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drm/i915/bw: Move peakbw[] out from the plane group

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The peak bandwidth doesn't depend on the number of planes,
so there is no need to repeat the same information for each
plane group.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260528103458.18069-9-ville.syrjala@linux.intel.com
Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
This commit is contained in:
Ville Syrjälä
2026-05-28 13:34:55 +03:00
parent 9037f07dfc
commit db7a45983f
2 changed files with 17 additions and 11 deletions
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24
drivers/gpu/drm/i915/display/intel_bw.c
View File

@@ -666,15 +666,21 @@ static int tgl_get_bw_info(struct intel_display *display,
bi->deratedbw[j] = min(maxdebw,
bw * (100 - soc_bw_params->derating) / 100);
bi->peakbw[j] = tgl_peakbw(num_channels, qi.channel_width, sp->dclk);
drm_dbg_kms(display->drm,
"BW%d / QGV %d: num_planes=%d deratedbw=%u peakbw: %u\n",
i, j, bi->num_planes, bi->deratedbw[j],
bi->peakbw[j]);
"BW%d / QGV %d: num_planes=%d deratedbw=%u\n",
i, j, bi->num_planes, bi->deratedbw[j]);
}
}
for (i = 0; i < qi.num_qgv_points; i++) {
const struct intel_qgv_point *sp = &qi.points[i];
display->bw.peakbw[i] = tgl_peakbw(num_channels, qi.channel_width, sp->dclk);
drm_dbg_kms(display->drm, "QGV %d: peakbw=%u\n", i, display->bw.peakbw[i]);
}
for (i = 0; i < qi.num_psf_points; i++) {
const struct intel_psf_gv_point *sp = &qi.psf_points[i];
@@ -741,11 +747,11 @@ static int xe2_hpd_get_bw_info(struct intel_display *display,
display->bw.max[0].deratedbw[i] =
min(maxdebw, (100 - soc_bw_params->derating) * bw / 100);
display->bw.max[0].peakbw[i] = bw;
drm_dbg_kms(display->drm, "QGV %d: deratedbw=%u peakbw: %u\n",
i, display->bw.max[0].deratedbw[i],
display->bw.max[0].peakbw[i]);
display->bw.peakbw[i] = bw;
drm_dbg_kms(display->drm, "QGV %d: deratedbw=%u peakbw=%u\n",
i, display->bw.max[0].deratedbw[i], display->bw.peakbw[i]);
}
/* Bandwidth does not depend on # of planes; set all groups the same */
@@ -1110,7 +1116,7 @@ static int mtl_find_qgv_points(struct intel_display *display,
if (max_data_rate - data_rate < best_rate) {
best_rate = max_data_rate - data_rate;
qgv_peak_bw = display->bw.max[bw_index].peakbw[i];
qgv_peak_bw = display->bw.peakbw[i];
}
drm_dbg_kms(display->drm, "QGV point %d: max bw %d required %d qgv_peak_bw: %d\n",

4
drivers/gpu/drm/i915/display/intel_display_core.h
View File

@@ -325,12 +325,12 @@ struct intel_display {
struct intel_bw_info {
/* for each QGV point */
unsigned int deratedbw[I915_NUM_QGV_POINTS];
/* Peak BW for each QGV point */
unsigned int peakbw[I915_NUM_QGV_POINTS];
u8 num_planes;
} max[6];
/* 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;
} bw;