Re: [PATCH 8/8] OMAP3: powerdomain data: add wake-up latency figures

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Hi Jean

On Wed, 21 Sep 2011, jean.pihet@xxxxxxxxxxxxxx wrote:

> Figures are added to the power domains structs for RET and OFF modes.
> 
> Note: the latency figures for MPU, PER, CORE, NEON have been obtained
> from actual measurements.
> The latency figures for the other power domains are preliminary and
> shall be added.
> 
> Cf. http://www.omappedia.org/wiki/Power_Management_Device_Latencies_Measurement
> for a detailed explanation on where are the numbers magically coming from.
> 
> Tested on OMAP3 Beagleboard in RET/OFF using wake-up latency constraints
> on MPU, CORE and PER.

A few more question about these numbers.

- Are these numbers the ones right off the hardware, or rounded, or 
worst-case plus a certain percentage?

- What frequency/voltage were these measured at?

- Also, you mention OMAP3 Beagleboard.  Is that 34xx or 36xx Beagleboard?

> Signed-off-by: Jean Pihet <j-pihet@xxxxxx>
> ---
>  arch/arm/mach-omap2/powerdomains3xxx_data.c |   78 +++++++++++++++++++++++++++
>  1 files changed, 78 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/powerdomains3xxx_data.c b/arch/arm/mach-omap2/powerdomains3xxx_data.c
> index 469a920..32922bb 100644
> --- a/arch/arm/mach-omap2/powerdomains3xxx_data.c
> +++ b/arch/arm/mach-omap2/powerdomains3xxx_data.c
> @@ -31,6 +31,14 @@
>  
>  /*
>   * Powerdomains
> + *
> + * The wakeup_lat values are derived from measurements on
> + * the actual target.
> + *
> + * Note: the latency figures for MPU, PER, CORE, NEON have been obtained
> + * from actual measurements.
> + * The latency figures for the other power domains are preliminary and
> + * shall be added.
>   */
>  
>  static struct powerdomain iva2_pwrdm = {
> @@ -52,6 +60,13 @@ static struct powerdomain iva2_pwrdm = {
>  		[2] = PWRSTS_OFF_ON,
>  		[3] = PWRSTS_ON,
>  	},
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 1100,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = 350,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  static struct powerdomain mpu_3xxx_pwrdm = {
> @@ -68,6 +83,13 @@ static struct powerdomain mpu_3xxx_pwrdm = {
>  	.pwrsts_mem_on	  = {
>  		[0] = PWRSTS_OFF_ON,
>  	},
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 1830,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = 121,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  /*
> @@ -98,6 +120,13 @@ static struct powerdomain core_3xxx_pre_es3_1_pwrdm = {
>  		[0] = PWRSTS_OFF_RET_ON, /* MEM1ONSTATE */
>  		[1] = PWRSTS_OFF_RET_ON, /* MEM2ONSTATE */
>  	},
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 3082,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = 153,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  static struct powerdomain core_3xxx_es3_1_pwrdm = {
> @@ -121,6 +150,13 @@ static struct powerdomain core_3xxx_es3_1_pwrdm = {
>  		[0] = PWRSTS_OFF_RET_ON, /* MEM1ONSTATE */
>  		[1] = PWRSTS_OFF_RET_ON, /* MEM2ONSTATE */
>  	},
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 3082,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = 153,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  static struct powerdomain dss_pwrdm = {
> @@ -136,6 +172,13 @@ static struct powerdomain dss_pwrdm = {
>  	.pwrsts_mem_on	  = {
>  		[0] = PWRSTS_ON,  /* MEMONSTATE */
>  	},
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 70,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = 20,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  /*
> @@ -157,6 +200,13 @@ static struct powerdomain sgx_pwrdm = {
>  	.pwrsts_mem_on	  = {
>  		[0] = PWRSTS_ON,  /* MEMONSTATE */
>  	},
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 1000,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  static struct powerdomain cam_pwrdm = {
> @@ -172,6 +222,13 @@ static struct powerdomain cam_pwrdm = {
>  	.pwrsts_mem_on	  = {
>  		[0] = PWRSTS_ON,  /* MEMONSTATE */
>  	},
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 850,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = 35,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  static struct powerdomain per_pwrdm = {
> @@ -187,6 +244,13 @@ static struct powerdomain per_pwrdm = {
>  	.pwrsts_mem_on	  = {
>  		[0] = PWRSTS_ON,  /* MEMONSTATE */
>  	},
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 671,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = 31,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  static struct powerdomain emu_pwrdm = {
> @@ -201,6 +265,13 @@ static struct powerdomain neon_pwrdm = {
>  	.omap_chip	  = OMAP_CHIP_INIT(CHIP_IS_OMAP3430),
>  	.pwrsts		  = PWRSTS_OFF_RET_ON,
>  	.pwrsts_logic_ret = PWRSTS_RET,
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 0,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = 0,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  static struct powerdomain usbhost_pwrdm = {
> @@ -223,6 +294,13 @@ static struct powerdomain usbhost_pwrdm = {
>  	.pwrsts_mem_on	  = {
>  		[0] = PWRSTS_ON,  /* MEMONSTATE */
>  	},
> +	.wakeup_lat = {
> +		[PWRDM_FUNC_PWRST_OFF] = 800,
> +		[PWRDM_FUNC_PWRST_OSWR] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_CSWR] = 150,
> +		[PWRDM_FUNC_PWRST_INACTIVE] = UNSUP_STATE,
> +		[PWRDM_FUNC_PWRST_ON] = 0,
> +	},
>  };
>  
>  static struct powerdomain dpll1_pwrdm = {
> -- 
> 1.7.4.1
> 
> --
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> 


- Paul
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