linux-kernel - [PATCH v2] ASoC: Intel: sof_rt5682: Ignore the speaker amp when there isn't one.

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Message-Id: <20200103112158.v2.1.Ib87c4a7fbb3fc818ea12198e291b87dc2d5bc8c2@changeid>
Date:   Fri,  3 Jan 2020 11:22:06 +1100
From:   Sam McNally <sammc@...omium.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Sam McNally <sammc@...omium.org>, Jaroslav Kysela <perex@...ex.cz>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        alsa-devel@...a-project.org,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Sathya Prakash M R <sathya.prakash.m.r@...el.com>,
        Mark Brown <broonie@...nel.org>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Takashi Iwai <tiwai@...e.com>,
        Jairaj Arava <jairaj.arava@...el.com>,
        Xun Zhang <xun2.zhang@...el.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Sathyanarayana Nujella <sathyanarayana.nujella@...el.com>
Subject: [PATCH v2] ASoC: Intel: sof_rt5682: Ignore the speaker amp when there isn't one.

Some members of the Google_Hatch family include a rt5682, but not a
speaker amp. When a speaker amp is also present, the first 10EC5682
entry in snd_soc_acpi_intel_cml_machines[] matches, finding the
MX98357A as well, resulting in the quirk_data field in the
snd_soc_acpi_mach being non-null. When only the rt5682 is present, the
second 10EC5682 entry is matched instead and quirk_data is left null.

The sof_rt5682 driver's DMI data matching identifies that a speaker amp
is present for all Google_Hatch family devices. Detect cases where there
is no speaker amp by checking for a null quirk_data in the
snd_soc_acpi_mach and remove the speaker amp bit in that case.

Signed-off-by: Sam McNally <sammc@...omium.org>
---

Changes in v2:
- Added details about the relevant ACPI matches to the description

 sound/soc/intel/boards/sof_rt5682.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sound/soc/intel/boards/sof_rt5682.c b/sound/soc/intel/boards/sof_rt5682.c
index ad8a2b4bc709..8a13231dee15 100644
--- a/sound/soc/intel/boards/sof_rt5682.c
+++ b/sound/soc/intel/boards/sof_rt5682.c
@@ -603,6 +603,14 @@ static int sof_audio_probe(struct platform_device *pdev)
 
 	dmi_check_system(sof_rt5682_quirk_table);
 
+	mach = (&pdev->dev)->platform_data;
+
+	/* A speaker amp might not be present when the quirk claims one is.
+	 * Detect this via whether the machine driver match includes quirk_data.
+	 */
+	if ((sof_rt5682_quirk & SOF_SPEAKER_AMP_PRESENT) && !mach->quirk_data)
+		sof_rt5682_quirk &= ~SOF_SPEAKER_AMP_PRESENT;
+
 	if (soc_intel_is_byt() || soc_intel_is_cht()) {
 		is_legacy_cpu = 1;
 		dmic_be_num = 0;
@@ -663,7 +671,6 @@ static int sof_audio_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&ctx->hdmi_pcm_list);
 
 	sof_audio_card_rt5682.dev = &pdev->dev;
-	mach = (&pdev->dev)->platform_data;
 
 	/* set platform name for each dailink */
 	ret = snd_soc_fixup_dai_links_platform_name(&sof_audio_card_rt5682,
-- 
2.24.1.735.g03f4e72817-goog