Re: [igt-dev] [PATCH i-g-t 1/2] tests/i915_pm_dc: Dump power_domain_info on DC test failures

["Souza, Jose" <jose.souza@intel.com>]

On Sun, 2020-02-16 at 23:30 +0530, Anshuman Gupta wrote:
> Dump i915_power_domain_info debugfs attribute on DC state
> test failures, it will help to identify culprit, which
> causes non zero refcount for "DC off" power well.
> 
> Cc: Animesh Manna <animesh.manna@intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
> ---
>  tests/i915/i915_pm_dc.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/tests/i915/i915_pm_dc.c b/tests/i915/i915_pm_dc.c
> index afcc10bc..4bca8559 100644
> --- a/tests/i915/i915_pm_dc.c
> +++ b/tests/i915/i915_pm_dc.c
> @@ -206,11 +206,13 @@ static bool dc_state_wait_entry(int debugfs_fd,
> int dc_flag, int prev_dc_count)
>  static void check_dc_counter(int debugfs_fd, int dc_flag, uint32_t
> prev_dc_count)
>  {
>  	char tmp[64];
> +	char file[64] = "i915_power_domain_info";
>  
>  	snprintf(tmp, sizeof(tmp), "%s", dc_flag & CHECK_DC3CO ?
> "DC3CO" :
>  		(dc_flag & CHECK_DC5 ? "DC5" : "DC6"));
>  	igt_assert_f(dc_state_wait_entry(debugfs_fd, dc_flag,
> prev_dc_count),
> -		     "%s state is not achieved\n", tmp);
> +		     "%s state is not achieved\n%s:\n%s\n",
> +		     tmp, file, igt_sysfs_get(debugfs_fd, file));
>  }

You are leaking the return of igt_sysfs_get() also why add the variable
file? 

>  
>  static void setup_videoplayback(data_t *data)
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