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drm/i915/bw: Fix DEPROGBWPCLIMIT handling on BMG

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DEPROGBWPCLIMIT is specified in %, so divide by 100 instead of 10.

Fortunately the deprobbwlimit is much lower than the peak memory
bandwidth on BMG, so whether we take 60% or 600% of the peak
bandwidth doesn't matter as the min() will pick the lower
deprobbwlimit anyway.

Eg. on the BMG here I get (with or without the fix):
 QGV 0: deratedbw=33600 peakbw=48000
 QGV 1: deratedbw=53000 peakbw=456000

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260522200346.17377-7-ville.syrjala@linux.intel.com
Reviewed-by: Michał Grzelak <michal.grzelak@intel.com>
This commit is contained in:
Ville Syrjälä 2026-05-22 23:03:42 +03:00
parent ee0421aad3
commit 7ceffa346e
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/display/intel_bw.c
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@ -738,7 +738,7 @@ static int xe2_hpd_get_bw_info(struct intel_display *display,
}
peakbw = num_channels * qi.channel_width / 8 * icl_sagv_max_dclk(&qi);
maxdebw = min(soc_bw_params->deprogbwlimit * 1000, peakbw * DEPROGBWPCLIMIT / 10);
maxdebw = min(soc_bw_params->deprogbwlimit * 1000, peakbw * DEPROGBWPCLIMIT / 100);
for (i = 0; i < qi.num_points; i++) {
const struct intel_qgv_point *point = &qi.points[i];