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Message-ID: <20241014233758.994861-2-adrian.larumbe@collabora.com>
Date: Tue, 15 Oct 2024 00:31:37 +0100
From: Adrián Larumbe <adrian.larumbe@...labora.com>
To: Boris Brezillon <boris.brezillon@...labora.com>,
Rob Herring <robh@...nel.org>,
Steven Price <steven.price@....com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>,
Simona Vetter <simona@...ll.ch>,
Philipp Zabel <p.zabel@...gutronix.de>
Cc: kernel@...labora.com,
Adrián Larumbe <adrian.larumbe@...labora.com>,
dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/9] drm/panfrost: handle inexistent GPU during probe
Just in case we're dealing with a yet not recognised device.
Signed-off-by: Adrián Larumbe <adrian.larumbe@...labora.com>
---
drivers/gpu/drm/panfrost/panfrost_gpu.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
index 5a33919fa213..495621324de1 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gpu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
@@ -237,9 +237,10 @@ static const struct panfrost_model gpu_models[] = {
*/
GPU_MODEL(g57, 0x9003,
GPU_REV(g57, 0, 0)),
+ {0},
};
-static void panfrost_gpu_init_features(struct panfrost_device *pfdev)
+static int panfrost_gpu_init_features(struct panfrost_device *pfdev)
{
u32 gpu_id, num_js, major, minor, status, rev;
const char *name = "unknown";
@@ -324,6 +325,12 @@ static void panfrost_gpu_init_features(struct panfrost_device *pfdev)
break;
}
+ if (!model->name) {
+ dev_err(pfdev->base.dev, "GPU model not found: mali-%s id rev %#x %#x\n",
+ name, gpu_id, rev);
+ return -ENODEV;
+ }
+
bitmap_from_u64(pfdev->features.hw_features, hw_feat);
bitmap_from_u64(pfdev->features.hw_issues, hw_issues);
@@ -344,6 +351,8 @@ static void panfrost_gpu_init_features(struct panfrost_device *pfdev)
dev_info(pfdev->base.dev, "shader_present=0x%0llx l2_present=0x%0llx",
pfdev->features.shader_present, pfdev->features.l2_present);
+
+ return 0;
}
void panfrost_cycle_counter_get(struct panfrost_device *pfdev)
@@ -486,7 +495,9 @@ int panfrost_gpu_init(struct panfrost_device *pfdev)
if (err)
return err;
- panfrost_gpu_init_features(pfdev);
+ err = panfrost_gpu_init_features(pfdev);
+ if (err)
+ return err;
err = dma_set_mask_and_coherent(pfdev->base.dev,
DMA_BIT_MASK(FIELD_GET(0xff00,
--
2.46.2
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