linux-kernel - [PATCH 10/21] drm/msm/dpu: fix lm number counter for quad-pipe

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Message-Id: <20240829-sm8650-v6-11-hmd-pocf-mdss-quad-upstream-8-v1-10-bdb05b4b5a2e@linaro.org>
Date: Thu, 29 Aug 2024 18:17:39 +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 10/21] drm/msm/dpu: fix lm number counter for quad-pipe

Add the case to reserve multiple pair mixer for high resolution

Signed-off-by: Jun Nie <jun.nie@...aro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 6 +++---
 drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c      | 8 +++++++-
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 33cfd94badaba..f57725ad494d2 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -54,7 +54,7 @@
 #define MAX_PHYS_ENCODERS_PER_VIRTUAL \
 	(MAX_H_TILES_PER_DISPLAY * NUM_PHYS_ENCODER_TYPES)
 
-#define MAX_CHANNELS_PER_ENC 2
+#define MAX_CHANNELS_PER_ENC 4
 
 #define IDLE_SHORT_TIMEOUT	1
 
@@ -2029,8 +2029,8 @@ static void dpu_encoder_helper_reset_mixers(struct dpu_encoder_phys *phys_enc)
 	struct dpu_hw_mixer_cfg mixer;
 	int i, num_lm;
 	struct dpu_global_state *global_state;
-	struct dpu_hw_blk *hw_lm[2];
-	struct dpu_hw_mixer *hw_mixer[2];
+	struct dpu_hw_blk *hw_lm[MAX_CHANNELS_PER_ENC];
+	struct dpu_hw_mixer *hw_mixer[MAX_CHANNELS_PER_ENC];
 	struct dpu_hw_ctl *ctl = phys_enc->hw_ctl;
 
 	memset(&mixer, 0, sizeof(mixer));
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
index e219d706610c2..77d7ff789346e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
@@ -306,7 +306,11 @@ static int _dpu_rm_reserve_lms(struct dpu_rm *rm,
 		if (!rm->mixer_blks[i])
 			continue;
 
-		lm_count = 0;
+		/*
+		 * Clear the last bit to drop the previous primary mixer if
+		 * fail to find its peer.
+		 */
+		lm_count &= 0xfe;
 		lm_idx[lm_count] = i;
 
 		if (!_dpu_rm_check_lm_and_get_connected_blks(rm, global_state,
@@ -353,6 +357,8 @@ static int _dpu_rm_reserve_lms(struct dpu_rm *rm,
 
 		trace_dpu_rm_reserve_lms(lm_idx[i] + LM_0, enc_id,
 					 pp_idx[i] + PINGPONG_0);
+		DPU_DEBUG("reserve lm[%d]:%d, pp_idx[%d]:%d, dspp[%d]:%d for enc_id %d\n",
+			  i, lm_idx[i], i, pp_idx[i], i, dspp_idx[i], enc_id);
 	}
 
 	return 0;

-- 
2.34.1