This is a note to let you know that I've just added the patch titled
platform/x86/amd: pmc: Don't try to read SMU version on Picasso
to the 6.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
platform-x86-amd-pmc-don-t-try-to-read-smu-version-o.patch
and it can be found in the queue-6.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7f4743952198175868cd510b1a85f9d18c8829f5
Author: Mario Limonciello <mario.limonciello@xxxxxxx>
Date: Mon Apr 10 00:23:41 2023 +0530
platform/x86/amd: pmc: Don't try to read SMU version on Picasso
[ Upstream commit b845772677ea19b8e4c032bc07393ef32de4ee39 ]
Picasso doesn't support the command in the uPEP mailbox to try to
read the SMU version.
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2449
Fixes: f6045de1f532 ("platform/x86: amd-pmc: Export Idlemask values based on the APU")
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Link: https://lore.kernel.org/r/20230409185348.556161-2-Shyam-sundar.S-k@xxxxxxx
Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c
index 2edaae04a6912..4ffb08d2b01bc 100644
--- a/drivers/platform/x86/amd/pmc.c
+++ b/drivers/platform/x86/amd/pmc.c
@@ -403,6 +403,9 @@ static int amd_pmc_get_smu_version(struct amd_pmc_dev *dev)
int rc;
u32 val;
+ if (dev->cpu_id == AMD_CPU_ID_PCO)
+ return -ENODEV;
+
rc = amd_pmc_send_cmd(dev, 0, &val, SMU_MSG_GETSMUVERSION, 1);
if (rc)
return rc;
