linux-kernel - Re: [PATCH 5/5] ASoC: mediatek: mt8188-mt6359: Use bitfield macros for registers

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Message-ID: <8bbbc852-6139-29d4-417c-a2d9c77c192f@baylibre.com>
Date:   Thu, 8 Jun 2023 11:50:33 +0200
From:   Alexandre Mergnat <amergnat@...libre.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, broonie@...nel.org
Cc:     lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        matthias.bgg@...il.com, trevor.wu@...iatek.com,
        dan.carpenter@...aro.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH 5/5] ASoC: mediatek: mt8188-mt6359: Use bitfield macros
 for registers

On 08/06/2023 10:47, AngeloGioacchino Del Regno wrote:
> Replace open coded instances of FIELD_GET() with it, move register
> definitions at the top of the file and also replace magic numbers
> with register definitions.
> 
> While at it, also change a regmap_update_bits() call to regmap_write()
> because the top 29 bits of AUD_TOP_CFG (31:3) are reserved (unused).
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>   sound/soc/mediatek/mt8188/mt8188-mt6359.c | 32 ++++++++++++++---------
>   1 file changed, 19 insertions(+), 13 deletions(-)
> 
> diff --git a/sound/soc/mediatek/mt8188/mt8188-mt6359.c b/sound/soc/mediatek/mt8188/mt8188-mt6359.c
> index 5b2660139421..ac69c23e0da1 100644
> --- a/sound/soc/mediatek/mt8188/mt8188-mt6359.c
> +++ b/sound/soc/mediatek/mt8188/mt8188-mt6359.c
> @@ -6,6 +6,7 @@
>    * Author: Trevor Wu <trevor.wu@...iatek.com>
>    */
>   
> +#include <linux/bitfield.h>
>   #include <linux/input.h>
>   #include <linux/module.h>
>   #include <linux/of_device.h>
> @@ -19,6 +20,15 @@
>   #include "../common/mtk-afe-platform-driver.h"
>   #include "../common/mtk-soundcard-driver.h"
>   
> +#define CKSYS_AUD_TOP_CFG	0x032c
> + #define RG_TEST_ON		BIT(0)
> + #define RG_TEST_TYPE		BIT(2)
> +#define CKSYS_AUD_TOP_MON	0x0330
> + #define TEST_MISO_COUNT_1	GENMASK(3, 0)
> + #define TEST_MISO_COUNT_2	GENMASK(7, 4)
> + #define TEST_MISO_DONE_1	BIT(28)
> + #define TEST_MISO_DONE_2	BIT(29)
> +
>   #define NAU8825_HS_PRESENT	BIT(0)
>   
>   /*
> @@ -251,9 +261,6 @@ static const struct snd_kcontrol_new mt8188_nau8825_controls[] = {
>   	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
>   };
>   
> -#define CKSYS_AUD_TOP_CFG 0x032c
> -#define CKSYS_AUD_TOP_MON 0x0330
> -
>   static int mt8188_mt6359_mtkaif_calibration(struct snd_soc_pcm_runtime *rtd)
>   {
>   	struct snd_soc_component *cmpnt_afe =
> @@ -265,13 +272,13 @@ static int mt8188_mt6359_mtkaif_calibration(struct snd_soc_pcm_runtime *rtd)
>   	struct mtkaif_param *param;
>   	int chosen_phase_1, chosen_phase_2;
>   	int prev_cycle_1, prev_cycle_2;
> -	int test_done_1, test_done_2;
> +	u8 test_done_1, test_done_2;
>   	int cycle_1, cycle_2;

Shouldn't be unsigned too ?

I'm wondering if it would be better (probably in another patch) to 
change the data type of the other variables too, to match their 
use-case. (maybe it's already the case, I'm just wondering)

>   	int mtkaif_chosen_phase[MT8188_MTKAIF_MISO_NUM];
>   	int mtkaif_phase_cycle[MT8188_MTKAIF_MISO_NUM];
>   	int mtkaif_calibration_num_phase;
>   	bool mtkaif_calibration_ok;
> -	unsigned int monitor = 0;
> +	u32 monitor = 0;
>   	int counter;
>   	int phase;
>   	int i;
> @@ -303,8 +310,7 @@ static int mt8188_mt6359_mtkaif_calibration(struct snd_soc_pcm_runtime *rtd)
>   	mt6359_mtkaif_calibration_enable(cmpnt_codec);
>   
>   	/* set test type to synchronizer pulse */
> -	regmap_update_bits(afe_priv->topckgen,
> -			   CKSYS_AUD_TOP_CFG, 0xffff, 0x4);
> +	regmap_write(afe_priv->topckgen, CKSYS_AUD_TOP_CFG, RG_TEST_TYPE);
>   	mtkaif_calibration_num_phase = 42;	/* mt6359: 0 ~ 42 */
>   	mtkaif_calibration_ok = true;
>   
> @@ -314,7 +320,7 @@ static int mt8188_mt6359_mtkaif_calibration(struct snd_soc_pcm_runtime *rtd)
>   		mt6359_set_mtkaif_calibration_phase(cmpnt_codec,
>   						    phase, phase, phase);
>   
> -		regmap_set_bits(afe_priv->topckgen, CKSYS_AUD_TOP_CFG, 0x1);
> +		regmap_set_bits(afe_priv->topckgen, CKSYS_AUD_TOP_CFG, RG_TEST_ON);
>   
>   		test_done_1 = 0;
>   		test_done_2 = 0;
> @@ -326,14 +332,14 @@ static int mt8188_mt6359_mtkaif_calibration(struct snd_soc_pcm_runtime *rtd)
>   		while (!(test_done_1 & test_done_2)) {
>   			regmap_read(afe_priv->topckgen,
>   				    CKSYS_AUD_TOP_MON, &monitor);
> -			test_done_1 = (monitor >> 28) & 0x1;
> -			test_done_2 = (monitor >> 29) & 0x1;
> +			test_done_1 = FIELD_GET(TEST_MISO_DONE_1, monitor);
> +			test_done_2 = FIELD_GET(TEST_MISO_DONE_2, monitor);
>   
>   			if (test_done_1 == 1)
> -				cycle_1 = monitor & 0xf;
> +				cycle_1 = FIELD_GET(TEST_MISO_COUNT_1, monitor);
>   
>   			if (test_done_2 == 1)
> -				cycle_2 = (monitor >> 4) & 0xf;
> +				cycle_2 = FIELD_GET(TEST_MISO_COUNT_2, monitor);
>   
>   			/* handle if never test done */
>   			if (++counter > 10000) {
> @@ -361,7 +367,7 @@ static int mt8188_mt6359_mtkaif_calibration(struct snd_soc_pcm_runtime *rtd)
>   			mtkaif_phase_cycle[MT8188_MTKAIF_MISO_1] = prev_cycle_2;
>   		}
>   
> -		regmap_clear_bits(afe_priv->topckgen, CKSYS_AUD_TOP_CFG, 0x1);
> +		regmap_clear_bits(afe_priv->topckgen, CKSYS_AUD_TOP_CFG, RG_TEST_ON);
>   
>   		if (mtkaif_chosen_phase[MT8188_MTKAIF_MISO_0] >= 0 &&
>   		    mtkaif_chosen_phase[MT8188_MTKAIF_MISO_1] >= 0)

After that:

Reviewed-by: Alexandre Mergnat <amergnat@...libre.com>

-- 
Regards,
Alexandre