Re: [PATCH 01/22] drm/i915: Shrink cxsr_latency_table

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Wed, Oct 05, 2016 at 01:33:28PM +0100, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
> 
> unsigned long is too wide - use smaller types in
> struct cxsr_latency to save 800-something bytes of .rodata.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_drv.h | 16 ++++++++--------
>  drivers/gpu/drm/i915/intel_pm.c  |  4 ++--
>  2 files changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index f48e79ae2ac6..c52b1d3a7ba0 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -807,14 +807,14 @@ struct intel_watermark_params {
>  };
>  
>  struct cxsr_latency {
> -	int is_desktop;
> -	int is_ddr3;
> -	unsigned long fsb_freq;
> -	unsigned long mem_freq;
> -	unsigned long display_sr;
> -	unsigned long display_hpll_disable;
> -	unsigned long cursor_sr;
> -	unsigned long cursor_hpll_disable;
> +	bool is_desktop : 1;
> +	bool is_ddr3 : 1;
> +	unsigned int fsb_freq;
> +	unsigned int mem_freq;
> +	unsigned int display_sr;
> +	unsigned int display_hpll_disable;
> +	unsigned int cursor_sr;
> +	unsigned int cursor_hpll_disable;

Am I blind or would all of the values fit even in u16?

>  };
>  
>  #define to_intel_atomic_state(x) container_of(x, struct intel_atomic_state, base)
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 7f1748a1e614..3b1f0b40ccb9 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -252,8 +252,8 @@ static const struct cxsr_latency cxsr_latency_table[] = {
>  	{0, 1, 400, 800, 6042, 36042, 6584, 36584},    /* DDR3-800 SC */
>  };
>  
> -static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
> -							 int is_ddr3,
> +static const struct cxsr_latency *intel_get_cxsr_latency(bool is_desktop,
> +							 bool is_ddr3,
>  							 int fsb,
>  							 int mem)
>  {
> -- 
> 2.7.4
> 
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-- 
Ville Syrjälä
Intel OTC
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