linux-kernel - [PATCH 07/21] drm/msm/dpu: Support dynamic DSC number

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Message-Id: <20240829-sm8650-v6-11-hmd-pocf-mdss-quad-upstream-8-v1-7-bdb05b4b5a2e@linaro.org>
Date: Thu, 29 Aug 2024 18:17:36 +0800
From: Jun Nie <jun.nie@...aro.org>
To: Rob Clark <robdclark@...il.com>, 
 Abhinav Kumar <quic_abhinavk@...cinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Sean Paul <sean@...rly.run>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Jun Nie <jun.nie@...aro.org>
Subject: [PATCH 07/21] drm/msm/dpu: Support dynamic DSC number

Do not assume DSC number as 2. Because there are 4 DSC in
quad pipe case.

Signed-off-by: Jun Nie <jun.nie@...aro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 6bdd9c21ff3ed..05b203be2a9bc 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -553,9 +553,9 @@ bool dpu_encoder_use_dsc_merge(struct drm_encoder *drm_enc)
 		if (dpu_enc->phys_encs[i])
 			intf_count++;
 
-	/* See dpu_encoder_get_topology, we only support 2:2:1 topology */
+	/* DSC and mixer are mapped 1:1, so reuse the mixer number */
 	if (dpu_enc->dsc)
-		num_dsc = 2;
+		num_dsc = dpu_crtc_get_lm_num(drm_enc->crtc->state);
 
 	return (num_dsc > 0) && (num_dsc > intf_count);
 }

-- 
2.34.1