[Intel-gfx] [PATCH 1/2] tests/pm_rps: Round requested freq correctly

[Chris Wilson]

On Fri, Feb 07, 2014 at 10:03:33AM +0100, Daniel Vetter wrote:
> The kernel will round it, so if we don't we'll have a spurious
> mismatch. Happens on my machine here with 650-1300MHz range, where the
> midpoint is 975.
> 
> Cc: Jeff McGee <jeff.mcgee at intel.com>
> Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> ---
>  tests/pm_rps.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tests/pm_rps.c b/tests/pm_rps.c
> index 467038104ec6..27e758755e3f 100644
> --- a/tests/pm_rps.c
> +++ b/tests/pm_rps.c
> @@ -350,6 +350,9 @@ static void min_max_config(void (*check)(void))
>  {
>  	int fmid = (origfreqs[RPn] + origfreqs[RP0]) / 2;
>  
> +	/* hw (and so kernel) currently rounds to 50 MHz ... */

s/rounds/truncates/ or if it really does round, you need to adjust the
calculation.

> +	fmid = fmid / 50 * 50;
> +
>  	log("\nCheck original min and max...\n");
>  	check();
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre