linux-kernel - [PATCH v3 7/9] ASoC: mediatek: mt8183-afe-pcm: Support >32 bit DMA addresses

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Message-ID: <20250612074901.4023253-8-wenst@chromium.org>
Date: Thu, 12 Jun 2025 15:48:58 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Cc: Chen-Yu Tsai <wenst@...omium.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jiaxin Yu <jiaxin.yu@...iatek.com>,
	linux-sound@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 7/9] ASoC: mediatek: mt8183-afe-pcm: Support >32 bit DMA addresses

The AFE DMA hardware supports up to 34 bits for DMA addresses. This is
missing from the driver and prevents reserved memory regions from
working properly when the allocated region is above the 4GB line.

Fill in the related register offsets for each DAI, and also set the
DMA mask. Also fill in the LSB end register offsets for completeness.

Fixes: a94aec035a12 ("ASoC: mediatek: mt8183: add platform driver")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
Changes in v3:
- Rebased on top of "mt8183-afe-pcm: Shorten source code"
---
 sound/soc/mediatek/mt8183/mt8183-afe-pcm.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/sound/soc/mediatek/mt8183/mt8183-afe-pcm.c b/sound/soc/mediatek/mt8183/mt8183-afe-pcm.c
index 9b6b45c646e6..7383184097a4 100644
--- a/sound/soc/mediatek/mt8183/mt8183-afe-pcm.c
+++ b/sound/soc/mediatek/mt8183/mt8183-afe-pcm.c
@@ -6,6 +6,7 @@
 // Author: KaiChieh Chuang <kaichieh.chuang@...iatek.com>
 
 #include <linux/delay.h>
+#include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of.h>
@@ -432,6 +433,9 @@ static const struct snd_soc_component_driver mt8183_afe_pcm_dai_component = {
 		.reg_ofs_base = AFE_##_id##_BASE,	\
 		.reg_ofs_cur = AFE_##_id##_CUR,		\
 		.reg_ofs_end = AFE_##_id##_END,		\
+		.reg_ofs_base_msb = AFE_##_id##_BASE_MSB,	\
+		.reg_ofs_cur_msb = AFE_##_id##_CUR_MSB,		\
+		.reg_ofs_end_msb = AFE_##_id##_END_MSB,		\
 		.fs_reg = (_fs_reg),			\
 		.fs_shift = _id##_MODE_SFT,		\
 		.fs_maskbit = _id##_MODE_MASK,		\
@@ -463,11 +467,17 @@ static const struct snd_soc_component_driver mt8183_afe_pcm_dai_component = {
 #define AFE_VUL12_BASE		AFE_VUL_D2_BASE
 #define AFE_VUL12_CUR		AFE_VUL_D2_CUR
 #define AFE_VUL12_END		AFE_VUL_D2_END
+#define AFE_VUL12_BASE_MSB	AFE_VUL_D2_BASE_MSB
+#define AFE_VUL12_CUR_MSB	AFE_VUL_D2_CUR_MSB
+#define AFE_VUL12_END_MSB	AFE_VUL_D2_END_MSB
 #define AWB2_HD_ALIGN_SFT	AWB2_ALIGN_SFT
 #define VUL12_DATA_SFT		VUL12_MONO_SFT
 #define AFE_HDMI_BASE		AFE_HDMI_OUT_BASE
 #define AFE_HDMI_CUR		AFE_HDMI_OUT_CUR
 #define AFE_HDMI_END		AFE_HDMI_OUT_END
+#define AFE_HDMI_BASE_MSB	AFE_HDMI_OUT_BASE_MSB
+#define AFE_HDMI_CUR_MSB	AFE_HDMI_OUT_CUR_MSB
+#define AFE_HDMI_END_MSB	AFE_HDMI_OUT_END_MSB
 
 static const struct mtk_base_memif_data memif_data[MT8183_MEMIF_NUM] = {
 	MT8183_MEMIF(DL1, AFE_DAC_CON1, AFE_DAC_CON1),
@@ -764,6 +774,10 @@ static int mt8183_afe_pcm_dev_probe(struct platform_device *pdev)
 	struct reset_control *rstc;
 	int i, irq_id, ret;
 
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(34));
+	if (ret)
+		return ret;
+
 	afe = devm_kzalloc(&pdev->dev, sizeof(*afe), GFP_KERNEL);
 	if (!afe)
 		return -ENOMEM;
-- 
2.50.0.rc1.591.g9c95f17f64-goog