linux-kernel - [PATCH v2 05/14] drm/msm/adreno: Disable has_cached_coherent for A610/A619

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Date:   Tue, 14 Feb 2023 18:31:36 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org
Cc:     marijn.suijten@...ainline.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>,
        Chia-I Wu <olvaffe@...il.com>,
        Ricardo Ribalda <ribalda@...omium.org>,
        Nathan Chancellor <nathan@...nel.org>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 05/14] drm/msm/adreno: Disable has_cached_coherent for A610/A619_holi

These SKUs don't support the feature. Disable it to make the GPU stop
crashing after almost each and every submission - the received data on
the GPU end was simply incomplete in garbled, resulting in almost nothing
being executed properly.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 drivers/gpu/drm/msm/adreno/adreno_device.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 36f062c7582f..82757f005a1a 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -540,7 +540,13 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
 		config.rev.minor, config.rev.patchid);
 
 	priv->is_a2xx = config.rev.core == 2;
-	priv->has_cached_coherent = config.rev.core >= 6;
+
+	if (config.rev.core >= 6) {
+		/* Exclude A610 and A619_holi */
+		if (!(adreno_cmp_rev(ADRENO_REV(6, 1, 0, ANY_ID), config.rev) ||
+		      adreno_cmp_rev(ADRENO_REV(6, 1, 9, 1), config.rev)))
+			priv->has_cached_coherent = true;
+	}
 
 	gpu = info->init(drm);
 	if (IS_ERR(gpu)) {
-- 
2.39.1