[Intel-gfx] [RFC 3/7] drm/i915/dp: Preparation for DP phy compliance auto test

[Manasi Navare]

On Fri, Nov 15, 2019 at 08:55:45PM +0530, Animesh Manna wrote:
> During DP phy compliance auto test mode, sink will request
> combination of different test pattern with differnt level of
> vswing, pre-emphasis. Function added to prepare for it.
> 
> Signed-off-by: Animesh Manna <animesh.manna at intel.com>

This looks good to me,

Reviewed-by: Manasi Navare <manasi.d.navare at intel.com>

Manasi

> ---
>  .../drm/i915/display/intel_display_types.h    |  1 +
>  drivers/gpu/drm/i915/display/intel_dp.c       | 24 +++++++++++++++++++
>  2 files changed, 25 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 83ea04149b77..c17866f126c9 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1205,6 +1205,7 @@ struct intel_dp_compliance_data {
>  	u8 video_pattern;
>  	u16 hdisplay, vdisplay;
>  	u8 bpc;
> +	struct drm_dp_phy_test_params phytest;
>  };
>  
>  struct intel_dp_compliance {
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index cc8e0d1a73af..338d3744c5d5 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -4936,9 +4936,33 @@ static u8 intel_dp_autotest_edid(struct intel_dp *intel_dp)
>  	return test_result;
>  }
>  
> +static u8 intel_dp_prepare_phytest(struct intel_dp *intel_dp)
> +{
> +	struct drm_dp_phy_test_params *data =
> +		&intel_dp->compliance.test_data.phytest;
> +
> +	if (!drm_dp_get_phy_test_pattern(&intel_dp->aux, data)) {
> +		DRM_DEBUG_KMS("DP Phy Test pattern AUX read failure\n");
> +		return DP_TEST_NAK;
> +	}
> +
> +	/*
> +	 * link_mst is set to false to avoid executing mst related code
> +	 * during compliance testing.
> +	 */
> +	intel_dp->link_mst = false;
> +
> +	return DP_TEST_ACK;
> +}
> +
>  static u8 intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
>  {
>  	u8 test_result = DP_TEST_NAK;
> +
> +	test_result = intel_dp_prepare_phytest(intel_dp);
> +	if (test_result != DP_TEST_ACK)
> +		DRM_ERROR("Phy test preparation failed\n");
> +
>  	return test_result;
>  }
>  
> -- 
> 2.22.0
>