linux-kernel - [PATCH 11/11] drm/msm/dpu: do not use mixer that supports dspp when not required

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Message-Id: <20230419-dpu-tweaks-v1-11-d1bac46db075@freebox.fr>
Date:   Wed, 19 Apr 2023 16:41:18 +0200
From:   Arnaud Vrac <avrac@...ebox.fr>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Arnaud Vrac <avrac@...ebox.fr>
Subject: [PATCH 11/11] drm/msm/dpu: do not use mixer that supports dspp
 when not required

This avoids using lm blocks that support DSPP when not needed, to
keep those resources available.

Signed-off-by: Arnaud Vrac <avrac@...ebox.fr>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
index f4dda88a73f7d..4b393d46c743f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
@@ -362,7 +362,7 @@ static bool _dpu_rm_check_lm_and_get_connected_blks(struct dpu_rm *rm,
 	*pp_idx = idx;
 
 	if (!reqs->topology.num_dspp)
-		return true;
+		return !lm_cfg->dspp;
 
 	idx = lm_cfg->dspp - DSPP_0;
 	if (idx < 0 || idx >= ARRAY_SIZE(rm->dspp_blks)) {

-- 
2.40.0