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From: Rob Clark <robin.clark@oss.qualcomm.com>
To: dri-devel@lists.freedesktop.org
Cc: linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org,
	Akhil P Oommen <akhilpo@oss.qualcomm.com>,
	Rob Clark <robin.clark@oss.qualcomm.com>,
	Sean Paul <sean@poorly.run>,
	Konrad Dybcio <konradybcio@kernel.org>,
	Dmitry Baryshkov <lumag@kernel.org>,
	Abhinav Kumar <abhinav.kumar@linux.dev>,
	Jessica Zhang <jessica.zhang@oss.qualcomm.com>,
	Marijn Suijten <marijn.suijten@somainline.org>,
	David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH 3/7] drm/msm: Fix order of selector programming in cluster snapshot
Date: Mon, 28 Jul 2025 13:34:03 -0700	[thread overview]
Message-ID: <20250728203412.22573-4-robin.clark@oss.qualcomm.com> (raw)
In-Reply-To: <20250728203412.22573-1-robin.clark@oss.qualcomm.com>

Program the selector _after_ selecting the aperture.  This aligns with
the downstream driver, and fixes a case where we were failing to capture
ctx0 regs (and presumably what we thought were ctx1 regs were actually
ctx0).

Suggested-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
index e586577e90de..b253ef38eebf 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
@@ -759,15 +759,15 @@ static void a7xx_get_cluster(struct msm_gpu *gpu,
 	size_t datasize;
 	int i, regcount = 0;
 
-	/* Some clusters need a selector register to be programmed too */
-	if (cluster->sel)
-		in += CRASHDUMP_WRITE(in, cluster->sel->cd_reg, cluster->sel->val);
-
 	in += CRASHDUMP_WRITE(in, REG_A7XX_CP_APERTURE_CNTL_CD,
 		A7XX_CP_APERTURE_CNTL_CD_PIPE(cluster->pipe_id) |
 		A7XX_CP_APERTURE_CNTL_CD_CLUSTER(cluster->cluster_id) |
 		A7XX_CP_APERTURE_CNTL_CD_CONTEXT(cluster->context_id));
 
+	/* Some clusters need a selector register to be programmed too */
+	if (cluster->sel)
+		in += CRASHDUMP_WRITE(in, cluster->sel->cd_reg, cluster->sel->val);
+
 	for (i = 0; cluster->regs[i] != UINT_MAX; i += 2) {
 		int count = RANGE(cluster->regs, i);
 
-- 
2.50.1


  parent reply	other threads:[~2025-07-28 20:34 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-28 20:34 [PATCH 0/7] drm/msm: Various snapshot fixes Rob Clark
2025-07-28 20:34 ` [PATCH 1/7] drm/msm: Add missing "location"s to devcoredump Rob Clark
2025-07-28 21:03   ` Connor Abbott
2025-07-28 22:15     ` Rob Clark
2025-07-29 13:40       ` Rob Clark
2025-07-31 19:15         ` Connor Abbott
2025-07-31 20:31           ` Rob Clark
2025-07-28 20:34 ` [PATCH 2/7] drm/msm: Fix section names and sizes Rob Clark
2025-07-28 20:34 ` Rob Clark [this message]
2025-07-28 20:34 ` [PATCH 4/7] drm/msm: Constify snapshot tables Rob Clark
2025-07-28 20:34 ` [PATCH 5/7] drm/msm: Fix a7xx debugbus read Rob Clark
2025-07-29  9:07   ` kernel test robot
2025-07-28 20:34 ` [PATCH 6/7] drm/msm: Fix debugbus snapshot Rob Clark
2025-07-28 20:34 ` [PATCH 7/7] drm/msm: Fix a7xx TPL1 cluster snapshot Rob Clark

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