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Subject[PATCH v2 08/10] drm/panfrost: Add the MT8192 GPU ID
Date
From: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>

MediaTek MT8192 has a Mali-G57 with a special GPU ID. Add its GPU ID,
but treat it as otherwise identical to a standard Mali-G57.

We do _not_ fix up the GPU ID here -- userspace needs to be aware of the
special GPU ID, in case we find functional differences between
MediaTek's implementation and the standard Mali-G57 down the line.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
---
drivers/gpu/drm/panfrost/panfrost_gpu.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
index 6452e4e900dd..d28b99732dde 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gpu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
@@ -204,6 +204,14 @@ static const struct panfrost_model gpu_models[] = {

GPU_MODEL(g57, 0x9001,
GPU_REV(g57, 0, 0)),
+
+ /* MediaTek MT8192 has a Mali-G57 with a different GPU ID from the
+ * standard. Arm's driver does not appear to handle this model.
+ * ChromeOS has a hack downstream for it. Treat it as equivalent to
+ * standard Mali-G57 for now.
+ */
+ GPU_MODEL(g57, 0x9003,
+ GPU_REV(g57, 0, 0)),
};

static void panfrost_gpu_init_features(struct panfrost_device *pfdev)
--
2.39.2
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