linux-kernel - Re: [PATCH] bus: ti-sysc: Add module enable quirk for audio AESS

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Date:   Thu, 14 Nov 2019 12:25:08 +0200
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     Tony Lindgren <tony@...mide.com>, <linux-omap@...r.kernel.org>
CC:     "Andrew F . Davis" <afd@...com>, Dave Gerlach <d-gerlach@...com>,
        Faiz Abbas <faiz_abbas@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Keerthy <j-keerthy@...com>, Nishanth Menon <nm@...com>,
        Roger Quadros <rogerq@...com>, Suman Anna <s-anna@...com>,
        Tero Kristo <t-kristo@...com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] bus: ti-sysc: Add module enable quirk for audio AESS



On 13/11/2019 19.37, Tony Lindgren wrote:
> We must set the autogating bit on enable for AESS (Audio Engine SubSystem)
> when probed with ti-sysc interconnect target module driver. Otherwise it
> won't idle properly.
> 
> Cc: Peter Ujfalusi <peter.ujfalusi@...com>
> Signed-off-by: Tony Lindgren <tony@...mide.com>
> ---
>  drivers/bus/ti-sysc.c                 | 14 +++++++++++++-
>  include/linux/platform_data/ti-sysc.h |  1 +
>  2 files changed, 14 insertions(+), 1 deletion(-)

Tested-by: Peter Ujfalusi <peter.ujfalusi@...com>

> diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
> --- a/drivers/bus/ti-sysc.c
> +++ b/drivers/bus/ti-sysc.c
> @@ -1248,6 +1248,8 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
>  		   SYSC_QUIRK_SWSUP_SIDLE),
>  
>  	/* Quirks that need to be set based on detected module */
> +	SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff,
> +		   SYSC_MODULE_QUIRK_AESS),
>  	SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff,
>  		   SYSC_MODULE_QUIRK_HDQ1W),
>  	SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x0000000a, 0xffffffff,
> @@ -1276,7 +1278,6 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
>  #ifdef DEBUG
>  	SYSC_QUIRK("adc", 0, 0, 0x10, -1, 0x47300001, 0xffffffff, 0),
>  	SYSC_QUIRK("atl", 0, 0, -1, -1, 0x0a070100, 0xffffffff, 0),
> -	SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff, 0),
>  	SYSC_QUIRK("cm", 0, 0, -1, -1, 0x40000301, 0xffffffff, 0),
>  	SYSC_QUIRK("control", 0, 0, 0x10, -1, 0x40000900, 0xffffffff, 0),
>  	SYSC_QUIRK("cpgmac", 0, 0x1200, 0x1208, 0x1204, 0x4edb1902,
> @@ -1408,6 +1409,14 @@ static void sysc_clk_enable_quirk_hdq1w(struct sysc *ddata)
>  	sysc_write(ddata, offset, val);
>  }
>  
> +/* AESS (Audio Engine SubSystem) needs autogating set after enable */
> +static void sysc_module_enable_quirk_aess(struct sysc *ddata)
> +{
> +	int offset = 0x7c;	/* AESS_AUTO_GATING_ENABLE */
> +
> +	sysc_write(ddata, offset, 1);
> +}
> +
>  /* I2C needs extra enable bit toggling for reset */
>  static void sysc_clk_quirk_i2c(struct sysc *ddata, bool enable)
>  {
> @@ -1490,6 +1499,9 @@ static void sysc_init_module_quirks(struct sysc *ddata)
>  		return;
>  	}
>  
> +	if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_AESS)
> +		ddata->module_enable_quirk = sysc_module_enable_quirk_aess;
> +
>  	if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_SGX)
>  		ddata->module_enable_quirk = sysc_module_enable_quirk_sgx;
>  
> diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h
> --- a/include/linux/platform_data/ti-sysc.h
> +++ b/include/linux/platform_data/ti-sysc.h
> @@ -49,6 +49,7 @@ struct sysc_regbits {
>  	s8 emufree_shift;
>  };
>  
> +#define SYSC_MODULE_QUIRK_AESS		BIT(19)
>  #define SYSC_MODULE_QUIRK_SGX		BIT(18)
>  #define SYSC_MODULE_QUIRK_HDQ1W		BIT(17)
>  #define SYSC_MODULE_QUIRK_I2C		BIT(16)
> 

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