[igt-dev] [PATCH i-g-t 1/2] igt/i915/i915_pm_dc: DC3CO PSR2 helpers

[Arkadiusz Hiler]

On Thu, Oct 17, 2019 at 04:04:59PM +0530, Jeevan B wrote:
> ontent-Length: 2643
> 
> From: Anshuman Gupta <anshuman.gupta at intel.com>
> 
> Add DC3CO IGT validation prerequisites stuff
> so we can enable DC3CO IGT test.
> 
> v2: Removed psr2_idle_wait_entry and get_psr2_status function.
> 
> v3: Changed macro definition and removed extra line.
> 
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
> Signed-off-by: Jeevan B <jeevan.b at intel.com>
> ---
>  tests/i915/i915_pm_dc.c | 37 ++++++++++++++++++++++++++++++-------
>  1 file changed, 30 insertions(+), 7 deletions(-)
> 
> diff --git a/tests/i915/i915_pm_dc.c b/tests/i915/i915_pm_dc.c
> index ce3319b..0ddd6b3 100644
> --- a/tests/i915/i915_pm_dc.c
> +++ b/tests/i915/i915_pm_dc.c
> @@ -34,8 +34,9 @@
>  #include "limits.h"
>  
>  /* DC State Flags */
> -#define CHECK_DC5	1
> -#define CHECK_DC6	2
> +#define CHECK_DC5	(1 << 0)
> +#define CHECK_DC6	(1 << 1)
> +#define CHECK_DC3CO	(1 << 2)
>  
>  typedef struct {
>  	int drm_fd;
> @@ -88,6 +89,19 @@ static bool edp_psr_sink_support(data_t *data)
>  	return strstr(buf, "Sink support: yes");
>  }
>  
> +static bool edp_psr2_enabled(data_t *data)
> +{
> +	char buf[512];
> +
> +	igt_debugfs_simple_read(data->debugfs_fd, "i915_edp_psr_status",
> +				buf, sizeof(buf));
> +
> +	if (data->op_psr_mode == PSR_MODE_2)
> +		return strstr(buf, "PSR mode: PSR2 enabled");

This looks like a helper function to check whether we have PSR2 enabled,
so I don't quite get why we have this if here.

It's either enabled or not and some internal state of data struct should
not affect it.

> +
> +	return false;
> +}
> +
>  static void cleanup_dc_psr(data_t *data)
>  {
>  	igt_plane_t *primary;
> @@ -141,12 +155,18 @@ static uint32_t read_dc_counter(uint32_t drm_fd, int dc_flag)
>  		str = strstr(buf, "DC3 -> DC5 count");
>  	else if (dc_flag & CHECK_DC6)
>  		str = strstr(buf, "DC5 -> DC6 count");
> +	else if (dc_flag & CHECK_DC3CO)
> +		str = strstr(buf, "DC3CO count");
>  
> -	/* Check DC5/DC6 counter is available for the platform.
> +	/* Check DC counter is available for the platform.
>  	 * Skip the test if counter is not available.
>  	 */
> -	igt_skip_on_f(!str, "DC%d counter is not available\n",
> -		      dc_flag & CHECK_DC5 ? 5 : 6);
> +	if (dc_flag & CHECK_DC3CO)
> +		igt_skip_on_f(!str, "DC3CO counter is not available\n");
> +	else
> +		igt_skip_on_f(!str, "DC%d counter is not available\n",
> +			      dc_flag & CHECK_DC5 ? 5 : 6);
> +
>  	return get_dc_counter(str);
>  }
>  
> @@ -158,9 +178,12 @@ static bool dc_state_wait_entry(int drm_fd, int dc_flag, int prev_dc_count)
>  
>  static void check_dc_counter(int drm_fd, int dc_flag, uint32_t prev_dc_count)
>  {
> +	char tmp[64];
> +
> +	snprintf(tmp, sizeof(tmp), "%s", dc_flag & CHECK_DC3CO ? "DC3CO" :
> +		 (dc_flag & CHECK_DC5 ? "DC5" : "DC6"));
>  	igt_assert_f(dc_state_wait_entry(drm_fd, dc_flag, prev_dc_count),
> -		     "DC%d state is not achieved\n",
> -		     dc_flag & CHECK_DC5 ? 5 : 6);
> +		     "%s state is not achieved\n", tmp);
>  }
>  
>  static void test_dc_state_psr(data_t *data, int