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drm/i915/icl: track dbuf slice-2 status

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This patch adds support to start tracking status of DBUF slices.
This is foundation to introduce support for enabling/disabling second
DBUF slice dynamically for ICL.

Changes Since V1:
 - use kernel type u8 over uint8_t

Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Reviewed-by: James Ausmus <james.ausmus@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180426142517.16643-2-mahesh1.kumar@intel.com
This commit is contained in:
Mahesh Kumar
2018-04-26 19:55:15 +05:30
committed by Rodrigo Vivi
parent 077ef1f09c
commit 74bd8004e4
4 changed files with 30 additions and 0 deletions
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20
drivers/gpu/drm/i915/intel_pm.c
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@@ -3567,6 +3567,23 @@ bool ilk_disable_lp_wm(struct drm_device *dev)
return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL);
}
static u8 intel_enabled_dbuf_slices_num(struct drm_i915_private *dev_priv)
{
u8 enabled_slices;
/* Slice 1 will always be enabled */
enabled_slices = 1;
/* Gen prior to GEN11 have only one DBuf slice */
if (INTEL_GEN(dev_priv) < 11)
return enabled_slices;
if (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE)
enabled_slices++;
return enabled_slices;
}
/*
* FIXME: We still don't have the proper code detect if we need to apply the WA,
* so assume we'll always need it in order to avoid underruns.
@@ -3870,6 +3887,8 @@ void skl_ddb_get_hw_state(struct drm_i915_private *dev_priv,
memset(ddb, 0, sizeof(*ddb));
ddb->enabled_slices = intel_enabled_dbuf_slices_num(dev_priv);
for_each_intel_crtc(&dev_priv->drm, crtc) {
enum intel_display_power_domain power_domain;
enum plane_id plane_id;
@@ -5088,6 +5107,7 @@ skl_copy_ddb_for_pipe(struct skl_ddb_values *dst,
sizeof(dst->ddb.uv_plane[pipe]));
memcpy(dst->ddb.plane[pipe], src->ddb.plane[pipe],
sizeof(dst->ddb.plane[pipe]));
dst->ddb.enabled_slices = src->ddb.enabled_slices;
}
static void