drm/panfrost: Add the MT8192 GPU ID

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>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230316102041.210269-10-angelogioacchino.delregno@collabora.com

diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
index 6452e4e..d28b997 100644 (file)
--- 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)