[PATCH 5.12 224/384] drm/msm/a6xx: Fix perfcounter oob timeout

From: Greg Kroah-Hartman
Date: Mon May 10 2021 - 08:26:06 EST


From: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxx>

[ Upstream commit 2fc8a92e0a22c483e749232d4f13c77a92139aa7 ]

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@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/1617630433-36506-1-git-send-email-akhilpo@xxxxxxxxxxxxxx
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 91cf46f84025..3d55e153fa9c 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);
}
--
2.30.2