linux-kernel - [PATCH 1/2] drm/msm/a6xx: Fix perfcounter oob timeout

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Date:   Mon,  5 Apr 2021 19:17:12 +0530
From:   Akhil P Oommen <akhilpo@...eaurora.org>
To:     freedreno@...ts.freedesktop.org
Cc:     dri-devel@...edesktop.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, jordan@...micpenguin.net,
        eric@...olt.net, jonathan@...ek.ca, robdclark@...il.com,
        dianders@...omium.org
Subject: [PATCH 1/2] drm/msm/a6xx: Fix perfcounter oob timeout

We were not programing the correct bit while clearing the perfcounter oob.
So, clear it correctly using the new 'clear' bit. This fixes the below
error:

[drm:a6xx_gmu_set_oob] *ERROR* Timeout waiting for GMU OOB set PERFCOUNTER: 0x80000000

Signed-off-by: Akhil P Oommen <akhilpo@...eaurora.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 863047b..6a86cd0 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -246,7 +246,7 @@ static int a6xx_gmu_hfi_start(struct a6xx_gmu *gmu)
 }
 
 struct a6xx_gmu_oob_bits {
-	int set, ack, set_new, ack_new;
+	int set, ack, set_new, ack_new, clear, clear_new;
 	const char *name;
 };
 
@@ -260,6 +260,8 @@ static const struct a6xx_gmu_oob_bits a6xx_gmu_oob_bits[] = {
 		.ack = 24,
 		.set_new = 30,
 		.ack_new = 31,
+		.clear = 24,
+		.clear_new = 31,
 	},
 
 	[GMU_OOB_PERFCOUNTER_SET] = {
@@ -268,18 +270,22 @@ static const struct a6xx_gmu_oob_bits a6xx_gmu_oob_bits[] = {
 		.ack = 25,
 		.set_new = 28,
 		.ack_new = 30,
+		.clear = 25,
+		.clear_new = 29,
 	},
 
 	[GMU_OOB_BOOT_SLUMBER] = {
 		.name = "BOOT_SLUMBER",
 		.set = 22,
 		.ack = 30,
+		.clear = 30,
 	},
 
 	[GMU_OOB_DCVS_SET] = {
 		.name = "GPU_DCVS",
 		.set = 23,
 		.ack = 31,
+		.clear = 31,
 	},
 };
 
@@ -335,9 +341,9 @@ void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
 		return;
 
 	if (gmu->legacy)
-		bit = a6xx_gmu_oob_bits[state].ack;
+		bit = a6xx_gmu_oob_bits[state].clear;
 	else
-		bit = a6xx_gmu_oob_bits[state].ack_new;
+		bit = a6xx_gmu_oob_bits[state].clear_new;
 
 	gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, 1 << bit);
 }
-- 
2.7.4