linux-kernel - Re: [PATCH v2 2/2] ASoC: codec: lpass-rx-macro: add suppor for 2.5 codec version

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Date: Wed, 12 Jun 2024 15:37:56 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: broonie@...nel.org, perex@...ex.cz, lgirdwood@...il.com,
 alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
 linux-arm-msm@...r.kernel.org, krzk+dt@...nel.org,
 neil.armstrong@...aro.org, krzysztof.kozlowski@...aro.org
Subject: Re: [PATCH v2 2/2] ASoC: codec: lpass-rx-macro: add suppor for 2.5
 codec version



On 07/06/2024 12:03, Dmitry Baryshkov wrote:
> On Thu, Jun 06, 2024 at 01:25:59PM +0100, srinivas.kandagatla@...aro.org wrote:
>> From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>>
>> LPASS Codec v2.5 has significant changes in the rx register offsets.
>> Due to this headset playback on SM8550, SM8650, x1e80100 and all SoCs
>> after SM8450 have only Left working.
>>
>> This patch adjusts the registers to accomdate 2.5 changes. With this
>> fixed now L and R are functional on Headset playback.
>>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>> ---
>>   sound/soc/codecs/lpass-rx-macro.c | 565 ++++++++++++++++++++++--------
>>   1 file changed, 410 insertions(+), 155 deletions(-)
>>
>> diff --git a/sound/soc/codecs/lpass-rx-macro.c b/sound/soc/codecs/lpass-rx-macro.c
>> index f35187d69cac..bb8ede0e7076 100644
>> --- a/sound/soc/codecs/lpass-rx-macro.c
>> +++ b/sound/soc/codecs/lpass-rx-macro.c
>>   
>>   static int rx_macro_probe(struct platform_device *pdev)
>>   {
>> +	struct reg_default *reg_defaults;
>>   	struct device *dev = &pdev->dev;
>>   	kernel_ulong_t flags;
>>   	struct rx_macro *rx;
>>   	void __iomem *base;
>> -	int ret;
>> +	int ret, def_count;
>>   
>>   	flags = (kernel_ulong_t)device_get_match_data(dev);
>>   
>> @@ -3567,6 +3793,33 @@ static int rx_macro_probe(struct platform_device *pdev)
>>   		goto err;
>>   	}
>>   
>> +	rx->codec_version = lpass_macro_get_codec_version();
> 
> What guarantees that VA macro has been probed already? If I'm not
> mistaken, we might easily get a default '0' here instead of a correct
> version.

fsgen(Frame sync gen) clk is derived from VA macro, so if we are here 
that means the va macro is probed.

> 
>> +	switch (rx->codec_version) {
>> +	case LPASS_CODEC_VERSION_2_5 ... LPASS_CODEC_VERSION_2_8:
>> +		rx->rxn_reg_offset = 0xc0;
>> +		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)
>> +			return -ENOMEM;
>> +		memcpy(&reg_defaults[0], rx_defaults, sizeof(rx_defaults));
>> +		memcpy(&reg_defaults[ARRAY_SIZE(rx_defaults)],
>> +				rx_2_5_defaults, sizeof(rx_2_5_defaults));
>> +		break;
>> +	default:
>> +		rx->rxn_reg_offset = 0x80;
>> +		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)
>> +			return -ENOMEM;
>> +		memcpy(&reg_defaults[0], rx_defaults, sizeof(rx_defaults));
>> +		memcpy(&reg_defaults[ARRAY_SIZE(rx_defaults)],
>> +				rx_pre_2_5_defaults, sizeof(rx_pre_2_5_defaults));
>> +		break;
>> +	}
>> +
>> +	rx_regmap_config.reg_defaults = reg_defaults,
>> +	rx_regmap_config.num_reg_defaults = def_count;
>> +
>>   	rx->regmap = devm_regmap_init_mmio(dev, base, &rx_regmap_config);
>>   	if (IS_ERR(rx->regmap)) {
>>   		ret = PTR_ERR(rx->regmap);
>> @@ -3629,6 +3882,7 @@ static int rx_macro_probe(struct platform_device *pdev)
>>   	if (ret)
>>   		goto err_clkout;
>>   
>> +	kfree(reg_defaults);
>>   	return 0;
>>   
>>   err_clkout:
>> @@ -3642,6 +3896,7 @@ static int rx_macro_probe(struct platform_device *pdev)
>>   err_dcodec:
>>   	clk_disable_unprepare(rx->macro);
>>   err:
>> +	kfree(reg_defaults);
>>   	lpass_macro_pds_exit(rx->pds);
>>   
>>   	return ret;
>> -- 
>> 2.21.0
>>
>