver currently expects the device will be fully powered
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down on system suspend but not on runtime suspend. This is typically
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required as when audio is not active (ie. runtime suspend) jack detect
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is expected to still function, but when the whole system is hibernated
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there is no need to recognise audio jack events. This means the class
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driver needs to always be informed of a system suspend, so the direct
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complete optimisation (where PM will skip calling system suspend if the
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device is runtime suspended) is not appropriate for the SDCA class
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driver.
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Add the NO_DIRECT_COMPLETE flag to prevent this optimisation from
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running against this driver.
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Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
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Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
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link: https://github.com/thesofproject/linux/blob/ec0e6c69113f4b342ee8eabec286dea33d98a7cc/drivers/soundwire/intel_auxdevice.c#L568
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Link: https://patch.msgid.link/20260115131727.373738-1-ckeepax@opensource.cirrus.com
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Signed-off-by: Mark Brown <broonie@kernel.org>
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---
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sound/soc/sdca/sdca_class_function.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/sound/soc/sdca/sdca_class_function.c b/sound/soc/sdca/sdca_class_function.c
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index 0afa41c1ee93..98fd3fd1052b 100644
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--- a/sound/soc/sdca/sdca_class_function.c
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+++ b/sound/soc/sdca/sdca_class_function.c
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@@ -377,6 +377,8 @@ static int class_function_probe(struct auxiliary_device *auxdev,
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if (ret)
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return ret;
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+ dev_pm_set_driver_flags(dev, DPM_FLAG_NO_DIRECT_COMPLETE);
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+
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pm_runtime_set_autosuspend_delay(dev, 200);
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pm_runtime_use_autosuspend(dev);
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pm_runtime_set_active(dev);
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--
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2.43.0
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