From 47b28ce43f248cb91f8f4641827c9db90632e18f Mon Sep 17 00:00:00 2001
From: David Michael <fedora.dm0@gmail.com>
Date: Tue, 15 Aug 2023 21:42:41 -0400
Subject: drm/panfrost: Skip speed binning on EOPNOTSUPP
Git-commit: f19df6e4de64b7fc6d71f192aa9ff3b701e4bade
Patch-mainline: v6.5
References: jsc#PED-3527 jsc#PED-5475 jsc#PED-6068 jsc#PED-6070 jsc#PED-6116 jsc#PED-6120 jsc#PED-5065 jsc#PED-5477 jsc#PED-5511 jsc#PED-6041 jsc#PED-6069 jsc#PED-6071
Encountered on an ARM Mali-T760 MP4, attempting to read the nvmem
variable can also return EOPNOTSUPP instead of ENOENT when speed
binning is unsupported.
Cc: <stable@vger.kernel.org>
Fixes: 7d690f936e9b ("drm/panfrost: Add basic support for speed binning")
Signed-off-by: David Michael <fedora.dm0@gmail.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87msyryd7y.fsf@gmail.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index 58dfb15a8757..e78de99e9933 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -96,7 +96,7 @@ static int panfrost_read_speedbin(struct device *dev)
* keep going without it; any other error means that we are
* supposed to read the bin value, but we failed doing so.
*/
- if (ret != -ENOENT) {
+ if (ret != -ENOENT && ret != -EOPNOTSUPP) {
DRM_DEV_ERROR(dev, "Cannot read speed-bin (%d).", ret);
return ret;
}
--
2.42.0