[Intel-gfx] [PATCH v3 08/12] drm/i915/dp: Convert link training error to debug message on disconnected sink

[Govindapillai, Vinod]

On Fri, 2023-05-05 at 23:46 +0300, Imre Deak wrote:
> If a sink is disconnected it's expected that link training actions will
> fail on it, so downgrade the error messages about such actions to be a
> debug message. Such - expected - link training failures are more
> frequent after a follow up patch, after which an active TypeC link is
> reset after the sink is disconnected which also involves a link
> training.
> 
> v2:
> - Check the actual HPD state to handle the forced connector state case.
>   (Vinod)
> 
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Cc: Vinod Govindapillai <vinod.govindapillai at intel.com>
> Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com> (v1)
> Signed-off-by: Imre Deak <imre.deak at intel.com>
> ---

Thanks. Looks good.

Reviewed-by: Vinod Govindapillai <vinod.govindapillai at intel.com>

>  .../gpu/drm/i915/display/intel_dp_link_training.c    | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
> b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
> index 4f33b79b23db0..51d1e4b4b2f19 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
> @@ -38,10 +38,14 @@
>                     LT_MSG_PREFIX _format, \
>                     LT_MSG_ARGS(_intel_dp, _dp_phy), ## __VA_ARGS__)
>  
> -#define lt_err(_intel_dp, _dp_phy, _format, ...) \
> -       drm_err(&dp_to_i915(_intel_dp)->drm, \
> -               LT_MSG_PREFIX _format, \
> -               LT_MSG_ARGS(_intel_dp, _dp_phy), ## __VA_ARGS__)
> +#define lt_err(_intel_dp, _dp_phy, _format, ...) do { \
> +       if (intel_digital_port_connected(&dp_to_dig_port(_intel_dp)->base)) \
> +               drm_err(&dp_to_i915(_intel_dp)->drm, \
> +                       LT_MSG_PREFIX _format, \
> +                       LT_MSG_ARGS(_intel_dp, _dp_phy), ## __VA_ARGS__); \
> +       else \
> +               lt_dbg(_intel_dp, _dp_phy, "Sink disconnected: " _format, ## __VA_ARGS__); \
> +} while (0)
>  
>  static void intel_dp_reset_lttpr_common_caps(struct intel_dp *intel_dp)
>  {