linux-kernel - [PATCH v4 07/14] drm/msm/adreno: Disable has_cached

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Date:   Tue, 14 Mar 2023 16:28:38 +0100
From:   Konrad Dybcio <konrad.dybcio@...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>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Rob Clark <robdclark@...omium.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH v4 07/14] drm/msm/adreno: Disable has_cached_coherent in
 GMU wrapper configurations

A610 and A619_holi 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. Extend the disablement to adreno_has_gmu_wrapper,
as none of the GMU wrapper Adrenos that don't support yet seem to feature it.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 drivers/gpu/drm/msm/adreno/adreno_device.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index f35392c034f7..6513c6094865 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -540,7 +540,6 @@ 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;
 
 	gpu = info->init(drm);
 	if (IS_ERR(gpu)) {
@@ -552,6 +551,10 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
 	if (ret)
 		return ret;
 
+	if (config.rev.core >= 6)
+		if (!adreno_has_gmu_wrapper(to_adreno_gpu(gpu)))
+			priv->has_cached_coherent = true;
+
 	return 0;
 }
 

-- 
2.39.2