linux-kernel - [PATCH] ASoC: qcom: lpass-cpu: Fix fallback SD line index handling

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Date:   Fri, 30 Dec 2022 22:15:45 -0800
From:   Brian Norris <computersforpeace@...il.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Banajit Goswami <bgoswami@...cinc.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     alsa-devel@...a-project.org, <linux-kernel@...r.kernel.org>,
        Brian Norris <computersforpeace@...il.com>,
        stable@...r.kernel.org
Subject: [PATCH] ASoC: qcom: lpass-cpu: Fix fallback SD line index handling

These indices should reference the ID placed within the dai_driver
array, not the indices of the array itself.

This fixes commit 4ff028f6c108 ("ASoC: qcom: lpass-cpu: Make I2S SD
lines configurable"), which among others, broke IPQ8064 audio
(sound/soc/qcom/lpass-ipq806x.c) because it uses ID 4 but we'd stop
initializing the mi2s_playback_sd_mode and mi2s_capture_sd_mode arrays
at ID 0.

Fixes: 4ff028f6c108 ("ASoC: qcom: lpass-cpu: Make I2S SD lines configurable")
Cc: <stable@...r.kernel.org>
Signed-off-by: Brian Norris <computersforpeace@...il.com>
---
 sound/soc/qcom/lpass-cpu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index 54353842dc07..dbdaaa85ce48 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -1037,10 +1037,11 @@ static void of_lpass_cpu_parse_dai_data(struct device *dev,
 					struct lpass_data *data)
 {
 	struct device_node *node;
-	int ret, id;
+	int ret, i, id;
 
 	/* Allow all channels by default for backwards compatibility */
-	for (id = 0; id < data->variant->num_dai; id++) {
+	for (i = 0; i < data->variant->num_dai; i++) {
+		id = data->variant->dai_driver[i].id;
 		data->mi2s_playback_sd_mode[id] = LPAIF_I2SCTL_MODE_8CH;
 		data->mi2s_capture_sd_mode[id] = LPAIF_I2SCTL_MODE_8CH;
 	}
-- 
2.39.0