[Intel-gfx] [PATCH 3/3] drm/i915: add i915.dp_link_train_policy option

[Barbalho, Rafael]

<snip>
 
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h    |  1 +
>  drivers/gpu/drm/i915/i915_params.c |  8 ++++++++
>  drivers/gpu/drm/i915/intel_dp.c    | 39
> ++++++++++++++++++++++++++++++++++----
>  3 files changed, 44 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h
> b/drivers/gpu/drm/i915/i915_drv.h index 7d6acb4..d5ae8dc 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1941,6 +1941,7 @@ struct i915_params {
>  	bool reset;
>  	bool disable_display;
>  	bool disable_vtd_wa;
> +	int dp_link_train_policy;
>  };
>  extern struct i915_params i915 __read_mostly;
> 
> diff --git a/drivers/gpu/drm/i915/i915_params.c
> b/drivers/gpu/drm/i915/i915_params.c
> index d05a2af..8c358e7 100644
> --- a/drivers/gpu/drm/i915/i915_params.c
> +++ b/drivers/gpu/drm/i915/i915_params.c
> @@ -48,6 +48,7 @@ struct i915_params i915 __read_mostly = {
>  	.disable_display = 0,
>  	.enable_cmd_parser = 1,
>  	.disable_vtd_wa = 0,
> +	.dp_link_train_policy = 0,
>  };
> 
>  module_param_named(modeset, i915.modeset, int, 0400); @@ -156,3
> +157,10 @@ MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d
> workarounds (default: false)"
>  module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int,
> 0600);  MODULE_PARM_DESC(enable_cmd_parser,
>  		 "Enable command parsing (1=enabled [default],
> 0=disabled)");
> +
> +module_param_named(dp_link_train_policy, i915.dp_link_train_policy,
> +int, 0600); MODULE_PARM_DESC(dp_link_train_policy,
> +	"Choose strategy for DP link training "
> +	"(0=narrow and fast [default], 1=wide and slow. For other values, "
> +	"bits 11:8 are for the BW and bits 7:4 are for the nubmer of lanes, "
> +	"check intel_dp_compute_link_config() for more details.)");

There is a typo here, nubmer should be number, otherwise:

Reviewed-by: Rafael Barbalho <rafael.barbalho at intel.com>