drm/i915/rkl: Update memory bandwidth parameters

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@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200504225227.464666-7-matthew.d.roper@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index fef04e2..98bbe71 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -199,6 +199,12 @@ 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,
+};
+
 static int icl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel_sa_info *sa)
 {
        struct intel_qgv_info qi = {};
@@ -309,7 +315,9 @@ 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);