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drm/i915: store the peak bw per QGV point

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In MTL onwards, pcode locks the GV point based on the peak BW
of a QGV point. So store the peak BW of all the QGV points.

v2: use DIV_ROUND_CLOSEST() for the peakBW calculation

Bspec: 64636

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/20230606093509.221709-4-vinod.govindapillai@intel.com
This commit is contained in:
Vinod Govindapillai
2023-06-06 12:35:05 +03:00
committed by Radhakrishna Sripada
parent 39bea0ff0f
commit 88d0ecbde9
2 changed files with 8 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/i915/display/intel_bw.c
View File

@@ -534,10 +534,14 @@ static int tgl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel
bi->deratedbw[j] = min(maxdebw,
bw * (100 - sa->derating) / 100);
bi->peakbw[j] = DIV_ROUND_CLOSEST(sp->dclk *
num_channels *
qi.channel_width, 8);
drm_dbg_kms(&dev_priv->drm,
"BW%d / QGV %d: num_planes=%d deratedbw=%u\n",
i, j, bi->num_planes, bi->deratedbw[j]);
"BW%d / QGV %d: num_planes=%d deratedbw=%u peakbw: %u\n",
i, j, bi->num_planes, bi->deratedbw[j],
bi->peakbw[j]);
}
for (j = 0; j < qi.num_psf_points; j++) {

2
drivers/gpu/drm/i915/display/intel_display_core.h
View File

@@ -314,6 +314,8 @@ struct intel_display {
unsigned int deratedbw[I915_NUM_QGV_POINTS];
/* for each PSF GV point */
unsigned int psf_bw[I915_NUM_PSF_GV_POINTS];
/* Peak BW for each QGV point */
unsigned int peakbw[I915_NUM_QGV_POINTS];
u8 num_qgv_points;
u8 num_psf_gv_points;
u8 num_planes;