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From: Ville Syrjala <ville.syrjala@linux.intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: intel-xe@lists.freedesktop.org
Subject: [PATCH 11/11] drm/i915/bw: Simplify the best max_data_rate search
Date: Thu, 28 May 2026 13:34:58 +0300	[thread overview]
Message-ID: <20260528103458.18069-12-ville.syrjala@linux.intel.com> (raw)
In-Reply-To: <20260528103458.18069-1-ville.syrjala@linux.intel.com>

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

For some reason we're tracking the best max_data_rate
as the difference between the required data_rate and
max_data_rate. That's pointlessly complicated as we're
just looking for the minimum max_data_rate that is
greater or equal to data_rate.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_bw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index 423cae2ff208..41539fdfeac5 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -1112,8 +1112,8 @@ static int mtl_find_qgv_points(struct intel_display *display,
 		if (max_data_rate < data_rate)
 			continue;
 
-		if (max_data_rate - data_rate < best_rate) {
-			best_rate = max_data_rate - data_rate;
+		if (max_data_rate < best_rate) {
+			best_rate = max_data_rate;
 			qgv_peak_bw = display->bw.peakbw[i];
 		}
 
-- 
2.53.0


  parent reply	other threads:[~2026-05-28 10:35 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-28 10:34 [PATCH 00/11] drm/i915/bw: Cleanups Ville Syrjala
2026-05-28 10:34 ` [PATCH 01/11] drm/i915/bw: Don't memcpy() pointlessly Ville Syrjala
2026-06-01 20:54   ` Govindapillai, Vinod
2026-05-28 10:34 ` [PATCH 02/11] drm/i915/bw: Streamline dg2_get_bw_info() Ville Syrjala
2026-06-01 21:02   ` Govindapillai, Vinod
2026-05-28 10:34 ` [PATCH 03/11] drm/i915/bw: Initialize num_planes sensibly for the first plane group in TGL+ Ville Syrjala
2026-06-04 14:46   ` Govindapillai, Vinod
2026-05-28 10:34 ` [PATCH 04/11] drm/i915/bw: Move 'bi_next' to tighter scope Ville Syrjala
2026-06-04 14:48   ` Govindapillai, Vinod
2026-05-28 10:34 ` [PATCH 05/11] drn/i915/bw: s/num_points/num_qgv_points/ Ville Syrjala
2026-06-04 14:49   ` Govindapillai, Vinod
2026-05-28 10:34 ` [PATCH 06/11] drm/i915/bw: Move num_{qgv, psf}_points out from the plane group Ville Syrjala
2026-06-04 14:53   ` Govindapillai, Vinod
2026-05-28 10:34 ` [PATCH 07/11] drm/i915/bw: Move psf_bw[] " Ville Syrjala
2026-06-04 14:55   ` Govindapillai, Vinod
2026-05-28 10:34 ` [PATCH 08/11] drm/i915/bw: Move peakbw[] " Ville Syrjala
2026-06-04 14:57   ` Govindapillai, Vinod
2026-05-28 10:34 ` [PATCH 09/11] drm/i915/bw: Print derated bandwidth numbers for DG2 Ville Syrjala
2026-06-04 14:58   ` Govindapillai, Vinod
2026-05-28 10:34 ` [PATCH 10/11] drm/i915/bw: Use icl_qgv_bw() Ville Syrjala
2026-06-04 14:59   ` Govindapillai, Vinod
2026-06-04 15:12     ` Ville Syrjälä
2026-06-04 15:22       ` Govindapillai, Vinod
2026-06-04 15:31         ` Ville Syrjälä
2026-06-04 15:40           ` Govindapillai, Vinod
2026-05-28 10:34 ` Ville Syrjala [this message]
2026-06-04 16:14   ` [PATCH 11/11] drm/i915/bw: Simplify the best max_data_rate search Govindapillai, Vinod
2026-05-28 11:58 ` ✓ i915.CI.BAT: success for drm/i915/bw: Cleanups Patchwork
2026-05-28 18:10 ` ✗ i915.CI.Full: failure " Patchwork

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