linux-kernel - [PATCH REVIEW 1/2] ASoC: codecs: lpass-rx-macro: fix RXn(rx,n) macro for DSM

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Message-ID: <20240925043823.520218-1-alexey.klimov@linaro.org>
Date: Wed, 25 Sep 2024 05:38:22 +0100
From: Alexey Klimov <alexey.klimov@...aro.org>
To: srinivas.kandagatla@...aro.org,
	a39.skl@...il.com,
	linux-sound@...r.kernel.org
Cc: lgirdwood@...il.com,
	broonie@...nel.org,
	perex@...ex.cz,
	tiwai@...e.com,
	alsa-devel@...a-project.org,
	linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	krzysztof.kozlowski@...aro.org,
	vkoul@...nel.org,
	klimov.linux@...il.com
Subject: [PATCH REVIEW 1/2] ASoC: codecs: lpass-rx-macro: fix RXn(rx,n) macro for DSM_CTL and SEC7 regs

Turns out some registers of pre-2.5 version of rxmacro codecs are not
located at the expected offsets but 0xc further away in memory.
So far the detected registers are CDC_RX_RX2_RX_PATH_SEC7 and
CDC_RX_RX2_RX_PATH_DSM_CTL.

CDC_RX_RXn_RX_PATH_DSM_CTL(rx, n) macro incorrectly generates the address
0x540 for RX2 but it should be 0x54C and it also overwrites
CDC_RX_RX2_RX_PATH_SEC7 which is located at 0x540.
The same goes for CDC_RX_RXn_RX_PATH_SEC7(rx, n).

Fix this by introducing additional rxn_reg_stride2 offset. For 2.5 version
and above this offset will be equal to 0.
With such change the corresponding RXn() macros will generate the same
values for 2.5 codec version for all RX paths and the same old values
for pre-2.5 version for RX0 and RX1. However for the latter case with RX2 path
it will also add 2 * rxn_reg_stride2 on top.

Signed-off-by: Alexey Klimov <alexey.klimov@...aro.org>
---
 sound/soc/codecs/lpass-rx-macro.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/lpass-rx-macro.c b/sound/soc/codecs/lpass-rx-macro.c
index 71e0d3bffd3f..9288ddb705fe 100644
--- a/sound/soc/codecs/lpass-rx-macro.c
+++ b/sound/soc/codecs/lpass-rx-macro.c
@@ -202,12 +202,14 @@
 #define CDC_RX_RXn_RX_PATH_SEC3(rx, n)	(0x042c  + rx->rxn_reg_stride * n)
 #define CDC_RX_RX0_RX_PATH_SEC4		(0x0430)
 #define CDC_RX_RX0_RX_PATH_SEC7		(0x0434)
-#define CDC_RX_RXn_RX_PATH_SEC7(rx, n)	(0x0434  + rx->rxn_reg_stride * n)
+#define CDC_RX_RXn_RX_PATH_SEC7(rx, n)		\
+	(0x0434 + rx->rxn_reg_stride * n + n * (n - 1) * rx->rxn_reg_stride2)
 #define CDC_RX_DSM_OUT_DELAY_SEL_MASK	GENMASK(2, 0)
 #define CDC_RX_DSM_OUT_DELAY_TWO_SAMPLE	0x2
 #define CDC_RX_RX0_RX_PATH_MIX_SEC0	(0x0438)
 #define CDC_RX_RX0_RX_PATH_MIX_SEC1	(0x043C)
-#define CDC_RX_RXn_RX_PATH_DSM_CTL(rx, n)	(0x0440  + rx->rxn_reg_stride * n)
+#define CDC_RX_RXn_RX_PATH_DSM_CTL(rx, n)	\
+	(0x0440 + rx->rxn_reg_stride * n + n * (n - 1) * rx->rxn_reg_stride2)
 #define CDC_RX_RXn_DSM_CLK_EN_MASK	BIT(0)
 #define CDC_RX_RX0_RX_PATH_DSM_CTL	(0x0440)
 #define CDC_RX_RX0_RX_PATH_DSM_DATA1	(0x0444)
@@ -645,6 +647,7 @@ struct rx_macro {
 	int rx_mclk_cnt;
 	enum lpass_codec_version codec_version;
 	int rxn_reg_stride;
+	int rxn_reg_stride2;
 	bool is_ear_mode_on;
 	bool hph_pwr_mode;
 	bool hph_hd2_mode;
@@ -3821,6 +3824,7 @@ static int rx_macro_probe(struct platform_device *pdev)
 	case LPASS_CODEC_VERSION_2_0:
 	case LPASS_CODEC_VERSION_2_1:
 		rx->rxn_reg_stride = 0x80;
+		rx->rxn_reg_stride2 = 0x6;
 		def_count = ARRAY_SIZE(rx_defaults) + ARRAY_SIZE(rx_pre_2_5_defaults);
 		reg_defaults = kmalloc_array(def_count, sizeof(struct reg_default), GFP_KERNEL);
 		if (!reg_defaults)
@@ -3834,6 +3838,7 @@ static int rx_macro_probe(struct platform_device *pdev)
 	case LPASS_CODEC_VERSION_2_7:
 	case LPASS_CODEC_VERSION_2_8:
 		rx->rxn_reg_stride = 0xc0;
+		rx->rxn_reg_stride2 = 0x0;
 		def_count = ARRAY_SIZE(rx_defaults) + ARRAY_SIZE(rx_2_5_defaults);
 		reg_defaults = kmalloc_array(def_count, sizeof(struct reg_default), GFP_KERNEL);
 		if (!reg_defaults)
-- 
2.45.2