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drm/i915: modify max_bw to return index to intel_bw_info

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MTL uses the peak BW of a QGV point to lock the required QGV
point instead of the QGV index. Instead of passing the deratedbw
of the selected bw_info, return the index to the selected
bw_info so that either deratedbw or peakbw can be used based on
the platform.

v2: use idx to store index returned by max_bw_index functions

v3: return UINT_MAX in icl_max_bw_index in case no match found

v3: check idx >= ARRAY_SIZE

Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230606093509.221709-6-vinod.govindapillai@intel.com
This commit is contained in:
Vinod Govindapillai 2023-06-06 12:35:07 +03:00 committed by Radhakrishna Sripada
parent 463cc9402e
commit 6400c215a1
1 changed files with 17 additions and 10 deletions
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27
drivers/gpu/drm/i915/display/intel_bw.c
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@ -593,8 +593,8 @@ static void dg2_get_bw_info(struct drm_i915_private *i915)
i915->display.sagv.status = I915_SAGV_NOT_CONTROLLED;
}
static unsigned int icl_max_bw(struct drm_i915_private *dev_priv,
int num_planes, int qgv_point)
static unsigned int icl_max_bw_index(struct drm_i915_private *dev_priv,
int num_planes, int qgv_point)
{
int i;
@ -615,14 +615,14 @@ static unsigned int icl_max_bw(struct drm_i915_private *dev_priv,
return UINT_MAX;
if (num_planes >= bi->num_planes)
return bi->deratedbw[qgv_point];
return i;
}
return 0;
return UINT_MAX;
}
static unsigned int tgl_max_bw(struct drm_i915_private *dev_priv,
int num_planes, int qgv_point)
static unsigned int tgl_max_bw_index(struct drm_i915_private *dev_priv,
int num_planes, int qgv_point)
{
int i;
@ -643,10 +643,10 @@ static unsigned int tgl_max_bw(struct drm_i915_private *dev_priv,
return UINT_MAX;
if (num_planes <= bi->num_planes)
return bi->deratedbw[qgv_point];
return i;
}
return dev_priv->display.bw.max[0].deratedbw[qgv_point];
return 0;
}
static unsigned int adl_psf_bw(struct drm_i915_private *dev_priv,
@ -823,12 +823,19 @@ static int icl_find_qgv_points(struct drm_i915_private *i915,
return ret;
for (i = 0; i < num_qgv_points; i++) {
unsigned int idx;
unsigned int max_data_rate;
if (DISPLAY_VER(i915) > 11)
max_data_rate = tgl_max_bw(i915, num_active_planes, i);
idx = tgl_max_bw_index(i915, num_active_planes, i);
else
max_data_rate = icl_max_bw(i915, num_active_planes, i);
idx = icl_max_bw_index(i915, num_active_planes, i);
if (idx >= ARRAY_SIZE(i915->display.bw.max))
continue;
max_data_rate = i915->display.bw.max[idx].deratedbw[i];
/*
* We need to know which qgv point gives us
* maximum bandwidth in order to disable SAGV