On Fri, 02 Jun 2017, Manasi Navare <manasi.d.navare@xxxxxxxxx> wrote:
> This function now takes the link rate and lane ocunt to be validated
> as an argument so that this can be used for validating even the
> compliance test link parameters.
>
> Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
> Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_dp.c | 14 ++++++++------
> 1 file changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 58dca87..832786d 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -322,19 +322,20 @@ static int intel_dp_common_len_rate_limit(struct intel_dp *intel_dp,
> return 0;
> }
>
> -static bool intel_dp_link_params_valid(struct intel_dp *intel_dp)
> +static bool intel_dp_link_params_valid(struct intel_dp *intel_dp, int link_rate,
> + uint8_t lane_count)
> {
> /*
> * FIXME: we need to synchronize the current link parameters with
> * hardware readout. Currently fast link training doesn't work on
> * boot-up.
> */
> - if (intel_dp->link_rate == 0 ||
> - intel_dp->link_rate > intel_dp->max_link_rate)
> + if (link_rate == 0 ||
> + link_rate > intel_dp->max_link_rate)
> return false;
>
> - if (intel_dp->lane_count == 0 ||
> - intel_dp->lane_count > intel_dp_max_lane_count(intel_dp))
> + if (lane_count == 0 ||
> + lane_count > intel_dp_max_lane_count(intel_dp))
> return false;
>
> return true;
> @@ -4260,7 +4261,8 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
> * Validate the cached values of intel_dp->link_rate and
> * intel_dp->lane_count before attempting to retrain.
> */
> - if (!intel_dp_link_params_valid(intel_dp))
> + if (!intel_dp_link_params_valid(intel_dp, intel_dp->link_rate,
> + intel_dp->lane_count))
> return;
>
> /* Retrain if Channel EQ or CR not ok */
--
Jani Nikula, Intel Open Source Technology Center
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