On Mon, May 04, 2020 at 03:52:11PM -0700, Matt Roper wrote:
> The RKL platform has different memory characteristics from past
> platforms. Update the values used by our memory bandwidth calculations
> accordingly.
>
> Bspec: 53998
> Cc: James Ausmus <james.ausmus@xxxxxxxxx>
> Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_bw.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
> index 6e7cc3a4f1aa..d435cc6019e4 100644
> --- a/drivers/gpu/drm/i915/display/intel_bw.c
> +++ b/drivers/gpu/drm/i915/display/intel_bw.c
> @@ -176,6 +176,12 @@ static const struct intel_sa_info tgl_sa_info = {
> .displayrtids = 256,
> };
>
> +static const struct intel_sa_info rkl_sa_info = {
> + .deburst = 16,
> + .deprogbwlimit = 20, /* GB/s */
> + .displayrtids = 128,
> +};
Numbers appear to match the spec.
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> +
> static int icl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel_sa_info *sa)
> {
> struct intel_qgv_info qi = {};
> @@ -271,7 +277,9 @@ void intel_bw_init_hw(struct drm_i915_private *dev_priv)
> if (!HAS_DISPLAY(dev_priv))
> return;
>
> - if (IS_GEN(dev_priv, 12))
> + if (IS_ROCKETLAKE(dev_priv))
> + icl_get_bw_info(dev_priv, &rkl_sa_info);
> + else if (IS_GEN(dev_priv, 12))
> icl_get_bw_info(dev_priv, &tgl_sa_info);
> else if (IS_GEN(dev_priv, 11))
> icl_get_bw_info(dev_priv, &icl_sa_info);
> --
> 2.24.1
>
> _______________________________________________
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> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
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--
Ville Syrjälä
Intel
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