linux-kernel - [PATCH] drm/amd/display: Fix a test CalculatePrefetchSchedule()

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Date:   Mon, 17 Apr 2023 23:35:08 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Pavle Kotarac <Pavle.Kotarac@....com>,
        Nevenko Stupar <Nevenko.Stupar@....com>,
        Aric Cyr <aric.cyr@....com>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH] drm/amd/display: Fix a test CalculatePrefetchSchedule()

It is likely Height was expected here, instead of Width.

Test the correct variable.

Fixes: 17529ea2acfa ("drm/amd/display: Optimizations for DML math")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c b/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c
index b7c2844d0cbe..f294f2f8c75b 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_mode_vba_21.c
@@ -810,7 +810,7 @@ static bool CalculatePrefetchSchedule(
 			*swath_width_chroma_ub = dml_ceil(SwathWidthY / 2 - 1, myPipe->BlockWidth256BytesC) + myPipe->BlockWidth256BytesC;
 	} else {
 		*swath_width_luma_ub = dml_ceil(SwathWidthY - 1, myPipe->BlockHeight256BytesY) + myPipe->BlockHeight256BytesY;
-		if (myPipe->BlockWidth256BytesC > 0)
+		if (myPipe->BlockHeight256BytesC > 0)
 			*swath_width_chroma_ub = dml_ceil(SwathWidthY / 2 - 1, myPipe->BlockHeight256BytesC) + myPipe->BlockHeight256BytesC;
 	}
 
-- 
2.34.1